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https://issues.apache.org/jira/browse/SOLR-1145?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12721580#action_12721580
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Hoss Man commented on SOLR-1145:
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adding support for setInfoStream seems like a good idea, but specifying a
filename in the config file and writing a new TimeLoggingPrintStream class
smells like reinventing logging.
It seems like it would be simpler just to add a new boolean "infoStream" config
option, and then leverage the existing logging framework by constructing an
instance of a PrintStream that just proxies to SLF4J when the boolean property
is true. A PrintStream instance that writes to a Logger seems no harder to
implement then an PrintStream that knows how to prepend messages with a
timestamp -- and by using the standard logging framework, solr admins can
customize it however they want.
It looks like someone may have already thought this type of problem through a
lot more indepth then us anyway...
http://bugzilla.slf4j.org/show_bug.cgi?id=110
> 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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