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https://issues.apache.org/jira/browse/HDFS-6945?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14111920#comment-14111920
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Akira AJISAKA commented on HDFS-6945:
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I propose to add the function to remove the block from {{excessReplicateMap}}
and decrement the counter in {{BlockManager#removeBlock(Block)}} and
{{BlockManager#removeBlockFromMap(Block)}} methods.
Now {{excessReplicateMap}} can become large, which means memory leak.
> ExcessBlocks metric may not be decremented if there are no over replicated
> blocks
> ---------------------------------------------------------------------------------
>
> Key: HDFS-6945
> URL: https://issues.apache.org/jira/browse/HDFS-6945
> Project: Hadoop HDFS
> Issue Type: Bug
> Affects Versions: 2.5.0
> Reporter: Akira AJISAKA
> Labels: metrics
>
> I'm seeing ExcessBlocks metric increases to more than 300K in some clusters,
> however, there are no over-replicated blocks (confirmed by fsck).
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