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https://issues.apache.org/jira/browse/HBASE-6737?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13555342#comment-13555342
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Sergey Shelukhin commented on HBASE-6737:
-----------------------------------------
[~nkeywal] Hi, is it possible to repro the former case, or get more logs? From
cursory look it appears that the writers are only closed after some attempt to
stop writer threads in HLogSplitter. Were there errors stopping writer threads?
> NullPointerException at regionserver.wal.SequenceFileLogWriter.append
> ---------------------------------------------------------------------
>
> Key: HBASE-6737
> URL: https://issues.apache.org/jira/browse/HBASE-6737
> Project: HBase
> Issue Type: Bug
> Components: master
> Affects Versions: 0.96.0
> Reporter: nkeywal
> Assignee: Sergey Shelukhin
> Priority: Critical
>
> Real cluster, scenario in HBASE-5843.
> There are two exceptions, I create a single JIRA with both of them.
> 2012-09-04 18:14:49,264 FATAL
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter: WriterThread-1 Got
> while writing log entry to log
> java.io.IOException: java.lang.NullPointerException
> at
> org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter.append(SequenceFileLogWriter.java:229)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter$WriterThread.writeBuffer(HLogSplitter.java:949)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter$WriterThread.doRun(HLogSplitter.java:919)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter$WriterThread.run(HLogSplitter.java:891)
> Caused by: java.lang.NullPointerException
> at
> org.apache.hadoop.io.SequenceFile$Writer.checkAndWriteSync(SequenceFile.java:1026)
> at
> org.apache.hadoop.io.SequenceFile$Writer.append(SequenceFile.java:1068)
> at
> org.apache.hadoop.io.SequenceFile$Writer.append(SequenceFile.java:1035)
> at
> org.apache.hadoop.hbase.regionserver.wal.SequenceFileLogWriter.append(SequenceFileLogWriter.java:226)
> ... 3 more
> 2012-09-04 18:15:52,546 ERROR
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter: Error in log splitting
> write thread
> java.lang.reflect.UndeclaredThrowableException
> at $Proxy7.getFileInfo(Unknown Source)
> at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:875)
> at
> org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:513)
> at org.apache.hadoop.fs.FileSystem.exists(FileSystem.java:768)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.getRegionSplitEditsPath(HLogSplitter.java:559)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.createWAP(HLogSplitter.java:974)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.access$800(HLogSplitter.java:82)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter$OutputSink.getWriterAndPath(HLogSplitter.java:1309)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter$WriterThread.writeBuffer(HLogSplitter.java:942)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter$WriterThread.doRun(HLogSplitter.java:919)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter$WriterThread.run(HLogSplitter.java:891)
> Caused by: java.lang.reflect.InvocationTargetException
> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at org.apache.hadoop.hbase.fs.HFileSystem$1.invoke(HFileSystem.java:261)
> ... 11 more
> Caused by: java.io.IOException: Call to BOX1/192.168.15.5:9000 failed on
> local exception: java.nio.channels.ClosedByInterruptException
> at org.apache.hadoop.ipc.Client.wrapException(Client.java:1107)
> at org.apache.hadoop.ipc.Client.call(Client.java:1075)
> at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
> at $Proxy7.getFileInfo(Unknown Source)
> at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source)
> at
> sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
> at java.lang.reflect.Method.invoke(Method.java:597)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:82)
> at
> org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59)
> at $Proxy7.getFileInfo(Unknown Source)
> ... 15 more
> Caused by: java.nio.channels.ClosedByInterruptException
> at
> java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:184)
> at sun.nio.ch.SocketChannelImpl.write(SocketChannelImpl.java:341)
> at
> org.apache.hadoop.net.SocketOutputStream$Writer.performIO(SocketOutputStream.java:55)
> at
> org.apache.hadoop.net.SocketIOWithTimeout.doIO(SocketIOWithTimeout.java:142)
> at
> org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:146)
> at
> org.apache.hadoop.net.SocketOutputStream.write(SocketOutputStream.java:107)
> at
> java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:65)
> at java.io.BufferedOutputStream.flush(BufferedOutputStream.java:123)
> at java.io.DataOutputStream.flush(DataOutputStream.java:106)
> at org.apache.hadoop.ipc.Client$Connection.sendParam(Client.java:783)
> at org.apache.hadoop.ipc.Client.call(Client.java:1051)
> ... 23 more
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