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https://issues.apache.org/jira/browse/HBASE-10447?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13891126#comment-13891126
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Lars Hofhansl commented on HBASE-10447:
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Probably needs to go into 0.96. [~stack]
> Memstore flusher scans storefiles also when the scanner heap gets reset
> -----------------------------------------------------------------------
>
> Key: HBASE-10447
> URL: https://issues.apache.org/jira/browse/HBASE-10447
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.0, 0.99.0
> Reporter: ramkrishna.s.vasudevan
> Assignee: ramkrishna.s.vasudevan
> Priority: Blocker
> Fix For: 0.98.0, 0.99.0
>
> Attachments: HBASE-10447_0.98.patch, HBASE-10447_trunk.patch,
> HBASE-10447_trunk_1.patch
>
>
> See the mail thread
> http://osdir.com/ml/general/2014-01/msg61294.html
> In case of flush we create a memstore flusher which in turn creates a
> StoreScanner backed by a Single ton MemstoreScanner.
> But this scanner also registers for any updates in the reader in the HStore.
> Is this needed?
> If this happens then any update on the reader may nullify the current heap
> and the entire Scanner Stack is reset, but this time with the other scanners
> for all the files that satisfies the last top key. So the flush that happens
> on the memstore holds the storefile scanners also in the heap that was
> recreated but originally the intention was to create a scanner on the
> memstore alone.
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