While running testng test Parallel=methods on extent reports throws Null Pointer exception. PLEASE HELP

[TauckAutomation]

Its been 3 days i have did lot of reasearch on finding a solution to generate extent reports when running testng test parallel= methods but no luck yet on top of that i have very close deadline to demo my project to the client. I BADLY NEED SOMEONE HELP TO FIND A SOLUTION WHOEVER IS AVAILABLE I REALLY APPRECIATE.

Note : When i run the test parallel=classes it works fine but since i have requirement to run test only on parallel=methods i can't go with parallel=classes.

Here are list of classes i have in my project

================= BaseTest =================

public class BaseTest extends TestListenerAdapter { public ThreadLocal<ExtentTest> parentTest = new ThreadLocal<ExtentTest>(); public ThreadLocal<ExtentTest> test = new ThreadLocal<ExtentTest>();

@BeforeClass
public synchronized void beforeClass() throws Exception {
	ExtentTest parent = ExtentTestManager.createTest(getClass().getName());
	parentTest.set(parent);
	//throw new Exception("Failed ******* ");
}

@BeforeMethod
public synchronized void beforeMethod(Method method) {
	//String value = String.valueOf(parentTest.get().toString());
	ExtentTest child = parentTest.get().createNode(method.getName());
	test.set(child);

}

@AfterMethod
public synchronized void afterMethod(ITestResult result) {
	if (result.getStatus() == ITestResult.FAILURE)
		test.get().log(Status.FAIL,result.getThrowable());
	else if (result.getStatus() == ITestResult.SKIP)
		test.get().skip(result.getThrowable());
	else
		test.get().pass("Test passed");

	ExtentManager.getExtent().flush();
}

}

=========================================

================= ExtentManager =================

public class ExtentManager { public static Properties prop = new Properties();

public static ExtentReports extent;
public static String filePath = System.getProperty("user.dir") + "/target/ExtentReports.html";

public ExtentManager() throws IOException {
    prop.load(new FileInputStream("config.properties"));
}

public synchronized static ExtentReports getExtent() {
    if (extent == null) {
        extent = new ExtentReports();
        extent.attachReporter(getHtmlReporter());

/* if (System.getenv("ExtentX").equalsIgnoreCase("true")) { extent.attachReporter(getExtentXReporter()); }*/ extent.setSystemInfo("Selenium Java Version", "2.53.0"); extent.setSystemInfo("Environment", "Prod"); extent.setSystemInfo("AppiumVersion", "4.0.0");

    }

    return extent;
}

private static ExtentHtmlReporter getHtmlReporter() {
    ExtentHtmlReporter htmlReporter = new ExtentHtmlReporter(filePath);

    // make the charts visible on report open
    htmlReporter.config().setChartVisibilityOnOpen(true);

    // report title
    //String documentTitle = prop.getProperty("documentTitle", "aventstack - Extent");
    htmlReporter.config().setDocumentTitle("AppiumTestDistribution");
    htmlReporter.config().setReportName("ExtentReports");
    htmlReporter.config().setTestViewChartLocation(ChartLocation.TOP);
    htmlReporter.config().setTheme(Theme.STANDARD);
    return htmlReporter;
}

private static ExtentXReporter getExtentXReporter() {
    String host = prop.getProperty("MONGODB_SERVER");
    Integer port = Integer.parseInt(prop.getProperty("MONGODB_PORT"));
    ExtentXReporter extentx = new ExtentXReporter(host, port);

    // project name
    String projectName = prop.getProperty("projectName", "ExtentReports");
    extentx.config().setProjectName(projectName);

    // report or build name
    String reportName = prop.getProperty("reportName", "ExtentReports");
    extentx.config().setReportName(reportName);

    // server URL
    // ! must provide this to be able to upload snapshots

    return extentx;
}

}

=========================================

================= ExtentTestManager =================

public class ExtentTestManager { // new public static Properties prop = new Properties();

public static ThreadLocal<ExtentTest> extentTest = new ThreadLocal<ExtentTest>();
public static ExtentReports extent = ExtentManager.getExtent();

public synchronized static ExtentTest getTest() {
    return extentTest.get();
}

public synchronized static ExtentTest createTest(String name, String description,
    String deviceId) {
    ExtentTest test = extent.createTest(name, description);

    if (deviceId != null && !deviceId.isEmpty())
      //  test.assignCategory(deviceId);
        extentTest.set(test);
    return getTest();
}

public synchronized static ExtentTest createTest(String name, String description) {
    return createTest(name, description, String.valueOf(Thread.currentThread().getId()));
}

public synchronized static ExtentTest createTest(String name) {
    return createTest(name, "Sample Test");
}

}

=========================================

================= SampleTest =================

public class SampleTest extends BaseTest {

@Test
public void testApp(){
	System.out.println("ThreadName: " + Thread.currentThread().getName() + Thread.currentThread().getStackTrace()[1].getClassName());
	test.get().pass("This is test one");
}

@Test
public void testApp1(){
	System.out.println("ThreadName: " + Thread.currentThread().getName() + Thread.currentThread().getStackTrace()[1].getClassName());
	test.get().assignCategory("ONE");
}

@Test
public void testApp2(){
	System.out.println("ThreadName: " + Thread.currentThread().getName() + Thread.currentThread().getStackTrace()[1].getClassName());
	test.get().assignCategory("TWO");
	AssertJUnit.assertTrue(false);
}

}

=========================================

================= testng.xml =================

	<classes>
		<class name="com.test.sample.SampleTest" />
	</classes>
</test> <!-- Test -->

=========================================

================ Exception =====================

=========================================

Thanks Vinit

[VinitSandesara]

@anshooarora , Can you please help, this is holding my project deadline.

Thanks Vinit