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From "Sanjay Dahiya (JIRA)" <j...@apache.org>
Subject [jira] Created: (HADOOP-529) SequenceFile fails task with NullPointerException in code initialization
Date Wed, 13 Sep 2006 14:46:22 GMT
SequenceFile fails task with NullPointerException in code initialization
------------------------------------------------------------------------

                 Key: HADOOP-529
                 URL: http://issues.apache.org/jira/browse/HADOOP-529
             Project: Hadoop
          Issue Type: Bug
          Components: mapred
    Affects Versions: 0.6.0
            Reporter: Sanjay Dahiya
            Priority: Blocker
             Fix For: 0.6.1


Sequence file fails in following block of code in 0.6 hadoop ( Sep 13th trunk ) - 
      if (decompress) {
        valInFilter = this.codec.createInputStream(valBuffer);   ---> throws NullPointerException

this.codec is apparently not initialized in 
      if (version >= CUSTOM_COMPRESS_VERSION && this.decompress) {    
        try {
          this.codec = (CompressionCodec)  <---- Init code. 

and is used later. It should probably check for version also before using the this.codec.




2006-09-13 07:37:55,010 INFO org.apache.hadoop.mapred.TaskInProgress: Error from task_0003_m_001601_0:
java.lang.NullPointerException
        at org.apache.hadoop.io.SequenceFile$Reader.init(SequenceFile.java:1001)
        at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:933)
        at org.apache.hadoop.io.SequenceFile$Reader.<init>(SequenceFile.java:924)
        at org.apache.hadoop.mapred.SequenceFileRecordReader.<init>(SequenceFileRecordReader.java:37)
        at org.apache.hadoop.mapred.SequenceFileInputFormat.getRecordReader(SequenceFileInputFormat.java:53)
        at org.apache.hadoop.mapred.MapTask.run(MapTask.java:175)
        at org.apache.hadoop.mapred.TaskTracker$Child.main(TaskTracker.java:1066)


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