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I am trying to create Extent Report in cucumber project with EventPublisher class. Basically took help from How to implement Extent report in Cucumber using EventListener and Where to find documentation for this class

But when I am running the project, I am getting below exception

java.lang.NullPointerException
    at com.npc.qa.listeners.customReportListener.stepFinished(customReportListener.java:130)
    at io.cucumber.core.eventbus.AbstractEventPublisher.send(AbstractEventPublisher.java:51)
    at io.cucumber.core.eventbus.AbstractEventPublisher.sendAll(AbstractEventPublisher.java:36)
    at io.cucumber.core.plugin.CanonicalOrderEventPublisher.handle(CanonicalOrderEventPublisher.java:18)
    at io.cucumber.core.eventbus.AbstractEventPublisher.send(AbstractEventPublisher.java:44)
    at io.cucumber.core.eventbus.AbstractEventBus.send(AbstractEventBus.java:12)
    at io.cucumber.core.runtime.CucumberExecutionContext.emitTestRunFinished(CucumberExecutionContext.java:107)
    at io.cucumber.core.runtime.CucumberExecutionContext.finishTestRun(CucumberExecutionContext.java:88)
    at io.cucumber.testng.TestNGCucumberRunner.finish(TestNGCucumberRunner.java:125)
    at io.cucumber.testng.AbstractTestNGCucumberTests.tearDownClass(AbstractTestNGCucumberTests.java:53)
    at java.util.ArrayList.forEach(ArrayList.java:1257)
... Removed 29 stack frames
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  • Please add the code where you get that exception
    – PDHide
    Mar 1 at 5:11
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If you check the error , the exception is thrown at com.npc.qa.listeners.customReportListener.stepFinished(customReportListener.java:130)

So check the customreporter class line 130 , the issue is caused when you try to access driver object in listner class after it is destroyed.

Unlike , testNG listner class cucumber uses an event class so it just gets the event and process In the order of Queue . It doesn't stop the code execution and so you won't be able to access the driver object inside that,as the state of driver keeps on changing as the code is still executing

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