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From Webster Homer <>
Subject Re: CDCR logging is Needlessly verbose, fills up the file system fast
Date Fri, 06 Jan 2017 15:21:22 GMT
I figured our problem with the filesystem, by default the root logger is
configured with the CONSOLE logger, which is NOT rotated and eventually
filled up the file system. That doesn't exonerate the CDCR logging problem
though. The thing writes a huge amount of junk to the logs, information
that looks more like Debug and even TRACE level statements. I hope that
this is addressed, and soon! There doesn't seem to be a way to turn it off
either. We want INFO level logging

On Tue, Jan 3, 2017 at 5:10 PM, Shawn Heisey <> wrote:

> On 1/3/2017 1:12 PM, Webster Homer wrote:
> > We use the default file which rolls the log file to
> > solr.log.1, solr.log.2 ... which isn't really the problem. What is
> > also happening is that solr.log.1 gets renamed to
> > solr_log_20170103_1110 with a timestamp as the file name. How do I
> > turn off this behavior? It is not obvious in the file.
> That rename is not done by log4j.  It is done by the bin/solr or
> bin\solr.cmd script just before Solr is started.  Unlike the solr.log.N
> files, those files are not subject to automatic deletion.
> My best guess is that you've got a situation where something external to
> Solr is restarting Solr frequently.  Solr's start script renames
> solr.log to solr_log_DATE_TIME each time it starts.  As far as I am
> aware, Solr does NOT have the ability to restart itself, and the CDCR
> page in the reference guide doesn't mention anything about processes
> being restarted as part of its operation.
> Because the logfiles that you are seeing accumulate are not handled by
> log4j, switching to log4j2 and adding compression will not help.  Moving
> to log4j2 requires a few things to be done on the development side, and
> won't be trivial.
> If your system requires frequent Solr restarts for some reason, then
> you're going to have to take over management of the renamed solr
> logfiles as well, or edit the start script so that it doesn't rename the
> main logfile.  SolrCloud does not deal well with frequent restarts, so
> avoid doing them.
> Thanks,
> Shawn


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