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HBase >> mail # user >> hbase 0.96 stop master receive ERROR ipc.RPC: RPC.stopProxy called on non proxy.


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hbase 0.96 stop master receive ERROR ipc.RPC: RPC.stopProxy called on non proxy.
Hi All,

When stopping master or regionserver, I found some ERROR and WARN in the log files, are these errors can cause problem in hbase:

13/11/21 09:31:16 INFO zookeeper.ClientCnxn: EventThread shut down
13/11/21 09:35:36 ERROR ipc.RPC: RPC.stopProxy called on non proxy.
java.lang.IllegalArgumentException: object is not an instance of declaring class
        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.hbase.fs.HFileSystem$1.invoke(HFileSystem.java:266)
        at $Proxy18.close(Unknown Source)
        at org.apache.hadoop.ipc.RPC.stopProxy(RPC.java:621)
        at org.apache.hadoop.hdfs.DFSClient.closeConnectionToNamenode(DFSClient.java:738)
        at org.apache.hadoop.hdfs.DFSClient.close(DFSClient.java:794)
        at org.apache.hadoop.hdfs.DistributedFileSystem.close(DistributedFileSystem.java:847)
        at org.apache.hadoop.fs.FileSystem$Cache.closeAll(FileSystem.java:2524)
        at org.apache.hadoop.fs.FileSystem$Cache$ClientFinalizer.run(FileSystem.java:2541)
        at org.apache.hadoop.util.ShutdownHookManager$1.run(ShutdownHookManager.java:54)
13/11/21 09:35:36 WARN util.ShutdownHookManager: ShutdownHook 'ClientFinalizer' failed, org.apache.hadoop.HadoopIllegalArgumentException: Cannot close proxy - is not Closeable or does not provide closeable invocation handler class $Proxy18
org.apache.hadoop.HadoopIllegalArgumentException: Cannot close proxy - is not Closeable or does not provide closeable invocation handler class $Proxy18
        at org.apache.hadoop.ipc.RPC.stopProxy(RPC.java:639)
        at org.apache.hadoop.hdfs.DFSClient.closeConnectionToNamenode(DFSClient.java:738)
        at org.apache.hadoop.hdfs.DFSClient.close(DFSClient.java:794)
        at org.apache.hadoop.hdfs.DistributedFileSystem.close(DistributedFileSystem.java:847)
        at org.apache.hadoop.fs.FileSystem$Cache.closeAll(FileSystem.java:2524)
        at org.apache.hadoop.fs.FileSystem$Cache$ClientFinalizer.run(FileSystem.java:2541)
        at org.apache.hadoop.util.ShutdownHookManager$1.run(ShutdownHookManager.java:54)

Best regards,
Henry

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