Hadoop 将文件复制到HDFS

我想将文件SalesJan2009.csv（存储在本地文件系统~/input/SalesJan2009.csv）复制到HDFS（Hadoop分布式文件系统）主目录

我写了这段代码 hduser@ubuntu：/usr/local/hadoop$hdfs dfs-copyFromLocal'/home/hduser/Desktop/input/SalesJan2009.csv'/hdfs path

这就是结果：19/11/27 07:05:16 WARN hdfs.DataStreamer:DataStreamer异常

org.apache.hadoop.ipc.RemoteException(java.io.IOException): File /HDFS-path._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:1814)
    at org.apache.hadoop.hdfs.server.namenode.FSDirWriteFileOp.chooseTargetForNewBlock(FSDirWriteFileOp.java:265)
    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:2569)
    at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:846)
    at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:510)
    at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)
    at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:503)
    at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:989)
    at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:871)
    at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:817)
    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:1893)
    at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2606)

    at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1507)
    at org.apache.hadoop.ipc.Client.call(Client.java:1453)
    at org.apache.hadoop.ipc.Client.call(Client.java:1363)
    at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:227)
    at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:116)
    at com.sun.proxy.$Proxy10.addBlock(Unknown Source)
    at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:444)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:422)
    at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeMethod(RetryInvocationHandler.java:165)
    at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invoke(RetryInvocationHandler.java:157)
    at org.apache.hadoop.io.retry.RetryInvocationHandler$Call.invokeOnce(RetryInvocationHandler.java:95)
    at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:359)
    at com.sun.proxy.$Proxy11.addBlock(Unknown Source)
    at org.apache.hadoop.hdfs.DataStreamer.locateFollowingBlock(DataStreamer.java:1845)
    at org.apache.hadoop.hdfs.DataStreamer.nextBlockOutputStream(DataStreamer.java:1645)
    at org.apache.hadoop.hdfs.DataStreamer.run(DataStreamer.java:710)
copyFromLocal: File /HDFS-path._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.

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您为复制文件而发出的命令是正确的。

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但是，集群中似乎没有活动的数据节点。要执行hdfs操作，至少需要一个datanode。请检查这个

您的HDFS设置不正确。正如它告诉您的，您没有活动的数据节点。你应该至少有一个。当然，这不是编程问题，而是群集配置中的问题，因此它不适合StackOverflow。谢谢，Cricket，我将尝试修复HDFSHi Priyanka，感谢您的帮助，Datanode没有在我的hadoop中运行，当它开始工作时，namenode就消失了。我收到了以下错误：copyFromLocal:从ubuntu/127.0.1.1调用localhost:9000连接失败异常：java.net.ConnectException:连接被拒绝；有关更多详细信息，请参见：你好，阿卜杜勒，请参阅此链接-[