CodeRunner: help!!! jobe server cannot run: cannot start `sh': Resource temporarily unavailable

Dear Richard:

my moodle website is : https://mood.nbpt.edu.cn

your coderunner is wonderful, I install it in a VMware on centos 8.0.1095, it's running well, and have no problem.

but，yesterday, I setup coderunner in a real computer, the jobe server cannot run， when I click check button, I only get this result:

and other information of my pc:

# docker version

Client:

Version: 18.06.3-ce

API version: 1.38

Go version: go1.10.3

Git commit: d7080c1

Built: Wed Feb 20 02:26:51 2019

OS/Arch: linux/amd64

Experimental: false

Server:

Engine:

Version: 18.06.3-ce

API version: 1.38 (minimum version 1.12)

Go version: go1.10.3

Git commit: d7080c1

Built: Wed Feb 20 02:28:17 2019

OS/Arch: linux/amd64

Experimental: false

# docker images

REPOSITORY TAG IMAGE ID CREATED SIZE

trampgeek/jobeinabox latest 90b74aaa92fd 14 months ago 1.53GB

# docker ps

CONTAINER ID IMAGE COMMAND CREATED STATUS PORTS NAMES

b0c51bfd1a3d trampgeek/jobeinabox:latest "/usr/sbin/apache2ct…" 37 minutes ago Up 37 minutes 10.211.16.10:1975->80/tcp jobe

# groups

root docker

this is all information of the pc environment, how do jobe server can not work ? How can I do , please help me , thanks very much!

Re: help!!! jobe server cannot run: cannot start `sh': Resource temporarily unavailable

de Richard Lobb - domingo, 3 de noviembre de 2019, 21:11

Hi Zonggen

It appears the job is being disallowed because the resources required for it exceed the limits set by the runguard sandbox. But I don't know why or how that is happening. I haven't seen this problem before.

Can you confirm please that the problem occurs with all questions, even (say) a trivial python3 question?

Can you also check that the problem does not occur if you switch across to the testing jobe server (jobe2.cosc.canterbury.ac.nz - use the default values in the CodeRunner settings admin page).

Have you tried removing the jobeinabox container (docker rm jobe) and rerunning it?

Richard

Re: help!!! jobe server cannot run: cannot start `sh': Resource temporarily unavailable

de Zonggen Zeng - lunes, 4 de noviembre de 2019, 07:53

yes ,all your suggestions I have tried, problems is there!!! I'm tired!!!

In windows 10 + Vmware-centos 8 , the same environment like real pc, coderunner is running very well.

use you jobe2.cosc.canterbury.ac.nz , alse have no problem:

can you present me a good key for use temperorily ? have no times limit ???? till you slove this problem?
my moodle site is https://mood.nbpt.edu.cn/

I'll solve this problem these days!!!!

I'm very sad now!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Re: help!!! jobe server cannot run: cannot start `sh': Resource temporarily unavailable

de Richard Lobb - lunes, 4 de noviembre de 2019, 21:53

Hi Zonggen

I'm sorry you're tired and stressed but please realise that you're using free unsupported open-source software. I'm happy to help users with problems provided (a) it doesn't take too much of my time, for which I'm not paid, and (b) users understand that the problems are theirs, not mine (even if there is a bug in my code, although I don't think that's the case here).

So, with that in mind, let's look more carefully at your problem ...

You have CodeRunner questions that work with the jobe2 server but not with your jobe server, which is a jobeinabox docker container. I just fired up a new clean JobeInAbox as documented here and it ran just fine. Plenty of other people are using it too, so I don't think the problem is with the docker image itself. If I understand correctly, you had a Jobe server running fine before in a VM but when you run it on a real PC it is failing. Since it is apparently failing due to resource limitations, it seems the docker environment in which you're running JobeInABox must be imposing some limits on the container's resource use. I don't know why this is happening, unless you've explicitly imposed such limits yourself or are running in some sort of managed container environment like Kubernetes.

My suggestion is that you first verify the nature of the problem by downloading the Jobe test program 'testsubmit.py' from the git repository here, edit it to reference your own jobeinabox server, and make sure it fails in the expected way (i.e. on just about anything except GET languages).

Assuming that's the case, you should then try running jobeinabox from other simpler docker environments. For example, you could try docker in Windows (if you're currently running it on a Linux host) or vice versa.

If you need another Jobe server as a stopgap measure, I suggest you use a VM from a company like Digital Ocean or Amazon. There is a youtube walkthrough of the process here.

Good luck

Richard

Re: help!!! jobe server cannot run: cannot start `sh': Resource temporarily unavailable

de Zonggen Zeng - jueves, 7 de noviembre de 2019, 22:19

I found the code of error:

in docker container:

/var/www/html/jobe/application/libraries/../../runguard/runguard.c

line 891:

but i cannot how to repair it

maybe it can leak which is wrong in centos 8.0.1905 for docker...

runguard.c

Re: help!!! jobe server cannot run: cannot start `sh': Resource temporarily unavailable

de Richard Lobb - viernes, 8 de noviembre de 2019, 08:27

I'd recommend not using Centos for a Jobe server - it has lots of extra security features that can interfere with Jobe, and it also tends to use older versions of software (e.g. old buggy versions of docker). Have you tried running JobeInABox in a different OS/Docker, as I suggested last time?

If you wish to persist with Centos, the following link might be relevant: https://success.docker.com/article/how-to-reserve-resource-temporarily-unavailable-errors-due-to-tasksmax-setting. I note that the issue it describes, which is very similar to yours, was resolved by Docker EE 17.06.2-ee-7. What version of Docker are you running?

Re: help!!! jobe server cannot run: cannot start `sh': Resource temporarily unavailable

de Zonggen Zeng - viernes, 8 de noviembre de 2019, 14:48

# uname -a
Linux localhost.localdomain 4.18.0-80.el8.x86_64 #1 SMP Tue Jun 4 09:19:46 UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

# rpm -q centos-release
centos-release-8.0-0.1905.0.9.el8.x86_64

# docker version
Client: Docker Engine - Community
Version: 19.03.4
API version: 1.39 (downgraded from 1.40)
Go version: go1.12.10
Git commit: 9013bf583a
Built: Fri Oct 18 15:52:22 2019
OS/Arch: linux/amd64
Experimental: false

Server: Docker Engine - Community
Engine:
Version: 18.09.1
API version: 1.39 (minimum version 1.12)
Go version: go1.10.6
Git commit: 4c52b90
Built: Wed Jan 9 19:06:30 2019
OS/Arch: linux/amd64
Experimental: false

========================
I will try the URL you send me today.

my moodle site: https://mood.nbpt.edu.cn

Re: help!!! jobe server cannot run: cannot start `sh': Resource temporarily unavailable

de Zonggen Zeng - lunes, 11 de noviembre de 2019, 03:46

Dear Richard Lobb:
Today, I reinstalled My　moodle server use CentOS-7-x86_64-DVD-1908.iso, then installed docker-ce-19 ,then installed jobe， and have no problem, jobe runed very well.

so I guess maybe the 4.18 kernel of centos8 is not match docker!!!

centos 7 's kernel is 3.10, it is frendly to jobe!!!

my problem is ok now, thanks for your coderunner !!! it's a very wonderful moodle plugs. you are great!!!