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From "Yu Li (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HBASE-16931) Setting cell's seqId to zero in compaction flow might cause RS down.
Date Fri, 28 Oct 2016 02:33:58 GMT

     [ https://issues.apache.org/jira/browse/HBASE-16931?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Yu Li updated HBASE-16931:
--------------------------
    Fix Version/s: 1.3.0

Plan to commit to branch-1.3 if no objections in another 12 hours and close this JIRA, thanks.

> Setting cell's seqId to zero in compaction flow might cause RS down.
> --------------------------------------------------------------------
>
>                 Key: HBASE-16931
>                 URL: https://issues.apache.org/jira/browse/HBASE-16931
>             Project: HBase
>          Issue Type: Bug
>          Components: regionserver
>    Affects Versions: 2.0.0
>            Reporter: binlijin
>            Assignee: binlijin
>            Priority: Critical
>             Fix For: 2.0.0, 1.3.0, 1.4.0, 1.2.4, 1.1.8
>
>         Attachments: HBASE-16931-master.patch, HBASE-16931.branch-1.patch, HBASE-16931.branch-1.v2.patch,
HBASE-16931_master_v2.patch, HBASE-16931_master_v3.patch, HBASE-16931_master_v4.patch, HBASE-16931_master_v5.patch
>
>
> Compactor#performCompaction
>       do {
>         hasMore = scanner.next(cells, scannerContext);
>         // output to writer:
>         for (Cell c : cells) {
>           if (cleanSeqId && c.getSequenceId() <= smallestReadPoint) {
>             CellUtil.setSequenceId(c, 0);
>           }
>           writer.append(c);
>         }
>         cells.clear();
>       } while (hasMore);
> scanner.next will choose at most "hbase.hstore.compaction.kv.max" kvs, the last cell
still reference by StoreScanner.prevCell, so if cleanSeqId is called when the scanner.next
call StoreScanner.checkScanOrder may throw exception and cause regionserver down.



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