private void incActiveLocks() {
    synchronized (destroyLock) {
      checkDestroyed();
      activeLocks++;
    }
  }
Increments {@link #activeLocks} while synchronized on {@link #destroyLock} after calling
{@link #checkDestroyed()}.
geode-core/src/main/java/org/apache/geode/distributed/internal/locks/DLockService.java