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

• Type: Bug
• Status: Patch Available
• Priority: Major
• Resolution: Unresolved
• Affects Version/s: 2.3.0, 2.4.0
• Component/s: client
• Labels: BB2015-05-RFC
• Assignee: Tsuyoshi Ozawa
• Reporter: Reinis Vicups
• Created: 05/May/14 12:21
• Updated: 27/May/15 09:27

Description

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.