java.io.IOException: Cannot join values on null key. Did you specify a key column that exists?

Stack Overflow | Mahesh | 4 months ago
  1. 0

    Sqoop merge issue - Hortonworks

    Stack Overflow | 4 months ago | Mahesh
    java.io.IOException: Cannot join values on null key. Did you specify a key column that exists?
  2. 0
    Download the winutils.exe for your Hadoop version: https://github.com/steveloughran/winutils . Save it to HADOOP_HOME/bin
  3. 0

    Issue with Hudson/Jenkins pulling from a CVS repo

    Stack Overflow | 6 years ago | Haphazard
    java.io.IOException: No such directory exists. Did you specify the correct branch? Perhaps you specified a tag: c:\ <em>path</em>\workspace</p> <p>at hudson.scm.CVSSCM.archive(CVSSCM.java:474)
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  5. 0
    Check for bad records in the input data (like '(null)')
  6. 0
    Bad input data (not properly separated)

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    Root Cause Analysis

    1. java.io.IOException

      Cannot join values on null key. Did you specify a key column that exists?

      at org.apache.sqoop.mapreduce.MergeMapperBase.processRecord()
    2. org.apache.sqoop
      MergeTextMapper.map
      1. org.apache.sqoop.mapreduce.MergeMapperBase.processRecord(MergeMapperBase.java:79)
      2. org.apache.sqoop.mapreduce.MergeTextMapper.map(MergeTextMapper.java:58)
      3. org.apache.sqoop.mapreduce.MergeTextMapper.map(MergeTextMapper.java:34)
      3 frames
    3. Hadoop
      YarnChild$2.run
      1. org.apache.hadoop.mapreduce.Mapper.run(Mapper.java:146)
      2. org.apache.hadoop.mapred.MapTask.runNewMapper(MapTask.java:787)
      3. org.apache.hadoop.mapred.MapTask.run(MapTask.java:341)
      4. org.apache.hadoop.mapred.YarnChild$2.run(YarnChild.java:168)
      4 frames
    4. Java RT
      Subject.doAs
      1. java.security.AccessController.doPrivileged(Native Method)
      2. javax.security.auth.Subject.doAs(Subject.java:422)
      2 frames
    5. Hadoop
      UserGroupInformation.doAs
      1. org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1657)
      1 frame
    6. Hadoop
      YarnChild.main
      1. org.apache.hadoop.mapred.YarnChild.main(YarnChild.java:162)
      1 frame