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Posted to common-issues@hadoop.apache.org by "Patrick Hunt (Updated) (JIRA)" <ji...@apache.org> on 2012/03/07 20:54:58 UTC
[jira] [Updated] (HADOOP-8149) cap space usage of default log4j
rolling policy
[ https://issues.apache.org/jira/browse/HADOOP-8149?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Patrick Hunt updated HADOOP-8149:
---------------------------------
Attachment: HADOOP-8149.patch
The attached patch demonstrates the changes I'm suggesting.
I also noticed that the package/template log4j file was out of sync somewhat with the main file, I attempted to rectify this (lmk if that's not correct).
> 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
> Attachments: HADOOP-8149.patch
>
>
> 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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