Hi Mariusz,

I didn't add the loop controller initially, I just tried adding the loop
controller and resolved the issue.
Thank you very much for your answer.

On Tue, Nov 3, 2020 at 4:01 PM Mariusz W <[email protected]> wrote:

> Hi,
> Did you try to call setSamplerController(LoopController c)  on
> ultimateThreadGroup when building a plan?
> Some examples regarding run jmeter from api are here
>
> https://www.blazemeter.com/blog/5-ways-launch-jmeter-test-without-using-jmeter-gui
>
> Regards,
> Mariusz
>
> On Tue, 3 Nov 2020 at 08:57, Asanka Godamuna <[email protected]> wrote:
>
> > Hi All,
> >
> > I am trying to use UltimateThreadGroup with the JMeter Java API, I am
> > creating the UltimateThreadGroup object as in the below code[2] and add
> it
> > to the Hashtree.
> >
> > Finally handover it to the JMeter engine to execute.
> >
> > But It gives the following NullPointerException in the middle of
> exception.
> > As I debugged the code, the Issue seems occure inside JMeterThread class
> > following method.
> >
> > public JMeterThread(HashTree test, JMeterThreadMonitor monitor,
> > ListenerNotifier note, Boolean isSameUserOnNextIteration)
> >
> >
> > But issue throws on different lines from execution to execution.
> >
> > Does anybody have an idea on whats going on here? Appreciate your
> answers.
> >
> > [1]
> > 2020-11-03 13:08:20 DEBUG TestCompiler:273 - adding controller:
> > kg.apc.jmeter.threads.UltimateThreadGroup@30b2b76f to sampler config
> > 2020-11-03 13:08:22 ERROR JMeterThread:319 - Test failed!
> > java.lang.NullPointerException
> > at
> >
> >
> org.apache.jmeter.threads.AbstractThreadGroup.addTestElement(AbstractThreadGroup.java:122)
> > at
> >
> >
> org.apache.jmeter.threads.AbstractThreadGroup.addTestElementOnce(AbstractThreadGroup.java:131)
> > at
> >
> org.apache.jmeter.threads.TestCompiler.subtractNode(TestCompiler.java:151)
> > at
> org.apache.jorphan.collections.HashTree.traverseInto(HashTree.java:997)
> > at
> org.apache.jorphan.collections.HashTree.traverseInto(HashTree.java:994)
> > at org.apache.jorphan.collections.HashTree.traverse(HashTree.java:976)
> > at org.apache.jmeter.threads.JMeterThread.initRun(JMeterThread.java:704)
> > at org.apache.jmeter.threads.JMeterThread.run(JMeterThread.java:252)
> > at java.lang.Thread.run(Thread.java:748)
> >
> > [2]
> >
> > UltimateThreadGroup ultimateThreadGroup = new UltimateThreadGroup();
> > ultimateThreadGroup.setName(threadGroupName);
> > ultimateThreadGroup.setProperty(AbstractThreadGroup.ON_SAMPLE_ERROR,
> > AbstractThreadGroup.ON_SAMPLE_ERROR_CONTINUE);
> > PowerTableModel dataModel = new
> > PowerTableModel(UltimateThreadGroupGui.columnIdentifiers,
> > UltimateThreadGroupGui.columnClasses);
> > dataModel.addRow(new Integer[]{2, 4, 10, 60, 10});
> > dataModel.addRow(new Integer[]{3, 4, 10, 120, 10});
> > CollectionProperty prop =
> > JMeterPluginsUtils.tableModelRowsToCollectionProperty(dataModel,
> > UltimateThreadGroup.DATA_PROPERTY);
> > ultimateThreadGroup.setData(prop);
> > ultimateThreadGroup.setEnabled(setEnabled);
> > ultimateThreadGroup.setProperty(TestElement.TEST_CLASS,
> > UltimateThreadGroup.class.getName());
> > ultimateThreadGroup.setProperty(TestElement.GUI_CLASS,
> > UltimateThreadGroupGui.class.getName());
> >
>

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