[HADOOP-7298] Add test utility for writing multi-threaded tests

• Type: Test
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.22.0
• Fix Version/s: 0.22.0, 0.23.0
• Component/s: test
• Hadoop Flags: Reviewed
• Assignee: Todd Lipcon
• Reporter: Todd Lipcon
• Created: 18/May/11 05:20
• Updated: 15/Nov/11 00:50
• Resolved: 25/Jul/11 21:11

Description

A lot of our tests spawn off multiple threads in order to check various synchronization issues, etc. It's often tedious to write these kinds of tests because you have to manually propagate exceptions back to the main thread, etc.

In HBase we have developed a testing utility which makes writing these kinds of tests much easier. I'd like to copy that utility into Hadoop so we can use it here as well.

Issue Links

• blocks: MAPREDUCE-1347 Missing synchronization in MultipleOutputFormat