Jason Lowe created MAPREDUCE-4794:
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Summary: DefaultSpeculator generates error messages on normal
shutdown
Key: MAPREDUCE-4794
URL: https://issues.apache.org/jira/browse/MAPREDUCE-4794
Project: Hadoop Map/Reduce
Issue Type: Bug
Components: applicationmaster
Affects Versions: 2.0.1-alpha, 0.23.3
Reporter: Jason Lowe
DefaultSpeculator can log the following error message on a normal shutdown of
the ApplicationMaster:
{noformat}
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
{noformat}
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.
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