hadoop-common-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From Nigel Daley <nda...@yahoo-inc.com>
Subject Re: [jira] Commented: (HADOOP-969) deadlock in job tracker RetireJobs
Date Fri, 02 Feb 2007 20:41:54 GMT
Diregard Hadoop QA last comment.  The patch couldn't be applied  
because the patch has already been committed.

On Feb 2, 2007, at 12:37 PM, Hadoop QA (JIRA) wrote:

>
>     [ https://issues.apache.org/jira/browse/HADOOP-969? 
> page=com.atlassian.jira.plugin.system.issuetabpanels:comment- 
> tabpanel#action_12469861 ]
>
> Hadoop QA commented on HADOOP-969:
> ----------------------------------
>
> -1, because the patch command could not apply the latest attachment  
> (http://issues.apache.org/jira/secure/attachment/12350238/jt- 
> dead.patch) as a patch to trunk revision r502726. Please note that  
> this message is automatically generated and may represent a problem  
> with the automation system and not the patch.
>
>> 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.
>


Mime
View raw message