Here is the unit test. Drools-LeftTupleIndexHashTable-61.zip
<http://drools.46999.n3.nabble.com/file/n4028135/Drools-LeftTupleIndexHashTable-61.zip>  


Mark Proctor wrote

Can you paste the 3 rules, that cause the issue? We’ll see if we can gleam
something from that, while we wait for your unit test.

Mark
On 16 Feb 2014, at 19:25, nxv &lt;

nxvanderlinden@

&gt; wrote:

Hello,

I keep trying to migrate drools from 5.5 to 6 on my project.  I found a
second regression/issue.  I'm trying to produce a unit test for
6.1.0-SNAPSHOT but I face some difficulties to determine the cause of
this
issue.  So I have a drl with 3 rules.  I'm a bit disappointed because if
I
switch two rules (without modifying anything, just switch one rule with
another in the drl file), the NPE disappears... 


Here is the stacktrace:

java.lang.NullPointerException
at
org.drools.core.util.index.LeftTupleIndexHashTable.remove(LeftTupleIndexHashTable.java:386)
at
org.drools.core.phreak.RuleNetworkEvaluator.doUpdatesReorderLeftMemory(RuleNetworkEvaluator.java:799)
at org.drools.core.phreak.PhreakJoinNode.doNode(PhreakJoinNode.java:38)
at
org.drools.core.phreak.RuleNetworkEvaluator.switchOnDoBetaNode(RuleNetworkEvaluator.java:547)
at
org.drools.core.phreak.RuleNetworkEvaluator.evalBetaNode(RuleNetworkEvaluator.java:533)
at
org.drools.core.phreak.RuleNetworkEvaluator.innerEval(RuleNetworkEvaluator.java:334)
at
org.drools.core.phreak.RuleNetworkEvaluator.outerEval(RuleNetworkEvaluator.java:161)
at
org.drools.core.phreak.RuleNetworkEvaluator.evaluateNetwork(RuleNetworkEvaluator.java:116)
at
org.drools.core.phreak.RuleExecutor.reEvaluateNetwork(RuleExecutor.java:201)
at
org.drools.core.phreak.RuleExecutor.evaluateNetworkAndFire(RuleExecutor.java:68)
at
org.drools.core.common.DefaultAgenda.fireNextItem(DefaultAgenda.java:935)
at
org.drools.core.common.DefaultAgenda.fireAllRules(DefaultAgenda.java:1200)
at
org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:952)
at
org.drools.core.common.AbstractWorkingMemory.fireAllRules(AbstractWorkingMemory.java:926)
at
org.drools.core.impl.StatefulKnowledgeSessionImpl.fireAllRules(StatefulKnowledgeSessionImpl.java:232)
at
org.drools.core.command.runtime.rule.FireAllRulesCommand.execute(FireAllRulesCommand.java:106)
at
org.drools.core.command.runtime.rule.FireAllRulesCommand.execute(FireAllRulesCommand.java:32)
at
org.drools.core.command.runtime.BatchExecutionCommandImpl.execute(BatchExecutionCommandImpl.java:155)
at
org.drools.core.command.runtime.BatchExecutionCommandImpl.execute(BatchExecutionCommandImpl.java:76)
at
org.drools.core.impl.StatelessKnowledgeSessionImpl.execute(StatelessKnowledgeSessionImpl.java:334)





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