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https://issues.apache.org/jira/browse/HBASE-27034?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Work on HBASE-27034 started by fengxianjing.
--------------------------------------------
> NegativeArraySizeException was encountered during compaction
> ------------------------------------------------------------
>
> Key: HBASE-27034
> URL: https://issues.apache.org/jira/browse/HBASE-27034
> Project: HBase
> Issue Type: Bug
> Components: HFile
> Affects Versions: 2.3.4
> Reporter: fengxianjing
> Assignee: fengxianjing
> Priority: Critical
>
>
> {code:java}
> 2022-04-13 12:45:37,122 ERROR [regionserver/xxxxxx:26020-shortCompactions-0]
> regionserver.CompactSplit: Compaction failed
> region=XXX:XXX,002CX21205070934507532021052320210523174923,162
> 8091302516.7d2e05ad63b91843d438d2464a908d49.,
> storeName=7d2e05ad63b91843d438d2464a908d49/info, priority=90,
> startTime=1649825135950
> java.lang.NegativeArraySizeException
> at org.apache.hadoop.hbase.CellUtil.cloneQualifier(CellUtil.java:120)
> at
> org.apache.hadoop.hbase.ByteBufferKeyValue.getQualifierArray(ByteBufferKeyValue.java:112)
> at
> org.apache.hadoop.hbase.CellUtil.getCellKeyAsString(CellUtil.java:1335)
> at
> org.apache.hadoop.hbase.CellUtil.getCellKeyAsString(CellUtil.java:1318)
> at
> org.apache.hadoop.hbase.io.hfile.HFileWriterImpl.getMidpoint(HFileWriterImpl.java:384)
> at
> org.apache.hadoop.hbase.io.hfile.HFileWriterImpl.finishBlock(HFileWriterImpl.java:349)
> at
> org.apache.hadoop.hbase.io.hfile.HFileWriterImpl.checkBlockBoundary(HFileWriterImpl.java:328)
> at
> org.apache.hadoop.hbase.io.hfile.HFileWriterImpl.append(HFileWriterImpl.java:739)
> at
> org.apache.hadoop.hbase.regionserver.StoreFileWriter.append(StoreFileWriter.java:299)
> at
> org.apache.hadoop.hbase.regionserver.compactions.Compactor.performCompaction(Compactor.java:410)
> at
> org.apache.hadoop.hbase.regionserver.compactions.Compactor.compact(Compactor.java:333)
> at
> org.apache.hadoop.hbase.regionserver.compactions.DefaultCompactor.compact(DefaultCompactor.java:65)
> at
> org.apache.hadoop.hbase.regionserver.DefaultStoreEngine$DefaultCompactionContext.compact(DefaultStoreEngine.java:126)
> at
> org.apache.hadoop.hbase.regionserver.HStore.compact(HStore.java:1544)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.compact(HRegion.java:2288)
> at
> org.apache.hadoop.hbase.regionserver.CompactSplit$CompactionRunner.doCompaction(CompactSplit.java:619)
> at
> org.apache.hadoop.hbase.regionserver.CompactSplit$CompactionRunner.run(CompactSplit.java:661)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
> at java.lang.Thread.run(Thread.java:748) {code}
>
> We encounter the exeception above many times. Usually, it will retry and
> compact success next time. But sometime it make _getMidpoint return_ a wrong
> result and then make an abnormal index block as follow
>
> {code:java}
> 068c892d122//LATEST_TIMESTAMP/Maximum/vlen=0/seqid=0
> 1//LATEST_TIMESTAMP/Maximum/vlen=0/seqid=0
> 068c896a6fc6f155beaddab036a4225ef79_12022011420220114205945/info:q/LATEST_TIMESTAMP/Maximum/vlen=0/seqid=0
> {code}
>
> And this index block will lead to an endless loop in
> _org.apache.hadoop.hbase.regionserver.KeyValueHeap#generalizedSeek_
> The cause of this problem is _lastCellOfPreviousBlock_ reference to the cells
> in read path([HBASE-16372|https://issues.apache.org/jira/browse/HBASE-16372])
> I have fixed it and will create a PR for it
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