JBPM流程无法正常启动。。。完成任务的时候锁表。。

Question

ProcessInstance pi = processEngine.getExecutionService().startProcessInstanceByKey(key,pid);

有时候执行不成功，数据库中jbpm4_execution中无记录，但是代码确能返回非空的ProcessInstance 对象；

processEngine.getTaskService().completeTask有时候锁表，流程无法执行下去，执行查看锁的脚本：select b.owner,b.object_name,l.session_id,l.locked_mode
         from v$locked_object l, dba_objects b
         where b.object_id=l.object_id

结果以下表被锁定：

JBPM4_EXECUTION
JBPM4_HIST_ACTINST
JBPM4_HIST_DETAIL
JBPM4_HIST_PROCINST
JBPM4_HIST_TASK
JBPM4_HIST_VAR
JBPM4_PARTICIPATION
JBPM4_SWIMLANE
JBPM4_TASK
JBPM4_VARIABLE

求原因，求解

Answer 1

执行不成功锁表只能说明楼主的事务有问题。