[rules-users] NullPointerException with LeftTupleIndexHashTable.remove()

[Mark Proctor]

Also as a tip, turn on TRACE mode, for the logback.xml, and post back the results.

Mark

<?xml version="1.0" encoding="UTF-8"?>
<configuration>

  <appender name="consoleAppender" class="ch.qos.logback.core.ConsoleAppender">
    <encoder>
      <pattern>%d [%t] %-5p %m%n</pattern>
    </encoder>
  </appender>

  <logger name="org.drools" level=“TRACE"/>

  <root level="info">
    <appender-ref ref="consoleAppender" />
  </root>

</configuration>




On 16 Feb 2014, at 23:55, Mark Proctor <mproctor at codehaus.org> wrote:

> you have two drl files. One with two rules, one with one rule. Which is the rule you were adding and removing to see the bug?
> 
> Mark
> On 16 Feb 2014, at 22:50, nxv <nxvanderlinden at gmail.com> wrote:
> 
>> 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)
>>>> 
>>>> 
>>>> 
>>>> 
>>>> 
>>>> --
>>>> View this message in context:
>>>> http://drools.46999.n3.nabble.com/NullPointerException-with-LeftTupleIndexHashTable-remove-tp4028133.html
>>>> Sent from the Drools: User forum mailing list archive at Nabble.com.
>>>> _______________________________________________
>>>> rules-users mailing list
>>>> 
>> 
>>> rules-users at .jboss
>> 
>>>> https://lists.jboss.org/mailman/listinfo/rules-users
>>> 
>>> 
>>> _______________________________________________
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>> 
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>> 
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>> 
>> 
>> 
>> 
>> 
>> --
>> View this message in context: http://drools.46999.n3.nabble.com/NullPointerException-with-LeftTupleIndexHashTable-remove-tp4028133p4028135.html
>> Sent from the Drools: User forum mailing list archive at Nabble.com.
>> 
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>> https://lists.jboss.org/mailman/listinfo/rules-users
> 

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