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https://issues.apache.org/jira/browse/HBASE-17020?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Yu Sun updated HBASE-17020:
---------------------------
Comment: was deleted
(was: ok, i will prepare patch for other branches)
> keylen in midkey() dont computed correctly
> ------------------------------------------
>
> Key: HBASE-17020
> URL: https://issues.apache.org/jira/browse/HBASE-17020
> Project: HBase
> Issue Type: Bug
> Components: HFile
> Reporter: Yu Sun
> Assignee: Yu Sun
> Attachments: HBASE-17020-v1.patch, HBASE-17020-v2.patch,
> HBASE-17020-v2.patch
>
>
> in CellBasedKeyBlockIndexReader.midkey():
> {code}
> ByteBuff b = midLeafBlock.getBufferWithoutHeader();
> int numDataBlocks = b.getIntAfterPosition(0);
> int keyRelOffset = b.getIntAfterPosition(Bytes.SIZEOF_INT *
> (midKeyEntry + 1));
> int keyLen = b.getIntAfterPosition(Bytes.SIZEOF_INT * (midKeyEntry
> + 2)) - keyRelOffset;
> {code}
> the local varible keyLen get this should be total length of:
> SECONDARY_INDEX_ENTRY_OVERHEAD + firstKey.length;
> the code is:
> {code}
> void add(byte[] firstKey, long blockOffset, int onDiskDataSize,
> long curTotalNumSubEntries) {
> // Record the offset for the secondary index
> secondaryIndexOffsetMarks.add(curTotalNonRootEntrySize);
> curTotalNonRootEntrySize += SECONDARY_INDEX_ENTRY_OVERHEAD
> + firstKey.length;
> {code}
> when the midkey last entry of a leaf-level index block, this may throw:
> {quote}
> 2016-10-01 12:27:55,186 ERROR [MemStoreFlusher.0]
> regionserver.MemStoreFlusher: Cache flusher failed for entry [flush region
> pora_6_item_feature,0061:,1473838922457.12617bc4ebbfd171018bf96ac9bdd2a7.]
> java.lang.ArrayIndexOutOfBoundsException
> at
> org.apache.hadoop.hbase.util.ByteBufferUtils.copyFromBufferToArray(ByteBufferUtils.java:936)
> at
> org.apache.hadoop.hbase.nio.SingleByteBuff.toBytes(SingleByteBuff.java:303)
> at
> org.apache.hadoop.hbase.io.hfile.HFileBlockIndex$CellBasedKeyBlockIndexReader.midkey(HFileBlockIndex.java:419)
> at
> org.apache.hadoop.hbase.io.hfile.HFileReaderImpl.midkey(HFileReaderImpl.java:1519)
> at
> org.apache.hadoop.hbase.regionserver.StoreFile$Reader.midkey(StoreFile.java:1520)
> at
> org.apache.hadoop.hbase.regionserver.StoreFile.getFileSplitPoint(StoreFile.java:706)
> at
> org.apache.hadoop.hbase.regionserver.DefaultStoreFileManager.getSplitPoint(DefaultStoreFileManager.java:126)
> at
> org.apache.hadoop.hbase.regionserver.HStore.getSplitPoint(HStore.java:1983)
> at
> org.apache.hadoop.hbase.regionserver.ConstantFamilySizeRegionSplitPolicy.getSplitPoint(ConstantFamilySizeRegionSplitPolicy.java:77)
> at
> org.apache.hadoop.hbase.regionserver.HRegion.checkSplit(HRegion.java:7756)
> at
> org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:513)
> at
> org.apache.hadoop.hbase.regionserver.MemStoreFlusher.flushRegion(MemStoreFlusher.java:471)
> at
> org.apache.hadoop.hbase.regionserver.MemStoreFlusher.access$800(MemStoreFlusher.java:75)
> at
> org.apache.hadoop.hbase.regionserver.MemStoreFlusher$FlushHandler.run(MemStoreFlusher.java:259)
> at java.lang.Thread.run(Thread.java:756)
> {quote}
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