Details
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Bug
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Resolution: Done
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Major
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5.2.0.M1
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None
Description
Actually using 5.2.0-SNAPSHOT as of today (March 24, 2011).
I get this:
Caused by: java.lang.NullPointerException at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:323) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:268) at org.drools.rule.builder.PatternBuilder.build(PatternBuilder.java:107) at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:65) at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:39) at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:65) at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:39) at org.drools.rule.builder.GroupElementBuilder.build(GroupElementBuilder.java:65) at org.drools.rule.builder.RuleBuilder.build(RuleBuilder.java:80) at org.drools.compiler.PackageBuilder.addRule(PackageBuilder.java:1313) at org.drools.compiler.PackageBuilder.addPackage(PackageBuilder.java:664) at org.drools.compiler.PackageBuilder.addPackageFromDrl(PackageBuilder.java:310) at org.drools.compiler.PackageBuilder.addKnowledgeResource(PackageBuilder.java:483) at org.drools.builder.impl.KnowledgeBuilderImpl.add(KnowledgeBuilderImpl.java:28) at org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:697) at org.drools.agent.impl.KnowledgeAgentImpl.createPackageFromResource(KnowledgeAgentImpl.java:675) at org.drools.agent.impl.KnowledgeAgentImpl.incrementalBuildResources(KnowledgeAgentImpl.java:882) at org.drools.agent.impl.KnowledgeAgentImpl.buildKnowledgeBase(KnowledgeAgentImpl.java:644) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:188) at org.drools.agent.impl.KnowledgeAgentImpl.applyChangeSet(KnowledgeAgentImpl.java:170)
This is on a monstrous rules file that has compiled fine for months.
The line in question says this:
for ( Iterator<BaseDescr> it = result.getDescrs().iterator(); it.hasNext(); ) {
I have not yet fired up the debugger to see which rule is causing the problem.
From reading other bug reports, it might be that getDescrs() returns null.
