[ https://issues.apache.org/jira/browse/HADOOP-969?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Doug Cutting updated HADOOP-969: -------------------------------- Resolution: Fixed Status: Resolved (was: Patch Available) I just committed this. Thanks, Owen! > 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. -- This message is automatically generated by JIRA. - You can reply to this email to add a comment to the issue online.