Yu Sun created HBASE-17020:
------------------------------
Summary: keylen in midkey() should be 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
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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