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Bug 1325824

Summary:	OptaPlanner Kie server: Concurrency issue when returning best solution
Product:	[Retired] JBoss BRMS Platform 6	Reporter:	Karel Suta <ksuta>
Component:	Kie-Server	Assignee:	Geoffrey De Smet <gdesmet>
Status:	CLOSED EOL	QA Contact:	Karel Suta <ksuta>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	6.3.0
Target Milestone:	---
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2020-03-27 19:03:21 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:

Description Karel Suta 2016-04-11 10:18:25 UTC

Description of problem:
Retrieving of best solution from Kie server right after starting solver may return best solution with initialized score, but without planning variables assigned to planning entities.
For more info see [1].


Version-Release number of selected component (if applicable):
6.3.0.ER2

How reproducible:
Can be simulated using OptaPlanner integration test [2], test method testGetBestSolution(). This error happens just rarely, best reproducing approach was so far to run mentioned test several times in loop (10-30 times).


Steps to Reproduce:
1.
2.
3.

Actual results:
Best solution is returned with initialized score but without planning variables assigned to planning entities.

Expected results:
If planning variables aren't assigned to planning entities yet then score should be null.

Additional info:

[1] https://issues.jboss.org/browse/PLANNER-564
[2] https://github.com/droolsjbpm/droolsjbpm-integration/blob/master/kie-server-parent/kie-server-tests/kie-server-integ-tests-optaplanner/src/test/java/org/kie/server/integrationtests/optaplanner/OptaplannerIntegrationTest.java