这是错误快照：
[hduser@secondary ~]$ yarn jar test_word_count.jar com.test.wordc.WordCount /temp /test_output
18/10/11 16:13:01 WARN util.NativeCodeLoader: Unable to load native-hadoop library for your platform... using builtin-java classes where applicable
18/10/11 16:13:02 INFO client.RMProxy: Connecting to ResourceManager at master/10.0.70.148:8032
18/10/11 16:13:02 WARN mapreduce.JobSubmitter: Hadoop command-line option parsing not performed. Implement the Tool interface and execute your application with ToolRunner to remedy this.
18/10/11 16:13:03 INFO input.FileInputFormat: Total input paths to process : 1
18/10/11 16:13:03 INFO mapreduce.JobSubmitter: number of splits:1
18/10/11 16:13:04 INFO mapreduce.JobSubmitter: Submitting tokens for job: job_1539254507997_0001
18/10/11 16:13:04 INFO impl.YarnClientImpl: Submitted application application_1539254507997_0001
18/10/11 16:13:04 INFO mapreduce.Job: The url to track the job: http://secondary:8088/proxy/application_1539254507997_0001/
18/10/11 16:13:04 INFO mapreduce.Job: Running job: job_1539254507997_0001
18/10/11 16:13:05 INFO mapreduce.Job: Job job_1539254507997_0001 running in uber mode : false
18/10/11 16:13:05 INFO mapreduce.Job: map 0% reduce 0%
18/10/11 16:13:05 INFO mapreduce.Job: Job job_1539254507997_0001 failed with state FAILED due to: Application application_1539254507997_0001 failed 2 times due to Error launching appattempt_1539254507997_0001_000002. Got exception: java.io.IOException: Failed on local exception: java.io.IOException: java.io.EOFException; Host Details : local host is: "secondary/10.0.70.149"; destination host is: "slave4":38102;
at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:772)
at org.apache.hadoop.ipc.Client.call(Client.java:1472)
at org.apache.hadoop.ipc.Client.call(Client.java:1399)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:232)
at com.sun.proxy.$Proxy32.startContainers(Unknown Source)
at org.apache.hadoop.yarn.api.impl.pb.client.ContainerManagementProtocolPBClientImpl.startContainers(ContainerManagementProtocolPBClientImpl.java:96)
at org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher.launch(AMLauncher.java:119)
at org.apache.hadoop.yarn.server.resourcemanager.amlauncher.AMLauncher.run(AMLauncher.java:254)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.io.IOException: java.io.EOFException
at org.apache.hadoop.ipc.Client$Connection$1.run(Client.java:680)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
at org.apache.hadoop.ipc.Client$Connection.handleSaslConnectionFailure(Client.java:643)
at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:730)
at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:368)
at org.apache.hadoop.ipc.Client.getConnection(Client.java:1521)
at org.apache.hadoop.ipc.Client.call(Client.java:1438)
... 9 more
Caused by: java.io.EOFException
at java.io.DataInputStream.readInt(DataInputStream.java:392)
at org.apache.hadoop.security.SaslRpcClient.saslConnect(SaslRpcClient.java:367)
at org.apache.hadoop.ipc.Client$Connection.setupSaslConnection(Client.java:553)
at org.apache.hadoop.ipc.Client$Connection.access$1800(Client.java:368)
at org.apache.hadoop.ipc.Client$Connection$2.run(Client.java:722)
at org.apache.hadoop.ipc.Client$Connection$2.run(Client.java:718)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:422)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:717)
... 12 more
. Failing the application.
18/10/11 16:13:05 INFO mapreduce.Job: Counters: 0
这是/etc/hosts 文件
[hduser@secondary ~]$ cat /etc/hosts
127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4
::1 localhost localhost.localdomain localhost6 localhost6.localdomain6
10.0.70.149 secondary
10.0.70.148 master
10.0.70.143 slave1
10.0.70.144 slave2
10.0.70.145 slave3
10.0.70.146 slave4
10.0.70.147 slave5
所有服务运行良好。它是一个具有 5 个 DN 和 1 个 NN 的 6 节点群集。 提交作业后，我收到上面列出的错误。NN hadoop 版本是 hadoop 2.6.0，而 DN 中的 hadoop 版本是 2.5.2。这是一个 maven 构建，在 pom 中使用 hadoop版本 2.6.0.xml
通过在名称模式iteslf上安装Hadoop 2.5.2来修复错误。似乎整个集群需要相同的 hadoop 版本。