Hadoop常见错误及解决办法汇总

转载自http://www.sharpcloud.cn/thread-4927-1-1.html

错误一：java.io.IOException: Incompatible clusterIDs 时常出现在namenode重新格式化之后
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2014-04-29 14:32:53,877 FATAL org.apache.hadoop.hdfs.server.datanode.DataNode: Initialization failed for block pool Block pool BP-1480406410-192.168.1.181-1398701121586 (storage id DS-167510828-192.168.1.191-50010-1398750515421) service to hadoop-master/192.168.1.181:9000
java.io.IOException: Incompatible clusterIDs in /data/dfs/data: namenode clusterID = CID-d1448b9e-da0f-499e-b1d4-78cb18ecdebb; datanode clusterID = CID-ff0faa40-2940-4838-b321-98272eb0dee3! k( U+ r: ]& [: ?1 K2 F
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:391)
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:191)
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:219). M0 W1 J. r* E+ R0 p) X
        at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:837)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:808)9 `& G! A1 k/ @7 m+ J6 K( e* O% m! a
        at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:280)
        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:222)
        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:664); ]) Z3 I. t! @% }" h/ X  V. k
        at java.lang.Thread.run(Thread.java:722)2 m/ y; f6 ^5 A) }
2014-04-29 14:32:53,885 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Ending block pool service for: Block pool BP-1480406410-192.168.1.181-1398701121586 (storage id DS-167510828-192.168.1.191-50010-1398750515421) service to hadoop-master/192.168.1.181:9000
2014-04-29 14:32:53,889 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Removed Block pool BP-1480406410-192.168.1.181-1398701121586 (storage id DS-167510828-192.168.1.191-50010-1398750515421)& r7 a! [& s" A- z+ v
2014-04-29 14:32:55,897 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Exiting Datanode


原因：每次namenode format会重新创建一个namenodeId,而data目录包含了上次format时的id,namenode format清空了namenode下的数据,但是没有清空datanode下的数据,导致启动时失败,所要做的就是每次fotmat前,清空data下的所有目录.
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解决办法：停掉集群，删除问题节点的data目录下的所有内容。即hdfs-site.xml文件中配置的dfs.data.dir目录。重新格式化namenode。

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另一个更省事的办法：先停掉集群，然后将datanode节点目录/dfs/data/current/VERSION中的修改为与namenode一致即可。

错误二：org.apache.hadoop.yarn.exceptions.YarnException: Unauthorized request to start container

14/04/29 02:45:07 INFO mapreduce.Job: Job job_1398704073313_0021 failed with state FAILED due to: Application application_1398704073313_0021 failed 2 times due to Error launching appattempt_1398704073313_0021_000002. Got exception: org.apache.hadoop.yarn.exceptions.YarnException: Unauthorized request to start container. 7 S- u0 e$ J; }& O
This token is expired. current time is 1398762692768 found 1398711306590' j% p: ^9 {( V( Y/ U; g0 }/ b9 G4 b
        at sun.reflect.GeneratedConstructorAccessor30.newInstance(Unknown Source)
        at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.lang.reflect.Constructor.newInstance(Constructor.java:525)
        at org.apache.hadoop.yarn.api.records.impl.pb.SerializedExceptionPBImpl.instantiateException(SerializedExceptionPBImpl.java:152)! p* v  f4 f' e+ K+ V) A
        at org.apache.hadoop.yarn.api.records.impl.pb.SerializedExceptionPBImpl.deSerialize(SerializedExceptionPBImpl.java:106)
        at org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher.launch(AMLauncher.java:122)
        at org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher.run(AMLauncher.java:249), J; J9 f/ \- ]" i$ `6 ^6 [
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)2 P0 e+ l! [8 A% j) B, L  @) `
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
        at java.lang.Thread.run(Thread.java:722); O* O5 b' @' D% q2 \7 s
. Failing the application./ R9 A; `5 Z* O% h
14/04/29 02:45:07 INFO mapreduce.Job: Counters: 0+ z8 c' c# X* L9 `9 A
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问题原因：namenode,datanode时间同步问题
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解决办法：多个datanode与namenode进行时间同步，在每台服务器执行：ntpdate time.nist.gov，确认时间同步成功。
最好在每台服务器的 /etc/crontab 中加入一行：
0 2 * * * root ntpdate time.nist.gov && hwclock -w

错误：java.net.SocketTimeoutException: 480000 millis timeout while waiting for channel to be ready for write
2014-05-06 14:28:09,386 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: hadoop-datanode1:50010ataXceiver error processing READ_BLOCK operation  src: /192.168.1.191:48854 dest: /192.168.1.191:50010
java.net.SocketTimeoutException: 480000 millis timeout while waiting for channel to be ready for write. ch : java.nio.channels.SocketChannel[connected local=/192.168.1.191:50010 remote=/192.168.1.191:48854]7 S* A9 Y% r3 K* n5 R0 ^
        at org.apache.hadoop.net.SocketIOWithTimeout.waitForIO(SocketIOWithTimeout.java:246)
        at org.apache.hadoop.net.SocketOutputStream.waitForWritable(SocketOutputStream.java:172)+ Q3 p0 B7 \' g9 o7 S. p8 O
        at org.apache.hadoop.net.SocketOutputStream.transferToFully(SocketOutputStream.java:220)
        at org.apache.hadoop.hdfs.server.datanode.BlockSender.sendPacket(BlockSender.java:546). y9 D% c9 `( U1 @
        at org.apache.hadoop.hdfs.server.datanode.BlockSender.sendBlock(BlockSender.java:710)2 o5 i7 g* W- f" ^
        at org.apache.hadoop.hdfs.server.datanode.DataXceiver.readBlock(DataXceiver.java:340)' A; q& X1 ?7 d9 }  h. {
        at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opReadBlock(Receiver.java:101)7 H, M3 Y, U2 k9 }$ ]
        at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:65), T7 u& G7 t  Y7 g6 _
        at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:221)
        at java.lang.Thread.run(Thread.java:722)% x* l: k; S$ d7 k4 R9 K
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原因：IO超时5 Z8 a  r: A5 Z, f9 _4 I" D8 c+ u5 Y
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解决方法：
修改hadoop配置文件hdfs-site.xml，增加dfs.datanode.socket.write.timeout和dfs.socket.timeout两个属性的设置。
   
        dfs.datanode.socket.write.timeout+ }9 p1 |# {. d0 ^
        6000000
    ( w% k% ]. ?& H. ]% m, C/ T' O0 M

   
        dfs.socket.timeout; ]- f3 n3 r( a; M+ I4 \" u! c( |( A
        60000001 u) h& E$ ?/ w1 m: k! @2 e! l
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注意: 超时上限值以毫秒为单位。0表示无限制。

错误：DataXceiver error processing WRITE_BLOCK operation% N8 C+ p) ^* S$ D" e8 Y, |
2014-05-06 15:21:30,378 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: hadoop-datanode1:50010ataXceiver error processing WRITE_BLOCK operation  src: /192.168.1.193:34147 dest: /192.168.1.191:50010
java.io.IOException: Premature EOF from inputStream
        at org.apache.hadoop.io.IOUtils.readFully(IOUtils.java:194)
        at org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.doReadFully(PacketReceiver.java:213)' {+ ~: }/ R( L6 B7 J
        at org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.doRead(PacketReceiver.java:134)6 r) ?/ P. }9 i4 \% T. u
        at org.apache.hadoop.hdfs.protocol.datatransfer.PacketReceiver.receiveNextPacket(PacketReceiver.java:109)* Y, z' P6 f6 W9 @
        at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receivePacket(BlockReceiver.java:435)
        at org.apache.hadoop.hdfs.server.datanode.BlockReceiver.receiveBlock(BlockReceiver.java:693)
        at org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:569). w. z1 \) A+ [# H# f
        at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java:115)* Q. v, b+ _0 K  u+ H3 q# r. B
        at org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:68)
        at org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:221)
        at java.lang.Thread.run(Thread.java:722)

原因：文件操作超租期，实际上就是data stream操作过程中文件被删掉了。9 c( ?5 f* l1 Z5 t' g) }  p
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解决办法：
修改hdfs-site.xml （针对2.x版本，1.x版本属性名应该是：dfs.datanode.max.xcievers）：0 O* C9 E+ n' B4 z' H# G) }8 x7 C
 
        dfs.datanode.max.transfer.threads 
        8192 * ?' D! `2 P# k

拷贝到各datanode节点并重启datanode即可

错误：java.io.IOException: Failed to replace a bad datanode on the existing pipeline due to no more good datanodes being available to try.( l/ b9 S3 h; L' b2 E- a 2014-05-07 12:21:41,820 WARN [Thread-115] org.apache.hadoop.mapreduce.v2.app.MRAppMaster: Graceful stop failed& R$ y  {7 T1 c' ]) L org.apache.hadoop.yarn.exceptions.YarnRuntimeException: java.io.IOException: Failed to replace a bad datanode on the existing pipeline due to no more good datanodes being available to try. (Nodes: current=[192.168.1.191:50010, 192.168.1.192:50010], original=[192.168.1.191:50010, 192.168.1.192:50010]). The current failed datanode replacement policy is DEFAULT, and a client may configure this via 'dfs.client.block.write.replace-datanode-on-failure.policy' in its configuration.         at org.apache.hadoop.mapreduce.jobhistory.JobHistoryEventHandler.handleEvent(JobHistoryEventHandler.java:514)         at org.apache.hadoop.mapreduce.jobhistory.JobHistoryEventHandler.serviceStop(JobHistoryEventHandler.java:332)         at org.apache.hadoop.service.AbstractService.stop(AbstractService.java:221)         at org.apache.hadoop.service.ServiceOperations.stop(ServiceOperations.java:52)1 p) Q) w4 F# k; h         at org.apache.hadoop.service.ServiceOperations.stopQuietly(ServiceOperations.java:80)         at org.apache.hadoop.service.CompositeService.stop(CompositeService.java:159)- u3 j; h: q+ |         at org.apache.hadoop.service.CompositeService.serviceStop(CompositeService.java:132)         at org.apache.hadoop.service.AbstractService.stop(AbstractService.java:221)         at org.apache.hadoop.mapreduce.v2.app.MRAppMaster.shutDownJob(MRAppMaster.java:548)" a6 n% L' G8 x6 U% V         at org.apache.hadoop.mapreduce.v2.app.MRAppMaster$JobFinishEventHandler$1.run(MRAppMaster.java:599) Caused by: java.io.IOException: Failed to replace a bad datanode on the existing pipeline due to no more good datanodes being available to try. (Nodes: current=[192.168.1.191:50010, 192.168.1.192:50010], original=[192.168.1.191:50010, 192.168.1.192:50010]). The current failed datanode replacement policy is DEFAULT, and a client may configure this via 'dfs.client.block.write.replace-datanode-on-failure.policy' in its configuration.% x4 E9 @+ y% y- G# y. L2 s7 Z3 r         at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.findNewDatanode(DFSOutputStream.java:860)' \4 q# Y0 y! V5 j0 T! C: L! J% I$ i         at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.addDatanode2ExistingPipeline(DFSOutputStream.java:925)         at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.setupPipelineForAppendOrRecovery(DFSOutputStream.java:1031)         at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.processDatanodeError(DFSOutputStream.java:823)2 j' [$ M5 p( l% T* e2 B         at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:475) 原因：无法写入；我的环境中有3个datanode，备份数量设置的是3。在写操作时，它会在pipeline中写3个机器。默认replace-datanode-on-failure.policy是DEFAULT,如果系统中的datanode大于等于3，它会找另外一个datanode来拷贝。目前机器只有3台，因此只要一台datanode出问题，就一直无法写入成功。 $ A, _+ B" V; u7 r8 r 解决办法：修改hdfs-site.xml文件，添加或者修改如下两项：   dfs.client.block.write.replace-datanode-on-failure.enable; ?3 H/ X! P8 I; h. S   true! A- x% |8 x6 T! f6 p* K1 C1 I   dfs.client.block.write.replace-datanode-on-failure.policy, y( z1 e3 y" u; Y- d, e/ ?   NEVER+ H" Q+ k9 d; O! e! A) \ 对于dfs.client.block.write.replace-datanode-on-failure.enable，客户端在写失败的时候，是否使用更换策略，默认是true没有问题。 对于，dfs.client.block.write.replace-datanode-on-failure.policy，default在3个或以上备份的时候，是会尝试更换结点尝试写入datanode。而在两个备份的时候，不更换datanode，直接开始写。对于3个datanode的集群，只要一个节点没响应写入就会出问题，所以可以关掉。

错误：org.apache.hadoop.util.DiskChecker$DiskErrorException: Could not find any valid local directory for 
14/05/08 18:24:59 INFO mapreduce.Job: Task Id : attempt_1399539856880_0016_m_000029_2, Status : FAILED
Error: org.apache.hadoop.util.DiskChecker$DiskErrorException: Could not find any valid local directory for attempt_1399539856880_0016_m_000029_2_spill_0.out
        at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:398)4 r, L- O8 @2 _4 F$ _% [
        at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:150)
        at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:131)! z& h' }0 }, n+ j# ]) d
        at org.apache.hadoop.mapred.YarnOutputFiles.getSpillFileForWrite(YarnOutputFiles.java:159)' t: G( A  V& j; |3 a+ d
        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1573)5 z. ~/ w% E+ q
        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1467). t' b$ |7 Y$ M+ E4 r5 H
        at org.apache.hadoop.mapred.MapTask$NewOutputCollector.close(MapTask.java:699)1 L) K# z2 ~7 F
        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:769)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:339)
        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:162)* X' @9 [; {9 |4 C$ i! Z
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:415)3 _  e5 s8 H; U  D, q- j+ d9 ]
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491)
        at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:157)

Container killed by the ApplicationMaster.4 J& g0 Z3 w' P4 S- U

原因：两种可能，hadoop.tmp.dir或者data目录存储空间不足。
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解决办法：看了一下我的dfs状态，data使用率不到40%，所以推测是hadoop.tmp.dir空间不足，导致无法创建Jog临时文件。查看core-site.xml发现没有配置hadoop.tmp.dir，因此使用的是默认的/tmp目录，在这目录一旦服务器重启数据就会丢失，因此需要修改。添加：

hadoop.tmp.dir/ D& l1 M, a& V! g$ q# _: p
/data/tmp+ C. c8 w/ B/ j+ ~' r0 B- \, y+ w

然后重新格式化：hadoop namenode -format+ m# u, [& ~4 G, M/ R
重启。

2014-06-19 10:00:32,181 INFO [org.apache.hadoop.mapred.MapTask] - Ignoring exception during close for org.apache.hadoop.mapred.MapTask$NewOutputCollector@17bda0f2
java.io.IOException: Spill failed: ]$ F3 O( E# Q5 a
        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.checkSpillException(MapTask.java:1540)
        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.flush(MapTask.java:1447)9 _% O9 ]( k9 j1 R* y0 Y- w, F
        at org.apache.hadoop.mapred.MapTask$NewOutputCollector.close(MapTask.java:699). t# w& c, x9 E0 B' F
        at org.apache.hadoop.mapred.MapTask.closeQuietly(MapTask.java:1997)
        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:773)% E$ W# A! ]. X& d
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:339)7 P! U) B- {2 G7 d
        at org.apache.hadoop.mapred.LocalJobRunner$Job$MapTaskRunnable.run(LocalJobRunner.java:235)
        at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:471)
        at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:334)
        at java.util.concurrent.FutureTask.run(FutureTask.java:166)5 w: a  j6 L! A- J- g! |5 L
        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)/ t! Q3 G8 Z) K4 e
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)* i, }3 L7 Z0 L, Z% {, Q
        at java.lang.Thread.run(Thread.java:722)
Caused by: org.apache.hadoop.util.DiskChecker$DiskErrorException: Could not find any valid local directory for output/spill0.out
        at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:398)
        at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:150)1 }, O- E4 |* S) K- h* z" w! Y( m
        at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:131)& r% A( h, }/ K. Y& C" R/ P
        at org.apache.hadoop.mapred.MROutputFiles.getSpillFileForWrite(MROutputFiles.java:146)
        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1573)
        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.access$900(MapTask.java:852)
        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer$SpillThread.run(MapTask.java:1510)" M, o$ V# P' R3 A

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错误原因：本地磁盘空间不足非hdfs (我是在myeclipse中调试程序，本地tmp目录占满). p6 F8 d$ O+ S
解决办法：清理、增加空间

2014-06-23 10:21:01,479 INFO [IPC Server handler 3 on 45207] org.apache.hadoop.mapred.TaskAttemptListenerImpl: Progress of TaskAttempt attempt_1403488126955_0002_m_000000_0 is : 0.308017162014-06-23 10:21:01,512 FATAL [IPC Server handler 2 on 45207] org.apache.hadoop.mapred.TaskAttemptListenerImpl: Task: attempt_1403488126955_0002_m_000000_0 - exited : java.io.IOException: Spill failed        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.checkSpillException(MapTask.java:1540)        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:1063)        at org.apache.hadoop.mapred.MapTask$NewOutputCollector.write(MapTask.java:691)        at org.apache.hadoop.mapreduce.task.TaskInputOutputContextImpl.write(TaskInputOutputContextImpl.java:89)        at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.write(WrappedMapper.java:112)        at com.mediadc.hadoop.MediaIndex$SecondMapper.map(MediaIndex.java:180)        at com.mediadc.hadoop.MediaIndex$SecondMapper.map(MediaIndex.java:1)        at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:763)        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:339)        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:162)        at java.security.AccessController.doPrivileged(Native Method)        at javax.security.auth.Subject.doAs(Subject.java:415)        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491)        at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:157)Caused by: org.apache.hadoop.util.DiskChecker$DiskErrorException: Could not find any valid local directory for attempt_1403488126955_0002_m_000000_0_spill_53.out        at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:398)        at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:150)        at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:131)        at org.apache.hadoop.mapred.YarnOutputFiles.getSpillFileForWrite(YarnOutputFiles.java:159)        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1573)        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.access$900(MapTask.java:852)        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer$SpillThread.run(MapTask.java:1510)2014-06-23 10:21:01,513 INFO [IPC Server handler 2 on 45207] org.apache.hadoop.mapred.TaskAttemptListenerImpl: Diagnostics report from attempt_1403488126955_0002_m_000000_0: Error: java.io.IOException: Spill failed        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.checkSpillException(MapTask.java:1540)        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:1063)        at org.apache.hadoop.mapred.MapTask$NewOutputCollector.write(MapTask.java:691)        at org.apache.hadoop.mapreduce.task.TaskInputOutputContextImpl.write(TaskInputOutputContextImpl.java:89)        at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.write(WrappedMapper.java:112)        at com.mediadc.hadoop.MediaIndex$SecondMapper.map(MediaIndex.java:180)        at com.mediadc.hadoop.MediaIndex$SecondMapper.map(MediaIndex.java:1)        at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:763)        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:339)        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:162)        at java.security.AccessController.doPrivileged(Native Method)        at javax.security.auth.Subject.doAs(Subject.java:415)        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491)        at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:157)Caused by: org.apache.hadoop.util.DiskChecker$DiskErrorException: Could not find any valid local directory for attempt_1403488126955_0002_m_000000_0_spill_53.out        at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:398)        at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:150)        at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:131)        at org.apache.hadoop.mapred.YarnOutputFiles.getSpillFileForWrite(YarnOutputFiles.java:159)        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1573)        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.access$900(MapTask.java:852)        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer$SpillThread.run(MapTask.java:1510)2014-06-23 10:21:01,514 INFO [AsyncDispatcher event handler] org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl: Diagnostics report from attempt_1403488126955_0002_m_000000_0: Error: java.io.IOException: Spill failed        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.checkSpillException(MapTask.java:1540)        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.collect(MapTask.java:1063)        at org.apache.hadoop.mapred.MapTask$NewOutputCollector.write(MapTask.java:691)        at org.apache.hadoop.mapreduce.task.TaskInputOutputContextImpl.write(TaskInputOutputContextImpl.java:89)        at org.apache.hadoop.mapreduce.lib.map.WrappedMapper$Context.write(WrappedMapper.java:112)        at com.mediadc.hadoop.MediaIndex$SecondMapper.map(MediaIndex.java:180)        at com.mediadc.hadoop.MediaIndex$SecondMapper.map(MediaIndex.java:1)        at org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:145)        at org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:763)        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:339)        at org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:162)        at java.security.AccessController.doPrivileged(Native Method)        at javax.security.auth.Subject.doAs(Subject.java:415)        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491)        at org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:157)Caused by: org.apache.hadoop.util.DiskChecker$DiskErrorException: Could not find any valid local directory for attempt_1403488126955_0002_m_000000_0_spill_53.out        at org.apache.hadoop.fs.LocalDirAllocator$AllocatorPerContext.getLocalPathForWrite(LocalDirAllocator.java:398)        at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:150)        at org.apache.hadoop.fs.LocalDirAllocator.getLocalPathForWrite(LocalDirAllocator.java:131)        at org.apache.hadoop.mapred.YarnOutputFiles.getSpillFileForWrite(YarnOutputFiles.java:159)        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.sortAndSpill(MapTask.java:1573)        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer.access$900(MapTask.java:852)        at org.apache.hadoop.mapred.MapTask$MapOutputBuffer$SpillThread.run(MapTask.java:1510)2014-06-23 10:21:01,516 INFO [AsyncDispatcher event handler] org.apache.hadoop.mapreduce.v2.app.job.impl.TaskAttemptImpl: attempt_1403488126955_0002_m_000000_0 TaskAttempt Transitioned from RUNNING to FAIL_CONTAINER_CLEANUP  B7 q6 z2 `% L( `8 Q% ]" y
错误很明显，磁盘空间不足，但郁闷的是，进各节点查看，磁盘空间使用不到40%，还有很多空间。

郁闷很长时间才发现，原来有个map任务运行时输出比较多，运行出错前，硬盘空间一路飙升，直到100%不够时报错。随后任务执行失败，释放空间，把任务分配给其它节点。正因为空间被释放，因此虽然报空间不足的错误，但查看当时磁盘还有很多剩余空间。