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https://issues.apache.org/jira/browse/SOLR-8186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15513036#comment-15513036
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ASF subversion and git services commented on SOLR-8186:
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Commit eabb05f7fd52e9e9946160101607052b14b2cfe2 in lucene-solr's branch 
refs/heads/master from [~janhoy]
[ https://git-wip-us.apache.org/repos/asf?p=lucene-solr.git;h=eabb05f ]

SOLR-8186: Added robustness to the dynamic log muting logic


> Solr start scripts -- only log to console when running in foreground
> --------------------------------------------------------------------
>
>                 Key: SOLR-8186
>                 URL: https://issues.apache.org/jira/browse/SOLR-8186
>             Project: Solr
>          Issue Type: Improvement
>          Components: scripts and tools
>    Affects Versions: 5.3.1
>            Reporter: Shawn Heisey
>            Assignee: Jan H√łydahl
>              Labels: logging
>             Fix For: 6.3, master (7.0)
>
>         Attachments: SOLR-8186-robustness.patch, SOLR-8186.patch, 
> SOLR-8186.patch
>
>
> Currently the log4j.properties file logs to the console, and the start 
> scripts capture console output to a logfile that never rotates.  This can 
> fill up the disk, and when the logfile is removed, the user might be alarmed 
> by the way their memory statistics behave -- the "cached" memory might have a 
> sudden and very large drop, making it appear to a novice that the huge 
> logfile was hogging their memory.
> The logfile created by log4j is rotated when it gets big enough, so that 
> logfile is unlikely to fill up the disk.
> I propose that we copy the current log4j.properties file to something like 
> log4j-foreground.properties, remove CONSOLE logging in the log4j.properties 
> file, and have the start script use the alternate config file when running in 
> the foreground.  This way users will see the logging output when running in 
> the foreground, but it will be absent when running normally.



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