[JIRA] [master-slave] (JENKINS-6188) When a build is aborted, Hudson does not kill all the descendant processes recursively to avoid run-away processes on the Slave Build machines.

Wed, 01 May 2013 21:04:01 -0700

Tully Foote commented on Bug JENKINS-6188

We've had the same issue using pbuilder for several years. We're running 1.513 now, but we've been seeing this issue for a long time.

Jobs end up with orphaned process trees like this:

root 32018 0.0 0.0 53788 1524 ? S 08:50 0:00 sudo pbuilder execute --basetgz /var/cache/pbuilder/jenkins_tools.precise.am
root 32019 0.0 0.1 12824 1812 ? S 08:50 0:00 _ /bin/bash /usr/sbin/pbuilder execute --basetgz /var/cache/pbuilder/jenki
root 10649 0.0 0.0 9424 1256 ? S 08:50 0:00 _ /bin/bash -ex /runscript doc
root 10656 0.1 1.3 75456 24148 ? S 08:50 0:36 | _ python /home/rosbuild/hudson/workspace/doc-fuerte-tum/jenkins_sc
root 9009 0.0 0.0 9768 1692 ? S 16:55 0:00 | _ bash -c source /opt/ros/fuerte/setup.bash && export PYTHONPA
root 9026 1.1 1.3 61092 22904 ? S 16:55 0:00 | _ /usr/bin/python /usr/local/bin/rosdoc_lite /home/rosbuil
root 9027 52.0 18.6 350096 327324 ? D 16:55 0:43 | _ doxygen /tmp/tmpwC1LwG
root 9365 0.0 0.0 4308 352 ? S 16:56 0:00 _ sleep 5s

Where the pbuilder process used to be a subprocess of the script being run by jenkins.

However you can see that jenkins is in a separate process tree:
root 747 0.0 0.0 49948 244 ? Ss Apr16 0:01 /usr/sbin/sshd -D
root 12760 0.0 0.0 92224 372 ? Ss Apr30 0:00 _ sshd: rosbuild [priv]
rosbuild 12904 0.0 0.0 92408 528 ? S Apr30 0:50 | _ sshd: rosbuild@notty
rosbuild 12918 0.0 0.0 12296 228 ? Ss Apr30 0:00 | _ bash -c cd '/home/rosbuild/hudson' && java -jar slave.jar
rosbuild 12919 0.1 4.4 1598760 77928 ? Sl Apr30 1:55 | _ java -jar slave.jar
root 9084 0.0 0.2 90164 4052 ? Ss 16:56 0:00 _ sshd: root@pts/3
root 9281 0.5 0.3 24056 5300 pts/3 Ss 16:56 0:00 _ -bash
root 9366 0.0 0.0 18128 1200 pts/3 R+ 16:56 0:00 _ ps auxf

We're running a linux master and slaves with SSH Slaves plugin 0.23
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