Description
Consider the following sequence of events:
- serialize a set of text rule files
- create a binary file for the serialized rule files
- deserialize the binary file created in the step 2.
When each step is executed in different JVM runs, step 3 fails with a NullPointerException:
java.lang.NullPointerException: null at org.drools.core.reteoo.CompositeObjectSinkAdapter.isHashable(CompositeObjectSinkAdapter.java:158) at org.drools.core.reteoo.CompositeObjectSinkAdapter.getHashableAccessor(CompositeObjectSinkAdapter.java:149) at org.drools.core.reteoo.CompositeObjectSinkAdapter.addObjectSink(CompositeObjectSinkAdapter.java:108) at org.drools.core.reteoo.SingleObjectSinkAdapter.addObjectSink(SingleObjectSinkAdapter.java:55) at org.drools.core.reteoo.ObjectSource.addObjectSink(ObjectSource.java:216) at org.drools.core.reteoo.LeftInputAdapterNode.attach(LeftInputAdapterNode.java:155) at org.drools.core.reteoo.builder.BuildUtils.attachNode(BuildUtils.java:141) at org.drools.core.reteoo.builder.GroupElementBuilder$AndBuilder.buildTupleSource(GroupElementBuilder.java:126) at org.drools.core.reteoo.builder.GroupElementBuilder$AndBuilder.build(GroupElementBuilder.java:109) at org.drools.core.reteoo.builder.GroupElementBuilder.build(GroupElementBuilder.java:68) at org.drools.core.reteoo.builder.ReteooRuleBuilder.addSubRule(ReteooRuleBuilder.java:161) at org.drools.core.reteoo.builder.ReteooRuleBuilder.addRule(ReteooRuleBuilder.java:133) at org.drools.core.reteoo.ReteooBuilder.addRule(ReteooBuilder.java:110) at org.drools.core.impl.KnowledgeBaseImpl.internalAddRule(KnowledgeBaseImpl.java:1526) at org.drools.core.impl.KnowledgeBaseImpl.internalAddPackages(KnowledgeBaseImpl.java:915) at org.drools.core.impl.KnowledgeBaseImpl.lambda$addPackages$1(KnowledgeBaseImpl.java:717) at org.drools.core.impl.KnowledgeBaseImpl.enqueueModification(KnowledgeBaseImpl.java:734) at org.drools.core.impl.KnowledgeBaseImpl.addPackages(KnowledgeBaseImpl.java:717) at org.drools.compiler.integrationtests.SerializedPackageMergeTwoSteps2Test.testBuildAndSerializePackagesInTwoSteps2(SerializedPackageMergeTwoSteps2Test.java:88)
If making one single run for all 3 steps, everything works fine.
The problem are inconsistent hashCode values for the AccessorKey object when the JVM is restarted, due to the usage of Enum.hashCode:
https://github.com/kiegroup/drools/blob/master/drools-core/src/main/java/org/drools/core/base/AccessorKey.java#L48
Attachments
Issue Links
- clones
-
DROOLS-2224 Inconsistent values returned by AccessorKey.hashCode causes NullPointerException during binary deserialization
-
- Closed
-
-
-
- Closed
-
