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https://issues.apache.org/jira/browse/HDFS-1476?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12932837#action_12932837
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Patrick Kling commented on HDFS-1476:
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The findbugs warnings are because of the problem described in MAPREDUCE-2172.
test ant-patch with an empty patch yields 3 findbugs warning and 97 release
audit warning, so this patch does not introduce any new problems.
> listCorruptFileBlocks should be functional while the name node is still in
> safe mode
> ------------------------------------------------------------------------------------
>
> Key: HDFS-1476
> URL: https://issues.apache.org/jira/browse/HDFS-1476
> Project: Hadoop HDFS
> Issue Type: Improvement
> Reporter: Patrick Kling
> Assignee: Patrick Kling
> Attachments: HDFS-1476.2.patch, HDFS-1476.patch
>
>
> This would allow us to detect whether missing blocks can be fixed using Raid
> and if that is the case exit safe mode earlier.
> One way to make listCorruptFileBlocks available before the name node has
> exited from safe mode would be to perform a scan of the blocks map on each
> call to listCorruptFileBlocks to determine if there are any blocks with no
> replicas. This scan could be parallelized by dividing the space of block IDs
> into multiple intervals than can be scanned independently.
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