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https://issues.apache.org/jira/browse/SOLR-8186?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15513166#comment-15513166
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Shawn Heisey commented on SOLR-8186:
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bq. Checks that log4j is actually bound by slf4j
Would this mean that somebody who changes their logging jars on purpose gets a
warning?
Note that I am not actually opposed to assuming slf4j->log4j (and eventually
log4j2) in what we incorporate into Solr, particularly as we move to making a
standalone application. Taking away the user's choice of logging framework
would allow us to control logging more effectively from the admin UI.
> 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 Høydahl
> 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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