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From "Patrick Hunt (Created) (JIRA)" <j...@apache.org>
Subject [jira] [Created] (HADOOP-8149) cap space usage of default log4j rolling policy
Date Wed, 07 Mar 2012 19:52:57 GMT
cap space usage of default log4j rolling policy 
------------------------------------------------

                 Key: HADOOP-8149
                 URL: https://issues.apache.org/jira/browse/HADOOP-8149
             Project: Hadoop Common
          Issue Type: Improvement
          Components: conf
            Reporter: Patrick Hunt


I've seen several critical production issues because logs are not automatically removed after
some time and accumulate. Changes to Hadoop's default log4j file appender would help with
this.

I recommend we move to an appender which:

1) caps the max file size (configurable)
2) caps the max number of files to keep (configurable)
3) uses rolling file appender rather than DRFA, see the warning here:
http://logging.apache.org/log4j/1.2/apidocs/org/apache/log4j/DailyRollingFileAppender.html
Specifically: "DailyRollingFileAppender has been observed to exhibit synchronization issues
and data loss."

We'd lose (based on the default log4j configuration) the daily rolling aspect, however increase
reliability.


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