[jboss-jira] [JBoss JIRA] (DROOLS-2517) NullPointerException in BaseClassFieldReader.writeExternal() when a global method is used in LHS and serialize package

[Toshiya Kobayashi (JIRA)]

     [ https://issues.jboss.org/browse/DROOLS-2517?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Toshiya Kobayashi updated DROOLS-2517:
--------------------------------------
    Git Pull Request: https://github.com/kiegroup/drools/pull/1885


> NullPointerException in BaseClassFieldReader.writeExternal() when a global method is used in LHS and serialize package
> ----------------------------------------------------------------------------------------------------------------------
>
>                 Key: DROOLS-2517
>                 URL: https://issues.jboss.org/browse/DROOLS-2517
>             Project: Drools
>          Issue Type: Bug
>          Components: core engine
>    Affects Versions: 7.7.0.Final
>            Reporter: Toshiya Kobayashi
>            Assignee: Mario Fusco
>              Labels: support
>
> Under the conditions:
> * A rule uses a method of global variable in LHS. e.g. Person(myUtil.transform(name) == "John-san")
> * A package is serialized
> Serializing the package throws NullPointerException.
> {noformat}
> java.lang.NullPointerException: null
> 	at org.drools.core.base.BaseClassFieldReader.writeExternal(BaseClassFieldReader.java:196)
> 	at org.drools.core.base.extractors.MVELObjectClassFieldReader.writeExternal(MVELObjectClassFieldReader.java:72)
> 	at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1459)
> 	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1430)
> 	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
> 	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
> 	at org.drools.core.base.ClassFieldAccessorStore$FieldLookupEntry.writeExternal(ClassFieldAccessorStore.java:384)
> 	at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1459)
> 	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1430)
> 	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
> 	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
> 	at java.util.concurrent.ConcurrentHashMap.writeObject(ConcurrentHashMap.java:1413)
> 	at sun.reflect.GeneratedMethodAccessor6.invoke(Unknown Source)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:497)
> 	at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1028)
> 	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
> 	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
> 	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
> 	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
> 	at org.drools.core.base.ClassFieldAccessorStore.writeExternal(ClassFieldAccessorStore.java:61)
> 	at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1459)
> 	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1430)
> 	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
> 	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
> 	at org.drools.core.definitions.impl.KnowledgePackageImpl.writeExternal(KnowledgePackageImpl.java:250)
> 	at java.io.ObjectOutputStream.writeExternalData(ObjectOutputStream.java:1459)
> 	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1430)
> 	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
> 	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
> 	at java.util.ArrayList.writeObject(ArrayList.java:762)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> 	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
> 	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
> 	at java.lang.reflect.Method.invoke(Method.java:497)
> 	at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:1028)
> 	at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1496)
> 	at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1432)
> 	at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1178)
> 	at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:348)
> 	at org.drools.compiler.integrationtests.SerializedPackageMergeTest.testBuildAndSerializePackagesWithGlobalMethodInLHS(SerializedPackageMergeTest.java:244)
> {noformat}



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