java.net.UnknownHostException: hadoop: hadoop: Temporary failure in name resolution

thegeekstuff.com | 3 months ago
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    java.net.UnknownHostException: hadoop: hadoop: Temporary failure in name resolution
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    java.net.UnknownHostException: hadoop: hadoop: Temporary failure in name resolution
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    java.net.UnknownHostException: hadoop: hadoop: Temporary failure in name resolution
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    Why does Hadoop give me the UnknownHostException?

    Stack Overflow | 2 years ago | user2585578
    java.net.UnknownHostException: 172-16-23-165.dynapool.nyu.edu: 172-16-23-165.dynapool.nyu.edu: nodename nor servname provided, or not known
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    HIVE VIEW ERROR

    Stack Overflow | 4 years ago | Yogesh Selvaraj
    java.net.UnknownHostException: server-1358839685-az-1-region-a-geo-1.localdomain: server-1358839685-az-1-region-a-geo-1.localdomain

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Root Cause Analysis

  1. java.net.UnknownHostException

    hadoop: hadoop: Temporary failure in name resolution

    at java.net.InetAddress.getLocalHost()
  2. Java RT
    InetAddress.getLocalHost
    1. java.net.InetAddress.getLocalHost(InetAddress.java:1438)
    1 frame
  3. Hadoop
    JobClient$2.run
    1. org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:815)
    2. org.apache.hadoop.mapred.JobClient$2.run(JobClient.java:791)
    2 frames
  4. Java RT
    AccessController.doPrivileged
    1. java.security.AccessController.doPrivileged(Native Method)
    1 frame