[HADOOP-529] SequenceFile fails task with NullPointerException in codec initialization

• Type: Bug
• Status: Closed
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 0.6.0
• Fix Version/s: 0.6.1
• Assignee: Owen O'Malley
• Reporter: Sanjay Dahiya
• Created: 13/Sep/06 14:45
• Updated: 08/Jul/09 16:51
• Resolved: 13/Sep/06 17:04

Description

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)