[ https://issues.apache.org/jira/browse/MAPREDUCE-1308?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Allen Wittenauer resolved MAPREDUCE-1308. ----------------------------------------- Resolution: Cannot Reproduce stale. > reduce tasks stall and are eventually killed > -------------------------------------------- > > Key: MAPREDUCE-1308 > URL: https://issues.apache.org/jira/browse/MAPREDUCE-1308 > Project: Hadoop Map/Reduce > Issue Type: Bug > Components: tasktracker > Environment: 20-node cluster, 8 cores per machine, 32GB memory, > Fedora Linux > Reporter: Brian Karlak > > We recently migrated our 0.19.2 cluster from Gentoo Linux to Fedora Linux. > Everything was running smoothly before, but now about 5%-10% of our jobs have > at least one reduce task that stalls out and is eventually killed with the > message: > Task attempt_200912102211_1648_r_000009_0 failed to report status for > 6003 seconds. Killing! > The task is then re-launched and completes successfully, usually in a couple > of minutes. > This is problematic because our scheduled Hadoop jobs now take an extra > hour-and-a-half to run (6000 seconds). > There are no indications in the logs that anything is amiss. The task > starts, a small amount of the copy/shuffle runs, and then nothing is else is > heard from the task until it is killed. I will attach the relevant parts of > the TaskTracker logs in the comments. -- This message was sent by Atlassian JIRA (v6.2#6252)