- DOMjudge-devel - domjudge.org

Help me fix install domjudge on centos 6
by Nguyễn Văn Quân 22 Jul '18

22 Jul '18

Hi, I am install domjudge on centos 6. I have some problem: 1. I can not find how to edit grup when try find file contain GRUB_CMDLINE_LINUX_DEFAULT 2. When I try run bin/judgedaemon, It show error: [Jul 22 07:39:41.424] judgedaemon[21360]: Judge started on laptrinh [DOMjudge/5.3.2] [Jul 22 07:39:41.428] judgedaemon[21360]: Registering judgehost on endpoint http://localhost/domjudge/api [Jul 22 07:39:41.439] judgedaemon[21360]: error: Error while executing curl POST to url http://localhost/domjudge/api/judgehosts: couldn't connect to host I try to change localhos to main domain in restapi.secret file but it have same error: [Jul 22 08:05:24.360] judgedaemon[23100]: Judge started on laptrinh [DOMjudge/5.3.2] [Jul 22 08:05:24.365] judgedaemon[23100]: Registering judgehost on endpoint http://ictu.olp.cachhoc.net/domjudge/api [Jul 22 08:06:27.374] judgedaemon[23100]: error: Error while executing curl POST to url http://ictu.olp.cachhoc.net/domjudge/api/judgehosts: couldn't connect to host Please help me fix 2 bug. Thanks! -- _________________________ Name: Nguyen Van Quan Come from: Bac Ninh, Viet Nam Email: nguyenvanquan7826(a)gmail.com Blog: nguyenvanquan7826.com Phone: +84.96.567.7826

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[Domjudge]: Run checker developed in Checker framework problem?
by Bình Dương, Tran 22 Jul '18

22 Jul '18

Dear Sir, I have a checker from problem set of Northern Eurasia Programming Contest 2017 ( I uploaded it to my google driver and share it below ). The checker had been compiled and packaged into a jar file. I wrapped it by a run script. When I apply this checker (compare checker type) to the problem and trying to evaluate a submission, the following error arose: ==================== [Jul 11 04:58:49.719] testcase_run.sh[48059]: Comparing failed with exitcode 0, compare script output: [Jul 11 04:58:49.731] judgedaemon[47929]: error: Unknown exitcode from testcase_run.sh for s801, testcase 1: 1 ==================== I don't know how to fix it or make the checker work properly, please help me to do that. P/S: Because the original file has been blocked by google security service, I changed its extension to .zi, please rename it back to .zip and check. You can download the checker file from: "https://drive.google.com/open?id=1sV4UDRFS5i3c8HVRqA3UJiLLvumUx8GK" Regards, -- [Điện thoại: (04) 37687717 – Máy lẻ: 100]<http://Email:%20linhpt@fpt.edu.vn/> Thanks & Best regards ------------------------------------ TRẦN BÌNH DƯƠNG Giảng viên bộ môn Công Nghệ Phần mềm Trường Đại học FPT Tel: (04) 37687717 – Máy lẻ: 104 Mobile: 0936 168 165 Email: duongtb(a)fe.edu.vn<mailto:duongtb@fe.edu.vn> _______________________________________________________________________ The information in this e-mail and any attached files are CONFIDENTIAL and may be legally privileged or prohibited from disclosure and unauthorized use. The views of the author may not necessarily reflect those of the Company. It is intended solely for the addressee or the employee or agent responsible for delivering such materials to the addressee. If you have received this message in error please return it to the sender then delete the email and destroy any copies of it. If you are not the intended recipient, any form of reproduction, dissemination, copying, disclosure, modification, distribution and/or publication or any action taken or omitted to be taken in reliance upon this message or its attachments is prohibited and may be unlawful. At present the integrity of e-mail across the Internet cannot be guaranteed and messages sent via this medium are potentially at risk. All liability is excluded to the extent permitted by law for any claims arising as a result of the use of this medium to transmit information by or to FPT University. [https://mail.fpt.com.vn/sign.png] This email and any attachment is intended for use only by specified addressees and may contain legally privileged and/or confidential information. If you are not an intended recipient, please delete the original and any copy of this message, notify the writer by email or telephone at (84-24) 7300 7300 and accept our apologies for any inconvenience. * Please consider the environment before you print this email.

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Network Access inside Chroot environment
by Sarthak Garg 19 Jul '18

19 Jul '18

Hey, We are trying to integrate selenium with domjudge. Could you please help in figuring out the ways we can provide network access in chroot environment. We are trying to run the code below via domjudge. And domjudge is returning the following exception: java.net.UnknownHostException: www.google.com. Could you let us known if there is a work around. code: import java.net.*; import java.io.*; public class Solution { public static void main(String[] args) throws Exception { URL str = new URL("http://www.google.com/"); BufferedReader in = new BufferedReader( new InputStreamReader(str.openStream())); String inputLine; while ((inputLine = in.readLine()) != null) System.out.println(inputLine); in.close(); } }

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Information About: Configuration of Domjudge on ICPC World Finals
by Bình Dương, Tran 18 Jul '18

18 Jul '18

Dear Domjudge Team, Thank for your information on any new proud event of DOMjudge team. I'm working in FPT University in Viet Nam, we have been deploy domjudge in our university to train our ACM Teams. Recently, We would like to expand the ACM training program movement. So one of questions which we are trying to answer is "What is the configuration of Domjudge which is able to support for a contest with about 300 contestants who work individually?" So, could you share to me some information about the configuration which DOMjudge team has been organized in the ICPC World Finals Contest? Thanks for your support. Regards, -- [image: Điện thoại: (04) 37687717 – Máy lẻ: 100] <http://Email:%20linhpt@fpt.edu.vn/> Thanks & Best regards ------------------------------------ *TRẦN BÌNH DƯƠNG * Giảng viên bộ môn Công Nghệ Phần mềm Trường Đại học FPT Tel: (04) 37687717 – Máy lẻ: 104 Mobile: 0936 168 165 Email: duongtb(a)fe.edu.vn _______________________________________________________________________ The information in this e-mail and any attached files are CONFIDENTIAL and may be legally privileged or prohibited from disclosure and unauthorized use. The views of the author may not necessarily reflect those of the Company. It is intended solely for the addressee or the employee or agent responsible for delivering such materials to the addressee. If you have received this message in error please return it to the sender then delete the email and destroy any copies of it. If you are not the intended recipient, any form of reproduction, dissemination, copying, disclosure, modification, distribution and/or publication or any action taken or omitted to be taken in reliance upon this message or its attachments is prohibited and may be unlawful. At present the integrity of e-mail across the Internet cannot be guaranteed and messages sent via this medium are potentially at risk. All liability is excluded to the extent permitted by law for any claims arising as a result of the use of this medium to transmit information by or to FPT University.

2 4

Re: Error while launching the dj_setup_database install
by Nicky Gerritsen 09 Jul '18

09 Jul '18

Hi Guillaume, Please don’t forgot to add the devel list in your mails. For your question: I’m not entirely sure. I think you can configure it using the MySQL server configuration. Regards, Nicky > On 6 Jul 2018, at 13:59, Guillaume MILAN <guillaumilan(a)gmail.com> wrote: > > Hi Nicky > Is it possible to change the mysql default collation? To be able to create the domjudge data base with the correct collation? > > Regards, > Guillaume > > > Le 6 juil. 2018 13:09, "Nicky Gerritsen" <nickygerritsen(a)me.com <mailto:nickygerritsen@me.com>> a écrit : > Hi Guillaume, > > This might happen with specific MySQL collations. If I remember correctly either utf8 or utf8mb4 has this issue and the other doesn’t. > > Regards, > > Nicky > >> On 6 Jul 2018, at 13:04, Guillaume MILAN <guillaumilan(a)gmail.com <mailto:guillaumilan@gmail.com>> wrote: >> >> Hello while I launch the dj_setup_database executable, >> I receive the following error. >> >> ERROR 1071 (42000) at line 436: Specified key was too long; max key length is 767 bytes >> >> Do you know what can create this error? >> >> Regards >> Guillaume >> >> _______________________________________________ >> DOMjudge-devel mailing list >> DOMjudge-devel(a)domjudge.org <mailto:DOMjudge-devel@domjudge.org> >> https://www.domjudge.org/mailman/listinfo/domjudge-devel <https://www.domjudge.org/mailman/listinfo/domjudge-devel> > >

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Error while launching the dj_setup_database install
by Guillaume MILAN 06 Jul '18

06 Jul '18

Hello while I launch the dj_setup_database executable, I receive the following error. *ERROR 1071 (42000) at line 436: Specified key was too long; max key length is 767 bytes* Do you know what can create this error? Regards Guillaume

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[Domjudge] : Internal error occurred
by Bình Dương, Tran 26 Jun '18

26 Jun '18

Dear Sirs, When a contestant submit his work to server for judgement and the problem have a checker need to execute to compare the result, I got following message, I don't know how to solve this problem and how to prevent it happen again. [Jun 18 20:34:26.475] judgedaemon[12171]: API request GET config [Jun 18 20:34:26.564] judgedaemon[12171]: API request GET config [Jun 18 20:34:26.654] judgedaemon[12171]: Working directory: /opt/domjudge/judgehost/judgings/UPM02/endpoint-default/c5-s207-j239 [Jun 18 20:34:26.658] judgedaemon[12171]: API request GET submission_files [Jun 18 20:34:26.754] compile.sh[45693]: starting '/opt/domjudge/judgehost/lib/judge/compile.sh', PID = 45693 [Jun 18 20:34:26.757] compile.sh[45693]: arguments: '/opt/domjudge/judgehost/judgings/UPM02/endpoint-default/executable/cpp/run' '/opt/domjudge/judgehost/judgings/UPM02/endpoint-default/c5-s207-j239' [Jun 18 20:34:26.760] compile.sh[45693]: source file(s): D.cpp [Jun 18 20:34:26.766] compile.sh[45693]: starting compile [Jun 18 20:34:27.980] compile.sh[45693]: checking compilation exit-status [Jun 18 20:34:27.986] compile.sh[45693]: Compilation successful [Jun 18 20:34:27.989] compile.sh[45693]: exiting, code = '0' [Jun 18 20:34:27.992] judgedaemon[12171]: API request PUT judgings/239 [Jun 18 20:34:28.084] judgedaemon[12171]: executing chroot script: 'chroot-startstop.sh start' [Jun 18 20:34:28.222] judgedaemon[12171]: API request GET config [Jun 18 20:34:28.315] judgedaemon[12171]: API request GET testcases [Jun 18 20:34:28.409] judgedaemon[12171]: Running testcase 1... [Jun 18 20:34:28.417] judgedaemon[12171]: Fetching new executable 'checker_disarray' [Jun 18 20:34:28.424] judgedaemon[12171]: API request GET executable [Jun 18 20:34:28.519] judgedaemon[12171]: Unzipping [Jun 18 20:34:28.523] judgedaemon[12171]: fetching executable failed for compare script 'checker_disarray':Invalid executable, file 'build' exists but is not executable. Please give me some guides. Regards, -- [image: Điện thoại: (04) 37687717 – Máy lẻ: 100] <http://Email:%20linhpt@fpt.edu.vn/> Thanks & Best regards ------------------------------------ *TRẦN BÌNH DƯƠNG * Giảng viên bộ môn Công Nghệ Phần mềm Trường Đại học FPT Tel: (04) 37687717 – Máy lẻ: 104 Mobile: 0936 168 165 Email: duongtb(a)fe.edu.vn _______________________________________________________________________ The information in this e-mail and any attached files are CONFIDENTIAL and may be legally privileged or prohibited from disclosure and unauthorized use. The views of the author may not necessarily reflect those of the Company. It is intended solely for the addressee or the employee or agent responsible for delivering such materials to the addressee. If you have received this message in error please return it to the sender then delete the email and destroy any copies of it. If you are not the intended recipient, any form of reproduction, dissemination, copying, disclosure, modification, distribution and/or publication or any action taken or omitted to be taken in reliance upon this message or its attachments is prohibited and may be unlawful. At present the integrity of e-mail across the Internet cannot be guaranteed and messages sent via this medium are potentially at risk. All liability is excluded to the extent permitted by law for any claims arising as a result of the use of this medium to transmit information by or to FPT University.

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Swap for judgehosts
by Wim de With 07 May '18

07 May '18

Hello, I was reading the adminstrators manual and I have a question about the section about setting up a judgehost: https://www.domjudge.org/docs/admin-manual-3.html#ss3.7 It recommends the 'swapaccount=1' kernel parameter, but that made me wonder if you actually want swap on a judgehost. I'm not fully familiar with how Linux processes and swap work in detail, but say a judgehost is judging a random submission while the RAM of the host is almost exhausted. If the memory is swapped to disk to clear space for the memory allocated by the submission, doesn't that potentially heavily impact the run time of the submission? And if that's true, wouldn't you see a TIMELIMIT that is not fully justified, because while you might not exceed CPU time, you will exceed wall time? I hope you can shed some light on this. Regards, Wim

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API Call is Running Slow
by Andrew Jauhari 06 May '18

06 May '18

Dear Mr. Jaap, We are currently having problem with 20+ of testcase our judging process is running slow. In debugging process, we found out that process of API Call in fetching config and testcases is 5 to 7 seconds each. The compiling and executing process has no problem in time manner. Do you have suggestion where we can fix about this ? Regards, Andrew Jauhari --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

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Presence at the World Finals
by Jaap Eldering 15 Apr '18

15 Apr '18

Hi all, The DOMjudge team is again present at the ICPC World Finals this year. As we speak we're already setting up our systems, and running as the primary contest control system this year! If anyone is interested to talk and meet, please do get in touch or simply find us at the WFs! We love to talk and get feedback, discuss your use cases, issues, feature (requests), etc. Best, Jaap

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How to upgrade domjudge system from 5.1.3 to 5.3.2 without changing current data
by Bình Dương, Tran 12 Apr '18

12 Apr '18

Hi all, I'm managing a domjudge system ver 5.1.3, and I hold many contests with lots of problemsets and students works there. Now I installed a new judgehost with domjudge ver 5.3.2, and I coped with this error while connecting judgehost with the legacy domjudge server via APIs, I think that it's an incompatible error. "Configuration variable 'diskspace_error' not found." I would like to solve this problem, but I don't know how to? BTW, I also want to upgrade the domjudge server system, but I don't know the procedure must be followed? Regards

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Differences between master and ICPC-live
by Tobias Werth 28 Mar '18

28 Mar '18

Hi, I want to get rid of the ICPC-live branch as soon as possible after the finals. I also think that we should do this first before we do any further symfony migration. This is a list of the differences to get the discussion started (I probably missed some things): 1) entry_point handling Options: a) add a global configuration b) always require an entry_point if the language itself requires an entry_point c) detect entry_point on domserver I would go with b). By default we can use compile scripts that auto-detect and configure languages as such. In a setting primary/shadow setting, we can require entry points as we do now. 2) Minor things: - Pause contest countdown / starttime_enabled - tsv/yaml import scripts - results/tsv export scripts There's no reason to disable these. 3) external IDs / external results - have only one database scheme, i.e. include columns for external_ids and _results - why don't we always use the contest shortname as ID in the API? - can we drop the expected result in favor of external results? (note that we didn't do a comparison on testcase level in the past but might want to do it in the future) - external_ids and _results can be used even in primary mode where we could fetch the results from the secondary 4) display test case results in submission lists Options: a) make it configurable (either per contest or globally) b) always display them (for jury of course) I don't think the test case results clutter the submission page too much, so I would just keep them always on for simpler code. 5) removed time intervals The code in calcContestTime looks fairly simple. The UI only affects the contest page. Did I miss anything? Best, Tobi

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use installed library during the execution of the runguard
by Guillaume MILAN 23 Mar '18

23 Mar '18

Hello, I installed a software library on my debian system with apt-get. But the library doesn't appear in the /usr/lib folder during the runguard execution. As i understood you create temporary symbolic link in the root folder of the chroot execution which is located in the folder c<contest>-s<problem>-j<id>. >From where do you create your symbolic link. Regards Guillaume

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[USER] Non-zero exitcode
by Guillaume MILAN 14 Mar '18

14 Mar '18

Hello, I am currently trying to create my own run and compare script for the judging system and I got the following message as output. Non-zero exitcode runtime: s cpu, s wall memory used: bytes ********** runguard stderr follows ********** The exit code is 0 But my both script execute their self correctly and the run script exit with 0 exit code and the compare script exit with the 42 exit code Had I missed something? Regards Guillaume Milan

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Re: [USER] Parallel authentication
by Jaap Eldering 12 Mar '18

12 Mar '18

Hi Guillaume, Sorry that this message wasn't replied to immediately. Also, the correct email address for the list is domjudge-devel(a)domjudge.org not the -owner variant, I'm CC-ing it to the list now. Note that you have to subscribe to be able to send emails to the list. On 05-03-18 17:56, Guillaume MILAN wrote: > Dear developers, > I am currently trying to develop a parallel way for user to login to my server. Indeed, I installed the domjudge server and I have write some scripts to verify via my ldap server that the user is in my ldap database. > > But I would like to know how can i verify if a user is in the domjudge data base and > - if yes verify his password to log him in and > - if he isn't in the domjudge data base I would like to create a domjudge account for him. (does a sha512 hash will be supproted as user name?) > > > Is there any document that describe your authentication process. We're currently changing to using Symfony in master, and there we didn't setup LDAP authentication yet. However, up to version 5.3 you can configure to authenticate users against an LDAP server. See etc/domserver-config.php, the LDAP authentication method and related settings. The authentication code lives in lib/www/auth.php. We also have an option to allow users to self-register with DOMjudge, see the configuration settings in the admin web interface. I'm not the most familiar with this code, so others might want to step in with more details. Best, Jaap

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Live ISO Issue
by Matthew Fahrenbacher 02 Mar '18

02 Mar '18

Hi all - I'm having trouble writing the most recent live ISO file to a USB drive. I've downloaded the latest img from here: https://www.domjudge.org/live/ And used the bzcat command to write data to my usb drive (as root) bzcat domjudge-live_2018-01-09.img.bz2 > /dev/sdb When I boot from the usb stick, I get the menu to pick what I want to boot the computer as (webserver and judgehost, just judgehost, etc), but whenever I pick an option, I drop into intramfs with an errir bout 1 table load failing and 7 loading successfully. Does it matter what format the USB is in before I run the bzcat operation? I didn't think so... [image: Inline image 1] Thanks (and I apologize if this has been answered before)! Matt Fahrenbacher

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[Dj] CPU time vs. Wall time
by PEDRO PABLO GOMEZ MARTIN 01 Mar '18

01 Mar '18

Hello, I've been using DOMjudge since the old 3.x days, and in the last few years I've been applying a couple of changes in my new installations to overcome some problems that, IMHO, have arisen with the new versions. I want to share them in case they are useful for others, they can be considered to by applied to the mainstream version, or to get feedback if I've been doing something wrong. The first one is regarding CPU vs. wall limit times. When runguard is invoked from testcase_run.sh, the script provides it with the parameters --cputime and --walltime. Years ago the walltime was set with 2*${TIMELIMIT}. But at some point in the past, the format of $(TIMELIMIT) was changed to "<soft>:<hard>" and that expression stop working. The script was updated and now the --walltime is exactly the same as --cputime. I experienced difficulties because of that some time ago, because runguard reported Time Limit due walltime exceeded even when the CPU limit was far to be reached. This occurred when the server was suffering a high load, or the first time a big testcase had to be recover from the database. My solution has been to change that script (testcase_run.sh) so the walltime is scaled up. The official script is: runcheck ./run testdata.in program.out \ $GAINROOT "$RUNGUARD" ${DEBUG:+-v} $CPUSET_OPT \ ${USE_CHROOT:+-r "$PWD/.."} \ --nproc=$PROCLIMIT \ --no-core --streamsize=$FILELIMIT \ --user="$RUNUSER" --group="$RUNGROUP" \ *--walltime=$TIMELIMIT --cputime=$TIMELIMIT \* --memsize=$MEMLIMIT --filesize=$FILELIMIT \ --stderr=program.err --outmeta=program.meta -- \ "$PREFIX/$PROGRAM" 2>runguard.err and my change modifies the --walltime line: ... --walltime=*$((4*${TIMELIMIT%:*}))* --cputime=$TIMELIMIT \ ... Note that I'm using a factor of 4 instead of 2 used long ago by DOMjudge. This change works for versions up to 5.1.x. Since DOMjudge 5.2 timelimits can be float values, and my expression is not working anymore. Now bc is needed in order to be able to use float arithmetic: ... --walltime=*$(echo "scale=2;4*${TIMELIMIT%:*}" | bc)* --cputime=$TIMELIMIT \ ... This last patch is due to my college Joan Rodríguez, and adds a new package dependence (in judgehosts) with the bc program. The second change that I've been applying to DOMjudge is in runguard itself, and it is also related with CPU time, although now I'm unsure about the reasons causing my problems. Sometimes, when evaluating java submissions, instead of Time Limit verdict we got Run Error. We solved this issue increasing the real cputime hard limit in runguard. The official runguard adds one second to the CPU time limit, and for some reasons that seems to be insufficient in some cases so we change it to add 2 seconds. In the runguard.c source code: if ( use_cputime ) { /* The CPU-time resource limit can only be specified in seconds, so round up: we can measure actual CPU time used more accurately. Also set the real hard limit one second higher: at the soft limit the kernel will send SIGXCPU at the hard limit a SIGKILL. The SIGXCPU can be caught, but is not by default and gives us a reliable way to detect if the CPU-time limit was reached. */ rlim_t cputime_limit = (rlim_t)ceil(cputime[1]); verbose("setting hard CPU-time limit to %d(+*2*) seconds",(int)cputime_limit); lim.rlim_cur = cputime_limit; ^ lim.rlim_max = cputime_limit+*2*; | setlim(CPU); ^ | } +---------- CHANGED This change avoids those false RUN ERROR verdicts we sporadically suffered. Unfortunally I cannot provide a way to replicate the error because it is quite erratic. As judgehosts we use virtual machines, in case that is important. Thank you for your great DOMjudge. Best regards, Pedro Pablo

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hackathon doodle poll
by Jaap Eldering 24 Feb '18

24 Feb '18

Hi all, We're planning to again organize one or two hackathons in the upcoming two months to advance the API and other tasks, especially focussing on the upcoming ICPC World Finals. If you're interested in joining (non-core/new developers also very welcome!) please fill in the poll: https://doodle.com/poll/vxvs9ri9siq7esgw We're planning to do a full day, roughly between 10 - 20h Europe time, but everyone is welcome to join in when they have time. Best, Jaap

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New team and public UI
by Thijs Kinkhorst 14 Feb '18

14 Feb '18

Hi all, I've just committed to master my attempt at renewing the Team and Public UI's. In my opinion the DOMjudge interface looks a bit dated and could use a fresh coat of paint. Let me know what you think. Note that you need to run composer (see https://www.domjudge.org/docs/admin-manual-10.html#ss10.1) when updating from git sources. It's definitely not "done" in the sense that it could likely be made even better, but I think it's an improvement over what we had. Because of all the developments going on I purposefully kept to relatively minimal changes to get it done (i.e.: no rewriting to templating systems yet, nearly all logic unchanged, scoreboard layout untouched). There's room for more cleanup and refactorng, especailly if we want to change the Jury interface aswell. And if we want to move to proper templating via Twig for the entire interface. That is appropriate for after 6.0 I think. Cheers, Thijs

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I keep getting compiler error
by Mehmet Oguz Yardımcı 03 Feb '18

03 Feb '18

I was trying to setup a domjudge on Digital Ocean Ubuntu Machine. I followed the guide till end. System is running smoothly except that when I try to submit an answer I keep getting this error. Would you please help, I can't fix it for 2 days. Compiling failed with exitcode 255, compiler output: /home/magnus/domjudge/judgehost/bin/runguard: creating cgroup: Failed to remove a non-empty group(50029) Try `/home/magnus/domjudge/judgehost/bin/runguard --help' for more information. Error: failed to set /sys/fs/cgroup/memory/domjudge/dj_cgroup_3376_1517615852/memory.memsw.limit_in_bytes: Cgroup, requested group parameter does not exist

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Re: Kotlin Problem
by Jaap Eldering 14 Jan '18

14 Jan '18

Hi Andrew, [Also including the list again, I made the mistake of dropping it in my first reply.] On 13/01/18 17:30, Andrew Jauhari wrote: > Thanks for the quick reply again, Sir. > > I was supiscious about kotlin is not installed in chroot enviroment too but i have no idea how to install them at chroot enviroment. > > Before you reply, I have managed to make kotlin work by compiling using kotlinc to make java executable (jar), and finally running the program using java and -jar parameter on addition other java parameter. But I worry that it will create future unknown problem. > > Anyway , I need more guidance to install kotlin at chroot mode. Do installing from https://www.domjudge.org/icpc-kotlinc_1.1.4-3~icpc_all.deb, will install kotlin to the chroot environment? Do I need any more steps to make it available to chroot enviroment? Just installing the package above is not enough. What you need to do is to install the package _inside_ the chroot. The steps you need to take are (roughly, it may vary slightly depending on your environment): - copy icpc-kotlinc_1.1.4-3~icpc_all.deb somewhere into your chroot - enter the chroot: sudo chroot /chroot/domjudge (or whatever path you build it at) - install the package there: dpkg -i /path/to/icpc-kotlinc_1.1.4-3~icpc_all.deb - if dpkg complains about missing dependencies, run 'apt-get -f install' or install them and then try again - exit the chroot and test if it works You might need to bind mount /proc, /dev, and/or /dev/pts inside the chroot to make apt-get work. See the domjudge chroot-start-stop.sh file for examples how to do so. Best, Jaap > Thanks before for your guidance. > > Regards > Andrew Jauhari > > > > > Sent from my ASUS > > -------- Original Message -------- > From:Jaap Eldering > Sent:Sat, 13 Jan 2018 20:24:05 +0700 > To:Andrew Jauhari > Subject:Re: Kotlin Problem > > Hi Andrew, > > On 13/01/18 11:17, Andrew Jauhari wrote: >> Dear Domjudge - Developers, >> >> Hello again, I have problem to integrate Kotlin compiler in judgehost. For information, I'm using ubuntu 16.04 and I was installing kotlin from sdkman. But when compiling, it seems that domjudge cannot find kotlinc and kotlin. I have try to move kotlinc and kotlin to /bin/ directory. It seems to solve kotlinc problem, but domjudge still cannot execute kotlin. >> >> >> >> When I try to go to directory where /testcase001/execdir/program resides, and then execute it myself. It seems work and no problem. >> Trying to re-chroot seems doesn't fix this too. > > Did you also install kotlin inside the chroot? Compilation is done outside the chroot, so you need kotlinc available there, but the program is executed inside, so you need kotlin and the Kotlin support libraries inside there. > > If you want you can download https://www.domjudge.org/icpc-kotlinc_1.1.4-3~icpc_all.deb and install that. It's the Kotlin package used for the 2018 world finals environment, and we've also used it during NWERC 2017. > > Best, > Jaap > > >> Looking forward for your replay. Thanks before >> >> >> Regards, >> Andrew Jauhari >> >> >> ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ >> Avast logo >> >> This email has been checked for viruses by Avast antivirus software. >> www.avast.com >> >> >> <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> >> >> >> _______________________________________________ >> DOMjudge-devel mailing list >> DOMjudge-devel(a)domjudge.org >> https://www.domjudge.org/mailman/listinfo/domjudge-devel >> >

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[Fwd: Re: Kotlin Problem]
by Andrew Sagita Jauhari 13 Jan '18

13 Jan '18

Thanks for the quick reply again, Sir. I was supiscious about kotlin is not installed in chroot enviroment too but i have no idea how to install them at chroot enviroment. Before you reply, I have managed to make kotlin work by compiling using kotlinc to make java executable (jar), and finally running the program using java and -jar parameter on addition other java parameter. But I worry that it will create future unknown problem. Anyway , I need more guidance to install kotlin at chroot mode. Do installing from https://www.domjudge.org/icpc-kotlinc_1.1.4-3~icpc_all.deb, will install kotlin to the chroot environment? Do I need any more steps to make it available to chroot enviroment? Thanks before for your guidance. Regards Andrew Jauhari Sent from my ASUS -------- Original Message -------- From:Jaap Eldering <jaap(a)jaapeldering.nl> Sent:Sat, 13 Jan 2018 20:24:05 +0700 To:Andrew Jauhari <andrew(a)mikroskil.ac.id> Subject:Re: Kotlin Problem Hi Andrew, On 13/01/18 11:17, Andrew Jauhari wrote: > Dear Domjudge - Developers, > > Hello again, I have problem to integrate Kotlin compiler in judgehost. For information, I'm using ubuntu 16.04 and I was installing kotlin from sdkman. But when compiling, it seems that domjudge cannot find kotlinc and kotlin. I have try to move kotlinc and kotlin to /bin/ directory. It seems to solve kotlinc problem, but domjudge still cannot execute kotlin. > > > > When I try to go to directory where /testcase001/execdir/program resides, and then execute it myself. It seems work and no problem. > Trying to re-chroot seems doesn't fix this too. Did you also install kotlin inside the chroot? Compilation is done outside the chroot, so you need kotlinc available there, but the program is executed inside, so you need kotlin and the Kotlin support libraries inside there. If you want you can download https://www.domjudge.org/icpc-kotlinc_1.1.4-3~icpc_all.deb and install that. It's the Kotlin package used for the 2018 world finals environment, and we've also used it during NWERC 2017. Best, Jaap > Looking forward for your replay. Thanks before > > > Regards, > Andrew Jauhari > > > ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ > Avast logo <https://www.avast.com/antivirus> > > This email has been checked for viruses by Avast antivirus software. > www.avast.com <https://www.avast.com/antivirus> > > > <#DAB4FAD8-2DD7-40BB-A1B8-4E2AA1F9FDF2> > > > _______________________________________________ > DOMjudge-devel mailing list > DOMjudge-devel(a)domjudge.org > https://www.domjudge.org/mailman/listinfo/domjudge-devel >

1 0

Kotlin Problem
by Andrew Jauhari 13 Jan '18

13 Jan '18

Dear Domjudge - Developers, Hello again, I have problem to integrate Kotlin compiler in judgehost. For information, I'm using ubuntu 16.04 and I was installing kotlin from sdkman. But when compiling, it seems that domjudge cannot find kotlinc and kotlin. I have try to move kotlinc and kotlin to /bin/ directory. It seems to solve kotlinc problem, but domjudge still cannot execute kotlin. When I try to go to directory where /testcase001/execdir/program resides, and then execute it myself. It seems work and no problem. Trying to re-chroot seems doesn't fix this too. Looking forward for your replay. Thanks before Regards, Andrew Jauhari --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

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About Domjudge version 6.0.0 stable version Plan
by Andrew Jauhari 04 Jan '18

04 Jan '18

Dear Domjudge Developers, I'm Andrew Jauhari from Mikroskil, an education institution in Medan, Indonesia. We are going to hold event that will use latest version of domjudge, and version 6.0.0 is prefered, but currently it is not the stable one. From what I see, the current stable version is 5.3.2 and was just released at 29 Dec 2017. I want to ask if domjudge v 6.0.0 stable will be released soon or not ? Can you give information about this, so I can proceed whether I need to use current stable version or wait for stable version of Domjudge 6.0.0 I'm looking forward for your reply. Thanks before. Regards, Andrew Jauhari --- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus

2 1

How to submit via api?
by Nguyễn Văn Quân 23 Dec '17

23 Dec '17

Hi, Thank for your help about install domjudge. Now it work ok and I want to submit problem via api. /domjudge/api/submissions <http://dj5.cachhoc.net/domjudge/api/submissions> (POST) I read the document api but I can not know how to use it. I want use php to post submission, and now I test on postman but don't know what are fields to post data. -- _________________________ Name: Nguyen Van Quan Come from: OTVINA company Email: nguyenvanquan7826(a)gmail.com Blog: nguyenvanquan7826.com Phone: +84.96.567.7826

3 5

ERROR a2enconf
by Nguyễn Văn Quân 20 Dec '17

20 Dec '17

Hi, After config ln -s ln -s /root/domserver/etc/apache.conf /etc/apache2/conf-available/domjudge.conf Then I type command sudo a2enconf domjudge And I get answer *ERROR : Conf domjudge does not Exist* I find a post about this error at here: https://www.domjudge.org/pipermail/domjudge-devel/2016-April/001943.html But I don't know how to fix it by change the permissions. Please help. Thanks! -- _________________________ Name: Nguyen Van Quan Come from: OTVINA company Email: nguyenvanquan7826(a)gmail.com Blog: nguyenvanquan7826.com Phone: +84.96.567.7826

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docker.io/domjudge/domserver disappeared on Dec 11th
by Mathias Rav 18 Dec '17

18 Dec '17

Until December 11th, there was a "domjudge" user on Docker Hub hosting two images: https://hub.docker.com/r/domjudge/domserver/ https://hub.docker.com/r/domjudge/judgehost/ Since December 11th this user seems to have disappeared from the site. Does anyone know who maintained the images and why they are now gone? They have been working just fine for me. Sorry if this list is not the appropriate place for the question. Best regards, Mathias Rav PhD student at Aarhus University, Denmark

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Fwd: Re: domjudge-run submission problem
by Jaap Eldering 12 Dec '17

12 Dec '17

Forwarding the resolution below FYI. Jaap -------- Original Message -------- From: gazibot <infogazibot(a)gmail.com> Sent: December 12, 2017 12:34:57 AM GMT+01:00 To: Jaap Eldering <jaap(a)jaapeldering.nl> Subject: Re: domjudge-run submission problem OMG, IT WORKED I am the happiest guy in the World for 5 minutes. This is the solution that I found for aws ec2 servers Changing the kernel boot parameters on AWS for the official Ubuntu images is just as simple as editing /etc/default/grub.d/50-cloudimg-settings.cfg in the same way you’d usually edit /etc/default/grub. Note that you have to run ‘update-grub’ afterwards and then reboot. Best, Fatih 2017-12-12 2:17 GMT+03:00 gazibot <infogazibot(a)gmail.com>: > $ cat /proc/cmdline > BOOT_IMAGE=/boot/vmlinuz-4.4.0-1041-aws root=UUID=512611f4-b05a-4d8a-b743-438b71c5385d > ro console=tty1 console=ttyS0 > > yes, I am on aws. This system started to getting hard to me. > > Best, > > 2017-12-12 2:09 GMT+03:00 Jaap Eldering <jaap(a)jaapeldering.nl>: > >> On 12/12/17 00:01, gazibot wrote: >> > >> > unfortunately, It does not. After I run /sudo groupadd domjudge-run . >> New error popped up / >> > >> > Compiling failed with exitcode 255, compiler output: >> > /home/ubuntu/domjudge/judgehost/bin/runguard: creating cgroup: Failed >> to remove a non-empty group(50029) >> > Try `/home/ubuntu/domjudge/judgehost/bin/runguard --help' for more >> information. >> > Error: failed to set /sys/fs/cgroup/memory/domjudge >> /dj_cgroup_2169/memory.memsw.limit_in_bytes: Cgroup, requested group >> parameter does not exist >> > >> > >> > >> > than I Edit |/etc/default/grub| and change the default commandline to >> > >> > /GRUB_CMDLINE_LINUX_DEFAULT="quiet cgroup_enable=memory swapaccount=1" >> / >> > >> > than/update-grub /and/reboot/ >> > >> > than sudo ./home/ubuntu/domjudge/judgehost/bin/create_cgroups >> > >> > >> > but this error continued , >> > >> > Compiling failed with exitcode 255, compiler output: >> > /home/ubuntu/domjudge/judgehost/bin/runguard: creating cgroup: Failed >> to remove a non-empty group(50029) >> > Try `/home/ubuntu/domjudge/judgehost/bin/runguard --help' for more >> information. >> > Error: failed to set /sys/fs/cgroup/memory/domjudge >> /dj_cgroup_2169/memory.memsw.limit_in_bytes: Cgroup, requested group >> parameter does not exist >> >> Can you show the output of 'cat /proc/cmdline'? It should contain >> "cgroup_enable=memory swapaccount=1". >> >> From previous lines I think I saw you're running on AWS, and there you >> may need a different way to change the kernel boot parameters, but I don't >> know exactly how. Maybe someone else can step in, or you'd have to search >> the AWS documentation for how to do so. >> >> Best, >> Jaap >> >> >> >> > 2017-12-12 1:39 GMT+03:00 Jaap Eldering <jaap(a)jaapeldering.nl <mailto: >> jaap(a)jaapeldering.nl>>: >> > >> > On 11/12/17 21:05, gazibot wrote: >> > > Hi, >> > > Please, I have some trouble. I am trying the implment domjudge >> for 2th time. Now I working on fresh system and try to setup domjudge >> v5.2.0 on ubuntu 16.04. there was no error in any steps. But after >> submission returns this error. >> > > >> > > Compiling failed with exitcode 255, compiler output: >> > > /home/ubuntu/domjudge/judgehost/bin/runguard: invalid groupname >> or ID specified: `domjudge-run' >> > > Try `/home/ubuntu/domjudge/judgehost/bin/runguard --help' for >> more information. >> > >> > It looks like you missed the command >> > >> > sudo groupadd domjudge-run >> > >> > under https://www.domjudge.org/docs/admin-manual-3.html#ss3.7 < >> https://www.domjudge.org/docs/admin-manual-3.html#ss3.7>. Does that help? >> > >> > Best, >> > Jaap >> > >> > >> > >> > > This is whole my terminal commands given below. >> > > >> > > sudo apt-get update >> > > >> > > sudo apt install gcc g++ make zip unzip mysql-server \ >> > > apache2 php php-cli libapache2-mod-php \ >> > > php-gd php-curl php-mysql php-json php-zip \ >> > > php-mcrypt php-gmp php-xml php-mbstring \ >> > > bsdmainutils ntp phpmyadmin libcgroup-dev \ >> > > linuxdoc-tools linuxdoc-tools-text \ >> > > groff texlive-latex-recommended texlive-latex-extra \ >> > > texlive-fonts-recommended texlive-lang-european >> > > >> > > sudo phpenmod json >> > > >> > > sudo apt install libcurl4-gnutls-dev libjsoncpp-dev libmagic-dev >> > > >> > > sudo apt install make sudo debootstrap libcgroup-dev \ >> > > php-cli php-curl php-json php-zip procps \ >> > > gcc g++ openjdk-8-jre-headless \ >> > > openjdk-8-jdk ghc fp-compiler >> > > >> > > download domjudge wget >> > > >> > > tar xvfz domjudge.tar.gz >> > > >> > > change drictory t0 the extracted folder >> > > >> > > ./configure --prefix=$HOME/domjudge --with-baseurl=localhost/domju >> dge/ >> > > >> > > make domserver && sudo make install-domserver >> > > make judgehost && sudo make install-judgehost >> > > make docs && sudo make install-docs >> > > >> > > ./bin/dj_setup_database -u root -r install >> > > >> > > sudo ln -s /home/ubuntu/domjudge/domserver/etc/apache.conf >> /etc/apache2/conf-available/domjudge.conf >> > > >> > > sudo a2enconf domjudge >> > > >> > > sudo service apache2 reload >> > > >> > > // in the /etc/apache2/conf-available/domjudge.conf file, >> comment out all of this: >> > > // Order allow,deny >> > > // Allow from all >> > > // And replace with: >> > > // Require all granted >> > > sudo vim /etc/apache2/conf-available/domjudge.conf >> > > >> > > sudo apache2ctl graceful >> > > >> > > sudo useradd -d /nonexistent -g nogroup -s /bin/false domjudge-run >> > > sudo useradd -d /nonexistent -g nogroup -s /bin/false >> domjudge-run-0 >> > > >> > > cd judgehost >> > > sudo cp etc/sudoers-domjudge /etc/sudoers.d/ >> > > >> > > sudo /etc/init.d/mysql restart >> > > >> > > sudo apt-get install libcgroup-dev >> > > >> > > cd /home/ubuntu/domjudge/judgehost/bin >> > > >> > > sudo ./dj_make_chroot >> > > sudo ./create_cgroups >> > > ./judgedaemon -n 0 >> > > >> > > >> > > Best, >> > > Fatih >> > >> > >> >> > -- Sent from my Android device with K-9 Mail. Please excuse my brevity.

1 0

Re: URGENT DOMjudge PROBLEM in Southern California
by Marc Furon 13 Nov '17

13 Nov '17

Tobias Werth wrote: > I don't have phone reception but I've sent you an invite to chat > via hangouts. Perhaps you can give more details on the compile > error or give me admin access to your domjudge installation? Tobi, THANK YOU so much for jumping in to help, and thanks to Keith as well. Fixing the permissions on the judging directory (/opt/domjudge/judgehost/judgings) got us back to where we were before, and we made some quick adjustments to the Apache configuration that seemed to help. I can't say for certain if that fixed everything because at that point the contest was close to over (we extended it by one hour) and some teams may have taken off already if they were not in the running. However, we were ultimately able to judge everything and complete the contest (albeit with contestants programming with no feedback for two hours). We in Southern California (that means me) would like to take you up on your offer for assistance with root cause analysis. I have the contest server sitting next to me here at home and can provide anything you might want that would help with troubleshooting. Please let me know what the best way will be to proceed. I owe the DOMjudge team big-time. Marc

2 1

Sample Test Downloads
by Marc Furon 10 Nov '17

10 Nov '17

As I recall, this feature is now supported in 5.2 and later. I have installed 5.3.0. How do contestants access the sample input and output files? I looked in the places where I would expect to find it but did not see it, nor did I see it in the team manual. Regards, Marc

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Re: 5.3.1 and 5.2.1 broken!
by Marc Furon 08 Nov '17

08 Nov '17

Jaap Eldering wrote: > This is to warn you that the 5.3.1 and 5.2.1 releases from a few > days ago are broken due to a regression bug in runguard: > https://github.com/DOMjudge/domjudge/issues/310 > > We're still investigating the precise cause before releasing a > fix. As a workaround we recommend using 5.3.0 instead of 5.3.1, > since the actual changes (besides this bug) are minimal. [...] Thank you for sending this alert. I was in the process of installing 5.3.1 for the Southern California contest this weekend. I will install 5.3.0 instead. Do you recommend I install the work-around patch for "runguard" on the judgehosts separately? Regards, Marc

2 1

need some helps
by easior 03 Nov '17

03 Nov '17

<p>Hi, all in the list.<br /><br />I don't know whether my question is fit here. However, following the link https://github.com/DOMjudge/domjudge/issues/305, I come here to ask for helps. First of all, I want to know how to write a systemd script instead of /etc/init.d/domjudge-judgehost on Fedora box. I'm too little of knowledge of systemd to kick it off. Secondary, I want to create many accounts for domserver in the batches. Is there any Bash/PHP/SQL script to reach this purpose? Thank in advances.</p><p>Best regards,</p><p>Easior</p><p><br /></p><p><br /></p><div style="height:30px;"></div><div style="height:2px;width:298px;border-bottom:solid 2px #e5e5e5"></div><div style="height:20px;"></div><a target="_blank" style="background-image:url(http://r.g.tom.com/kwap/r/app/other/suixinyou.png);bac… center;font-size:14px;background-size: 20px;height: 39px;line-height: 39px;padding-left: 25px;display:block;color:#333333;text-decoration: none;" href="http://mail.tom.com/webmail-static/welcomesxy.html" onmouseover="this.style.cssText='background-image:url(http://r.g.tom.com/kwap/r/app/other/suixinyou.png);bac… center;font-size:14px;background-size: 20px;height: 39px;line-height: 39px;padding-left: 27px;display:block;color:#4c4c4c; text-decoration:underline;'" onmouseout="this.style.cssText='background-image:url(http://r.g.tom.com/kwap/r/app/other/suixinyou.png);bac… center;font-size:14px;background-size: 20px;height: 39px;line-height: 39px;padding-left: 27px;display:block;color:#4c4c4c;text-decoration:none'">随心邮-在微信里收发邮件，及时省电又安心</a>

2 1

Re: judgedaemon compile error
by Tobias Werth 31 Oct '17

31 Oct '17

Hi Fatih, I guess you didn't create the corresponding user for domjudge-run. See https://www.domjudge.org/docs/admin-manual-3.html#ss3.7 We typically start the judgedaemon with -n <core-id>, e.g. -n 0 (even when running a single judgedaemon), then you need to create domjudge-run-0. See https://www.domjudge.org/docs/admin-manual-3.html#ss3.18 Hope that helps, Tobi On Mon, Oct 30, 2017 at 5:50 PM, Fatih özdemir <f4tih.ozd(a)gmail.com> wrote: > Hello, > I have a problem about submissions. When I submit a code on my localhost > domjudge system it returns compile error every time. This is the error > > Compiling failed with exitcode 255, compiler output: > /home/dante/domjudge/judgehost/bin/runguard: invalid groupname or ID > specified: `domjudge-run' > Try `/home/dante/domjudge/judgehost/bin/runguard --help' for more > information. > > Have can I fix it. Thank you for helps > > > -- > Fatih ÖZDEMİR > Türk Hava Kurumu Üniversitesi IEEE sb Computer Society Başkanı

1 0

CTD File Testing
by Bryce Sandlund 24 Oct '17

24 Oct '17

Hi, I am preparing a problem set for Kattis and thought I'd try making a CTD file input format validator. I found the CTD GitHub and have been following along with the README and language specification. I'm currently a little frustrated. By running Kattis problemtools, I can determine if my ctd file compiles and accepts test cases. Currently, I cannot get SPACE EOF to accept a file with a single space, or INT(1,10000) EOF to accept a file with a single integer. I can get EOF to accept an empty file. Clearly something silly is going on, and it'd be much easier to see by a more instructive error message than accepting or not-accepting. So I thought I'd try to compile the ctd file my self, or run it myself and see if there is more error output. It looks like there's no instructions on how to go about doing that in the README on GitHub. I'm also not sure if the error messages would be more informative. I am suggesting such instructions be added to the README and that such a command would be able to give me a more informative error. Bryce

2 1

[Domjudge]: Error when judging a large input and output data file!
by Bình Dương, Tran 18 Oct '17

18 Oct '17

Dear Sirs, In a contest, I uploaded a problem with a pair of input and output data files which are large (greater than 250MB). When my students submitted their codes, the judging system could not perform the judgement because of an error occurrence. The error message is included here: ================================================================ [Oct 18 12:15:00] judgedaemon[20905]: API request GET testcases [Oct 18 12:15:00] judgedaemon[20905]: Running testcase 5... [Oct 18 12:15:00] judgedaemon[20905]: API request GET testcase_files [Oct 18 12:15:05] judgedaemon[20905]: error: Error while executing curl GET to url http://localhost/domjudge/api/testcase_files?testcaseid=8519&input: http status code: 500, response: ================================================================ I don't know how to fix this kind of error, please help me by giving some advices. Regards

4 3

[Domjudge v5.1.3] : About how to apply executable checker for judging problem solutions
by Bình Dương, Tran 06 Oct '17

06 Oct '17

Dear Sir, There are some problems which have multiple solutions and it's necessary to apply executable checker for them. I've got some checkers from problem sources but I don't know how to link the checker with related problem in DomJudge. I think I should create a new executable item for a checker, but I don't know how to. Please, give me some advice. P/S: I attached here some checkers on my side Regards, Thank you -- [image: Điện thoại: (04) 37687717 – Máy lẻ: 100] <http://Email:%20linhpt@fpt.edu.vn/> Thanks & Best regards ------------------------------------ *TRẦN BÌNH DƯƠNG * Giảng viên bộ môn Công Nghệ Phần mềm Trường Đại học FPT Tel: (04) 37687717 – Máy lẻ: 104 Mobile: 0936 168 165 Email: duongtb(a)fe.edu.vn _______________________________________________________________________ The information in this e-mail and any attached files are CONFIDENTIAL and may be legally privileged or prohibited from disclosure and unauthorized use. The views of the author may not necessarily reflect those of the Company. It is intended solely for the addressee or the employee or agent responsible for delivering such materials to the addressee. If you have received this message in error please return it to the sender then delete the email and destroy any copies of it. If you are not the intended recipient, any form of reproduction, dissemination, copying, disclosure, modification, distribution and/or publication or any action taken or omitted to be taken in reliance upon this message or its attachments is prohibited and may be unlawful. At present the integrity of e-mail across the Internet cannot be guaranteed and messages sent via this medium are potentially at risk. All liability is excluded to the extent permitted by law for any claims arising as a result of the use of this medium to transmit information by or to FPT University.

2 1

Problem when using DOMjudge-live image version 2017-02-12
by Quyet Bui 03 Oct '17

03 Oct '17

Hello domjudge team! I have downloaded and run the lastest version of DOMjudge-live image (version 2017-02-12) on virtualbox but my OS could not recognize network card. But it works normally when I use older verison (2017-9-26). Can you help me fix this problem? Thank you!

2 1

DOMjudge live image on Java 1.8
by Peter Hat 21 Sep '17

21 Sep '17

Hello everyone! Is it possible to run the live version of DOMjudge with Java 1.8? If so, how? Since we only get Java 1.7 running. Sincerely yours, Peter

2 1

About: helping me to solve the problems with DomJudge
by Bình Dương, Tran 16 Sep '17

16 Sep '17

Hi, I'm from FPT University in Viet Nam. I'm a coacher of ACM Teams in my university this year. I installed DomJudge successfully ( including domserver and judgehost ) and work with them well. But I faced with two following problems: 1. The judgehost isn't able to judge with Java Code. (I attached an image for the problem) [image: Hình ảnh nội tuyến 2] 2. I still don't know how to set custom_checking script in case of some special problems in a contest which contains statements indicate that it has multiple optimal solution depending on developer. Could you explain and give me an example for that case. ( I can't find any explicit example ) My Best Regards, -- [image: Điện thoại: (04) 37687717 – Máy lẻ: 100] <http://Email:%20linhpt@fpt.edu.vn/> Thanks & Best regards ------------------------------------ *TRẦN BÌNH DƯƠNG * Giảng viên bộ môn Công Nghệ Phần mềm Trường Đại học FPT Tel: (04) 37687717 – Máy lẻ: 104 Mobile: 0936 168 165 Email: duongtb(a)fe.edu.vn _______________________________________________________________________ The information in this e-mail and any attached files are CONFIDENTIAL and may be legally privileged or prohibited from disclosure and unauthorized use. The views of the author may not necessarily reflect those of the Company. It is intended solely for the addressee or the employee or agent responsible for delivering such materials to the addressee. If you have received this message in error please return it to the sender then delete the email and destroy any copies of it. If you are not the intended recipient, any form of reproduction, dissemination, copying, disclosure, modification, distribution and/or publication or any action taken or omitted to be taken in reliance upon this message or its attachments is prohibited and may be unlawful. At present the integrity of e-mail across the Internet cannot be guaranteed and messages sent via this medium are potentially at risk. All liability is excluded to the extent permitted by law for any claims arising as a result of the use of this medium to transmit information by or to FPT University.

2 3

JAVA cgroups help
by 이정진 10 Sep '17

10 Sep '17

Hi. I set cgroups for java, but it does not work and I have some ask. I proceeded to install cgroups as follows the manual 3.17. ======= sudo apt-get install libcgroup-dev sudo edit /etc/default/grub GRUB_CMDLINE_LINUX_DEFAULT="quiet cgroup_enable=memory swapaccount=1" sudo update-grub sudo reboot and I checked the cmdline. cat /proc/cmdline print is BOOT_IMAGE=/boot/.. ~~ ro quiet cgroup_enable=memory swapaccount=1 next sudo ./configure >>During the execution of this command, I confirmed the following message. *use Linux cgroups...: yes sudo make build sudo ./misc-tools/create_cgroups and then, I run judgedaemon. However, judgedamon displays the message "Not using cgroups". ======== Can you tell me where I made the mistake? thanks.

2 1

DOMjudge hackathon(s)
by Tobias Werth 21 Aug '17

21 Aug '17

Hi, we want to do one or two hackathons in ~August to make progress on the implementation of the new REST API and event feed. See https://clics.ecs.baylor.edu/index.php/Main_Page and http://hera.ecs.csus.edu/pipermail/cliccs/ for the current state and discussions. Please fill out the following doodle if you want to participate: https://doodle.com/poll/dchzfbyci32esgh4 Tobi

2 3

Using the integrated event feed
by Phúc Khang Nguyễn 09 Aug '17

09 Aug '17

Hi, I'm currently running DOMjudge v5.1.3. Recently, I wanted to use the Resolver in the ICPCTools. I saw the integrated event feed in /www/feed but I really don't know how to use and I can't find the documentation of the event feed. I'm not a PHP user so I can't come up with any solution on my own. Could you show me how to set it up in order to use the Resolver or link me to the documentation? Best Regards, Khang *Nguyễn Phúc Khang* Mobile: 0931 633 723 Trường Đại học Khoa Học Tự Nhiên, ĐHQG-HCM

2 1

HELP - Writing DOMjudge on to hard disk
by Kevin Paul 13 Jul '17

13 Jul '17

I'm trying to install DOMjudge live on my hard disk as a partition. But I'm new to this and there isn't a lot of information on how to do this. Please help. Thanks in advance.

2 2

Out of range value for column 'totaltime'
by Richard Lobb 12 Jul '17

12 Jul '17

Hi guys We're running domjudge 5.1.1 and for some reason I don't understand we're being plagued this year by errors like the following: error: Error while executing curl POST to url http://domserver.cosc.canterbury.ac.nz/api/judging_runs: http status code: 500, response: error: SQL error, Error#1264: Out of range value for column 'totaltime' at row 1, query: 'REPLACE INTO scorecache_public (cid, teamid, probid, submissions, pending, totaltime, is_correct) VALUES (24,1403,222,1,0,-15780,1)' They occur when you set up a contest with an early opening date for testing purposes, make submissions then, later, move the opening date forward to the correct time. Refreshing the cache then results in those errors (because the submission time relative to the contest start time is negative), crashing the judgehosts. I've been solving the problem by marking the early submissions as "IGNORE this submission" or by hacking at the database directly but neither of those workarounds is very satisfactory. I don't recall having these errors last year, and nor do I think I've upgraded domjudge system since then, though I might have upgraded the OS? Any suggestions for a better work around, please? Richard

2 2

Checktestdata as EDSL
by Jeroen Bransen 30 May '17

30 May '17

Hi all, Checktestdata is a nice DSL and has proved helpful in many situation, but from the moment I used it I was missing features and wondering why it wasn't implemented as an EDSL (Embedded Domain Specific Language). Now, many years later, I've finally found some time to create it. I've implemented a little library in Haskell, and as a sneak preview I've taken the interception problem from NCPC 2016 as referenced to in [1] and attached it. The first question is: where shall I put the sources to the library? Somewhere in the checktestdata repository (and if so, where), or maybe create a checktestdata2 repository? Let me give a little more information on why I think an EDSL is a good idea here, and why I choose for Haskell (other than my background): + With an EDSL, you get so much for free from the underlying language, such as (typed) variables, all sorts of abstraction mechanisms, compiler optimizations, etc. For example, some testdata script may consist of some repeated parts, which in an EDSL can simply be given a name to get rid of the duplication. + Compiler optimizations, which of course also exist for C++ in which checktestdata is built now, don't only optimize the checktestdata runtime, but also the script itself since it is just a program and not some custom script anymore. Especially with a functional language such as Haskell this means definitions of primitives can be inlined and whole parts of the script may get fused to a very efficient version. + Maintainability: my library is now +- 200 LOC, including docs and empty lines, and contains quite a lot of the checktestdata language already. Because Haskell has many well optimized parsing libraries, we get a lot for free, and only have to create a nice generalization for this particular use case. + Efficiency: the current checktestdata is just too slow, as mentioned in [1]. As a reference, on my machine the checktestdata script for interception 09.max_ans.in takes 35.5s, the python script takes 2.2s, and the attached version only 2s. And I haven't done anything to optimize specifically for this case, I've just translated the ctd script to the syntax of my EDSL. + With this, the script can do more than just checking the syntax. I.e. when the problem specifies that it contains a connected graph, one can check the syntax, but also the connectedness of the graph, while still separating concerns, i.e. the syntax of the input can be separated from the semantic checks, but the semantic checks don't need to come in a separate program which also has to read the input again, like we should now. All can be combined naturally. + Create your own combinators: the primitives can be easily combined into more complex combinators which you can then reuse. I.e. think of a 'point2d' combinator that reads two space separated integers. - Haskell Platform needs to be available, this is easy on all major OS, but is a quite large dependency. Then again, GCC and Boost are large as well, and are less Windows-friendly. - Slighly different syntax: although Haskell is quite liberal in its syntax for EDSL's, users have to get used to particularities of the language/ - Data generation is not easily possible, if not infeasible. There should be some way of embedding the language to make this possible, and this is actually what I've been working on for the past few years when thinking about this problem, but since we mostly use it for checking data I went with a monadic embedding which is very easy for data checking. - Backwards compatibility: parsing existing scripts and running it with the new backend is not going to be easy. I don't expect show stoppers, but it definitely won't be as efficient as writing scripts within the language because of variable bindings. I need to work on this a bit to be sure though. That's it, of course my libary is not done yet (no good error messages, no regex yet), but it's a proof of concept that is already usable for simpler problems. I hope to convince you that this is the way to go, and to get some ideas to create the POC into a working tool. Also, suggestions on 'interesting use cases' are welcome, the interception is a nice one but I am sure there are many more problems for which the standard checktestdata just not works. Yours truly, Jeroen [1] https://github.com/DOMjudge/checktestdata/issues/3

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Storing participant program in execdir after judging is complete
by Parth Mittal 28 May '17

28 May '17

Hello We run an instance of domjudge for our university courses, which has a lot of submissions (the judging run table has almost a million rows now). I was exploring ways to reduce the disk usage of the judge, and I found that in the directory for every judging run, we store a copy of the executable under execdir under every testcase. Each executable is > 1 MB, and when this multiplies with number of test cases * number of judgings, this becomes very large in our use case. Is there a reason why the executables are stored after judging is complete? Thank you Parth Mittal

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Option to stop judging when met WA
by Phúc Khang Nguyễn 27 May '17

27 May '17

Hi, I'm wondering if there are any options that can stop the judge when it met a Wrong Answer verdict like Time-limit Exceed or not? (maybe change the code perhaps) If yes, please show me how to do it. Best regards, Khang

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Presence at the World Finals
by Jaap Eldering 13 May '17

13 May '17

Hi all, Most of the DOMjudge developers will again be present at the ICPC World Finals, starting in a week in Rapid City, USA. If anyone else is interested to talk and meet, please do get in touch or simply find us at the WFs! We love to talk and get feedback, discuss your use cases, issues, feature (requests), etc. See you in Rapid City! Jaap

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error with judgedaemon
by Fredy Vanegas 18 Apr '17

18 Apr '17

Hi, i am try install the domjudge, domserver and judgehost in the same machine, but when i execute the judgedaemon "./judgedaemon" in the path ~/domjudge/judgehost/bin give me the next error: [Apr 18 13:22:11] judgedaemon[5016]: Judge started on dom-judge [DOMjudge/5.1.3] [Apr 18 13:22:11] judgedaemon[5016]: Not using cgroups. Using cgroups is highly recommended. See the manual for details. [Apr 18 13:22:11] judgedaemon[5016]: Registering judgehost on endpoint http://localhost/domjudge/api [Apr 18 13:22:12] judgedaemon[5016]: error: Error while executing curl POST to url http://localhost/domjudge/api/judgehosts: http status code: 403, response: <!DOCTYPE html> <html lang="en" xml:lang="en"> <head>  <meta charset="utf-8"/> <title>Login failed</title> <link rel="icon" href="../images/favicon.png" type="image/png" /> <link rel="stylesheet" href="../style.css" type="text/css" /> <link rel="stylesheet" href="style_jury.css" type="text/css" /> <script type="text/javascript" src="../js/jquery.min.js"></script> <script type="text/javascript" src="../js/jury.js"></script> <script type="text/javascript" src="../js/sorttable.js"></script> <script type="text/javascript" src="../js/domjudge.js"></script> </head> <body onload="setInterval('updateMenu(0, 0, 0)', 20000); updateMenu(0,0,0)"> <h1>Not Authenticated</h1> <p>Invalid username or password supplied. Please try again or contact a staff member.</p> </body> </html> I appreciate all the help you can give me.

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Dependent problems
by Solal Pirelli 18 Apr '17

18 Apr '17

Hi all, At the Helvetic Coding Contest - as its name implies, Switzerland's largest programming contest - we patched DOMJudge to add support for hiding problem statements until another problem is solved. For instance, if C depends on B and B depends on A, teams are forced to first solve A, then B, then C. This year we had 5 such chains, for a total of 15 problems. This has two advantages: - It forces beginners to solve easy problems first, ensuring they'll solve a few problems and have fun rather than picking a hard problem whose difficulty is not apparent and getting stuck on it for hours. (This looks like a problem that should be solved by educating users, but as any software engineer knows, that is all but impossible :) ) - It allows us to have a bunch of problems on a common theme, where in a few cases the harder one's statement is simply "like the easier one, but with much larger bounds on the input" without allowing teams to solve the hard one first and then submit that solution to the easier one. More problems, less work for problem creators. Thus our contest is suitable for both beginners and experts (even if beginners don't have a chance of actually winning, they enjoy it). I recently rewrote that patch on top of the master branch of the DOMJudge repo, it's quite small (about 40 modified lines). Is this something DOMJudge users are interested in? Should I open a PR? Cheers, Solal Pirelli

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