[rules-users] Drools 5.5 run time exception from the library code but no impact to the rule evaluation result

[Sean Su]

Just want to put the exception out here in case it is meaningful to the
development or whoever ran into this before. It occurred but does not
impact the result of the process.

Exception in thread "Thread-6" java.lang.NullPointerException
    at java.lang.String.<init>(String.java:210)
    at org.mvel2.ast.ASTNode.toString(ASTNode.java:426)
    at org.mvel2.ast.Or.toString(Or.java:59)
    at java.lang.String.valueOf(String.java:2826)
    at java.lang.StringBuilder.append(StringBuilder.java:115)
    at
org.drools.rule.constraint.ConditionAnalyzer.analyzeNode(ConditionAnalyzer.java:247)
    at
org.drools.rule.constraint.ConditionAnalyzer.analyzeSingleCondition(ConditionAnalyzer.java:106)
    at
org.drools.rule.constraint.ConditionAnalyzer.analyzeCondition(ConditionAnalyzer.java:99)
    at
org.drools.rule.constraint.ConditionAnalyzer.analyzeCondition(ConditionAnalyzer.java:70)
    at
org.drools.rule.constraint.MvelConditionEvaluator.getAnalyzedCondition(MvelConditionEvaluator.java:83)
    at
org.drools.rule.constraint.MvelConstraint.executeJitting(MvelConstraint.java:270)
    at
org.drools.rule.constraint.MvelConstraint.access$200(MvelConstraint.java:51)
    at
org.drools.rule.constraint.MvelConstraint$ConditionJitter.run(MvelConstraint.java:250)
    at
java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)

Sean
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