private static void createLockGrantor(String serviceName) {
    connectDistributedSystem();
    final DistributedLockService service =
        DistributedLockService.create(serviceName, dlstSystem);

    // lock and unlock to make sure this vm is grantor
    // implementation detail: as long as this VM gets the first lock, it will be the grantor
    assertThat(service.lock("obj", -1, -1)).isTrue();
    service.unlock("obj");
  }
Client requests lock and then interrupts lock request before processing the grant reply. This
causes the Client to send a release msg to the grantor.
geode-core/src/distributedTest/java/org/apache/geode/distributed/DistributedLockServiceDUnitTest.java