Hi Can one of the implementors comment on what conditions trigger this error ?
All the data nodes show up as commissioned. No errors during startup If I google for this error, there are several posts reporting the issue : but most of the answers have weak solutions like reformating and restarting none of which help. My guess is that this is a networking /port access issue. If anyone can shed light on what conditions cause this error , it would be much appreciated. regards On Mon, Feb 24, 2014 at 1:07 PM, Manoj Khangaonkar <khangaon...@gmail.com>wrote: > Hi, > > I setup a cluster with > > machine1 : namenode and datanode > machine 2 : data node > > A simple hdfs copy is not working. Can someone help with this issue ? > Several folks have posted this error on the web, But I have seen a good > reason or solution. > > command: > bin/hadoop fs -copyFromLocal ~/hello /manoj/ > > Error: > copyFromLocal: File /manoj/hello._COPYING_ could only be replicated to 0 > nodes instead of minReplication (=1). There are 2 datanode(s) running and > no node(s) are excluded in this operation. > 14/02/24 12:56:38 ERROR hdfs.DFSClient: Failed to close file > /manoj/hello._COPYING_ > org.apache.hadoop.ipc.RemoteException(java.io.IOException): File > /manoj/hello._COPYING_ could only be replicated to 0 nodes instead of > minReplication (=1). There are 2 datanode(s) running and no node(s) are > excluded in this operation. > at > org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget(BlockManager.java:1384) > at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:2477) > at > org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:555) > at > org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:387) > at > org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java:59582) > at > org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:585) > at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:928) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2048) > at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2044) > at java.security.AccessController.doPrivileged(Native Method) > at javax.security.auth.Subject.doAs(Subject.java:396) > at > org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1491) > at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2042) > > at org.apache.hadoop.ipc.Client.call(Client.java:1347) > at org.apache.hadoop.ipc.Client.call(Client.java:1300) > at > org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:206) > at com.sun.proxy.$Proxy9.addBlock(Unknown Source) > at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) > at > sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) > at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) > at > org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:186) > at > org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102) > at com.sun.proxy.$Proxy9.addBlock(Unknown Source) > at > org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:330) > at > org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1226) > at > org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1078) > at > org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:514) > > My setup is very basic : > core-site.xml > <configuration> > <property> > <name>fs.default.name</name> > <value>hdfs://n-prd-bst-beacon01:9000</value> > </property> > <property> > <name>hadoop.tmp.dir</name> > <value>/home/manoj/hadoop-2.2.0/tmp</value> > </property> > </configuration> > > hdfs-site.xml > <configuration> > <property> > <name>dfs.replication</name> > <value>1</value> > </property> > <property> > <name>dfs.permissions</name> > <value>false</value> > </property> > </configuration> > > slaves: > localhost > n-prd-bst-beacon02.advertising.aol.com > > Namenode and Datanode (on both machines) are up & running without errors > > regards > > -- > http://khangaonkar.blogspot.com/ > -- http://khangaonkar.blogspot.com/
