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https://issues.apache.org/jira/browse/HBASE-16578?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15508209#comment-15508209
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huaxiang sun commented on HBASE-16578:
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Thanks [[email protected]]! When I have time, I will probably debug more
about the original testing case to see why it randomly fails.
> Mob data loss after mob compaction and normal compcation
> --------------------------------------------------------
>
> Key: HBASE-16578
> URL: https://issues.apache.org/jira/browse/HBASE-16578
> Project: HBase
> Issue Type: Bug
> Components: mob
> Affects Versions: 2.0.0
> Reporter: huaxiang sun
> Assignee: Jingcheng Du
> Attachments: TestMobCompaction.java, TestMobCompaction.java
>
>
> StoreFileScanners on MOB cells rely on the scannerOrder to find the latest
> cells after compaction. The value of scannerOrder is assigned by the order of
> maxSeqId of StoreFile, and this maxSeqId is valued only after the reader of
> the StoreFile is created.
> In {{StoreFileScanner.getScannersForStoreFiles}}, the StoreFiles are sorted
> before the readers are created and at that time the maxSeqId for each file is
> -1 (the default value). This will lead to a chaos in scanners on MOB cells.
> We need to create readers just before the sorting in the method
> {{StoreFileScanner.getScannersForStoreFiles}}.
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