topic Re: Async service tasks fails to update status in Alfresco Archive

Async service tasks fails to update status

paulfrancis — Thu, 24 Apr 2014 22:40:39 GMT

I executed an activiti model, made up of 13 asynchronous non exclusive java service tasks, all in parallel to one another, and all linked to a single start and end event. When the workflow starts, all the 13 service tasks gets instantiated, and the task execution completes successfully for all 13 on

Re: Async service tasks fails to update status

martin_grofcik — Fri, 25 Apr 2014 05:27:21 GMT

What was the reason for retry?
(Any stack trace?)

Regards
Martin

Re: Async service tasks fails to update status

paulfrancis — Fri, 25 Apr 2014 23:28:59 GMT

This the message in catalina.out

Exception in thread "pool-2-thread-4" org.activiti.engine.ActivitiOptimisticLockingException: ProcessInstance[1627] was updated by another transaction concurrently
at org.activiti.engine.impl.db.DbSqlSession.flushUpdates(DbSqlSession.java:562)
at org.activiti.engine.impl.db.DbSqlSession.flush(DbSqlSession.java:444)
at org.activiti.engine.impl.interceptor.CommandContext.flushSessions(CommandContext.java:170)
at org.activiti.engine.impl.interceptor.CommandContext.close(CommandContext.java:117)
at org.activiti.engine.impl.interceptor.CommandContextInterceptor.execute(CommandContextInterceptor.java:66)
at org.activiti.spring.SpringTransactionInterceptor$1.doInTransaction(SpringTransactionInterceptor.java:47)
at org.springframework.transaction.support.TransactionTemplate.execute(TransactionTemplate.java:130)
at org.activiti.spring.SpringTransactionInterceptor.execute(SpringTransactionInterceptor.java:45)
at org.activiti.engine.impl.interceptor.LogInterceptor.execute(LogInterceptor.java:31)
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:40)
at org.activiti.engine.impl.cfg.CommandExecutorImpl.execute(CommandExecutorImpl.java:35)
at org.activiti.engine.impl.jobexecutor.ExecuteJobsRunnable.run(ExecuteJobsRunnable.java:46)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:744)

Re: Async service tasks fails to update status

martin_grofcik — Mon, 28 Apr 2014 06:53:46 GMT

Hi Paul,

It seems that process instance is updated concurrently from different threads. How to avoid it: you can try to set org.activiti.engine.impl.interceptor.CommandConfig#contextReusePossible to false. I am not sure - I did not test it but may be it could help.
If not prepare jUnit test for it.

Regards
Martin