[
https://issues.apache.org/jira/browse/HDFS-6945?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Akira AJISAKA updated HDFS-6945:
--------------------------------
Summary: BlockManager should remove a block from excessReplicateMap and
decrement ExcessBlocks metric when the block is removed (was:
excessReplicateMap can increase infinitely)
I think the patch is ready for review.
> BlockManager should remove a block from excessReplicateMap and decrement
> ExcessBlocks metric when the block is removed
> ----------------------------------------------------------------------------------------------------------------------
>
> 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
> Assignee: Akira AJISAKA
> Priority: Critical
> Labels: metrics
> Attachments: HDFS-6945.2.patch, HDFS-6945.patch
>
>
> I'm seeing ExcessBlocks metric increases to more than 300K in some clusters,
> however, there are no over-replicated blocks (confirmed by fsck).
> After a further research, I noticed when deleting a block, BlockManager does
> not remove the block from excessReplicateMap or decrement excessBlocksCount.
> Usually the metric is decremented when processing block report, however, if
> the block has been deleted, BlockManager does not remove the block from
> excessReplicateMap or decrement the metric.
> That way the metric and excessReplicateMap can increase infinitely (i.e.
> memory leak can occur).
--
This message was sent by Atlassian JIRA
(v6.3.4#6332)
