datanode无法启动Block pool ID needed, but service not yet registered with NN

2015-10-15 14:12:41,319 INFO  datanode.DataNode (DataXceiverServer.java:<init>(75)) - Balancing bandwith is 6250000 bytes/s

        at org.apache.hadoop.hdfs.server.datanode.DataNode.initStorage(DataNode.java:969)

        at org.apache.hadoop.hdfs.server.datanode.DataNode.initBlockPool(DataNode.java:940)

        at org.apache.hadoop.hdfs.server.datanode.BPOfferService.verifyAndSetNamespaceInfo(BPOfferService.java:274)

        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.connectToNNAndHandshake(BPServiceActor.java:220)

        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:815)

        at java.lang.Thread.run(Thread.java:745)

2015-10-15 14:09:09,793 WARN  datanode.DataNode (BPServiceActor.java:run(836)) - Ending block pool service for: Block pool <registering> (Datanode Uuid unassigned) service to nn01/192.168.2.101:8020

2015-10-15 14:09:09,794 WARN  datanode.DataNode (BPServiceActor.java:run(836)) - Ending block pool service for: Block pool <registering> (Datanode Uuid unassigned) service to nn02t/192.168.2.102:8020

2015-10-15 14:09:09,895 WARN  datanode.DataNode (BPOfferService.java:getBlockPoolId(143)) - Block pool ID needed, but service not yet registered with NN

java.lang.Exception: trace

        at org.apache.hadoop.hdfs.server.datanode.BPOfferService.getBlockPoolId(BPOfferService.java:143)

        at org.apache.hadoop.hdfs.server.datanode.BlockPoolManager.remove(BlockPoolManager.java:91)

        at org.apache.hadoop.hdfs.server.datanode.DataNode.shutdownBlockPool(DataNode.java:899)

        at org.apache.hadoop.hdfs.server.datanode.BPOfferService.shutdownActor(BPOfferService.java:350)

        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.cleanUp(BPServiceActor.java:619)

        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:837)

        at java.lang.Thread.run(Thread.java:745)

2015-10-15 14:09:09,896 INFO  datanode.DataNode (BlockPoolManager.java:remove(99)) - Removed Block pool <registering> (Datanode Uuid unassigned)

2015-10-15 14:09:09,896 WARN  datanode.DataNode (BPOfferService.java:getBlockPoolId(143)) - Block pool ID needed, but service not yet registered with NN

java.lang.Exception: trace

        at org.apache.hadoop.hdfs.server.datanode.BPOfferService.getBlockPoolId(BPOfferService.java:143)

        at org.apache.hadoop.hdfs.server.datanode.DataNode.shutdownBlockPool(DataNode.java:901)

        at org.apache.hadoop.hdfs.server.datanode.BPOfferService.shutdownActor(BPOfferService.java:350)

        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.cleanUp(BPServiceActor.java:619)

        at org.apache.hadoop.hdfs.server.datanode.BPServiceActor.run(BPServiceActor.java:837)

        at java.lang.Thread.run(Thread.java:745)

2015-10-15 14:09:11,897 WARN  datanode.DataNode (DataNode.java:secureMain(2049)) - Exiting Datanode

2015-10-15 14:09:11,900 INFO  util.ExitUtil (ExitUtil.java:terminate(124)) - Exiting with status 0

2015-10-15 14:09:11,903 INFO  datanode.DataNode (StringUtils.java:run(640)) - SHUTDOWN_MSG:

/************************************************************

SHUTDOWN_MSG: Shutting down DataNode at dn06/192.168.2.110

解决方法：

mv /diska/hadoop/hdfs/data/current  /diska/hadoop/hdfs/data/current.bak

再次启动datanode 正常启动了，

原因，我将之前的/diska/hadoop/hdfs/data文件拷贝到/diska/hadoop/hdfs/data中，因为是过时的文件NN找不到信息，所以导致datanode无法正常启动。