Running soapui projects parallel

Hi Team,

I am trying to achieve the following,
My current jenkins job which runs all the SOAPUI integration tests is taking around 1hr, where i am running all the soapui projects parallel..is there any easy way to run those projects parallel?

I am doing the following to run the soapui tests programetically..

 @DataProvider
    public Object[][] getSoapuiFiles() throws Exception {
         //returns array of soapui project files path
    }

    @Test(
        dataProvider = "getSoapuiFiles"
      public void runProjectFilesParallel(final String projectFile){
       /// 
       final SoapUITestCaseRunner runner = createRunner();
       runner.setProjectFile(projectFile);
       runner.setTestSuite("test.Suite);
       final boolean result = runner.run();
       ///

}

I can use testNg data provider feature to execute the "runProjectFilesParallel" method in different threads..

But, i am getting the following exception..
java.lang.IllegalStateException: Task already scheduled or cancelled
at java.util.Timer.sched(Timer.java:401)
at java.util.Timer.schedule(Timer.java:248)
at com.eviware.soapui.SoapUI.initGCTimer(SoapUI.java:1729)
at com.eviware.soapui.tools.AbstractSoapUIRunner.run(AbstractSoapUIRunner.java:144)


Any help is appreciated. Thank you!