Hi Linh,

That looks strange, especially the randomness of this behaviour.

Does user id 7806 correspond to a user?

In your source directory, what is the contents of etc/runguard-config.h? In particular what is the value of "VALID_USERS"?

Could you send a zip file of a judging directory where this error occurred, and also the later rejudging? These are directories of the form judgings/<judgehost>/endpoint-default/cX-sYYY-jZZZ under your judgehost installation directory.

Could you also send the logfile of the judgehost where this occurred?

Best, Jaap

On 08-05-16 13:31, Vũ Linh Nguyễn wrote:

Dear Sir,

I am using Domjudge to set up ACM Contest in my school, everything is OK.

I can submit Java, C, C++ very well.

I also install cgroup and using chroot.

But sometime, I received error like this when I submit any code, just somtimes this happened, and when I rejudge them, I received CORRECT response.

Error text:

Compiling failed with exitcode 255, compiler output: /domjudge/judgehost/bin/runguard: illegal user specified: 7806 Try `/domjudge/judgehost/bin/runguard --help' for more information.

Can you show me how to solve this problem?

And I also run domjudge without root accout, I run it with an account with root privillege!

Thanks. I'm looking forward for your help!

Best regard,

Linh

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