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java.lang.UnsupportedOperationException: This is supposed to be overridden by subclasses.	at com.google.protobuf.GeneratedMessage.getUnknownFields(GeneratedMessage.java:180)	at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$GetFileInfoRequestProto.getSerializedSize(ClientNamenodeProtocolProtos.java:30108)	at com.google.protobuf.AbstractMessageLite.toByteString(AbstractMessageLite.java:49)	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.constructRpcRequest(ProtobufRpcEngine.java:149)	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:193)	at com.sun.proxy.$Proxy43.getFileInfo(Unknown Source)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:164)	at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:83)	at com.sun.proxy.$Proxy43.getFileInfo(Unknown Source)	at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.getFileInfo(ClientNamenodeProtocolTranslatorPB.java:629)	at org.apache.hadoop.hdfs.DFSClient.getFileInfo(DFSClient.java:1545)	at org.apache.hadoop.hdfs.DistributedFileSystem.getFileStatus(DistributedFileSystem.java:819)	at org.apache.hadoop.fs.FileSystem.globStatusInternal(FileSystem.java:1646)	at org.apache.hadoop.fs.FileSystem.globStatus(FileSystem.java:1592)	at org.apache.hadoop.fs.FileSystem.globStatus(FileSystem.java:1567)	at org.apache.hadoop.fs.shell.PathData.expandAsGlob(PathData.java:271)	at org.apache.hadoop.fs.shell.Command.expandArgument(Command.java:224)	at org.apache.hadoop.fs.shell.Command.expandArguments(Command.java:207)	at org.apache.hadoop.fs.shell.Command.processRawArguments(Command.java:190)	at org.apache.hadoop.fs.shell.Command.run(Command.java:154)	at org.apache.hadoop.fs.FsShell.run(FsShell.java:254)	at org.springframework.xd.shell.hadoop.FsShellCommands.run(FsShellCommands.java:412)	at org.springframework.xd.shell.hadoop.FsShellCommands.runCommand(FsShellCommands.java:407)	at org.springframework.xd.shell.hadoop.FsShellCommands.ls(FsShellCommands.java:110)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:606)	at org.springframework.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:196)	at org.springframework.shell.core.SimpleExecutionStrategy.invoke(SimpleExecutionStrategy.java:64)	at org.springframework.shell.core.SimpleExecutionStrategy.execute(SimpleExecutionStrategy.java:48)	at org.springframework.shell.core.AbstractShell.executeCommand(AbstractShell.java:127)	at org.springframework.shell.core.JLineShell.promptLoop(JLineShell.java:530)	at org.springframework.shell.core.JLineShell.run(JLineShell.java:178)	at java.lang.Thread.run(Thread.java:744)