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When you encounter a problem or are doing development you should check that the log is configured to store as much information as possible.

 

Error Reporting in Drupal

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Panel

# REPORTING LEVELS: OFF, DEBUG, INFO, WARN, ERROR and FATAL
log.dir=/usr/local/fedora/server/logs/
datestamp=yyyy-MM-dd/HH:mm:ss.SSS/zzz
roll.pattern.hourly=.yyyy-MM-dd.HH
roll.pattern.daily=.yyyy-MM-dd


#djatoka.log -- Default catch-all.
log4j.rootLogger=DEBUG, defaultLog
log4j.appender.defaultLog=org.apache.log4j.DailyRollingFileAppender
log4j.appender.defaultLog.DatePattern=${roll.pattern.daily}
log4j.appender.defaultLog.File=${log.dir}/djatoka.log
log4j.appender.defaultLog.layout=org.apache.log4j.PatternLayout
log4j.appender.defaultLog.layout.ConversionPattern=%d{${datestamp}} [%t] %-5p %m%n

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Apache Logs

The location of the apache error log and what other logs (access, etc) are available will depend on your operating system, apache version, and apache settings. The error log will contain any problems that occurred while processing a request. Errors generated by PHP code that are not caught by Drupal will usually be logged here. The access log will typically contain requests made to apache and if apache denied them access.

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Code Block
less catalina.out

Tomcat Logs

Tomcat logs are typically found in "$CATALINA_HOME/logs". Tomcat logs can be configured in "$CATALINA_HOME/conf/logging.properties", for in-depth information on configuring the logging done by Tomcat, and various webapps consult (http://tomcat.apache.org/tomcat-6.0-doc/logging.html).

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Code Block
handlers = 1catalina.org.apache.juli.FileHandler, 2localhost.org.apache.juli.FileHandler,
3manager.org.apache.juli.FileHandler, 4host-manager.org.apache.juli.FileHandler,
5localhost.org.apache.juli.FileHandler, java.util.logging.ConsoleHandler
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5localhost.org.apache.juli.FileHandler.level = WARNING
5localhost.org.apache.juli.FileHandler.directory = ${catalina.base}/logs
5localhost.org.apache.juli.FileHandler.prefix = solr.
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org.apache.solr.level=INFO
org.apache.solr.handlers=5localhost.org.apache.juli.FileHandler

Microservices

Logging can be configured by modifying islandora_listener.cfg in the Micro-services home directory typically "/opt/islandora_microservices/islandora_listener.cfg".

The level and output file and size of log can be set like so: 

Code Block
[Logging]

file: islandora_listener.log

;Supported levels are DEBUG, INFO, WARNING, ERROR, CRITICAL

level: DEBUG

; The maximum log size in bytes before a log rotation

; a setting of zero means never rotate

max_size: 10485760

; number of backup logs to keep

backup: 5