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From "Allan Yang (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HBASE-17482) mvcc mechanism failed when using mvccPreAssign
Date Wed, 18 Jan 2017 07:34:26 GMT

    [ https://issues.apache.org/jira/browse/HBASE-17482?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15827546#comment-15827546
] 

Allan Yang commented on HBASE-17482:
------------------------------------

the failed test org.apache.hadoop.hbase.regionserver.TestHRegion.testWritesWhileRollWriter
and org.apache.hadoop.hbase.regionserver.TestHRegion.testFlushCacheWhileScanning are passed
locally

> mvcc mechanism failed when using mvccPreAssign
> ----------------------------------------------
>
>                 Key: HBASE-17482
>                 URL: https://issues.apache.org/jira/browse/HBASE-17482
>             Project: HBase
>          Issue Type: Bug
>    Affects Versions: 2.0..
>            Reporter: Allan Yang
>            Assignee: Allan Yang
>            Priority: Critical
>         Attachments: HBASE-17482.patch, HBASE-17482.v2.patch
>
>
> If mvccPreAssign and ASYNC_WAL is used, then cells may have been commited to memstore
before append thread can stamp seqid to them. The unit test shows everything.



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