Edit your pom.xml file and set the scanIntervalSeconds param to 0, this will turn off Jetty's internal reloading. It should look like this:
<plugin>
  <groupId>org.mortbay.jetty</groupId>
  <artifactId>jetty-maven-plugin</artifactId>
  <configuration>
    <scanIntervalSeconds>0</scanIntervalSeconds>
  </configuration>
</plugin>

Run java -jar $AGENT_PATH_UNIX to generate the jrebel-bootstrap.jar using the JVM you will run the application with.

Add the following line to the MAVEN_OPTS environment variable:

-noverify -Xbootclasspath/p:$BOOTSTRAP_PATH_UNIX:$AGENT_PATH_UNIX

To do it in the console:

  > java -jar $AGENT_PATH_UNIX
  > export MAVEN_OPTS="-noverify -Xbootclasspath/p:$BOOTSTRAP_PATH_UNIX:$AGENT_PATH_UNIX $MAVEN_OPTS"
  > mvn jetty:run