jbpm4.4，startProcessInstanceById流程报错。

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jbpm4.4，startProcessInstanceById流程报错。5

新手新学jbpm4.4.用的mysql5.5.18数据库。deploy可以发布，startProcessInstanceById不行。
求解！！！

HASVARS_这个字段是bit型。打出的SQL语句看不到是什么值。

错误信息：

Hibernate: 
    insert 
    into
        JBPM4_EXECUTION
        (DBVERSION_, ACTIVITYNAME_, PROCDEFID_, HASVARS_, NAME_, KEY_, ID_, STATE_, SUSPHISTSTATE_, PRIORITY_, HISACTINST_, PARENT_, INSTANCE_, SUPEREXEC_, SUBPROCINST_, CLASS_, DBID_) 
    values
        (?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, ?, 'pvm', ?)
org.hibernate.util.JDBCExceptionReporter - Data too long for column 'HASVARS_' at row 1
org.hibernate.event.def.AbstractFlushingEventListener - Could not synchronize database state with session
org.hibernate.exception.DataException: Could not execute JDBC batch update
	at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java:77)
	at org.hibernate.exception.JDBCExceptionHelper.convert(JDBCExceptionHelper.java:43)
	at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:253)
	at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:92)
	at org.hibernate.jdbc.AbstractBatcher.prepareStatement(AbstractBatcher.java:87)
	at org.hibernate.jdbc.AbstractBatcher.prepareBatchStatement(AbstractBatcher.java:222)
	at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2224)
	at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2660)
	at org.hibernate.action.EntityInsertAction.execute(EntityInsertAction.java:56)
	at org.hibernate.engine.ActionQueue.execute(ActionQueue.java:250)
	at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:234)
	at org.hibernate.engine.ActionQueue.executeActions(ActionQueue.java:141)
	at org.hibernate.event.def.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:298)
	at org.hibernate.event.def.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:27)
	at org.hibernate.impl.SessionImpl.flush(SessionImpl.java:1000)
	at org.jbpm.pvm.internal.tx.HibernateSessionResource.prepare(HibernateSessionResource.java:56)
	at org.jbpm.pvm.internal.tx.StandardTransaction.commit(StandardTransaction.java:107)
	at org.jbpm.pvm.internal.tx.StandardTransaction.complete(StandardTransaction.java:64)
	at org.jbpm.pvm.internal.tx.StandardTransactionInterceptor.execute(StandardTransactionInterceptor.java:57)
	at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.executeInNewEnvironment(EnvironmentInterceptor.java:53)
	at org.jbpm.pvm.internal.svc.EnvironmentInterceptor.execute(EnvironmentInterceptor.java:40)
	at org.jbpm.pvm.internal.svc.RetryInterceptor.execute(RetryInterceptor.java:56)
	at org.jbpm.pvm.internal.svc.SkipInterceptor.execute(SkipInterceptor.java:43)
	at org.jbpm.pvm.internal.svc.ExecutionServiceImpl.startProcessInstanceById(ExecutionServiceImpl.java:51)
	at com.dhcc.trans.action.TransAction.execute(TransAction.java:45)
	at org.springframework.web.struts.DelegatingActionProxy.execute(DelegatingActionProxy.java:110)
	at org.apache.struts.action.RequestProcessor.processActionPerform(RequestProcessor.java:419)
	at org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:224)
	at org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
	at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:286)
	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:845)
	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)
	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:447)
	at java.lang.Thread.run(Thread.java:662)
Caused by: java.sql.BatchUpdateException: Data too long for column 'HASVARS_' at row 1
	at com.mysql.jdbc.PreparedStatement.executeBatch(PreparedStatement.java:1540)
	at org.hibernate.jdbc.BatchingBatcher.doExecuteBatch(BatchingBatcher.java:48)
	at org.hibernate.jdbc.AbstractBatcher.executeBatch(AbstractBatcher.java:246)

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