[MAHOUT-1399] Silence logging noise from Mahout Jobs

• Type: Improvement
• Status: Closed
• Priority: Trivial
• Resolution: Fixed
• Affects Version/s: 0.8
• Fix Version/s: 0.9
• Component/s: classic
• Assignee: Suneel Marthi
• Reporter: Frank Scholten
• Created: 19/Jan/14 21:15
• Updated: 31/Jan/24 22:14
• Resolved: 27/Jan/14 01:49

Description

Mahout jobs produce a lot of output on the command line and log messages like these below are distracting:

attempt_201311181700_0002_m_000000_0: SLF4J: Class path contains multiple SLF4J bindings.
attempt_201311181700_0002_m_000000_0: SLF4J: Found binding in [jar:file:/home/hadoop/lib/slf4j-log4j12-1.7.4.jar!/org/slf4j/impl/StaticLoggerBinder.class]
attempt_201311181700_0002_m_000000_0: SLF4J: Found binding in [jar:file:/mnt/var/lib/hadoop/mapred/taskTracker/hadoop/jobcache/job_201311181700_0002/jars/job.jar!/org/slf4j/impl/StaticLoggerBinder.class]
attempt_201311181700_0002_m_000000_0: SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
attempt_201311181700_0002_m_000000_0: SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]

Let's silence log messages like these that do not provide information about the Mahout job itself. If you have more instances of superfluous logging add this to the issue.

Issue Links

• is related to: MAHOUT-1111 Logging bindings not working in current trunk as of github 2012-November-9 18:41
• is related to: MAHOUT-1118 SLF4J Log4j bindings are messed up causing examples to fail