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Posted to issues@hbase.apache.org by "stack (JIRA)" <ji...@apache.org> on 2019/05/17 21:05:00 UTC

[jira] [Commented] (HBASE-21981) MMaped bucket cache IOEngine does not work with persistence

    [ https://issues.apache.org/jira/browse/HBASE-21981?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16842572#comment-16842572 ] 

stack commented on HBASE-21981:
-------------------------------

Moving out of 2.1.5

> 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, 2.3.0, 2.0.6, 2.2.1, 2.1.6
>
>         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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