hadoop - 多节点群集只能识别1个事件节点

Question

我有与此帖子完全相同的错误。
http://lucene.472066.n3.nabble.com/Multinode-cluster-only-recognizes-1-node-td3997585.html

我怎么解决这个问题？

编辑:

我们要运行一个2节点集群。我们的代码运行完美。
我们有一个主节点和一个从节点。由于我们希望将主节点也用作从节点，因此我们将主文件和从文件配置为:

conf/master:
master

conf/slave:
master
slave

当我在主节点上运行bin / start-all.sh时，jps按预期提供了这些:

namenode
secondarynamenode
jobtracker
datanode
tasktracker
jps

从属节点上的jps符合预期:

datanode
tasktracker
jps

一切正常。我们的配置映射站点，核心站点知道主ip和端口。在hdfs-site.xml中，复制因子设置为2。

在此配置下，mapreduce应用程序运行。但是我猜它只能在masternode的jobtracker上运行。当我查看jobtracker用户界面时，节点号为1。

另一种情况:

如果我也不想将master用作slave，则可以这样更改master和slave文件:

conf/masters:
master

conf/slaves:
slave

现在，maste rnode上的jps给出:

namenode
secondarynamenode
jobtracker
jps

从属节点上的jps按预期提供了这些:

datanode
tasktracker
jps

在此配置中，它给我“只能复制0而不是1”的错误。我在末尾添加了完整的控制台输出。

顺便说一下，hadoop_home目录路径对于两个节点都是相同的。这不再是问题。

可能是什么问题呢？

完整的控制台输出:

[adminuser@localhost hadoop-1.1.2]$ bin/hadoop jar /home/adminuser/Desktop/proje/proje.jar  arkadasoner.Main hdfs://10.0.2.15:9000/input/id.txt hdfs://10.0.2.15:9000/output/x.txt hdfs://10.0.2.15:9000/output/y.txthdfs://10.0.2.15:9000/output/z.txt

13/06/16 14:36:59 WARN mapred.JobClient: Use GenericOptionsParser for parsing the arguments. Applications should implement Tool for the same.
13/06/16 14:36:59 WARN hdfs.DFSClient: DataStreamer Exception: org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /tmp/hadoop-adminuser/mapred/staging/adminuser/.staging/job_201306161433_0001/job.jar could only be replicated to 0 nodes, instead of 1
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1639)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:736)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:578)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1393)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1389)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
    at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1387)

    at org.apache.hadoop.ipc.Client.call(Client.java:1107)
    at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:229)
    at com.sun.proxy.$Proxy1.addBlock(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:85)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:62)
    at com.sun.proxy.$Proxy1.addBlock(Unknown Source)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3686)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3546)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2600(DFSClient.java:2749)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2989)

13/06/16 14:36:59 WARN hdfs.DFSClient: Error Recovery for block null bad datanode[0] nodes == null
13/06/16 14:36:59 WARN hdfs.DFSClient: Could not get block locations. Source file "/tmp/hadoop-adminuser/mapred/staging/adminuser/.staging/job_201306161433_0001/job.jar" - Aborting...
13/06/16 14:36:59 INFO mapred.JobClient: Cleaning up the staging area hdfs://10.0.2.15:9000/tmp/hadoop-adminuser/mapred/staging/adminuser/.staging/job_201306161433_0001
13/06/16 14:36:59 ERROR security.UserGroupInformation: PriviledgedActionException as:adminuser cause:org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /tmp/hadoop-adminuser/mapred/staging/adminuser/.staging/job_201306161433_0001/job.jar could only be replicated to 0 nodes, instead of 1
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1639)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:736)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:578)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1393)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1389)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
    at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1387)

Exception in thread "main" org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /tmp/hadoop-adminuser/mapred/staging/adminuser/.staging/job_201306161433_0001/job.jar could only be replicated to 0 nodes, instead of 1
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1639)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:736)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:578)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1393)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1389)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
    at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1387)

    at org.apache.hadoop.ipc.Client.call(Client.java:1107)
    at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:229)
    at com.sun.proxy.$Proxy1.addBlock(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:85)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:62)
    at com.sun.proxy.$Proxy1.addBlock(Unknown Source)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3686)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3546)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2600(DFSClient.java:2749)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2989)
13/06/16 14:36:59 ERROR hdfs.DFSClient: Failed to close file /tmp/hadoop-adminuser/mapred/staging/adminuser/.staging/job_201306161433_0001/job.jar
org.apache.hadoop.ipc.RemoteException: java.io.IOException: File /tmp/hadoop-adminuser/mapred/staging/adminuser/.staging/job_201306161433_0001/job.jar could only be replicated to 0 nodes, instead of 1
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1639)
    at org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:736)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:578)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1393)
    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1389)
    at java.security.AccessController.doPrivileged(Native Method)
    at javax.security.auth.Subject.doAs(Subject.java:415)
    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1149)
    at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1387)

    at org.apache.hadoop.ipc.Client.call(Client.java:1107)
    at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:229)
    at com.sun.proxy.$Proxy1.addBlock(Unknown Source)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:85)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:62)
    at com.sun.proxy.$Proxy1.addBlock(Unknown Source)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:3686)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:3546)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2600(DFSClient.java:2749)
    at org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2989)

Answer 1

您请检查每个主+从配置文件中是否使用单个IP地址或类似hdfs:// master:54310的主机(每个主从上都应该相同)。其中master是我的/ etc / hosts文件中指向主节点的主机名。

我也遇到同样的问题，但是我在所有节点上都使用hdfs:// localhost:54310，然后将其更改为hdfs:// master:54310或hdfs:// xxxx:54310，其中xxxx是主节点。