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https://issues.apache.org/jira/browse/HBASE-14281?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14708580#comment-14708580
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Lars Hofhansl commented on HBASE-14281:
---------------------------------------
(not sure how it got assigned to me... assigned it back to Michael)
> ArrayIndexOutOfBoundsException in CellComparator#getMinimumMidpointArray,
> part 2
> --------------------------------------------------------------------------------
>
> Key: HBASE-14281
> URL: https://issues.apache.org/jira/browse/HBASE-14281
> Project: HBase
> Issue Type: Bug
> Components: regionserver
> Affects Versions: 1.0.0, 1.0.1, 1.0.2
> Reporter: Michael Rose
> Assignee: Michael Rose
> Attachments: 14281-v1.patch
>
>
> Follow-on issue for HBASE-13329: CellComparator#getMinimumMidpointArray seems
> to have had a necessary change omitted and the patch only covered one of the
> two places diffIdx could overflow the short.
> For some background, we ran into the HBASE-13329 issue where a flush would
> cause a regionserver abort. After abort, the region in question would almost
> indefinitely sit in the FAILED_OPEN state. Applying the patch from
> HBASE-13329 didn't solve the issue, but I noticed a comment in that issue
> which applied the same change in CellComparator#getMinimumMidpointArray, but
> the change was omitted from the attached patch.
> RS abort for reference:
> slave3.xxx.xxx.xxx,60020,1440131603772: Replay of WAL required. Forcing
> server shutdown
> org.apache.hadoop.hbase.DroppedSnapshotException: region:
> deduplication,P\xDFt\x10\x053e73ceff5a2717d2ba76887ea21a2a8e353d1372\xFE,1438362391124.2bb6a602be6b1bfcea0508af4ba42235.
> at
> org.apache.hadoop.hbase.regionserver.HRegion.internalFlushCacheAndCommit(HRegion.java:2243)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1972)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.internalFlushcache(HRegion.java:1935)
> at org.apache.hadoop.hbase.regionserver.HRegion.flushcache(HRegion.java:1833)
> at
> org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:452)
> at
> org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:413)
> at
> org.apache.hadoop.hbase.regionserver.MemStoreFlusher.access$800(MemStoreFlusher.java:70)
> at
> org.apache.hadoop.hbase.regionserver.MemStoreFlusher$FlushHandler.run(MemStoreFlusher.java:229)
> at java.lang.Thread.run(Thread.java:745)
> Caused by: java.lang.NegativeArraySizeException
> at
> org.apache.hadoop.hbase.CellComparator.getMinimumMidpointArray(CellComparator.java:494)
> at org.apache.hadoop.hbase.CellComparator.getMidpoint(CellComparator.java:448)
> at
> org.apache.hadoop.hbase.io.hfile.HFileWriterV2.finishBlock(HFileWriterV2.java:165)
> at
> org.apache.hadoop.hbase.io.hfile.HFileWriterV2.checkBlockBoundary(HFileWriterV2.java:146)
> at
> org.apache.hadoop.hbase.io.hfile.HFileWriterV2.append(HFileWriterV2.java:263)
> at
> org.apache.hadoop.hbase.regionserver.StoreFile$Writer.append(StoreFile.java:949)
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