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https://issues.apache.org/jira/browse/HADOOP-969?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Owen O'Malley updated HADOOP-969:
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Status: Patch Available (was: Open)
> deadlock in job tracker RetireJobs
> ----------------------------------
>
> Key: HADOOP-969
> URL: https://issues.apache.org/jira/browse/HADOOP-969
> Project: Hadoop
> Issue Type: Bug
> Components: mapred
> Reporter: Owen O'Malley
> Assigned To: Owen O'Malley
> Priority: Critical
> Fix For: 0.11.0
>
> Attachments: jt-dead.patch
>
>
> The JobTracker deadlocks because RetireJobs grabs locks in the wrong order.
> The call stacks look like:
> "IPC Server handler 5 on 50020":
> at
> org.apache.hadoop.mapred.JobTracker.getNewTaskForTaskTracker(JobTracker.java:1108)
> - waiting to lock <0x74487a80> (a java.util.Vector)
> - locked <0x744874b0> (a org.apache.hadoop.mapred.JobTracker)
> at org.apache.hadoop.mapred.JobTracker.heartbeat(JobTracker.java:992)
> - locked <0x744874b0> (a org.apache.hadoop.mapred.JobTracker)
> at sun.reflect.GeneratedMethodAccessor4.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:585)
> at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:337)
> at org.apache.hadoop.ipc.Server$Handler.run(Server.java:538)
> "retireJobs":
> at
> org.apache.hadoop.mapred.JobTracker.removeJobTasks(JobTracker.java:782)
> - waiting to lock <0x744874b0> (a org.apache.hadoop.mapred.JobTracker)
> at org.apache.hadoop.mapred.JobTracker.access$300(JobTracker.java:42)
> at
> org.apache.hadoop.mapred.JobTracker$RetireJobs.run(JobTracker.java:312)
> - locked <0x74487bb0> (a java.util.ArrayList)
> - locked <0x74487a80> (a java.util.Vector)
> - locked <0x74487a58> (a java.util.TreeMap)
> at java.lang.Thread.run(Thread.java:595)
> Found 1 deadlock.
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