[ https://issues.apache.org/jira/browse/MAPREDUCE-4730?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13483435#comment-13483435 ]
Vinod Kumar Vavilapalli commented on MAPREDUCE-4730: ---------------------------------------------------- I was thinking that the connection timeouts are unrelated to HADOOP-8942. You are right, AMScalability only runs maps, so there is no chance to uncover this issue. Are these socket timeout exceptions? I remember running into those with gridmix, but never got around to the bottom of that because of more pressing concerns. > AM crashes due to OOM while serving up map task completion events > ----------------------------------------------------------------- > > Key: MAPREDUCE-4730 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-4730 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: applicationmaster, mrv2 > Affects Versions: 0.23.3 > Reporter: Jason Lowe > Assignee: Jason Lowe > Priority: Blocker > Attachments: MAPREDUCE-4730.patch, MAPREDUCE-4730.patch > > > We're seeing a repeatable OOM crash in the AM for a task with around 30000 > maps and 3000 reducers. Details to follow. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira