[jboss-jira] [JBoss JIRA] (DROOLS-2172) Segment split can cause the resulting segments to be associated to the wrong path

[Mario Fusco (JIRA)]

    [ https://issues.jboss.org/browse/DROOLS-2172?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13503884#comment-13503884 ] 

Mario Fusco commented on DROOLS-2172:
-------------------------------------

If a segment split happens during an incremental compilation all the paths associated to the old segment are also associated to the new one regardless if the new segment actually belongs to that path or not. This may lead to spurious path linking and then to a NPE when the whole path is evaluated like the following

{code}
java.lang.NullPointerException
	at org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:114)
	at org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:212)
	at org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:87)
	at org.drools.core.concurrent.AbstractRuleEvaluator.internalEvaluateAndFire(AbstractRuleEvaluator.java:34)
	at org.drools.core.concurrent.SequentialRuleEvaluator.evaluateAndFire(SequentialRuleEvaluator.java:43)
	at org.drools.core.common.DefaultAgenda.fireLoop(DefaultAgenda.java:1067)
	at org.drools.core.common.DefaultAgenda.internalFireAllRules(DefaultAgenda.java:1014)
	at org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1006)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.internalFireAllRules(StatefulKnowledgeSessionImpl.java:1320)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1311)
	at org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:1295)
{code}

> Segment split can cause the resulting segments to be associated to the wrong path
> ---------------------------------------------------------------------------------
>
>                 Key: DROOLS-2172
>                 URL: https://issues.jboss.org/browse/DROOLS-2172
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>            Reporter: Mario Fusco
>            Assignee: Mario Fusco
>




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