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Tasks attempting to read from failed hard drive

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Over a week ago a drive failed in one of our data nodes that we have not replaced yet.  Today while a user was attempting to run a get command copy a file out of HDFS he got an error because it was trying to read a block off the failed drive. It then successfully connected to a different data node and then finished. My question is why was the NameNode sending the process to a node that should no longer be listed as having that block due to a failed drive?

$ ll /data/hadoop-data/10
ls: cannot access /data/hadoop-data/10: Input/output error

 

$ hadoop fs -get /data/discovery/<redacted> /home/m9tn/<redacted>
15/05/29 14:21:55 WARN hdfs.BlockReaderFactory: I/O error constructing remote block reader.
java.io.IOException: Got error for OP_READ_BLOCK, self=/<ipaddress redacted>, remote=/<ipaddress redacted>, for file /data/discovery/<redacted>, for pool BP-1211057805-<ipaddress redacted>-1411162331514 block 1076062177_2488147
at org.apache.hadoop.hdfs.RemoteBlockReader2.checkSuccess(RemoteBlockReader2.java:445)
at org.apache.hadoop.hdfs.RemoteBlockReader2.newBlockReader(RemoteBlockReader2.java:410)
at org.apache.hadoop.hdfs.BlockReaderFactory.getRemoteBlockReader(BlockReaderFactory.java:785)
at org.apache.hadoop.hdfs.BlockReaderFactory.getRemoteBlockReaderFromTcp(BlockReaderFactory.java:663)
at org.apache.hadoop.hdfs.BlockReaderFactory.build(BlockReaderFactory.java:327)
at org.apache.hadoop.hdfs.DFSInputStream.blockSeekTo(DFSInputStream.java:574)
at org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:797)
at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:844)
at java.io.DataInputStream.read(DataInputStream.java:100)
at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:84)
at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:52)
at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:112)
at org.apache.hadoop.fs.shell.CommandWithDestination$TargetFileSystem.writeStreamToFile(CommandWithDestination.java:456)
at org.apache.hadoop.fs.shell.CommandWithDestination.copyStreamToTarget(CommandWithDestination.java:382)
at org.apache.hadoop.fs.shell.CommandWithDestination.copyFileToTarget(CommandWithDestination.java:319)
at org.apache.hadoop.fs.shell.CommandWithDestination.processPath(CommandWithDestination.java:254)
at org.apache.hadoop.fs.shell.CommandWithDestination.processPath(CommandWithDestination.java:239)
at org.apache.hadoop.fs.shell.Command.processPaths(Command.java:306)
at org.apache.hadoop.fs.shell.Command.processPathArgument(Command.java:278)
at org.apache.hadoop.fs.shell.CommandWithDestination.processPathArgument(CommandWithDestination.java:234)
at org.apache.hadoop.fs.shell.Command.processArgument(Command.java:260)
at org.apache.hadoop.fs.shell.Command.processArguments(Command.java:244)
at org.apache.hadoop.fs.shell.CommandWithDestination.processArguments(CommandWithDestination.java:211)
at org.apache.hadoop.fs.shell.Command.processRawArguments(Command.java:190)
at org.apache.hadoop.fs.shell.Command.run(Command.java:154)
at org.apache.hadoop.fs.FsShell.run(FsShell.java:287)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
at org.apache.hadoop.fs.FsShell.main(FsShell.java:340)
15/05/29 14:21:55 WARN hdfs.DFSClient: Failed to connect to /<ipaddress redacted> for block, add to deadNodes and continue. java.io.IOException: Got error for OP_READ_BLOCK, self=/<ipaddress redacted>, remote=/<ipaddress redacted>, for file /data/discovery/<redacted>, for pool BP-1211057805-<ipaddress redacted>-1411162331514 block 1076062177_2488147
java.io.IOException: Got error for OP_READ_BLOCK, self=/<ipaddress redacted>, remote=/<ipaddress redacted>, for file /data/discovery/<redacted>, for pool BP-1211057805-10.96.243.40-1411162331514 block 1076062177_2488147
at org.apache.hadoop.hdfs.RemoteBlockReader2.checkSuccess(RemoteBlockReader2.java:445)
at org.apache.hadoop.hdfs.RemoteBlockReader2.newBlockReader(RemoteBlockReader2.java:410)
at org.apache.hadoop.hdfs.BlockReaderFactory.getRemoteBlockReader(BlockReaderFactory.java:785)
at org.apache.hadoop.hdfs.BlockReaderFactory.getRemoteBlockReaderFromTcp(BlockReaderFactory.java:663)
at org.apache.hadoop.hdfs.BlockReaderFactory.build(BlockReaderFactory.java:327)
at org.apache.hadoop.hdfs.DFSInputStream.blockSeekTo(DFSInputStream.java:574)
at org.apache.hadoop.hdfs.DFSInputStream.readWithStrategy(DFSInputStream.java:797)
at org.apache.hadoop.hdfs.DFSInputStream.read(DFSInputStream.java:844)
at java.io.DataInputStream.read(DataInputStream.java:100)
at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:84)
at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:52)
at org.apache.hadoop.io.IOUtils.copyBytes(IOUtils.java:112)
at org.apache.hadoop.fs.shell.CommandWithDestination$TargetFileSystem.writeStreamToFile(CommandWithDestination.java:456)
at org.apache.hadoop.fs.shell.CommandWithDestination.copyStreamToTarget(CommandWithDestination.java:382)
at org.apache.hadoop.fs.shell.CommandWithDestination.copyFileToTarget(CommandWithDestination.java:319)
at org.apache.hadoop.fs.shell.CommandWithDestination.processPath(CommandWithDestination.java:254)
at org.apache.hadoop.fs.shell.CommandWithDestination.processPath(CommandWithDestination.java:239)
at org.apache.hadoop.fs.shell.Command.processPaths(Command.java:306)
at org.apache.hadoop.fs.shell.Command.processPathArgument(Command.java:278)
at org.apache.hadoop.fs.shell.CommandWithDestination.processPathArgument(CommandWithDestination.java:234)
at org.apache.hadoop.fs.shell.Command.processArgument(Command.java:260)
at org.apache.hadoop.fs.shell.Command.processArguments(Command.java:244)
at org.apache.hadoop.fs.shell.CommandWithDestination.processArguments(CommandWithDestination.java:211)
at org.apache.hadoop.fs.shell.Command.processRawArguments(Command.java:190)
at org.apache.hadoop.fs.shell.Command.run(Command.java:154)
at org.apache.hadoop.fs.FsShell.run(FsShell.java:287)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:84)
at org.apache.hadoop.fs.FsShell.main(FsShell.java:340)
15/05/29 14:21:55 INFO hdfs.DFSClient: Successfully connected to /<ipaddress redacted> for BP-1211057805-<ipaddress redacted>-1411162331514:blk_1076062177_2488147

 

 

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