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

0 votes
asked Jan 5, 2010 by michal-bernhard

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 command.

9 Answers

0 votes
answered Jan 5, 2010 by xxx

How about: mvn -DMAVEN_OPTS=-Xmx1024m jetty:run

0 votes
answered Jan 5, 2010 by danben

It seems like your current approach is correct - when running jetty through maven, jetty is a thread inside the maven process. So increasing maven's heap will increase jetty's heap.

How are you setting MAVEN_OPTS?

One example I found looks like this: MAVEN_OPTS='-Xmx256m -Xms10m' mvn clean jetty:run

Note that MAVEN_OPTS is an environment variable here, and not passed to the JVM (who wouldn't know what to do with it).

0 votes
answered Jan 5, 2010 by michal-bernhard

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).

0 votes
answered Jan 2, 2012 by doredson

The plugin allows you to specify jvmArgs like this:

        <connector implementation="org.eclipse.jetty.server.nio.SelectChannelConnector">
0 votes
answered Jan 14, 2012 by matthew-farwell

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.

0 votes
answered Jan 5, 2013 by binita-bharati

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'
mvn jetty:run &
0 votes
answered Jan 14, 2014 by user2663609

you can use to pass -Xmx argument like;

                <jvmArgs>-Xmx -Xms -XX:PermSize= -XX:MaxPermSize= -XX:+HeapDumpOnOutOfMemoryError</jvmArgs>

0 votes
answered Jan 25, 2015 by chris-ritchie

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

mvn clean install -DargLine="-Xmx1524m"
0 votes
answered Jan 21, 2016 by peter-rader

There is no way using the commandline. But you could copy the mvn.cmd / to mvnhp.cmd and change the line

%MAVEN_JAVA_EXE% %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %CLASSWORLDS_JAR% "-Dclassworlds.conf=%M2_HOME%\bin\m2.conf" "-Dmaven.home=%M2_HOME%" "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %CLASSWORLDS_LAUNCHER% %MAVEN_CMD_LINE_ARGS%


%MAVEN_JAVA_EXE% -Xmx1024m %JVM_CONFIG_MAVEN_PROPS% %MAVEN_OPTS% %MAVEN_DEBUG_OPTS% -classpath %CLASSWORLDS_JAR% "-Dclassworlds.conf=%M2_HOME%\bin\m2.conf" "-Dmaven.home=%M2_HOME%" "-Dmaven.multiModuleProjectDirectory=%MAVEN_PROJECTBASEDIR%" %CLASSWORLDS_LAUNCHER% %MAVEN_CMD_LINE_ARGS%
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