[MAPREDUCE-4794] DefaultSpeculator generates error messages on normal shutdown

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.23.3, 2.0.1-alpha
• Fix Version/s: 0.23.7, 2.1.0-beta
• Component/s: applicationmaster
• Labels: usability
• Target Version/s: 2.0.3-alpha, 0.23.7
• Assignee: Jason Darrell Lowe
• Reporter: Jason Darrell Lowe
• Created: 14/Nov/12 01:05
• Updated: 03/Sep/14 22:57
• Resolved: 02/Mar/13 03:50

Description

DefaultSpeculator can log the following error message on a normal shutdown of the ApplicationMaster:

2012-11-13 01:35:31,841 ERROR [DefaultSpeculator background processing] org.apache.hadoop.mapreduce.v2.app.speculate.DefaultSpeculator: Background thread returning, interrupted : java.lang.InterruptedException

and in addition for some reason it logs the corresponding backtrace to stdout.

Like the errors fixed in MAPREDUCE-4741, this error message in the syslog and backtrace on stdout can be confusing to users as to whether the job really succeeded.

Issue Links

• relates to: MAPREDUCE-4741 WARN and ERROR messages logged during normal AM shutdown