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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