MockAM am2 = rm.sendAMLaunched(attempt2.getAppAttemptId());
am2.registerAppAttempt();
// Now trying to release container allocated for app1 -> appAttempt1.
ContainerId cId = alloc1Response.getAllocatedContainers().get(0).getId();
am2.addContainerToBeReleased(cId);
try {
am2.schedule();
Assert.fail("Exception was expected!!");
} catch (InvalidContainerReleaseException e) {
StringBuilder sb = new StringBuilder("Cannot release container : ");