Me estoy poniendo en práctica el nodo de clúster Hadoop individual en mi máquina siguiendo Michael Noll's tutorial y han llegado a través de error de replicación de datos:replicación de datos en Hadoop
Aquí es el mensaje de error completo:
> [email protected]:~/hadoop$ bin/hadoop dfs -copyFromLocal > tmp/testfiles testfiles > > 12/05/04 16:18:41 WARN hdfs.DFSClient: DataStreamer Exception: > org.apache.hadoop.ipc.RemoteException: java.io.IOException: File > /user/hadoop/testfiles/testfiles/file1.txt could only be replicated to > 0 nodes, instead of 1 at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1271) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:422) > at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source) at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) at > org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508) at > org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959) at > org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955) at > java.security.AccessController.doPrivileged(Native Method) at > javax.security.auth.Subject.doAs(Subject.java:396) at > org.apache.hadoop.ipc.Server$Handler.run(Server.java:953) > > at org.apache.hadoop.ipc.Client.call(Client.java:740) at > org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220) at > $Proxy0.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:82) > at > org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59) > at $Proxy0.addBlock(Unknown Source) at > org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:2937) > at > org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2819) > at > org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:2102) > at > org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2288) > > 12/05/04 16:18:41 WARN hdfs.DFSClient: Error Recovery for block null > bad datanode[0] nodes == null 12/05/04 16:18:41 WARN hdfs.DFSClient: > Could not get block locations. Source file > "/user/hadoop/testfiles/testfiles/file1.txt" - Aborting... > copyFromLocal: java.io.IOException: File > /user/hadoop/testfiles/testfiles/file1.txt could only be replicated to > 0 nodes, instead of 1 12/05/04 16:18:41 ERROR hdfs.DFSClient: > Exception closing file /user/hadoop/testfiles/testfiles/file1.txt : > org.apache.hadoop.ipc.RemoteException: java.io.IOException: File > /user/hadoop/testfiles/testfiles/file1.txt could only be replicated to > 0 nodes, instead of 1 at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1271) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:422) > at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source) at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) at > org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508) at > org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959) at > org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955) at > java.security.AccessController.doPrivileged(Native Method) at > javax.security.auth.Subject.doAs(Subject.java:396) at > org.apache.hadoop.ipc.Server$Handler.run(Server.java:953) > > org.apache.hadoop.ipc.RemoteException: java.io.IOException: File > /user/hadoop/testfiles/testfiles/file1.txt could only be replicated to > 0 nodes, instead of 1 at > org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:1271) > at > org.apache.hadoop.hdfs.server.namenode.NameNode.addBlock(NameNode.java:422) > at sun.reflect.GeneratedMethodAccessor7.invoke(Unknown Source) at > sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) > at java.lang.reflect.Method.invoke(Method.java:597) at > org.apache.hadoop.ipc.RPC$Server.call(RPC.java:508) at > org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:959) at > org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:955) at > java.security.AccessController.doPrivileged(Native Method) at > javax.security.auth.Subject.doAs(Subject.java:396) at > org.apache.hadoop.ipc.Server$Handler.run(Server.java:953) > > at org.apache.hadoop.ipc.Client.call(Client.java:740) at > org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220) at > $Proxy0.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:82) > at > org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:59) > at $Proxy0.addBlock(Unknown Source) at > org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.locateFollowingBlock(DFSClient.java:2937) > at > org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.nextBlockOutputStream(DFSClient.java:2819) > at > org.apache.hadoop.hdfs.DFSClient$DFSOutputStream.access$2000(DFSClient.java:2102) > at > org.apache.hadoop.hdfs.DFSClient$DFSOutputStream$DataStreamer.run(DFSClient.java:2288)
También cuando ejecutar:
bin/stop-all.sh
Dice que el nodo de datos no se ha iniciado y, por lo tanto, no se puede detener. Sin embargo, la salida de jps indica que el nodo de datos está presente.
me trataron formatear la NameNode, cambiantes permisos de propietario, pero no parece funcionar. Espero no haber perdido ninguna otra información relevante.
Gracias de antemano.
gracias, en realidad encontrado la solución. Fue porque el nodo de datos y el namenode tardan en iniciarse y en lugar de ejecutar 'bin/start-all.sh', hice' bin/hadoop namenode', 'bin/hadoop datanode' y luego' bin/start-mapred.sh '. –