code: public void unregisterNamespace(String prefix) throws NamespaceException, RepositoryException
     {
  
        unregisterNamespace(prefix, true);
  
        if (started && rpcService != null)
        {
           try
           {
              rpcService.executeCommandOnAllNodes(unregisterNamespace, false, id, prefix);
           }
           catch (Exception e)
           {
              LOG.warn("Could not unregister the prefix '" + prefix + "' on other cluster nodes", e);
           }
        }
     }
docs: {@inheritDoc}