code: protected  void removeDialogFromDistributedCache(String dialogId) {
  		if(getStackLogger().isLoggingEnabled(StackLogger.TRACE_DEBUG)) {
  			getStackLogger().logDebug("sipStack " + this + " removing the dialog " + dialogId + " from the distributed cache");
  		}
  		// remove the corresponding dialog from the cache instance
  		// put the corresponding dialog into the cache instance
  		try {
  			sipCache.removeDialog(dialogId);
  		} catch (SipCacheException e) {
  			getStackLogger().logError("sipStack " + this + " problem removing dialog " + dialogId + " from the distributed cache", e);
  		}
  	}
docs: Remove the dialog from the distributed cache
  @param dialogId the id of the dialog to remove