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Posted to mapreduce-dev@hadoop.apache.org by "Reinis Vicups (JIRA)" <ji...@apache.org> on 2014/05/05 14:23:16 UTC

[jira] [Created] (MAPREDUCE-5876) SequenceFileRecordReader NPE if close() is called before initialize()

Reinis Vicups created MAPREDUCE-5876:
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             Summary: SequenceFileRecordReader NPE if close() is called before initialize()
                 Key: MAPREDUCE-5876
                 URL: https://issues.apache.org/jira/browse/MAPREDUCE-5876
             Project: Hadoop Map/Reduce
          Issue Type: Bug
          Components: client
    Affects Versions: 2.3.0
            Reporter: Reinis Vicups


org.apache.hadoop.mapreduce.lib.input.SequenceFileRecordReader extends org.apache.hadoop.mapreduce.RecordReader which in turn implements java.io.Closeable.

According to java spec the java.io.Closeable#close() has to be idempotent (http://docs.oracle.com/javase/7/docs/api/java/io/Closeable.html) which is not.

An NPE is being thrown if close() method is invoked without previously calling initialize() method. This happens because SequenceFile.Reader in is null.



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