Add Log4j2 JsonTemplateLayout support for JSON log output#9209
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juanluisrp wants to merge 2 commits intomainfrom
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Add Log4j2 JsonTemplateLayout support for JSON log output#9209juanluisrp wants to merge 2 commits intomainfrom
juanluisrp wants to merge 2 commits intomainfrom
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Add the log4j-layout-template-json dependency and a new log4j2-json.xml configuration file that uses JsonTemplateLayout to produce structured JSON logs. Each log event includes @timestamp, level, loggerName, message, and exception fields suitable for ingestion by ELK stack or similar log aggregation tools. The file naming convention (log4j2-json.xml) makes the "JSON" option automatically available in the Admin Settings log level dropdown via the existing LoggingApi regex discovery mechanism. Harvester logs retain their existing PatternLayout as they are consumed separately.
Document Log4j2 configuration structure (appenders, pattern layout, log rotation), harvester logging via routing appender, all available logger modules, JSON logging sample output, custom log configuration creation, REST API endpoints, and troubleshooting tips. Also fix the log level preset list to match actual configuration files (PROD, INDEX, DEV, TEST, JSON — there is no SEARCH preset).
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Summary
log4j-layout-template-jsondependency to produce structured JSON logs via Log4j2'sJsonTemplateLayoutlog4j2-json.xmlconfiguration file that automatically appears as "JSON" in the Admin Settings log level dropdown (via existingLoggingApiregex discovery)@timestamp,level,loggerName,message, andexceptionfields, suitable for ELK stack ingestionPatternLayoutas they are consumed separatelyTest plan
log4j-layout-template-json-2.17.2.jarappears inweb/target/geonetwork/WEB-INF/lib/log4j2-json.xmlappears inweb/target/geonetwork/WEB-INF/classes/