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Bug 1195142

Summary: Modal with SessionNotFoundException after completing Human Task whose completion completes process
Product: [Retired] JBoss BPMS Platform 6 Reporter: Jan Hrcek <jhrcek>
Component: Business CentralAssignee: Marco Rietveld <mrietvel>
Status: CLOSED EOL QA Contact: Lukáš Petrovický <lpetrovi>
Severity: medium Docs Contact:
Priority: high    
Version: 6.1.0CC: ajuricic, ibek, kverlaen, rzhang
Target Milestone: ER6   
Target Release: 6.1.0   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2020-03-27 20:08:40 UTC Type: Bug
Regression: --- Mount Type: ---
Documentation: --- CRM:
Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
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Description Flags
Task details empty none

Description Jan Hrcek 2015-02-23 08:39:38 UTC 
Description of problem:
I have a simple "start -> HumanTask -> end" process.

When I complete that task in the task list a modal appears with the following error:
"Unexpected error encountered: org.kie.internal.runtime.manager.SessionNotFoundException: No session found for context 8"

The modal does appear only in cases when Details panel remains opened after completing task. When the details panel is automatically closed (not sure what triggers that), the error modal still appears after I reopen Details Panel (select All filter in tasks table and then click the completed task).

The error seems to appear only when PER_REQUEST and PER_PROCESS_INSTANCE runtime strategies are used. For SINGLETON strategy it seems to work OK.

There is no exception in server.log

Version-Release number of selected component (if applicable):
BPM Suite 6.1.0 ER5 deployed on EAP

How reproducible:
Always

Steps to Reproduce:
1. Start instance of simple process with just 1 Human task
2. Complete the task in task list

Actual results:
Modal with error appears. In case it doesn't appear immediately, select All filter in tasks table and click the row for completed task -> Details Panel opens and with it the error modal appear.

Expected results:
No error modals when completing tasks / seeing task details.

Additional info:
Comment 1 Jan Hrcek 2015-02-23 09:01:00 UTC 
There is another symptom of this issue : Task Detail panel contains no data for such a tasks (see screenshot)
Comment 2 Jan Hrcek 2015-02-23 09:02:29 UTC 
Created attachment 994318 [details]
Task details empty
Comment 3 Maciej Swiderski 2015-02-23 17:40:46 UTC 
it was indeed affecting only per request and per process instance because when request or process instance is completed ksession id destroyed and by that access to runtime engine was causing this exception even though ksession was not accessed.
This was improved to delay the session id check until actually ksession is taken from runtime engine instead of when runtime engine is taken from manager.

jbpm
master:
https://github.com/droolsjbpm/jbpm/commit/ae9304204c72085d860b5a600fbd65dbf1ee507b

6.2.x:
https://github.com/droolsjbpm/jbpm/commit/765ad2a57460ac72ca4416be389c1654eb328b29
Comment 5 Jan Hrcek 2015-03-11 12:55:30 UTC 
No more modal with error on process completion as described in Description. The behavior mentioned in comment 1 and 2 is expected and will not be fixed, because tasks are deleted from the DB after process is completed.

Verified with BPM Suite 6.1.0 ER6