[rules-users] Drools Planner 5.5.0.Final Memory corruption issues

[duggal]

I am using Drools Planner for an optimization problem and facing weird memory
corruption issues.
The problem facts and planning entities are JPA entities which have lots of
relationships and are large in size.

When I use a few of the entities, then the solving works ok.
However when I use large number of these entities, then I get strange
exceptions indicating memory corruption in the result. E.g. the serialized
best solution (serialized by me for persistence purposes) appears to be have
invalid class types in members.

I see that there are the following exceptions in the log (for both small and
large data sets) -
 Exception in thread "Thread-106" java.lang.RuntimeException: Unknown
accessor type:
org.mvel2.optimizers.impl.refl.collection.ArrayCreator at e7d1626d
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.ConditionAnalyzer.analyzeAccessor(ConditionAnalyzer.java:264)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.ConditionAnalyzer.analyzeNode(ConditionAnalyzer.java:250)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.ConditionAnalyzer.statementToExpression(ConditionAnalyzer.java:467)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.ConditionAnalyzer.readInvocationParams(ConditionAnalyzer.java:457)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.ConditionAnalyzer.analyzeAccessor(ConditionAnalyzer.java:345)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.ConditionAnalyzer.analyzeExpressionNode(ConditionAnalyzer.java:326)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.ConditionAnalyzer.analyzeAccessor(ConditionAnalyzer.java:286)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.ConditionAnalyzer.analyzeNode(ConditionAnalyzer.java:250)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.ConditionAnalyzer.analyzeSingleCondition(ConditionAnalyzer.java:133)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.ConditionAnalyzer.analyzeCondition(ConditionAnalyzer.java:99)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.ConditionAnalyzer.analyzeCondition(ConditionAnalyzer.java:70)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.MvelConditionEvaluator.getAnalyzedCondition(MvelConditionEvaluator.java:83)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.MvelConstraint.executeJitting(MvelConstraint.java:270)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.MvelConstraint.access$200(MvelConstraint.java:51)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
org.drools.rule.constraint.MvelConstraint$ConditionJitter.run(MvelConstraint.java:250)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:897)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:919)
[2/12/13 12:35:34:309 IST] 00000174 SystemErr     R   	at
java.lang.Thread.run(Thread.java:770)

Are these exceptions (which appear benign in the small data set solution)
causing my issue?
Are there any further troubleshooting that I can perform to isolate the root
cause?

Any help will be much appreciated. Thanks



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