JMXGet
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tool to get data from NameNode or DataNode using MBeans currently the following MBeans are available (under hadoop domain): hadoop:service=NameNode name=FSNamesystemState (static) hadoop:service=NameNode name=NameNodeActivity (dynamic) hadoop:service=NameNode name=RpcActivityForPort9000 (dynamic) hadoop:service=DataNode name=RpcActivityForPort50020 (dynamic) hadoop:name=service=DataNode FSDatasetState-UndefinedStorageId663800459 (static) hadoop:service=DataNode name=DataNodeActivity-UndefinedStorageId-520845215 (dynamic) implementation note: all logging is sent to System.err (since it is a command line tool) |