[jira] [Created] (SOLR-15610) Support json formatted logging via conf: add log4j-layout-template-json to 'server'

["Chris M. Hostetter (Jira)" <ji...@apache.org>]

Chris M. Hostetter created SOLR-15610:
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             Summary: Support json formatted logging via conf: add log4j-layout-template-json to 'server'
                 Key: SOLR-15610
                 URL: https://issues.apache.org/jira/browse/SOLR-15610
             Project: Solr
          Issue Type: Improvement
      Security Level: Public (Default Security Level. Issues are Public)
            Reporter: Chris M. Hostetter
            Assignee: Chris M. Hostetter


JSON Formatted logging is becoming wide spread enough that it seems like we should support it as an option in Solr.

Assuming we upgrade to log4j >= 2.14.0  (SOLR-15609) then this becomes _possible_ for people to do by:
 # downloading the {{log4j-layout-template-json.jar}} that corresponds with the lof4j version used by their solr version
 # include the {{log4j-layout-template-json.jar}} in the (jetty) classpath via {{SOLR_OPTS}} (can't be loaded as a solr plugin because it needs to be used on startup)
 # specify their own {{LOG4J_PROPS}} file that configures log4j to use a {{JsonTemplateLayout}}

..but steps #1 and #2 are a bit hairy.  Particularly step #1 as it means every time users upgrade solr they have to pay careful attention to if/when the log4j deps change.

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I would like to propose that we make this easier, by adding {{log4j-layout-template-json}} as a dependency for the "server" module, so that it is available out of the box when running solr – that way JSON logging can be enabled easily with a simple {{LOG4J_PROPS}} change.



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