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https://issues.apache.org/jira/browse/HBASE-13601?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Abhishek Singh Chouhan updated HBASE-13601:
-------------------------------------------
Fix Version/s: 0.98.13
> Connection leak during log splitting
> ------------------------------------
>
> Key: HBASE-13601
> URL: https://issues.apache.org/jira/browse/HBASE-13601
> Project: HBase
> Issue Type: Bug
> Affects Versions: 0.98.10
> Reporter: Abhishek Singh Chouhan
> Assignee: Abhishek Singh Chouhan
> Fix For: 0.98.13
>
> Attachments: HBASE-13601-0.98.patch
>
>
> Ran into an issue where Region server died with the following exception
> {noformat}
> 2015-04-29 17:10:11,856 WARN [nector@0.0.0.0:60030] mortbay.log - EXCEPTION
> java.io.IOException: Too many open files
> at sun.nio.ch.ServerSocketChannelImpl.accept0(Native Method)
> at
> sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:241)
> at
> org.mortbay.jetty.nio.SelectChannelConnector$1.acceptChannel(SelectChannelConnector.java:75)
> at
> org.mortbay.io.nio.SelectorManager$SelectSet.doSelect(SelectorManager.java:686)
> at
> org.mortbay.io.nio.SelectorManager.doSelect(SelectorManager.java:192)
> at
> org.mortbay.jetty.nio.SelectChannelConnector.accept(SelectChannelConnector.java:124)
> at
> org.mortbay.jetty.AbstractConnector$Acceptor.run(AbstractConnector.java:708)
> at
> org.mortbay.thread.QueuedThreadPool$PoolThread.run(QueuedThreadPool.java:582)
> {noformat}
> Realized that all the tcp sockets on the system were used out due to the
> regionserver trying to split the log and failing multiple times and leaving a
> connection open -
> {noformat}
> java.io.IOException: Got error for OP_READ_BLOCK, self=/10..99.3:50695,
> remote=/10.232.99.36:50010, for file
> /hbase/WALs/host1,60020,1425930917890-splitting/host1%2C60020%2C1425930917890.1429358890944,
> for pool BP-181199659-10.232.99.2-1411124363096 block 1074497051_756497
> at
> org.apache.hadoop.hdfs.RemoteBlockReader2.checkSuccess(RemoteBlockReader2.java:432)
> at
> org.apache.hadoop.hdfs.RemoteBlockReader2.newBlockReader(RemoteBlockReader2.java:397)
> at
> org.apache.hadoop.hdfs.BlockReaderFactory.getRemoteBlockReader(BlockReaderFactory.java:786)
> at
> org.apache.hadoop.hdfs.BlockReaderFactory.getRemoteBlockReaderFromTcp(BlockReaderFactory.java:665)
> at
> org.apache.hadoop.hdfs.BlockReaderFactory.build(BlockReaderFactory.java:325)
> at
> org.apache.hadoop.hdfs.DFSInputStream.blockSeekTo(DFSInputStream.java:567)
> at
> org.apache.hadoop.hdfs.DFSInputStream.seekToNewSource(DFSInputStream.java:1446)
> at
> org.apache.hadoop.hdfs.DFSInputStream.readBuffer(DFSInputStream.java:769)
> at
> org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:799)
> at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:840)
> at java.io.DataInputStream.read(DataInputStream.java:100)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogFactory.createReader(HLogFactory.java:124)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogFactory.createReader(HLogFactory.java:91)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.getReader(HLogSplitter.java:660)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.getReader(HLogSplitter.java:569)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.splitLogFile(HLogSplitter.java:282)
> at
> org.apache.hadoop.hbase.regionserver.wal.HLogSplitter.splitLogFile(HLogSplitter.java:225)
> at
> org.apache.hadoop.hbase.regionserver.SplitLogWorker$1.exec(SplitLogWorker.java:143)
> at
> org.apache.hadoop.hbase.regionserver.handler.HLogSplitterHandler.process(HLogSplitterHandler.java:82)
> at
> org.apache.hadoop.hbase.executor.EventHandler.run(EventHandler.java:128)
> at
> java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
> at
> java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
> at java.lang.Thread.run(Thread.java:745)
> {noformat}
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