got Java.lang.NullPointerException on two node when I restart cluster

[SP]

Hi,


did any one got these error before, please help


ERROR org.apache.hadoop.hdfs.server.datanode.DataNode:
xxxxx.com:50010:DataXceiver
error processing WRITE_BLOCK operation  src: /xxxxxxxx:39000 dst:
/xxxxxx:50010

java.lang.NullPointerException

        at
org.apache.hadoop.hdfs.server.datanode.BlockReceiver.<init>(BlockReceiver.java:167)

        at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.writeBlock(DataXceiver.java:604)

        at
org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.opWriteBlock(Receiver.java:126)

        at
org.apache.hadoop.hdfs.protocol.datatransfer.Receiver.processOp(Receiver.java:72)

        at
org.apache.hadoop.hdfs.server.datanode.DataXceiver.run(DataXceiver.java:225)

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

2015-01-11 04:13:21,846 WARN
org.apache.hadoop.hdfs.server.datanode.DataNode: IOException in offerService



WARN org.apache.hadoop.hdfs.server.datanode.DataNode: Slow BlockReceiver
write packet to mirror took 657ms (threshold=300ms)



Thanks