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https://issues.apache.org/jira/browse/HBASE-21981?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Anoop Sam John updated HBASE-21981:
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Attachment: HBASE-21981.patch
> MMaped bucket cache IOEngine does not work with persistence
> -----------------------------------------------------------
>
> Key: HBASE-21981
> URL: https://issues.apache.org/jira/browse/HBASE-21981
> Project: HBase
> Issue Type: Bug
> Components: BucketCache
> Affects Versions: 2.1.3
> Reporter: ramkrishna.s.vasudevan
> Assignee: Anoop Sam John
> Priority: Major
> Fix For: 3.0.0, 2.2.0, 2.0.5, 2.3.0, 2.1.4
>
> Attachments: HBASE-21981.patch, HBASE-21981.patch
>
>
> The MMap based IOEngines does not retrieve the data back if
> 'hbase.bucketcache.persistent.path' is enabled. FileIOEngine works fine but
> only the FileMMapEngine has this problem.
> The reason is that we don't get the byte buffers in the proper order while
> reading back from the file in case of persistence.
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