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From "tesmai4@gmail.com" <tesm...@gmail.com>
Subject java.net.UnknownHostException on one node only
Date Sun, 22 Feb 2015 20:51:27 GMT
I am getting java.net.UnknownHost exception continuously on one node Hadoop
MApReduce execution.

That node is accessible via SSH. This node is shown in "yarn node -list"
and "hadfs dfsadmin -report" queries.

Below is the log from execution....

15/02/22 20:17:42 INFO mapreduce.Job: Task Id :
attempt_1424622614381_0008_m_000043_0, Status : FAILED
Container launch failed for container_1424622614381_0008_01_000016 :
java.lang.IllegalArgumentException: *java.net.UnknownHostException:
101-master10*
at
org.apache.hadoop.security.SecurityUtil.buildTokenService(SecurityUtil.java:373)
at
org.apache.hadoop.security.SecurityUtil.setTokenService(SecurityUtil.java:352)
at
org.apache.hadoop.yarn.util.ConverterUtils.convertFromYarn(ConverterUtils.java:237)
at
org.apache.hadoop.yarn.client.api.impl.ContainerManagementProtocolProxy$ContainerManagementProtocolProxyData.newProxy(ContainerManagementProtocolProxy.java:218)
at
org.apache.hadoop.yarn.client.api.impl.ContainerManagementProtocolProxy$ContainerManagementProtocolProxyData.<init>(ContainerManagementProtocolProxy.java:196)
at
org.apache.hadoop.yarn.client.api.impl.ContainerManagementProtocolProxy.getProxy(ContainerManagementProtocolProxy.java:117)
at
org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl.getCMProxy(ContainerLauncherImpl.java:403)
at
org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl$Container.launch(ContainerLauncherImpl.java:138)
at
org.apache.hadoop.mapreduce.v2.app.launcher.ContainerLauncherImpl$EventProcessor.run(ContainerLauncherImpl.java:369)
at
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
*Caused by: java.net.UnknownHostException: 101-master10*
... 12 more



15/02/22 20:17:44 INFO

Regards,
Tariq

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