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1. Re: JBPM 6 clustering
swiderski.maciej Jun 20, 2014 2:01 AM (in response to shijuj)In my opinion it does not make sense to share RuntimeManager instance across JVMs. Any reason why you want to do that?
Best performance is achieved when each cluster member has its own "copy" of runtime manager so they operate in isolation.
HTH
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2. Re: JBPM 6 clustering
shijuj Jun 23, 2014 5:10 AM (in response to swiderski.maciej)1 of 1 people found this helpfulHi Mac,
Thanks for the reply. I need to deploy the JBPM 6 in a clustered environment (Node 1 & Node 2). I have a few doubts .Could you please help me to solve this?
I have Process with following definition (Using the PerProcessInstance Context)
scenario 1 : start -> Human Task 1 -> Automatic task 1 -> stop
Started the process in node 1, After that the node 1 is getting down . Then the complete task request go to node 2. How will it resolve the Run-time manger & Knowledge session for continuing the process execution ?
scenario 2 : start -> Automatic task 1 -> Automatic task 2 -> stop
Started the process definition in node 1 after completing the Automatic task 1 the node is getting down . How we continue this execution from node 2.
Could you please help on these two ?
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3. Re: JBPM 6 clustering
swiderski.maciej Jun 23, 2014 8:11 AM (in response to shijuj)1 of 1 people found this helpfulShiju John wrote:
Hi Mac,
Thanks for the reply. I need to deploy the JBPM 6 in a clustered environment (Node 1 & Node 2). I have a few doubts .Could you please help me to solve this?
I have Process with following definition (Using the PerProcessInstance Context)
scenario 1 : start -> Human Task 1 -> Automatic task 1 -> stop
Started the process in node 1, After that the node 1 is getting down . Then the complete task request go to node 2. How will it resolve the Run-time manger & Knowledge session for continuing the process execution ?
as long as both nodes in the cluster have same kjars (deployment units) deployed then runtime manager already exists there. Whenever task is completed listener is responsible for finding out correct runtime manager and moving on with the process instance. So important to keep all cluster nodes in sync in terms of what is deployed there. kie-wb (jbpm console) by default does that by syncing git repositories. Alternatively you can simply deploy same kjars to all cluster members.
Shiju John wrote:
scenario 2 : start -> Automatic task 1 -> Automatic task 2 -> stop
Started the process definition in node 1 after completing the Automatic task 1 the node is getting down . How we continue this execution from node 2.
if it's automatic processing without wait state then when server goes down when processing did not finish then transaction is rolled back and the process instance is not persisted though as it was never started. In such cases best is to use async processing using jbpm executor that ensures that job will be picked up next time executor checks for available jobs.
HTH
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4. Re: JBPM 6 clustering
shijuj Jun 23, 2014 9:58 AM (in response to swiderski.maciej)Hi mac.
Thanks very much Mac.
In the first scenario what I understood is if the process definition are available in the Knowledge base then the listeners are internally identify the KSession and continue the execution flow. (In some scenario ( PerProcessInstance context , Run-time engine is not available ) found that the new Knowledge session is generated).
Shiju John wrote:
scenario 2 : start -> Automatic task 1 -> Automatic task 2 -> stop
Started the process definition in node 1 after completing the Automatic task 1 the node is getting down . How we continue this execution from node 2.
if it's automatic processing without wait state then when server goes down when processing did not finish then transaction is rolled back and the process instance is not persisted though as it was never started. In such cases best is to use async processing using jbpm executor that ensures that job will be picked up next time executor checks for available jobs.
Could you please share some examples of JBPM executor implementation .
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5. Re: JBPM 6 clustering
swiderski.maciej Jun 24, 2014 1:38 AM (in response to shijuj)examples are included in jbpm-playground repository for the demo installation under async-examples. Some details about jbpm executor can be found in docs and in this article.
HTH