JobTracker hangs for long periods of time
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Key: HADOOP-5285
URL: https://issues.apache.org/jira/browse/HADOOP-5285
Project: Hadoop Core
Issue Type: Bug
Components: mapred
Affects Versions: 0.20.0
Reporter: Vinod K V
Priority: Blocker
Fix For: 0.20.0
On one of the larger clusters of 2000 nodes, JT hanged quite often, sometimes
for times in the order of 10-15 minutes and once for one and a half hours(!).
The stack trace shows that JobInProgress.obtainTaskCleanupTask() is waiting for
lock on JobInProgress object which JobInProgress.initTasks() is holding for a
long time waiting for DFS operations.
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