java.io.IOException: java.net.ConnectException: Call From boise.cs.colostate.edu/129.82.46.197 to 0.0.0.0:10020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused at org.apache.hadoop.mapred.ClientServiceDelegate.invoke(ClientServiceDelegate.java:337) at org.apache.hadoop.mapred.ClientServiceDelegate.getTaskCompletionEvents(ClientServiceDelegate.java:389) at org.apache.hadoop.mapred.YARNRunner.getTaskCompletionEvents(YARNRunner.java:582) at org.apache.hadoop.mapreduce.Job$5.run(Job.java:679) at org.apache.hadoop.mapreduce.Job$5.run(Job.java:676)

Stack Overflow | Keith Lewis | 4 months ago
  1. 0

    Hadoop MapReduce error ONLY when running a large dataset - failed on connection exception: java.net.ConnectException: Connection refused; error

    Stack Overflow | 4 months ago | Keith Lewis
    java.io.IOException: java.net.ConnectException: Call From boise.cs.colostate.edu/129.82.46.197 to 0.0.0.0:10020 failed on connection exception: java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused at org.apache.hadoop.mapred.ClientServiceDelegate.invoke(ClientServiceDelegate.java:337) at org.apache.hadoop.mapred.ClientServiceDelegate.getTaskCompletionEvents(ClientServiceDelegate.java:389) at org.apache.hadoop.mapred.YARNRunner.getTaskCompletionEvents(YARNRunner.java:582) at org.apache.hadoop.mapreduce.Job$5.run(Job.java:679) at org.apache.hadoop.mapreduce.Job$5.run(Job.java:676)
  2. 0

    Should I start Hadoop cluster before launching Pig in MapReduce mode?

    Stack Overflow | 2 years ago | Gianluca
    org.apache.pig.backend.datastorage.DataStorageException: ERROR 6007: Unable to check name hdfs://localhost:9000/user/gianluca
  3. 0

    Build and deploy working!

    Google Groups | 2 years ago | Justin Hohner
    java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
  4. Speed up your debug routine!

    Automated exception search integrated into your IDE

  5. 0

    new documentation, and an issue with connecting to the right IP address

    Google Groups | 2 years ago | ben.s.f...@gmail.com
    java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused
  6. 0

    PLEASE HELP TO TROUBLESHOOT MY SETUP

    Google Groups | 2 years ago | Nilakhya Chatterjee
    java.net.ConnectException: Connection refused; For more details see: http://wiki.apache.org/hadoop/ConnectionRefused

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Root Cause Analysis

  1. java.net.ConnectException

    Connection refused at sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)

    at sun.nio.ch.SocketChannelImpl.finishConnect()
  2. Java RT
    SocketChannelImpl.finishConnect
    1. sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:717)
    1 frame
  3. Hadoop
    Client.call
    1. org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:206)
    2. org.apache.hadoop.net.NetUtils.connect(NetUtils.java:530)
    3. org.apache.hadoop.net.NetUtils.connect(NetUtils.java:494)
    4. org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:607)
    5. org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:705)
    6. org.apache.hadoop.ipc.Client$Connection.access$2800(Client.java:368)
    7. org.apache.hadoop.ipc.Client.getConnection(Client.java:1521)
    8. org.apache.hadoop.ipc.Client.call(Client.java:1438)
    8 frames
  4. Java RT
    Constructor.newInstance
    1. java.lang.reflect.Constructor.newInstance(Constructor.java:422)
    1 frame
  5. Hadoop
    ProtobufRpcEngine$Invoker.invoke
    1. org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:791)
    2. org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:731)
    3. org.apache.hadoop.ipc.Client.call(Client.java:1472)
    4. org.apache.hadoop.ipc.Client.call(Client.java:1399)
    5. org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:232)
    5 frames
  6. com.sun.proxy
    $Proxy14.getTaskAttemptCompletionEvents
    1. com.sun.proxy.$Proxy14.getTaskAttemptCompletionEvents(Unknown Source)
    1 frame
  7. hadoop-mapreduce-client-common
    MRClientProtocolPBClientImpl.getTaskAttemptCompletionEvents
    1. org.apache.hadoop.mapreduce.v2.api.impl.pb.client.MRClientProtocolPBClientImpl.getTaskAttemptCompletionEvents(MRClientProtocolPBClientImpl.java:177)
    1 frame
  8. Java RT
    Method.invoke
    1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    2. sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    3. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    4. java.lang.reflect.Method.invoke(Method.java:497)
    4 frames
  9. Hadoop
    ClientServiceDelegate.invoke
    1. org.apache.hadoop.mapred.ClientServiceDelegate.invoke(ClientServiceDelegate.java:323)
    1 frame
  10. Java RT
    Subject.doAs
    1. java.security.AccessController.doPrivileged(Native Method)
    2. javax.security.auth.Subject.doAs(Subject.java:422)
    2 frames
  11. Hadoop
    UserGroupInformation.doAs
    1. org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)
    1 frame
  12. Hadoop
    Job.waitForCompletion
    1. org.apache.hadoop.mapreduce.Job.getTaskCompletionEvents(Job.java:676)
    2. org.apache.hadoop.mapreduce.Job.monitorAndPrintJob(Job.java:1377)
    3. org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1317)
    3 frames
  13. vehicle_efficiency_mr
    EfficiencyJobRunner.main
    1. vehicle_efficiency_mr.EfficiencyJobRunner.main(EfficiencyJobRunner.java:39)
    1 frame
  14. Java RT
    Method.invoke
    1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    2. sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    3. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    4. java.lang.reflect.Method.invoke(Method.java:497)
    4 frames
  15. Hadoop
    RunJar.main
    1. org.apache.hadoop.util.RunJar.run(RunJar.java:221)
    2. org.apache.hadoop.util.RunJar.main(RunJar.java:136)
    2 frames