TestNG parallelism issue

Output

tetsngparallel.ParallelTestClass@47d384ee: method1 running on thread 12, pool-1-thread-1
tetsngparallel.ParallelTestClass@47d384ee: method2 running on thread 12, pool-1-thread-1
tetsngparallel.ParallelTestClass@47d384ee: method3 running on thread 12, pool-1-thread-1
tetsngparallel.ParallelTestClass@3930015a: method1 running on thread 13, pool-1-thread-2
tetsngparallel.ParallelTestClass@3930015a: method2 running on thread 13, pool-1-thread-2
tetsngparallel.ParallelTestClass@3930015a: method3 running on thread 13, pool-1-thread-2
tetsngparallel.ParallelTestClass@629f0666: method1 running on thread 14, pool-1-thread-3
tetsngparallel.ParallelTestClass@629f0666: method2 running on thread 14, pool-1-thread-3
tetsngparallel.ParallelTestClass@629f0666: method3 running on thread 14, pool-1-thread-3
tetsngparallel.ParallelTestClass@2d6a9952: method1 running on thread 15, pool-1-thread-4
tetsngparallel.ParallelTestClass@2d6a9952: method2 running on thread 15, pool-1-thread-4
tetsngparallel.ParallelTestClass@2d6a9952: method3 running on thread 15, pool-1-thread-4
tetsngparallel.ParallelTestClass@1bc6a36e: method1 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@1bc6a36e: method2 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@1bc6a36e: method3 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@387c703b: method1 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@387c703b: method2 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@387c703b: method3 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@31b7dea0: method1 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@31b7dea0: method2 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@31b7dea0: method3 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@22a71081: method1 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@22a71081: method2 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@22a71081: method3 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@3ac42916: method1 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@3ac42916: method2 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@3ac42916: method3 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@1ff8b8f: method1 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@1ff8b8f: method2 running on thread 16, pool-1-thread-5
tetsngparallel.ParallelTestClass@1ff8b8f: method3 running on thread 16, pool-1-thread-5
...

ParallelTestClass.java

package tetsngparallel;

import org.testng.annotations.Test;

public class ParallelTestClass {

	
	
	@Test
	public void method1() {
		printThreadInfo();
		sleep();
	}

	//@Test(dependsOnMethods = "method1")
	@Test
	public void method2() {
		printThreadInfo();
		sleep();
	}

	//@Test(dependsOnMethods = "method2")
	@Test
	public void method3() {
		printThreadInfo();
		sleep();
	}
	
	private void sleep() {
		try {
			Thread.sleep(3000);
		} catch (InterruptedException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}

	private void printThreadInfo() {
		final Throwable t = new Throwable();
		final StackTraceElement methodCaller = t.getStackTrace()[1];
		System.out.println(toString() + ": " + methodCaller.getMethodName() + " running on thread "
				+ Thread.currentThread().getId() + ", "
				+ Thread.currentThread().getName());
	}
}

ParellelTestFactory.java

package tetsngparallel;

import org.testng.annotations.Factory;

public class ParellelTestFactory {

	@Factory
	  public Object[] createInstances() {
	   Object[] result = new Object[10]; 
	   for (int i = 0; i < 10; i++) {
	      result[i] = new ParallelTestClass();
	    }
	    return result;
	  }

}

tetsng.xml

<?xml version="1.0" encoding="UTF-8"?>
<suite name="Tests" parallel="instances" group-by-instances="true">
	<test name="ParallelTestClass" group-by-instances="true">
		<classes>
			<class name="tetsngparallel.ParellelTestFactory" />
		</classes>
	</test> <!-- Test -->
	
</suite> <!-- Suite -->