code: @Override
      public void enlistRRS() {
          stateMgr.setStateNoValidate(WSStateManager.RRS_GLOBAL_TRANSACTION_ACTIVE); 
          if (TraceComponent.isAnyTracingEnabled() && tc.isDebugEnabled())
              Tr.debug(this, tc, "Setting transaction state to RRS_GLOBAL_TRANSACTION_ACTIVE"); 
      }
docs: Invoked when enlisting in a z/OS RRS (Resource Recovery Services) global transaction.