hadoop-common-issues mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Kihwal Lee (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HADOOP-8149) cap space usage of default log4j rolling policy
Date Thu, 08 Mar 2012 23:19:58 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-8149?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13225663#comment-13225663
] 

Kihwal Lee commented on HADOOP-8149:
------------------------------------

This is a nice change. There is one thing I want to point out though. There can be external
tools and processes that depend on the daily rolling of logs. It will be better if we let
them continue until they are ready to transition and modify the tools.

There are couple of places in the scripts where values are hardcoded (e.g. hadoop-daemon.sh
and hadoop-env.sh). If we can change these to be dynamic while making RFA to be the default,
we can accommodate the people who want to retain the old behavior by simply letting them have
custom configs. 
                
> 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
>            Assignee: Patrick Hunt
>         Attachments: HADOOP-8149.patch, 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.

--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators: https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira

        

Mime
View raw message