How to control VM arguments for maven-jetty-plugin?

Question

How to set VM arguments for Jetty run from maven-jetty-plugin?

For example, I need to pass -Xmx arguments to Jetty run by the mvn jetty:run

Answer 1

With more recent versions of the maven-jetty-plugin, you can use mvn:run-forked. The option jvmArgs will allow you to set -Xmx etc.

For more information, see: jetty:run-forked : Running an unassembled webapp in a separate jvm.

I think the original issue was Starting Jetty in separate JVM.

Answer 2

you can use to pass -Xmx argument like;

<plugin>
            <groupId>org.eclipse.jetty</groupId>
            <artifactId>jetty-maven-plugin</artifactId>
            <version></version>
            <configuration>
                <jvmArgs>-Xmx -Xms -XX:PermSize= -XX:MaxPermSize= -XX:+HeapDumpOnOutOfMemoryError</jvmArgs>
                <scanIntervalSeconds>1</scanIntervalSeconds>
                <stopKey>stop-jetty</stopKey>
                <stopPort>9999</stopPort>
                <systemProperties>
                    <systemProperty>
                        <name>jetty.port</name>
                        <value>9090</value>
                    </systemProperty>
                    <systemProperty>
                        <name>spring.profiles.active</name>
                        <value></value>
                    </systemProperty>
                </systemProperties>

                <webApp>
                    <contextPath>/</contextPath>
                </webApp>
            </configuration>
        </plugin>

Answer 3

To specify vm arguments via the command line (as originally asked) you can do the following:

mvn clean install -DargLine="-Xmx1524m" 

Answer 4

On Linux/Unix

export MAVEN_OPTS="-Xmx256m" && mvn clean install jetty:run

will do the trick

Answer 5

The <jvmArgs> param mentioned here : Maven jetty plugin didn't work for me .

Maven version : Apache Maven 3.0.3

Jetty Maven plugin version : jetty-maven-plugin:8.1.10.v20130312

This worked :

MAVEN_OPTS='-Xmx4096m -Xms4096m'
export MAVEN_OPTS
mvn jetty:run &

Answer 6

The enviroment variable MAVEN_OPTS is the answer. The string content of MAVEN_OPTS is passed to JVM (java.exe).

• Linux: in shell type export MAVEN_OPTS=....
• Windows: in shell (cmd.exe) type set MAVEN_OPTS=...

For example: on Windows set MAVEN_OPTS="-Xmx1024m" sets the heap size of the Maven process to 1024mb.

Update (01.04.2013): Pass it directly to Jetty.

Matthew Farwell (please upvote his answer to give him credit) comes with the solution of using a forked JVM process to run Jetty which is a new feature of the Jetty plugin. This is a better solution as the former runs inside same JVM process as Maven (thus shares memory).