JMXGet |
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) |