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https://issues.apache.org/jira/browse/HBASE-532?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12587044#action_12587044
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stack commented on HBASE-532:
-----------------------------
There is a hole in our memcache. On flush, the flusher asks the Memcache for
the snapshot to persist. Memcache hands it over and then zeros out the
snapshot. Flusher goes to work but any subsequent gets will not see what was
in snapshot until flusher finishes. Scanners taken out after the flush starts
will never see the edits.
> Odd interaction between HRegion.get, HRegion.deleteAll and compactions
> ----------------------------------------------------------------------
>
> Key: HBASE-532
> URL: https://issues.apache.org/jira/browse/HBASE-532
> Project: Hadoop HBase
> Issue Type: Bug
> Affects Versions: 0.2.0, 0.1.1
> Reporter: Jim Kellerman
> Assignee: stack
> Fix For: 0.2.0, 0.1.2
>
>
> If you apply the patch for HBASE-483 to the 0.1 branch and comment out lines
> 309 and 315 of MetaUtils.java (which force compactions of the root and meta
> regions respectively), TestMergeTool fails. Why forcing compactions makes the
> test succeed is a mystery to me.
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