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https://issues.apache.org/jira/browse/HDFS-9540?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15052966#comment-15052966
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Kihwal Lee commented on HDFS-9540:
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bq. IMO, NO, since this is not any update on filesystem, but just marking the
block as corrupt.
Agreed. It's like block reports, which is processed while in safe mode under
the write lock.
> Handle SafeModeException in ReportBadBlockAction#reportTo
> ---------------------------------------------------------
>
> Key: HDFS-9540
> URL: https://issues.apache.org/jira/browse/HDFS-9540
> Project: Hadoop HDFS
> Issue Type: Bug
> Reporter: Yongjun Zhang
> Assignee: Yongjun Zhang
>
> BPServiceActor#processQueueMessages() tries to execute the
> ReportBadBlockAction#reportTo(..) and on any exception, it will add back to
> queue.
> For StandbyExceptoin, this caused HDFS-7916, that a request kept being added
> back to the queue while it should not.
> HDFS-7916 solution treats all exceptions wrapped by RemoteException the same,
> including StandbyException. That is, when RemoteException is caught, the
> request is not added back to the queue.
> This solved the StandbyException issue reported in HDFS-7916, but the side
> effect is, it does not add the request back to the queue for
> SafeModeException wrapper by RemoteException, which appears to be incorrect.
> Thanks [~vinayrpet] and [~kihwal] for the discussion in HDFS-7916.
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