hadoop相关端口说明
http相关端口：DaemonDefault PortConfiguration ParameterHDFSNamenode50070dfs.http.addressDatanodes50075dfs.datanode.http.addressSecondarynamenode50090dfs.secondary.http.addressBackup/Checkpoint node❋50105dfs.backup.http.addressMapReduceJobracker50030mapred.job.tracker.http.addressTasktrackers50060mapred.task.tracker.http.address❋ Replaces secondarynamenode in 0.21.
hadoop相关进程服务端口：
DaemonDefault PortConfiguration ParameterProtocolUsed forNamenode8020fs.default.name①IPC: ClientProtocolFilesystem metadata operations.Datanode50010dfs.datanode.addressCustom Hadoop Xceiver: DataNodeand DFSClientDFS data transferDatanode50020dfs.datanode.ipc.addressIPC:InterDatanodeProtocol,ClientDatanodeProtocol
ClientProtocolBlock metadata operations and recoveryBackupnode50100dfs.backup.addressSame as namenodeHDFS Metadata OperationsJobtrackerIll-defined.②mapred.job.trackerIPC:JobSubmissionProtocol,InterTrackerProtocolJob submission, task tracker heartbeats.Tasktracker127.0.0.1:0 ③mapred.task.tracker.report.addressIPC:TaskUmbilicalProtocolCommunicating with child jobs① This is the port part of hdfs://host:8020/.
② Default is not well-defined. Common values are 8021, 9001, or 8012. See MAPREDUCE-566.
③ Binds to an unused local port.
摘录：http://www.cloudera.com/blog/2009/08/hadoop-default-ports-quick-reference/
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