remote rename failure: NullPointerException

[gangliao]

2020-06-10 08:56:08,645 INFO org.apache.hadoop.ipc.Server: IPC Server handler 0 on default port 10086, call Call#0 Retry#0 logEdit([B@6aca0bcb), rpc version=2, client version=1, methodsFingerPrint=-238232010 from 127.0.0.1:50232
java.io.IOException: java.lang.NullPointerException
        at org.apache.hadoop.hdfs.server.namenode.FSEditLogProtocolImpl.logEdit(FSEditLogProtocolImpl.java:180)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.lang.reflect.Method.invoke(Method.java:498)
        at org.apache.hadoop.ipc.WritableRpcEngine$Server$WritableRpcInvoker.call(WritableRpcEngine.java:519)
        at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:1025)
        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:906)
        at org.apache.hadoop.ipc.Server$RpcCall.run(Server.java:852)
        at java.security.AccessController.doPrivileged(Native Method)
        at javax.security.auth.Subject.doAs(Subject.java:422)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1876)
        at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2753)
2020-06-10 08:56:08,665 INFO org.apache.hadoop.hdfs.StateChange: STATE* Safe mode is already OFF