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https://issues.apache.org/jira/browse/MAPREDUCE-6657?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15284987#comment-15284987
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Haibo Chen commented on MAPREDUCE-6657:
---------------------------------------

Updated the patch with Junping's comments on adding a static method for 
this.nn.getRole() + " still not started". 

> job history server can fail on startup when NameNode is in start phase
> ----------------------------------------------------------------------
>
>                 Key: MAPREDUCE-6657
>                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-6657
>             Project: Hadoop Map/Reduce
>          Issue Type: Bug
>          Components: jobhistoryserver
>            Reporter: Haibo Chen
>            Assignee: Haibo Chen
>         Attachments: mapreduce6657.001.patch, mapreduce6657.002.patch, 
> mapreduce6657.003.patch, mapreduce6657.004.patch, mapreduce6657.005.patch, 
> mapreduce6657.006.patch
>
>
> Job history server will try to create a history directory in HDFS on startup. 
> When NameNode is in safe mode, it will keep retrying for a configurable time 
> period.  However, it should also keeps retrying if the name node is in start 
> state. Safe mode does not happen until the NN is out of the startup phase. 
> A RetriableException with the text "NameNode still not started" is thrown 
> when the NN is in its internal service startup phase. We should add the check 
> for this specific exception in isBecauseSafeMode() to account for that.



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