hi all,there is my problem.
when add a datanode to hadoop,the way is;
1.in namenode add the new datanode to conf/slave
2.in new datanode cd $HADOOP_HOME then
$ bin/hadoop-daemon.sh start datanode
$ bin/hadoop-daemon.sh start tasktracker
3.in namenode,
$bin/hadoop balancer
and the new datanode is added to hadoop,but a old datanode is shutdown
and here is the logs in datanode which is shutdown
2009-10-14 13:16:30,604 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: BlockReport of 3 blocks got processed in 5 msecs
2009-10-14 13:48:44,395 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeCommand action: DNA_REGISTER
2009-10-14 13:48:47,402 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeCommand action: DNA_REGISTER
2009-10-14 13:48:50,403 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeCommand action: DNA_REGISTER
2009-10-14 13:48:53,407 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeCommand action: DNA_REGISTER
2009-10-14 13:48:56,418 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeCommand action: DNA_REGISTER
2009-10-14 13:48:59,415 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeCommand action: DNA_REGISTER
2009-10-14 13:49:02,420 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: DataNode is shutting down: org.apache.hadoop.ipc.RemoteException: org.apache.hadoop.hdfs.protocol.UnregisteredDatanodeException: Data node 100.207.100.33:50010 is attempting to report storage ID DS-1277539940-100.207.100.33-50010-1255486116525. Node 100.207.100.25:50010 is expected to serve this storage.
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getDatanode(FSNamesystem.java:3914)
at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.processReport(FSNamesystem.java:2885)
at org.apache.hadoop.hdfs.server.namenode.NameNode.blockReport(NameNode.java:715)
at sun.reflect.GeneratedMethodAccessor11.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.apache.hadoop.ipc.RPC$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:739)
at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:220)
at $Proxy4.blockReport(Unknown Source)
at org.apache.hadoop.hdfs.server.datanode.DataNode.offerService(DataNode.java:756)
at org.apache.hadoop.hdfs.server.datanode.DataNode.run(DataNode.java:1186)
at java.lang.Thread.run(Thread.java:619)
2009-10-14 13:49:02,527 INFO org.apache.hadoop.ipc.Server: Stopping server on 50020
2009-10-14 13:49:02,528 INFO org.apache.hadoop.ipc.Server: IPC Server handler 1 on 50020: exiting
2009-10-14 13:49:02,529 INFO org.apache.hadoop.ipc.Server: Stopping IPC Server Responder
2009-10-14 13:49:02,529 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Waiting for threadgroup to exit, active threads is 1
2009-10-14 13:49:02,528 INFO org.apache.hadoop.ipc.Server: IPC Server handler 0 on 50020: exiting
2009-10-14 13:49:02,528 INFO org.apache.hadoop.ipc.Server: IPC Server handler 2 on 50020: exiting
2009-10-14 13:49:02,529 WARN org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeRegistration(10.207.0.33:50010, storageID=DS-1277539940-100.207.100.33-50010-1255486116525, infoPort=50075, ipcPort=50020):DataXceiveServer: java.nio.channels.AsynchronousCloseException
at java.nio.channels.spi.AbstractInterruptibleChannel.end(AbstractInterruptibleChannel.java:185)
at sun.nio.ch.ServerSocketChannelImpl.accept(ServerSocketChannelImpl.java:152)
at sun.nio.ch.ServerSocketAdaptor.accept(ServerSocketAdaptor.java:84)
at org.apache.hadoop.hdfs.server.datanode.DataXceiverServer.run(DataXceiverServer.java:130)
at java.lang.Thread.run(Thread.java:619)
2009-10-14 13:49:02,530 INFO org.apache.hadoop.ipc.Server: Stopping IPC Server listener on 50020
2009-10-14 13:49:03,267 INFO org.apache.hadoop.hdfs.server.datanode.DataBlockScanner: Exiting DataBlockScanner thread.
2009-10-14 13:49:03,530 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Waiting for threadgroup to exit, active threads is 0
2009-10-14 13:49:03,635 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: DatanodeRegistration(10.207.0.33:50010, storageID=DS-1277539940-100.207.100.33-50010-1255486116525, infoPort=50075, ipcPort=50020):Finishing DataNode in: FSDataset{dirpath='/data0/hadoop/hadoopfs/data/current'}
2009-10-14 13:49:03,635 INFO org.apache.hadoop.ipc.Server: Stopping server on 50020
2009-10-14 13:49:03,635 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: Waiting for threadgroup to exit, active threads is 0
2009-10-14 13:49:03,636 INFO org.apache.hadoop.hdfs.server.datanode.DataNode: SHUTDOWN_MSG:
/************************************************************
SHUTDOWN_MSG: Shutting down DataNode at cent52ip33/100.207.100.33
************************************************************/
----hdfs-core.xml----
...
<property>
<name>dfs.replication</name>
<value>1</value>
</property>
...
can anybody help me please?
Thanks!
Darren.
