[HADOOP-7993] Hadoop ignores old-style config options for enabling compressed output

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.23.1
• Fix Version/s: 0.23.1
• Component/s: conf
• Hadoop Flags: Reviewed
• Assignee: Anupam Seth
• Reporter: Anupam Seth
• Created: 25/Jan/12 18:44
• Updated: 05/Mar/12 02:48
• Resolved: 27/Jan/12 03:45

Description

Hadoop seems to ignore the config options even though they are printed as deprecation warnings in the log: mapred.output.compress and
mapred.output.compression.codec

• settings that work on 0.20 but not on 0.23
  mapred.output.compress=true
  mapred.output.compression.codec=org.apache.hadoop.io.compress.BZip2Codec

• settings that work on 0.23
  mapreduce.output.fileoutputformat.compress=true
  mapreduce.output.fileoutputformat.compress.codec=org.apache.hadoop.io.compress.BZip2Codec

This breaks backwards compatibility and causes existing jobs to fail.

This was found to happen due to the JobSubmitter writing out the job.xml file with the old-style configs and can be fixed by handdling deprecation before the file is written out.

Issue Links

• duplicates: MAPREDUCE-3665 Hadoop ignores old-style config options for enabling compressed output
• is cloned by: HADOOP-8021 Hadoop ignores old-style config options for enabling compressed output when passed on from PIG