20.9. JMS Client Logging
The qpid-java client logging is handled using the Simple Logging Facade for Java (SLF4J). SLF4J is a facade that delegates to other logging systems like log4j or JDK 1.4 logging.
When using the log4j binding, set the log level for
org.apache.qpid. Otherwise log4j will default to DEBUG which will degrade performance considerably due to excessive logging. The recommended logging level for production is WARN.
The following example shows the logging properties used to configure client logging for SLF4J using the log4j binding. These properties can be placed in a
log4j.properties file and placed in the CLASSPATH, or they can be set explicitly using the -Dlog4j.configuration property.
Example 20.3. log4j Logging Properties
log4j.logger.org.apache.qpid=WARN, console
log4j.additivity.org.apache.qpid=false
log4j.appender.console=org.apache.log4j.ConsoleAppender
log4j.appender.console.Threshold=all
log4j.appender.console.layout=org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=%t %d %p [%c{4}] %m%n