root@mathon-Y430P:/opt/hadoop-1.2.1/bin#?start-all.sh? Warning:?$HADOOP_HOME?is?deprecated. starting?namenode,?logging?to?/opt/hadoop-1.2.1/libexec/../logs/hadoop-root-namenode-mathon-Y430P.out root@localhost's?password:? localhost:?starting?datanode,?logging?to?/opt/hadoop-1.2.1/libexec/../logs/hadoop-root-datanode-mathon-Y430P.out root@localhost's?password:? localhost:?starting?secondarynamenode,?logging?to?/opt/hadoop-1.2.1/libexec/../logs/hadoop-root-secondarynamenode-mathon-Y430P.out starting?jobtracker,?logging?to?/opt/hadoop-1.2.1/libexec/../logs/hadoop-root-jobtracker-mathon-Y430P.out root@localhost's?password:? localhost:?starting?tasktracker,?logging?to?/opt/hadoop-1.2.1/libexec/../logs/hadoop-root-tasktracker-mathon-Y430P.out root@mathon-Y430P:/opt/hadoop-1.2.1/bin#?jps 16119?Jps 15449?NameNode 15878?JobTracker 15787?SecondaryNameNode root@mathon-Y430P:/opt/hadoop-1.2.1/bin#后來我看了日志文件，貌似是ssh沒有配置好，我當(dāng)時直接安裝了ssh，沒有配置，我也不知道域名服務(wù)器是啥，請問大神怎么配置，謝謝了，下面是日志信息2016-04-05?10:43:08,767?INFO?org.apache.hadoop.hdfs.server.datanode.DataNode:?STARTUP_MSG:? /************************************************************ STARTUP_MSG:?Starting?DataNode STARTUP_MSG:???host?=?java.net.UnknownHostException:?mathon-Y430P:?mathon-Y430P:?未知的名稱或服務(wù) STARTUP_MSG:???args?=?[] STARTUP_MSG:???version?=?1.2.1 STARTUP_MSG:???build?=?https://svn.apache.org/repos/asf/hadoop/common/branches/branch-1.2?-r?1503152;?compiled?by?'mattf'?on?Mon?Jul?22?15:23:09?PDT?2013 STARTUP_MSG:???java?=?1.7.0_95 ************************************************************/ 2016-04-05?10:43:08,892?INFO?org.apache.hadoop.metrics2.impl.MetricsConfig:?loaded?properties?from?hadoop-metrics2.properties 2016-04-05?10:43:08,900?INFO?org.apache.hadoop.metrics2.impl.MetricsSourceAdapter:?MBean?for?source?MetricsSystem,sub=Stats?registered. 2016-04-05?10:43:08,906?ERROR?org.apache.hadoop.metrics2.impl.MetricsSystemImpl:?Error?getting?localhost?name.?Using?'localhost'... java.net.UnknownHostException:?mathon-Y430P:?mathon-Y430P:?未知的名稱或服務(wù) at?java.net.InetAddress.getLocalHost(InetAddress.java:1496) at?org.apache.hadoop.metrics2.impl.MetricsSystemImpl.getHostname(MetricsSystemImpl.java:481) at?org.apache.hadoop.metrics2.impl.MetricsSystemImpl.configureSystem(MetricsSystemImpl.java:412) at?org.apache.hadoop.metrics2.impl.MetricsSystemImpl.configure(MetricsSystemImpl.java:408) at?org.apache.hadoop.metrics2.impl.MetricsSystemImpl.start(MetricsSystemImpl.java:152) at?org.apache.hadoop.metrics2.impl.MetricsSystemImpl.init(MetricsSystemImpl.java:133) at?org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.init(DefaultMetricsSystem.java:40) at?org.apache.hadoop.metrics2.lib.DefaultMetricsSystem.initialize(DefaultMetricsSystem.java:50) at?org.apache.hadoop.hdfs.server.datanode.DataNode.instantiateDataNode(DataNode.java:1650) at?org.apache.hadoop.hdfs.server.datanode.DataNode.createDataNode(DataNode.java:1669) at?org.apache.hadoop.hdfs.server.datanode.DataNode.secureMain(DataNode.java:1795) at?org.apache.hadoop.hdfs.server.datanode.DataNode.main(DataNode.java:1812) Caused?by:?java.net.UnknownHostException:?mathon-Y430P:?未知的名稱或服務(wù) at?java.net.Inet6AddressImpl.lookupAllHostAddr(Native?Method) at?java.net.InetAddress$1.lookupAllHostAddr(InetAddress.java:922) at?java.net.InetAddress.getAddressesFromNameService(InetAddress.java:1316) at?java.net.InetAddress.getLocalHost(InetAddress.java:1492) ...?11?more