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https://issues.apache.org/jira/browse/HBASE-10500?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13898295#comment-13898295
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Jonathan Hsieh commented on HBASE-10500:
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lgtm.. +1
> hbck and OOM when BucketCache is enabled
> ----------------------------------------
>
> Key: HBASE-10500
> URL: https://issues.apache.org/jira/browse/HBASE-10500
> Project: HBase
> Issue Type: Bug
> Components: hbck
> Affects Versions: 0.98.0, 0.96.0, 0.99.0
> Reporter: Nick Dimiduk
> Assignee: Nick Dimiduk
> Attachments: HBASE-10500.00.patch
>
>
> Running {{hbck --repair}} when BucketCache is enabled in offheap mode can
> cause OOM. This is apparently because {{bin/hbase}} does not include
> $HBASE_REGIONSERVER_OPTS for hbck. It instantiates an HRegion instance as
> part of HDFSIntegrityFixer.handleHoleInRegionChain. That HRegion initializes
> its CacheConfig, which doesn't have the necessary Direct Memory.
> Possible solutions include:
> - disable blockcache in the config used by hbck when running its repairs
> - include HBASE_REGIONSERVER_OPTS in the HBaseFSCK startup arguments
> I'm leaning toward the former because it's possible that hbck is run on a
> host with different hardware profile as the RS.
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