java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected

Apache's JIRA Issue Tracker | Brian Jeltema | 4 years ago
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  1. 0

    [CASSANDRA-5201] Cassandra/Hadoop does not support current Hadoop releases - ASF JIRA

    apache.org | 1 year ago
    java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected
  2. 0

    [CASSANDRA-5201] Cassandra/Hadoop does not support current Hadoop releases - ASF JIRA

    apache.org | 1 year ago
    java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected
  3. 0

    Using Hadoop 0.22.0 with Cassandra results in the stack trace below. It appears that version 0.21+ changed org.apache.hadoop.mapreduce.JobContext from a class to an interface. Exception in thread "main" java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected at org.apache.cassandra.hadoop.ColumnFamilyInputFormat.getSplits(ColumnFamilyInputFormat.java:103) at org.apache.hadoop.mapreduce.JobSubmitter.writeNewSplits(JobSubmitter.java:445) at org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:462) at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:357) at org.apache.hadoop.mapreduce.Job$2.run(Job.java:1045) at org.apache.hadoop.mapreduce.Job$2.run(Job.java:1042) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1153) at org.apache.hadoop.mapreduce.Job.submit(Job.java:1042) at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1062) at MyHadoopApp.run(MyHadoopApp.java:163) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:69) at MyHadoopApp.main(MyHadoopApp.java:82) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.hadoop.util.RunJar.main(RunJar.java:192)

    Apache's JIRA Issue Tracker | 4 years ago | Brian Jeltema
    java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected
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  5. 0

    Using Hadoop 0.22.0 with Cassandra results in the stack trace below. It appears that version 0.21+ changed org.apache.hadoop.mapreduce.JobContext from a class to an interface. Exception in thread "main" java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected at org.apache.cassandra.hadoop.ColumnFamilyInputFormat.getSplits(ColumnFamilyInputFormat.java:103) at org.apache.hadoop.mapreduce.JobSubmitter.writeNewSplits(JobSubmitter.java:445) at org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:462) at org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:357) at org.apache.hadoop.mapreduce.Job$2.run(Job.java:1045) at org.apache.hadoop.mapreduce.Job$2.run(Job.java:1042) at java.security.AccessController.doPrivileged(Native Method) at javax.security.auth.Subject.doAs(Subject.java:415) at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1153) at org.apache.hadoop.mapreduce.Job.submit(Job.java:1042) at org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1062) at MyHadoopApp.run(MyHadoopApp.java:163) at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:69) at MyHadoopApp.main(MyHadoopApp.java:82) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:601) at org.apache.hadoop.util.RunJar.main(RunJar.java:192)

    Apache's JIRA Issue Tracker | 4 years ago | Brian Jeltema
    java.lang.IncompatibleClassChangeError: Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected

    Root Cause Analysis

    1. java.lang.IncompatibleClassChangeError

      Found interface org.apache.hadoop.mapreduce.JobContext, but class was expected

      at org.apache.cassandra.hadoop.ColumnFamilyInputFormat.getSplits()
    2. org.apache.cassandra
      ColumnFamilyInputFormat.getSplits
      1. org.apache.cassandra.hadoop.ColumnFamilyInputFormat.getSplits(ColumnFamilyInputFormat.java:103)
      1 frame
    3. Hadoop
      Job$2.run
      1. org.apache.hadoop.mapreduce.JobSubmitter.writeNewSplits(JobSubmitter.java:445)
      2. org.apache.hadoop.mapreduce.JobSubmitter.writeSplits(JobSubmitter.java:462)
      3. org.apache.hadoop.mapreduce.JobSubmitter.submitJobInternal(JobSubmitter.java:357)
      4. org.apache.hadoop.mapreduce.Job$2.run(Job.java:1045)
      5. org.apache.hadoop.mapreduce.Job$2.run(Job.java:1042)
      5 frames
    4. Java RT
      Subject.doAs
      1. java.security.AccessController.doPrivileged(Native Method)
      2. javax.security.auth.Subject.doAs(Subject.java:415)
      2 frames
    5. Hadoop
      UserGroupInformation.doAs
      1. org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1153)
      1 frame
    6. Hadoop
      Job.waitForCompletion
      1. org.apache.hadoop.mapreduce.Job.submit(Job.java:1042)
      2. org.apache.hadoop.mapreduce.Job.waitForCompletion(Job.java:1062)
      2 frames
    7. Unknown
      MyHadoopApp.run
      1. MyHadoopApp.run(MyHadoopApp.java:163)
      1 frame
    8. Hadoop
      ToolRunner.run
      1. org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:69)
      1 frame
    9. Unknown
      MyHadoopApp.main
      1. MyHadoopApp.main(MyHadoopApp.java:82)
      1 frame
    10. Java RT
      Method.invoke
      1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      2. sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      3. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      4. java.lang.reflect.Method.invoke(Method.java:601)
      4 frames
    11. Hadoop
      RunJar.main
      1. org.apache.hadoop.util.RunJar.main(RunJar.java:192)
      1 frame