Maven Jetty Plugin OutOfMemoryError When Sharing Instance Between Two Web Apps

Question

I'm using the maven jetty plugin to run my two web applications. One web application is spring mvc UI and the other is a RESTful web application. I able to get the two web applications to communicate when I run two separate mvn jetty:run instances and assign different ports. I have successfully deploy both in the same jetty instance using the same port using the below maven pom.xml configuration. I eventually get a ava.lang.OutOfMemoryError: PermGen space error. What is the best workaround for this?

<plugin>
    <groupId>org.mortbay.jetty</groupId>
    <artifactId>jetty-maven-plugin</artifactId>
    <version>7.6.8.v20121106</version>
    <configuration>
        <jvmArgs>-Xmx2024m -Xms2024m</jvmArgs>
        <scanIntervalSeconds>10</scanIntervalSeconds>
        <webApp>
            <contextPath>/</contextPath>
        </webApp>
        <contextHandlers>           
            <contextHandler implementation="org.eclipse.jetty.webapp.WebAppContext">
                <war>../../api/target/main-api.war</war>
                <contextPath>/test</contextPath>
            </contextHandler>
        </contextHandlers> 
    </configuration>
</plugin>

Answer 1

Add following jvm argument, if you get error regarding cannot allocate memory then try using lesser value (128 and 256)

-XX:PermSize=256M -XX:MaxPermSize=512M

Reference

• What is 'PermSize' in Java?
• -XX:MaxPermSize with or without -XX:PermSize