October 2015 - DOMjudge-devel

Possible to show runtime errors to competitors?
by Matthew Fahrenbacher 18 Dec '15

18 Dec '15

Hi all - is there a way to make runtime errors visible to competitors? I'd like our competitors to see that they are getting exceptions (ArrayIndexOutOfBoundsException, etc) and at what line of code (for java). Is this something that can be enabled? Thanks, Matt Fahrenbacher Niles West High School Skokie, Illinois

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Creating team and user accounts in batch mode
by Howard Cheng 16 Nov '15

16 Nov '15

Hi, I would like to create teams and user accounts in batch (e.g. from a spreadsheet). I'm using DOMjudge 4.0.5 and I see that there is an "Import / export" option, but I can't find much documentation on this. I have also somewhat successfully crafted my own SQL statements to insert tuples into the tables directly, but the problem is that I have to ask for the current id for the auto_increment fields of various tables and match them up. It's not a big deal, but if there is an easier option then I would like to know about it. Thanks. Howard -- Howard Cheng e-mail: howard.cheng(a)uleth.ca Dept of Math and CS URL : http://www.cs.uleth.ca/~cheng/ University of Lethbridge Phone : (403) 329-2182 Alberta, Canada Fax : (403) 317-2882

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install domjudge and judgehost in separate machine
by adi ansyah 29 Oct '15

29 Oct '15

hi, i want to install the domjudge and the judgehost in separate machine.but the problem is i cant connect the domjudge to the judgehost. the instruction said: "the DOMjudge REST API credentials on domserver need to be synchronized to each judgehost and edited to point to the domserver." is the /etc/domjudge/restapi.secret the right file?? this is my restapi.secret in judgehost server : default http://10.10.30.71/domjudge/api domjudge oP0MRGIegQtV6rJd 10.10.30.71 is the domjudge's ip address. and 10.10.30.73 is the judgehost's ip address. i cant solve this problem for around 2 weeks now. any help will really be appreciated

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DOMjudge 5.0.1 and Java in "chroot" (Fedora 22 64-bit)
by Marc Furon 25 Oct '15

25 Oct '15

Greetings! I am configuring DOMjudge 5.0.1 in a Fedora 22 64-bit environment. Most things seem to be working. I am trying to get Oracle Java 8u60 to run correctly in a "chroot" environment. I built the chroot directory more-or-less manually, installing Java into it (under /opt) and copying the necessary library files. I also copied /bin/bash into the chroot area along with its necessary library, and linked sh to bash. I edited the java_javac_detect script to run /opt/java/bin/java as "program". If I run a chroot command from the shell, bash starts, and I can run "/opt/java/bin/java -version". It complains about the lack of a monotonic clock but otherwise seems to run. I then tried to run the "Hello World" tests. C and C++ work fine. Java fails. I went into the execution directory and the program.err file says that it could not exec /opt/java/bin/java. Has anyone tried to get this kind of configuration running? Any ideas about how to best configure Java in this environment? Suggestions will be greatly appreciated. Marc

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DOMjudge (automatic) team logins
by kjohns07 25 Oct '15

25 Oct '15

Hey everyone, I was wondering how other people handle logging teams in to domjudge during their competitions? We’ve always have volunteers go around to the team computers and manually log them in before the contest started, but I’ve always found that to be a bit tedious. We never liked the idea of giving the teams their own passwords since they could easily share them with each other. Since we control the contest environment, I found a way to use a local squid proxy to log teams in automatically, without revealing the credentials to the team. I thought I’d share this since someone else might be interested. You can read about it here: http://icpc-environment.github.io/2015/10/24/domjudge-autologin.html I don’t know if there is any interest in merging a feature like this into the main DOMjudge tree though, any thoughts? It’s a relatively small patch, but it’s such a narrow use case I don’t know if it’s worth supporting generally. -Keith Johnson US Southeast Region

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