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hadoop异常“could only be replicated to 0 nodes, instead of 1” 解决

简介: 异常分析  1、“could only be replicated to 0 nodes, instead of 1”异常 (1)异常描述 上面配置都正确无误,并且,已经完成了如下运行步骤: [root@localhost hadoop-0.

异常分析

 1、“could only be replicated to 0 nodes, instead of 1”异常

(1)异常描述

上面配置都正确无误,并且,已经完成了如下运行步骤:

[root@localhost hadoop-0.20.0]# bin/hadoop namenode -format

 

[root@localhost hadoop-0.20.0]# bin/start-all.sh

这时,看到5个进程jobtracker、tasktracker、namenode、datanode、secondarynamenode已经给出了启动成功信息,但是运行jps命令查看进程的时候,发现并不是那样,如下所示:

4281 Jps
4007 SecondaryNameNode
3771 NameNode

可见,只有两个进程启动成功了,其它的并没有成功,如果你再继续向下执行,准备运行wordcount实例之前执行上传文件的命令:

[root@localhost hadoop-0.20.0]# bin/hadoop fs -put input in

现在就会抛出一堆异常了,如下所示:

10/08/02 15:36:04 INFO hdfs.DFSClient: org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/root/in/LICENSE.txt could only be replicated to 0 nodes, instead of 1
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1256)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:422)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953)

        at org.apache.hadoop.ipc.Client.call(Client.java:739)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220)
        at $Proxy0.addBlock(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        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 $Proxy0.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:2873)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2755)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:2046)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2232)

10/08/02 15:36:04 WARN hdfs.DFSClient: NotReplicatedYetException sleeping /user/root/in/LICENSE.txt retries left 4
10/08/02 15:36:04 INFO hdfs.DFSClient: org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/root/in/LICENSE.txt could only be replicated to 0 nodes, instead of 1
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1256)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:422)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953)

        at org.apache.hadoop.ipc.Client.call(Client.java:739)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220)
        at $Proxy0.addBlock(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        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 $Proxy0.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:2873)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2755)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:2046)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2232)

10/08/02 15:36:04 WARN hdfs.DFSClient: NotReplicatedYetException sleeping /user/root/in/LICENSE.txt retries left 3
10/08/02 15:36:05 INFO hdfs.DFSClient: org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/root/in/LICENSE.txt could only be replicated to 0 nodes, instead of 1
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1256)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:422)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953)

        at org.apache.hadoop.ipc.Client.call(Client.java:739)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220)
        at $Proxy0.addBlock(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        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 $Proxy0.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:2873)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2755)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:2046)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2232)

10/08/02 15:36:05 WARN hdfs.DFSClient: NotReplicatedYetException sleeping /user/root/in/LICENSE.txt retries left 2
10/08/02 15:36:07 INFO hdfs.DFSClient: org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/root/in/LICENSE.txt could only be replicated to 0 nodes, instead of 1
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1256)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:422)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953)

        at org.apache.hadoop.ipc.Client.call(Client.java:739)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220)
        at $Proxy0.addBlock(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        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 $Proxy0.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:2873)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2755)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:2046)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2232)

10/08/02 15:36:07 WARN hdfs.DFSClient: NotReplicatedYetException sleeping /user/root/in/LICENSE.txt retries left 1
10/08/02 15:36:10 WARN hdfs.DFSClient: DataStreamer Exception: org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /user/root/in/LICENSE.txt could only be replicated to 0 nodes, instead of 1
        at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1256)
        at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:422)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:597)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959)
        at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:396)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:953)

        at org.apache.hadoop.ipc.Client.call(Client.java:739)
        at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220)
        at $Proxy0.addBlock(Unknown Source)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        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 $Proxy0.addBlock(Unknown Source)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:2873)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2755)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:2046)
        at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2232)

10/08/02 15:36:10 WARN hdfs.DFSClient: Error Recovery for block null bad datanode[0] nodes == null
10/08/02 15:36:10 WARN hdfs.DFSClient: Could not get block locations. Source file "/user/root/in/LICENSE.txt" - Aborting...
put: java.io.IOException: File /user/root/in/LICENSE.txt could only be replicated to 0 nodes, instead of 1

 

看到“could only be replicated to 0 nodes, instead of 1”这句信息的时候,你可能会首先想到是否hdfs-site.xml配置文件中的属性dfs.replication配置错误,但事实上并不是这样。

这时,就要查看启动日志了,我的是位于/root/hadoop-0.20.0/logs下面,如下所示:

hadoop-root-datanode-localhost.log    hadoop-root-namenode-localhost.log           hadoop-root-tasktracker-localhost.log

hadoop-root-datanode-localhost.out    hadoop-root-namenode-localhost.out           hadoop-root-tasktracker-localhost.out
hadoop-root-jobtracker-localhost.log  hadoop-root-secondarynamenode-localhost.log  history
hadoop-root-jobtracker-localhost.out  hadoop-root-secondarynamenode-localhost.out

查看hadoop-root-datanode-localhost.log日志文件,看到异常信息:

2010-08-02 15:38:34,642 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: STARTUP_MSG: 
/************************************************************
STARTUP_MSG: Starting DataNode
STARTUP_MSG:   host = localhost/127.0.0.1
STARTUP_MSG:   args = []
STARTUP_MSG:   version = 0.20.0
STARTUP_MSG:   build = https://svn.apache.org/repos/asf/hadoop/core/branches/branch-0.20 -r 763504; compiled by 'ndaley' on Thu Apr  9 05:18:40 UTC 2009
************************************************************/
2010-08-02 15:38:35,381 ERROR org.apache.hadoop.hdfs.server.datanode.DataNode: java.io.IOException: Incompatible namespaceIDs in /tmp/hadoop-root/dfs/data: namenode namespaceID = 409052671; datanode namespaceID = 769845957
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.doTransition(DataStorage.java:233)
        at org.apache.hadoop.hdfs.server.datanode.DataStorage.recoverTransitionRead(DataStorage.java:148)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.startDataNode(DataNode.java:298)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.<init>(DataNode.java:216)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.makeInstance(DataNode.java:1283)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1238)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1246)
        at org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1368)

2010-08-02 15:38:35,382 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG: 
/************************************************************
SHUTDOWN_MSG: Shutting down DataNode at localhost/127.0.0.1
************************************************************/

通过上面的信息,大致可以了解到,通过“Incompatible namespaceIDs in /tmp/hadoop-root/dfs/data”可知,是由于 /tmp/hadoop-root/dfs/data中的namespaceIDs不兼容导致的,也就是说,很可能是由于上次运行其它版本的Hadoop在/tmp/hadoop-root/dfs/data目录下有残留的不兼容的数据。事实上在我运行过程中出现这个问题就是由于,刚刚尝试了Hadoop-0.19.0版本的运行,运行后并没有清理这些数据。

(2)解决方法

清理对应目录 /tmp/hadoop-root/dfs/data的数据以后,就可以正常运行了,这时执行启动各个进程之后,通过jps命令可以查看到结果如下所示:

5386 JobTracker
5253 DataNode
5529 Jps
4874 SecondaryNameNode
5489 TaskTracker
4649 NameNode

上面5个进程都启动起来了,可以上传文件到HDFS,并执行wordcount例子

本篇文章来源于 Linux公社网站(www.linuxidc.com)  原文链接:http://www.linuxidc.com/Linux/2010-08/27484p3.htm

 

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