java.net.ConnectException: Call to master/192.168.137.101:9001 failed on connection exception: java.net.ConnectException: Connection refused
 at org.apache.hadoop.ipc.Client.wrapException(Client.java:1099)
 at org.apache.hadoop.ipc.Client.call(Client.java:1075)
 at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
 at org.apache.hadoop.mapred.$Proxy10.getProtocolVersion(Unknown Source)
 at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:396)
 at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:379)
 at org.apache.hadoop.mapred.JobClient.createRPCProxy(JobClient.java:480)
 at org.apache.hadoop.mapred.JobClient.init(JobClient.java:474)
 at org.apache.hadoop.mapred.JobClient.(JobClient.java:457)
 at org.apache.hadoop.hive.ql.exec.ExecDriver.execute(ExecDriver.java:418)
 at org.apache.hadoop.hive.ql.exec.MapRedTask.execute(MapRedTask.java:137)
 at org.apache.hadoop.hive.ql.exec.Task.executeTask(Task.java:134)
 at org.apache.hadoop.hive.ql.exec.TaskRunner.runSequential(TaskRunner.java:57)
 at org.apache.hadoop.hive.ql.Driver.launchTask(Driver.java:1326)
 at org.apache.hadoop.hive.ql.Driver.execute(Driver.java:1118)
 at org.apache.hadoop.hive.ql.Driver.run(Driver.java:951)
 at org.apache.hadoop.hive.cli.CliDriver.processLocalCmd(CliDriver.java:258)
 at org.apache.hadoop.hive.cli.CliDriver.processCmd(CliDriver.java:215)
 at org.apache.hadoop.hive.cli.CliDriver.processLine(CliDriver.java:406)
 at org.apache.hadoop.hive.cli.CliDriver.run(CliDriver.java:689)
 at org.apache.hadoop.hive.cli.CliDriver.main(CliDriver.java:557)
 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:601)
 at org.apache.hadoop.util.RunJar.main(RunJar.java:156)
Caused by: java.net.ConnectException: Connection refused
 at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
 at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:692)
 at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
 at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:489)
 at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:434)
 at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:560)
 at org.apache.hadoop.ipc.Client$Connection.access$2000(Client.java:184)
 at org.apache.hadoop.ipc.Client.getConnection(Client.java:1206)
 at org.apache.hadoop.ipc.Client.call(Client.java:1050)
 … 24 more
Job Submission failed with exception ‘java.net.ConnectException(Call to master/192.168.137.101:9001 failed on connection exception: java.net.ConnectException: Connection refused)’
FAILED: Execution Error, return code 1 from org.apache.hadoop.hive.ql.exec.MapRedTask

解决方案：执行命令./hadoop namenode -format