I'm running a java webapp with a simple mvn jetty:run
, using the latest jetty plugin, but I can't seem to find a way to tell jetty to output DEBUG messages to console (for the embedded jetty instance, not the plugin itself). It's currently outputting only WARN and INFO messages. I've tried setting -DDEBUG
and -DVERBOSE
, but they don't do anything. I've already had a look at the documentation, but it doesn't seem to cover this.
Update: OK, I finally got things working and here is what I did.
My understanding is that Jetty 7 doesn't have any dependencies on a particular logging framework, even for the JSP engine since Jetty 7 uses the JSP 2.1 engine. So you can use any logging framework. Here I will use logback.
First add logback-classic
as dependency in the plugin and set the logback.configurationFile
system property to point on a configuration file:
<project>
...
<build>
...
<plugins>
<plugin>
<groupId>org.mortbay.jetty</groupId>
<artifactId>jetty-maven-plugin</artifactId>
<version>7.0.0.pre5</version>
<configuration>
<systemProperties>
<systemProperty>
<name>logback.configurationFile</name>
<value>./src/etc/logback.xml</value>
</systemProperty>
</systemProperties>
</configuration>
<dependencies>
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>0.9.15</version>
</dependency>
</dependencies>
</plugin>
...
</plugins>
</build>
...
</project>
Then add a src/etc/logback.xml
configuration file. Below a minimal configuration:
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<layout class="ch.qos.logback.classic.PatternLayout">
<Pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n</Pattern>
</layout>
</appender>
<root level="debug">
<appender-ref ref="STDOUT"/>
</root>
</configuration>
With this setup, jetty will output DEBUG messages:
$ mvn jetty:run ... 00:31:33.089 [main] DEBUG org.mortbay.log - starting DefaultHandler@145e5a6 00:31:33.089 [main] DEBUG org.mortbay.log - started DefaultHandler@145e5a6 00:31:33.105 [main] DEBUG org.mortbay.log - starting RequestLogHandler@1e80761 00:31:33.106 [main] DEBUG org.mortbay.log - started RequestLogHandler@1e80761 00:31:33.106 [main] DEBUG org.mortbay.log - starting HandlerCollection@1485542 00:31:33.106 [main] DEBUG org.mortbay.log - started HandlerCollection@1485542 00:31:33.106 [main] DEBUG org.mortbay.log - starting org.mortbay.jetty.Server@a010ba 00:31:33.174 [main] DEBUG org.mortbay.log - started org.mortbay.jetty.nio.SelectChannelConnector$1@ee21f5 00:31:33.216 [main] INFO org.mortbay.log - Started [email protected]:8080 00:31:33.217 [main] DEBUG org.mortbay.log - started [email protected]:8080 00:31:33.217 [main] DEBUG org.mortbay.log - started org.mortbay.jetty.Server@a010ba [INFO] Started Jetty Server
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