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https://issues.apache.org/jira/browse/SOLR-1145?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12721783#action_12721783
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Mark Miller commented on SOLR-1145:
-----------------------------------

I see your point Hoss.

But at the same time, this is a special debug log that I would likely want to 
see only when I specifically turn it on to debug (usually for a Lucene dev to 
look at). Likely I just want to see the log in isolation - Mike M will prob 
have a hard time looking through it mixed in with all of the Solr logging :)

Now you can do that with log4j, but its a a hassle. Youd have to setup a config 
that captured the right package, and setup a file for it to write to... and it 
would likly be a hassle for people when I said, hey just turn on the 
IndexWriter debug stream, and setup your logging config to isolate it to a 
single file, and ...

And it just seems like you would almost never want the info dispersed with 
everything else in the standard log.

TimeLoggingPrintStream isnt really to reinvent logging - its just to shove in a 
timestamp as I guess Lucene doesn't.

So, I see your point, and I'm not really arguing against yet (Likely you have 
good counter points), but thats the way I see it at the moment...

> Patch to set IndexWriter.defaultInfoStream from solr.xml
> --------------------------------------------------------
>
>                 Key: SOLR-1145
>                 URL: https://issues.apache.org/jira/browse/SOLR-1145
>             Project: Solr
>          Issue Type: Improvement
>            Reporter: Chris Harris
>             Fix For: 1.4
>
>         Attachments: SOLR-1145.patch, SOLR-1145.patch, SOLR-1145.patch
>
>
> Lucene IndexWriters use an infoStream to log detailed info about indexing 
> operations for debugging purpose. This patch is an extremely simple way to 
> allow logging this info to a file from within Solr: After applying the patch, 
> set the new "defaultInfoStreamFilePath" attribute of the solr element in 
> solr.xml to the path of the file where you'd like to save the logging 
> information.
> Note that, in a multi-core setup, all cores will end up logging to the same 
> infoStream log file. This may not be desired. (But it does justify putting 
> the setting in solr.xml rather than solrconfig.xml.)

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