Retrying connect to server: 0.0.0.0/0.0.0.0:10020

[sambt22022517]

I have cloned your repo and run base on your readme. But i got an error like this:

2024-05-24 15:43:41,663 INFO mapred.ClientServiceDelegate: Application state is completed. FinalApplicationStatus=FAILED. Redirecting to job history server
2024-05-24 15:43:42,664 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 0 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2024-05-24 15:43:43,665 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 1 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2024-05-24 15:43:44,665 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 2 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2024-05-24 15:43:45,666 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 3 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2024-05-24 15:43:46,667 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 4 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2024-05-24 15:43:47,667 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 5 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2024-05-24 15:43:48,668 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 6 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2024-05-24 15:43:49,670 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 7 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2024-05-24 15:43:50,672 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 8 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
2024-05-24 15:43:51,674 INFO ipc.Client: Retrying connect to server: 0.0.0.0/0.0.0.0:10020. Already tried 9 time(s); retry policy is RetryUpToMaximumCountWithFixedSleep(maxRetries=10, sleepTime=1000 MILLISECONDS)
Exception in thread "main" java.io.IOException: java.net.ConnectException: Your endpoint configuration is wrong; For more details see:  http://wiki.apache.org/hadoop/UnsetHostnameOrPort
        at org.apache.hadoop.mapred.ClientServiceDelegate.invoke(ClientServiceDelegate.java:345)
        at org.apache.hadoop.mapred.ClientServiceDelegate.getTaskCompletionEvents(ClientServiceDelegate.java:398)
        at org.apache.hadoop.mapred.YARNRunner.getTaskCompletionEvents(YARNRunner.java:879)
        at org.apache.hadoop.mapreduce.Job$6.run(Job.java:734)
        at org.apache.hadoop.mapreduce.Job$6.run(Job.java:731)
        at java.base/java.security.AccessController.doPrivileged(Native Method)
        at java.base/javax.security.auth.Subject.doAs(Subject.java:423)
        at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1899)
        at org.apache.hadoop.mapreduce.Job.getTaskCompletionEvents(Job.java:731)
        at org.apache.hadoop.mapreduce.Job.monitorAndPrintJob(Job.java:1760)
        at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1699)
        at NB.main(NB.java:303)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.apache.hadoop.util.RunJar.run(RunJar.java:328)
        at org.apache.hadoop.util.RunJar.main(RunJar.java:241)
Caused by: java.net.ConnectException: Your endpoint configuration is wrong; For more details see:  http://wiki.apache.org/hadoop/UnsetHostnameOrPort
        at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
        at java.base/jdk.internal.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
        at java.base/java.lang.reflect.Constructor.newInstance(Constructor.java:490)
        at org.apache.hadoop.net.NetUtils.wrapWithMessage(NetUtils.java:930)
        at org.apache.hadoop.net.NetUtils.wrapException(NetUtils.java:841)
        at org.apache.hadoop.ipc.Client.getRpcResponse(Client.java:1571)
        at org.apache.hadoop.ipc.Client.call(Client.java:1513)
        at org.apache.hadoop.ipc.Client.call(Client.java:1410)
        at org.apache.hadoop.ipc.ProtobufRpcEngine2$Invoker.invoke(ProtobufRpcEngine2.java:258)
        at org.apache.hadoop.ipc.ProtobufRpcEngine2$Invoker.invoke(ProtobufRpcEngine2.java:139)
        at com.sun.proxy.$Proxy17.getTaskAttemptCompletionEvents(Unknown Source)
        at org.apache.hadoop.mapreduce.v2.api.impl.pb.client.MRClientProtocolPBClientImpl.getTaskAttemptCompletionEvents(MRClientProtocolPBClientImpl.java:179)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at org.apache.hadoop.mapred.ClientServiceDelegate.invoke(ClientServiceDelegate.java:326)
        ... 17 more
Caused by: java.net.ConnectException: Connection refused
        at java.base/sun.nio.ch.SocketChannelImpl.checkConnect(Native Method)
        at java.base/sun.nio.ch.SocketChannelImpl.finishConnect(SocketChannelImpl.java:777)
        at org.apache.hadoop.net.SocketIOWithTimeout.connect(SocketIOWithTimeout.java:205)
        at org.apache.hadoop.net.NetUtils.connect(NetUtils.java:600)
        at org.apache.hadoop.ipc.Client$Connection.setupConnection(Client.java:652)
        at org.apache.hadoop.ipc.Client$Connection.setupIOstreams(Client.java:773)
        at org.apache.hadoop.ipc.Client$Connection.access$3800(Client.java:347)
        at org.apache.hadoop.ipc.Client.getConnection(Client.java:1632)
        at org.apache.hadoop.ipc.Client.call(Client.java:1457)
        ... 27 more

I have googled but found no solution. Can you help me ?

[Coursal]

Hi. I do not know if you used the same versions as described in the README, but it seems like the hostname configuration is missing from your setup:

https://cwiki.apache.org/confluence/display/HADOOP2/UnsetHostnameOrPort

I suppose you are trying to run this locally in a single machine so, the regular hostname (127.0.0.1) is not set. Take a look at what this comment here says (ignore the overwriting for 0.0.0.0):

https://stackoverflow.com/a/64611530