SOLR 5.4.1
log files have this entry
log4j:ERROR Could not find value for key log4j.appender.: file
log4j:ERROR Could not instantiate appender named ": file".
Here is my config file and the only thing i have changed is set level to FINEST
in line 3. Otherwise this is the default file.
# Logging level
solr.log=logs
log4j.rootLogger=FINEST,: file, CONSOLE
log4j.appender.CONSOLE=org.apache.log4j.ConsoleAppender
log4j.appender.CONSOLE.layout=org.apache.log4j.EnhancedPatternLayout
log4j.appender.CONSOLE.layout.ConversionPattern=%-4r %-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=100MB
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
log4j.logger.org.apache.zookeeper=WARN
log4j.logger.org.apache.hadoop=WARN
# set to INFO to enable infostream log messages
log4j.logger.org.apache.solr.update.LoggingInfoStream=OFF
