json - 警告 hdfs.DFSClient : DataStreamer Exception org. apache.hadoop.ipc.RemoteException(java.io.IOException) : File/in/recipeitems-latest. json._COPYING_

Question

当我尝试复制 json 时遇到问题从本地路径到 Hadoop 文件分布式系统。我已按照此链接 http://www.codeproject.com/Articles/757934/Apache-Hadoop-for-Windows-Platform 中给出的编码步骤进行操作。

我正在使用 Windows 8 操作系统。请在下面找到错误并帮助我解决此问题。

在cmd中我执行了这个命令:
D:\BigData\hadoop-2.7.1\sbin>hadoop fs -copyFromLocal c:\Hwork\recipeitems-latest.json /in

> 16/10/04 20:20:53 WARN hdfs.DFSClient: DataStreamer Exception
> org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /in/recipeitems-latest.json._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1).  There are 0 datanode(s) running and no node(s) are excluded in this operation.
>         at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1550)
>         at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getNewBlockTargets(FSNamesystem.java:3110)
>         at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3034)
>         at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:723)
>         at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:492)
>         at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
>         at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:616)
>         at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:969)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2049)
>         at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2045)
>         at java.security.AccessController.doPrivileged(Native Method)
>         at javax.security.auth.Subject.doAs(Subject.java:415)
>         at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
>         at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2043)
> 
>         at org.apache.hadoop.ipc.Client.call(Client.java:1476)
>         at org.apache.hadoop.ipc.Client.call(Client.java:1407)
>         at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:229)
>         at com.sun.proxy.$Proxy9.addBlock(Unknown Source)
>         at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:418)
>         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:606)
>         at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:187)
>         at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)
>         at com.sun.proxy.$Proxy10.addBlock(Unknown Source)
>         at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1430)
>         at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1226)
>         at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:449)
> copyFromLocal: File /in/recipeitems-latest.json._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1).  There are 0 datanode(s) running and no node(s) are excluded in this operation.
> 

Answer 1

请引用以下网址。增加HDFS、YARN、MR中的“hdfs_user_nofile_limit”参数。

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