Grokbase Groups HBase dev April 2010
FAQ
Split doesn't handle IOExceptions when creating new region reference files
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Key: HBASE-2461
URL: https://issues.apache.org/jira/browse/HBASE-2461
Project: Hadoop HBase
Issue Type: Bug
Components: regionserver
Reporter: Todd Lipcon


I was testing an HDFS patch which had a bug in it, so it happened to throw an NPE during a split with the following trace:

2010-04-16 19:18:20,727 ERROR org.apache.hadoop.hbase.regionserver.CompactSplitThread: Compaction failed for region TestTable,-1945465867<1271449232310>,1271453785648
java.lang.NullPointerException
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.enqueueCurrentPacket(DFSClient.java:3124)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.flushInternal(DFSClient.java:3220)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.closeInternal(DFSClient.java:3306)
at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.close(DFSClient.java:3255)
at org.apache.hadoop.fs.FSDataOutputStream$PositionCache.close(FSDataOutputStream.java:61)
at org.apache.hadoop.fs.FSDataOutputStream.close(FSDataOutputStream.java:86)
at org.apache.hadoop.fs.FileSystem.createNewFile(FileSystem.java:560)
at org.apache.hadoop.hbase.util.FSUtils.create(FSUtils.java:95)
at org.apache.hadoop.hbase.io.Reference.write(Reference.java:129)
at org.apache.hadoop.hbase.regionserver.StoreFile.split(StoreFile.java:498)
at org.apache.hadoop.hbase.regionserver.HRegion.splitRegion(HRegion.java:682)
at org.apache.hadoop.hbase.regionserver.CompactSplitThread.split(CompactSplitThread.java:162)
at org.apache.hadoop.hbase.regionserver.CompactSplitThread.run(CompactSplitThread.java:95)

After that, my region was gone, any further writes to it would fail.

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postedApr 17, '10 at 2:40a
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