lucene/solr/server/resources/log4j.properties

# Default Solr log4j config
# rootLogger log level may be programmatically overridden by -Dsolr.log.level
solr.log=${solr.log.dir}
log4j.rootLogger=INFO, file, CONSOLE

# Console appender will be programmatically disabled when Solr is started with option -Dsolr.log.muteconsole
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.EnhancedPatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p (%t) [%X{collection} %X{shard} %X{replica} %X{core}] %c{1.} %m%n

#- size rotation with log cleanup.
log4j.appender.file=org.apache.log4j.RollingFileAppender
log4j.appender.file.MaxFileSize=4MB
log4j.appender.file.MaxBackupIndex=9

#- File to log to and log format
log4j.appender.file.File=${solr.log}/solr.log
log4j.appender.file.layout=org.apache.log4j.EnhancedPatternLayout
log4j.appender.file.layout.ConversionPattern=%d{yyyy-MM-dd HH:mm:ss.SSS} %-5p (%t) [%X{collection} %X{shard} %X{replica} %X{core}] %c{1.} %m%n

# Adjust logging levels that should differ from root logger
log4j.logger.org.apache.zookeeper=WARN
log4j.logger.org.apache.hadoop=WARN
log4j.logger.org.eclipse.jetty=WARN
log4j.logger.org.eclipse.jetty.server.Server=INFO
log4j.logger.org.eclipse.jetty.server.ServerConnector=INFO

# set to INFO to enable infostream log messages
log4j.logger.org.apache.solr.update.LoggingInfoStream=OFF