@Override
        public void onDisconnect(final InternalDistributedSystem sys) {
          final boolean isDebugEnabled_DLS = logger.isTraceEnabled(LogMarker.DLS_VERBOSE);
          if (isDebugEnabled_DLS) {
            logger.trace(LogMarker.DLS_VERBOSE, "Shutting down Distributed Lock Services");
          }
          long start = System.currentTimeMillis();
          try {
            destroyAll();
          } finally {
            closeStats();
            long delta = System.currentTimeMillis() - start;
            if (isDebugEnabled_DLS) {
              logger.trace(LogMarker.DLS_VERBOSE, "Distributed Lock Services stopped (took {} ms)",
                  delta);
            }
          }
        }
Destroys all named locking services on disconnect from system
geode-core/src/main/java/org/apache/geode/distributed/internal/locks/DLockService.java