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https://issues.apache.org/jira/browse/HBASE-10829?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13965680#comment-13965680
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Cosmin Lehene commented on HBASE-10829:
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I can't find this issue in the 0.98.1 release notes. Perhaps fix version should
be 0.98.2?
> Flush is skipped after log replay if the last recovered edits file is skipped
> -----------------------------------------------------------------------------
>
> Key: HBASE-10829
> URL: https://issues.apache.org/jira/browse/HBASE-10829
> Project: HBase
> Issue Type: Bug
> Reporter: Enis Soztutar
> Assignee: Enis Soztutar
> Priority: Critical
> Fix For: 0.98.1, 0.99.0, 0.96.3
>
> Attachments: hbase-10829_v1.patch, hbase-10829_v2.patch,
> hbase-10829_v3.patch
>
>
> We caught this in an extended test run where IntegrationTestBigLinkedList
> failed with some missing keys.
> The problem is that HRegion.replayRecoveredEdits() would return -1 if all the
> edits in the log file is skipped, which is true for example if the log file
> only contains a single compaction record (HBASE-2231) or somehow the edits
> cannot be applied (column family deleted, etc).
> The callee, HRegion.replayRecoveredEditsIfAny() only looks for the last
> returned seqId to decide whether a flush is necessary or not before opening
> the region, and discarding replayed recovered edits files.
> Therefore, if the last recovered edits file is skipped but some edits from
> earlier recovered edits files are applied, the mandatory flush before opening
> the region is skipped. If the region server dies after this point before a
> flush, the edits are lost.
> This is important to fix, though the sequence of events are super rare for a
> production cluster.
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