On 12-12-15 01:44, Vũ Linh Nguyễn wrote:
> Dear Sir,
>
> I reinstall java outside chroot, and then install as the same version
> inside and outside chroot (java-1.8.0-openjdk). But I also get output
> as Info: using 'main' from 'Main'
>
> Please help me to solve this problem, thanks so much!
That is only a compiler message, not an error. Please check what the
actual verdict is.
Jaap
> On Sat, Dec 12, 2015 at 10:07 AM, Vũ Linh Nguyễn <linhnv2110@gmail.com
> <mailto:werth@cs.fau.de>> wrote:> <mailto:linhnv2110@gmail.com>> wrote:
>
> Dear Sir,
>
> Thanks for your reply!
>
> -- Now, I install success cgroup, and I also can use 4 judgedaemons
> in my server.
>
> -- I also try your suggest about chroot, I follow this
> link: https://github.com/dozzie/yumbootstrap and install
> yumbootstrap. After that, I also install chroot with:
>
> |# CHROOT=/mnt/chroot/centos-6-chroot # /usr/sbin/yumbootstrap
> --verbose --no-scripts centos-6 $CHROOT # yum --installroot=$CHROOT
> -c $CHROOT/yumbootstrap/yum.conf install gcc gcc-c++ jdk... #
> /usr/sbin/yumbootstrap --verbose --just-scripts $CHROOT|
>
> -- I try to install JDK on chroot, but in my server, I install JDK
> with alternative command, so I don't know how to install it on chroot.
> -- Then, I edit file /judgehost/lib/judge/chroot-startstop.sh
> with: CHROOTORIGINAL='/mnt/chroot/domjudge'. Then I run
> /judgehost/lib/judge/chroot-startstop.sh start
>
> -- Final, I run judgedaemons (4 judgedaemon), I try submitting C
> code => it's CORRECT. Then, I try submitting Java code => it's outpur:
> Info: using 'main' from 'Main'
>
> -- I also try disabling chroot in /domjudge/etc/judgehost-config.php
> , but Java is also output: Info: using 'main' from 'Main'
>
> Can you help me to solve this problem?
>
> Best regard,
>
> Linh
>
> On Fri, Dec 11, 2015 at 7:43 PM, Tobias Werth <werth@cs.fau.de
>
> Hi,
>
> *Vũ Linh Nguyễn <linhnv2110@gmail.com
> <mailto:linhnv2110@gmail.com>> [15/12/10]:
> *---------------------------------------------------------------------------------------------*> > -- Problem 1: I install JDK 8u66 x64 on my server, and I check javac, java is
> > OK, I compiled an example file (hello.java in domjudge/doc/exaples) is OK. But
> > when I submit file in domjudge, judgedaemon run OK, but I receive error with
> > output:
> >
> >
> > Compiling failed with exitcode 1, compiler output:
> > Error occurred during initialization of VM
> > Could not allocate metaspace: 1073741824 bytes
>
> You have to increase the value of MEMRESERVED in the java compile
> script. It may be necessary that you increase the global memory
> limit if
> that's too small. With 64 bit java, it's very difficult to setup
> without
> cgroups. Last time, I checked, I had to use 1.3GB for
> MEMRESERVED with a
> total memory limit of 2GB to make it work.
> But I strongly recommend using cgroups.
>
>
> > --> I don't know what I wrong, I read your Document, and I found out that about
> > chroot, so I disable chroot, then I restart judgedaemon, but it's still not
> > working, I can submit Java file (C, C++ is OK).
> >
> > -- Problem 2: I want to use cgroup, I installed libcgroup-devel. But I don't
> > know what is this:
> >
> > • Edit grub config to add memory cgroup and swap accounting to the boot
> > options. Edit /etc/default/grub and change the default commandline
> > to GRUB_CMDLINE_LINUX_DEFAULT="quiet cgroup_enable=memory swapaccount=1".
> > Then run update-grub and reboot.
> > --> I can't find out /etc/default/grub => I am using CentOS.
>
> Yes, that documentation is a bit debian specific. You have to
> find out
> how to change the kernel command line options on CentOS. As a
> starting
> point read this:
> http://serverfault.com/questions/405558/how-do-i-set-the-default-kernel-parameters-in-centos-for-all-existing-and-future
>
>
> > -- Problem 3: I want to install chroot. But when I run bin/dj_make_chroot =>
> > it's error: Error: No installation directory given.
> > Then I run: bin/dj_make_chroot /home/domjudge/judgehost/chroot amd64, I get
> > notification about install a package (debootstrap), but I get error when
> > install (because this is a Debian package, not for CentOS).
> >
> > Please help me, thanks for your support!
>
> Again, the documentation is a debian specific. However, it does not
> really matter, how you create the chroot. So look for other
> alternatives
> like https://github.com/dozzie/yumbootstrap
>
> Make sure that you install the same java packages inside and
> outside of
> the chroot.
>
> Cheers,
> Tobi
>
>
>
>
> --
> *Nguyễn Vũ Linh - Sói Hoang*
> *
> *
> Software/Website/Game Developer - AI, PTS, Corel, AE Designer
> ......................
> Phone: 0963.203.813
> Website: http://ww-solution.me <http://ww-solution.me/>
> Email: linhnv2110@gmail.com <mailto:linhnv2110@gmail.com> |
> nguyen.vu.linh321@gmail.com <mailto:nguyen.vu.linh321@gmail.com>
> .............................
> Facebook: http://facebook.com/linhnv2110
> Skype: linhnv2110@gmail.com <mailto:linhnv2110@gmail.com>
>
>
>
>
> --
> *---------------------------------------------------------------------------------------------*
> *Nguyễn Vũ Linh - Sói Hoang*
> *
> *
> Software/Website/Game Developer - AI, PTS, Corel, AE Designer
> ......................
> Phone: 0963.203.813
> Website: http://ww-solution.me <http://ww-solution.me/>
> Email: linhnv2110@gmail.com <mailto:linhnv2110@gmail.com> |
> nguyen.vu.linh321@gmail.com <mailto:nguyen.vu.linh321@gmail.com>
> .............................
> Facebook: http://facebook.com/linhnv2110
> Skype: linhnv2110@gmail.com <mailto:linhnv2110@gmail.com>
>
>
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