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Feng Yuan edited comment on YARN-2904 at 3/7/17 3:49 AM: --------------------------------------------------------- In my humble opinion,Task process leak but some unknowable reason(YARN-6276),and result to when deleteCgroup() will get os panic(this issue),so i add the relation here.[~jlowe] was (Author: feng yuan): In my humble opinion,Task process leak but some unknowable reason(YARN-6276),and result to when deleteCgroup() will get os panic(this issue),so i add the relation here. > Use linux cgroups to enhance container tear down > ------------------------------------------------ > > Key: YARN-2904 > URL: https://issues.apache.org/jira/browse/YARN-2904 > Project: Hadoop YARN > Issue Type: Improvement > Components: nodemanager > Affects Versions: 2.6.0 > Reporter: Nathan Roberts > > If we are launching yarn containers within cgroups, linux provides some > guarantees that can help completely tear down a container. Specifically, > linux guarantees that tasks can't escape a cgroup. We can use this fact to > tear down a yarn container without leaking tasks. > Today, a SIGTERM is sent to the session (normally lead by bash). When the > session leader exits, the LCE sees this and assumes all resources have been > given back to the system. This is not guaranteed. Example: YARN-2809 > implements a workaround that is only necessary because tasks are still > lingering within the cgroup when the nodemanager attempts to delete it. -- This message was sent by Atlassian JIRA (v6.3.15#6346) --------------------------------------------------------------------- To unsubscribe, e-mail: yarn-issues-unsubscr...@hadoop.apache.org For additional commands, e-mail: yarn-issues-h...@hadoop.apache.org