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  1. HBase
  2. HBASE-27034

NegativeArraySizeException was encountered during compaction

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Details

    • Bug
    • Status: In Progress
    • Critical
    • Resolution: Unresolved
    • 2.3.4
    • None
    • Compaction, HFile
    • None

    Description

       

      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)

       

      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

       

      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

       

      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)

      I have fixed it and will create a PR for it

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        Issue Links

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          Web Link GitHub Pull Request #4430

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              fengxianjing fengxianjing
              fengxianjing fengxianjing
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              Dates

                Created:
                Updated: