Jack Q tao [http://community.jboss.org/people/qintao1203] created the discussion "Re: How to setVariable after JPAKnowledgeService.loadStatefulKnowledgeSession" To view the discussion, visit: http://community.jboss.org/message/637411#637411 -------------------------------------------------------------- solve it. I set a *uuid* for every flow ! and cached signers  by uuid .   *cache.put(uuid ,List<String> signers)*; and cache.get(uuid) by script task. *if(null == p || p.size()==0){* *                     isSign = false;* *                     signers = null;* *                     kcontext.setVariable("isSign",false);* *                    kcontext.setVariable("signers",null);* *           }else{* *                               isSign = true;* *                               signers = p;* *                               kcontext.setVariable("isSign",true);* *                              kcontext.setVariable("signers",p);* *                              JbpmCache.remove(uuid);* *           }* B-) -------------------------------------------------------------- Reply to this message by going to Community [http://community.jboss.org/message/637411#637411] Start a new discussion in jBPM at Community [http://community.jboss.org/choose-container!input.jspa?contentType=1&...]