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    Expert tip

    This was a bug at HBase 1.0.1, it has been patched, so an update to 1.0.2 or further should solve the problem. URL for the Jira thread: https://goo.gl/c5oa6f

Solutions on the web

via Stack Overflow by Bond
, 1 year ago
JA006: Call From ubuntu/192.168.1.115 to localhost:54311 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
via GitHub by trumboosahil
, 2 years ago
JA006: Call From quickstart.cloudera/127.0.0.1 to quickstart.cloudera:8021 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
via Stack Overflow by Marko
, 3 weeks ago
JA006: Call From master02.novalocal/192.168.111.52 to master02.novalocal:8032 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
via gauravkohli.com by Unknown author, 2 years ago
java.net.ConnectException: Connection refused	at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)	at sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)	at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)	at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:530)	at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:494)	at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:607)	at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:705)	at org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:368)	at org.apache.hadoop.ipc.Client.getConnection(Client.java:1521)	at org.apache.hadoop.ipc.Client.call(Client.java:1438)	at org.apache.hadoop.ipc.Client.call(Client.java:1399)	at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:232)	at com.sun.proxy.$Proxy35.getDelegationToken(Unknown Source)	at org.apache.hadoop.yarn.api.impl.pb.client.ApplicationClientProtocolPBClientImpl.getDelegationToken(ApplicationClientProtocolPBClientImpl.java:306)	at sun.reflect.GeneratedMethodAccessor31.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:187)	at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)	at com.sun.proxy.$Proxy36.getDelegationToken(Unknown Source)	at org.apache.hadoop.yarn.client.api.impl.YarnClientImpl.getRMDelegationToken(YarnClientImpl.java:486)	at org.apache.hadoop.mapred.ResourceMgrDelegate.getDelegationToken(ResourceMgrDelegate.java:174)	at org.apache.hadoop.mapred.YARNRunner.getDelegationToken(YARNRunner.java:221)	at org.apache.hadoop.mapreduce.Cluster.getDelegationToken(Cluster.java:400)	at org.apache.hadoop.mapred.JobClient$16.run(JobClient.java:1203)	at org.apache.hadoop.mapred.JobClient$16.run(JobClient.java:1200)	at java.security.AccessController.doPrivileged(Native Method)	at javax.security.auth.Subject.doAs(Subject.java:422)	at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)	at org.apache.hadoop.mapred.JobClient.getDelegationToken(JobClient.java:1199)	at org.apache.oozie.service.HadoopAccessorService.createJobClient(HadoopAccessorService.java:377)	at org.apache.oozie.action.hadoop.JavaActionExecutor.createJobClient(JavaActionExecutor.java:956)	at org.apache.oozie.action.hadoop.JavaActionExecutor.submitLauncher(JavaActionExecutor.java:712)	at org.apache.oozie.action.hadoop.JavaActionExecutor.start(JavaActionExecutor.java:913)	at org.apache.oozie.command.wf.ActionStartXCommand.execute(ActionStartXCommand.java:211)	at org.apache.oozie.command.wf.ActionStartXCommand.execute(ActionStartXCommand.java:59)	at org.apache.oozie.command.XCommand.call(XCommand.java:277)	at org.apache.oozie.service.CallableQueueService$CompositeCallable.call(CallableQueueService.java:326)	at org.apache.oozie.service.CallableQueueService$CompositeCallable.call(CallableQueueService.java:255)	at org.apache.oozie.service.CallableQueueService$CallableWrapper.run(CallableQueueService.java:175)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)