4
我試圖運行分佈式殼爲例（使用Hadoop的SVN結帳，這就是爲什麼版本爲3.0.0-SNAPSHOT）：的Hadoop /紗線分佈殼例如
yarn jar share/hadoop/yarn/hadoop-yarn-applications-distributedshell-3.0.0-SNAPSHOT.jar \
-jar share/hadoop/yarn/hadoop-yarn-applications-distributedshell-3.0.0-SNAPSHOT.jar \
org.apache.hadoop.yarn.applications.distributedshell.Client -shell_command whoami
然而這是行不通的：
12/09/03 13:44:37 FATAL distributedshell.Client: Error running CLient
java.lang.reflect.UndeclaredThrowableException
at org.apache.hadoop.yarn.exceptions.impl.pb.YarnRemoteExceptionPBImpl.unwrapAndThrowException(YarnRemoteExceptionPBImpl.java:128)
at org.apache.hadoop.yarn.api.impl.pb.client.ClientRMProtocolPBClientImpl.getClusterMetrics(ClientRMProtocolPBClientImpl.java:123)
at org.hadoop.yarn.client.YarnClientImpl.getYarnClusterMetrics(YarnClientImpl.java:163)
at org.apache.hadoop.yarn.applications.distributedshell.Client.run(Client.java:316)
at org.apache.hadoop.yarn.applications.distributedshell.Client.main(Client.java:164)
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.util.RunJar.main(RunJar.java:208)
Caused by: org.apache.hadoop.ipc.RemoteException(java.io.IOException): Unknown protocol: org.apache.hadoop.yarn.api.ClientRMProtocolPB
at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.getProtocolImpl(ProtobufRpcEngine.java:398)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:456)
at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:898)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1732)
at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:1728)
at java.security.AccessController.doPrivileged(Native Method)
at javax.security.auth.Subject.doAs(Subject.java:415)
at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1367)
at org.apache.hadoop.ipc.Server$Handler.run(Server.java:1726)
at org.apache.hadoop.ipc.Client.call(Client.java:1164)
at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:202)
at $Proxy7.getClusterMetrics(Unknown Source)
at org.apache.hadoop.yarn.api.impl.pb.client.ClientRMProtocolPBClientImpl.getClusterMetrics(ClientRMProtocolPBClientImpl.java:121)
... 8 more
根本的問題似乎是在第二跡：
Unknown protocol: org.apache.hadoop.yarn.api.ClientRMProtocolPB
有誰知道Hadoops ProtoBufRPC的協議註冊是如何工作的？任何想法如何調試？
編輯：隨着Hadoop版本2.0.1-alpha，它的工作稍好。
12/09/03 18:43:14 INFO distributedshell.Client: Application did not finish. YarnState=FAILED, DSFinalStatus=FAILED. Breaking monitoring loop
12/09/03 18:43:14 ERROR distributedshell.Client: Application failed to complete successfully
因此，也許我的構建沒有正常工作。任何關於導致上述問題的想法（我真的很喜歡使用HEAD，因爲我打算在MapReduce之外做一些低級別的實驗）？或HEAD部分損壞，HEAD上的分佈式shell是否適合您？
我自己的（沒有工作......）客戶端仍然無法與同樣的錯誤：
Caused by: java.io.IOException: Unknown protocol: org.apache.hadoop.yarn.api.ClientRMProtocolPB