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Ming Ma commented on MAPREDUCE-5044: ------------------------------------ This is quite useful. Can we get this and YARN-1515 in 2.4.0 release? > Have AM trigger jstack on task attempts that timeout before killing them > ------------------------------------------------------------------------ > > Key: MAPREDUCE-5044 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-5044 > Project: Hadoop Map/Reduce > Issue Type: Improvement > Components: mr-am > Affects Versions: 2.1.0-beta > Reporter: Jason Lowe > Assignee: Gera Shegalov > Attachments: MAPREDUCE-5044.v01.patch, MAPREDUCE-5044.v02.patch, > MAPREDUCE-5044.v03.patch, MAPREDUCE-5044.v04.patch, Screen Shot 2013-11-12 at > 1.05.32 PM.png, Screen Shot 2013-11-12 at 1.06.04 PM.png > > > When an AM expires a task attempt it would be nice if it triggered a jstack > output via SIGQUIT before killing the task attempt. This would be invaluable > for helping users debug their hung tasks, especially if they do not have > shell access to the nodes. -- This message was sent by Atlassian JIRA (v6.2#6252)