topic Exception in flow when using UserTasks in b/w ServiceTasks in Alfresco Archive

Exception in flow when using UserTasks in b/w ServiceTasks

basu — Mon, 11 Apr 2011 22:58:39 GMT

Hi,I created an activiti process with around 40 service tasks and in between I placed some user tasks as shown below.Start —>UserTask1 —> SerTask1 –> SerTask2—-> SerTask3 –>SerTask4 —>UserTask2 –> SerTask5 –> SerTask6 –> SerTask7 –> SerTask8—>SerTask9

Re: Exception in flow when using UserTasks in b/w ServiceTasks

jbarrez — Tue, 12 Apr 2011 08:00:23 GMT

Without the actual service task code, it's impossible to say what's wrong.

But 40 serviceTasks and more? That doesnt sound like a well-designed process to me …

Re: Exception in flow when using UserTasks in b/w ServiceTasks

basu — Wed, 13 Apr 2011 19:23:26 GMT

Hi,
Thanks you so much for responding to my query. I saw an issue with the activiti-rest api for this issue. When I click on each user task and check the database table act_hi_taskinst in back end its updating for each and every task. But when I check database table from activiti-probe UI there is a mismatch in the row count(This mismatch is intermittent). Some times its taking one or two hours to sync up even after several page refreshes. Even if I check with activiti-rest api to check the assigned tasks(which were not completed) there is a mismatch and its showing same as the activiti probe database UI is.

Attaching the screen shots for your reference. From the screen shots shown below original database is showing BreakPoint13 is completed but rest API and activiti-probe UI database are showing its not completed. I have to wait untill this table is updated on activit-probe UI and click the next task else if I click with out updating its throwing the below shown exception.

Please suggest me whether any issue in this process.

Thanks,
Sudheer,

Re: Exception in flow when using UserTasks in b/w ServiceTasks

frederikherema1 — Thu, 14 Apr 2011 08:16:04 GMT

What type of database are you using? Since you can see the changes in your DB-tool( commandline) I presume the transaction is commited. Since activiti does no caching in the engine of tasks, a request to the REST-api should load directly from database…

Re: Exception in flow when using UserTasks in b/w ServiceTasks

basu — Thu, 14 Apr 2011 17:56:13 GMT

Thank you for your response.
I am using MYSQL database. As I am seeing data in the database means transaction was committed. When I have this mismatch issue, If I restart the server then all three (Database,Activiti-probe UI DB, REST-API Call) were in sync. It seems to be some problem with the caching. Please suggest me what could be the issue ?

Thanks,
Basu.

Re: Exception in flow when using UserTasks in b/w ServiceTasks

basu — Thu, 14 Apr 2011 19:37:56 GMT

FYI I am using JBOSS AS…

Re: Exception in flow when using UserTasks in b/w ServiceTasks

frederikherema1 — Tue, 19 Apr 2011 09:20:42 GMT

That's very strange. In activiti, no caches are used. Maybe browser-caching? Tried doing a hard refresh? (Crtl + R or Crtl +F5)