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RS01915: NULLPOINTEREXCEPTION WHEN DEBUGGING A RULESET WITH THE DECISION ENGINE

Fixes are available

Operational Decision Manager V8.7.0.1 Fix Pack
Operational Decision Manager V8.7.1 Download Document
Operational Decision Manager V8.7.1 Refresh Pack

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APAR status

  • Closed as program error.

Error description

  • Loading a DE ruleset in debug mode throws the following
exception:
Caused by: java.lang.NullPointerException: Variable type is
null
    at com.ibm.rules.engine.lang.semantics.
SemLocalVariableDeclaration.<init>(SemLocalVariableDeclaration.
java:68)
    at com.ibm.rules.engine.lang.semantics.
SemLanguageFactoryImpl.declareVariable(SemLanguageFactoryImpl.
java:487)
    at com.ibm.rules.engine.lang.semantics.
SemLanguageFactoryImpl.declareVariable(SemLanguageFactoryImpl.
java:478)
    at com.ibm.rules.engine.transform.debug.impl.
SemDebugStatementTransformer.visit(SemDebugStatementTransformer.

java:205)
    at com.ibm.rules.engine.transform.debug.impl.
SemDebugStatementTransformer.visit(SemDebugStatementTransformer.

java:49)
    at com.ibm.rules.engine.lang.semantics.SemReturn.accept(
SemReturn.java:57)
    at com.ibm.rules.engine.lang.semantics.transform.statement.
SemStatementCopier.transformStatement(SemStatementCopier.java:
88)
    at com.ibm.rules.engine.transform.debug.impl.
SemDebugStatementTransformer.transformSelectedNotifiedStatement(

SemDebugStatementTransformer.java:85)
    at com.ibm.rules.engine.transform.debug.impl.
SemDebugStatementTransformer.transformStatement(
SemDebugStatementTransformer.java:181)
    at com.ibm.rules.engine.lang.semantics.transform.
SemMainLangTransformer.transformStatement(
SemMainLangTransformer.java:610)
    at com.ibm.rules.engine.lang.semantics.transform.
SemMainLangTransformer.transformStatements(
SemMainLangTransformer.java:758)
    at com.ibm.rules.engine.lang.semantics.transform.
BaseTransformer.mainTransformStatements(BaseTransformer.java:
472)
    at com.ibm.rules.engine.lang.semantics.transform.statement.
SemStatementCopier.transformBlock(SemStatementCopier.java:113)
    at com.ibm.rules.engine.lang.semantics.transform.
SemMainLangTransformer.transformBlock(SemMainLangTransformer.
java:628)
    at com.ibm.rules.engine.lang.semantics.transform.
BaseTransformer.mainTransformBlock(BaseTransformer.java:412)
    at com.ibm.rules.engine.lang.semantics.transform.statement.
SemStatementCopier.visit(SemStatementCopier.java:251)
    at com.ibm.rules.engine.lang.semantics.transform.statement.
SemStatementCopier.visit(SemStatementCopier.java:57)
    at com.ibm.rules.engine.lang.semantics.SemIf.accept(SemIf.
java:74)
    at com.ibm.rules.engine.lang.semantics.transform.statement.
SemStatementCopier.transformStatement(SemStatementCopier.java:
88)
    at com.ibm.rules.engine.transform.debug.impl.
SemDebugStatementTransformer.transformSelectedNotifiedStatement(

SemDebugStatementTransformer.java:85)
    at com.ibm.rules.engine.transform.debug.impl.
SemDebugStatementTransformer.transformStatement(
SemDebugStatementTransformer.java:181)
    at com.ibm.rules.engine.lang.semantics.transform.
SemMainLangTransformer.transformStatement(
SemMainLangTransformer.java:610)
    at com.ibm.rules.engine.lang.semantics.transform.
SemMainLangTransformer.transformStatements(
SemMainLangTransformer.java:758)
    at com.ibm.rules.engine.lang.semantics.transform.
BaseTransformer.mainTransformStatements(BaseTransformer.java:
472)
    at com.ibm.rules.engine.lang.semantics.transform.member.
SemMemberImplementationCopier.visit(
SemMemberImplementationCopier.java:182)
    at com.ibm.rules.engine.lang.semantics.transform.member.
SemMemberImplementationCopier.visit(
SemMemberImplementationCopier.java:56)
    at com.ibm.rules.engine.lang.semantics.SemMethod$
DynamicImplementation.accept(SemMethod.java:62)
    at com.ibm.rules.engine.lang.semantics.transform.member.
SemMemberImplementationCopier.transformMemberImplementation(
SemMemberImplementationCopier.java:80)
    at com.ibm.rules.engine.lang.semantics.transform.
SemMainLangTransformer.transformMemberImplementation(
SemMainLangTransformer.java:547)
    at com.ibm.rules.engine.lang.semantics.transform.
BaseTransformer.mainTransformMemberImplementation(
BaseTransformer.java:359)
    at com.ibm.rules.engine.lang.semantics.transform.member.
SemMethodCopier.transformMethodBody(SemMethodCopier.java:178)
    at com.ibm.rules.engine.transform.debug.impl.
SemDebugMethodTransformer.transformMethodBody(
SemDebugMethodTransformer.java:60)
    at com.ibm.rules.engine.lang.semantics.transform.
SemMainLangTransformer.transformMethodBody(
SemMainLangTransformer.java:447)
    at com.ibm.rules.engine.lang.semantics.transform.
BaseTransformer.mainTransformMethodBody(BaseTransformer.java:
259)
    at com.ibm.rules.engine.lang.semantics.transform.type.
SemClassCopier.transformMethodBodies(SemClassCopier.java:271)
    at com.ibm.rules.engine.lang.semantics.transform.type.
SemClassCopier.transformMemberBodies(SemClassCopier.java:166)
    at com.ibm.rules.engine.lang.semantics.transform.type.
SemClassCopier.transformMemberBodies(SemClassCopier.java:153)
    at com.ibm.rules.engine.transform.debug.impl.
SemDebugTypeTransformer.transformMemberBodies(
SemDebugTypeTransformer.java:69)
    at com.ibm.rules.engine.lang.semantics.transform.
SemMainLangTransformer.transformMemberBodies(
SemMainLangTransformer.java:311)
    at com.ibm.rules.engine.lang.semantics.transform.
SemMainLangTransformer.transformMemberBodies(
SemMainLangTransformer.java:272)
    at com.ibm.rules.engine.lang.semantics.transform.
SemMainLangTransformer.transformObjectModel(
SemMainLangTransformer.java:247)
    at com.ibm.rules.engine.transform.debug.impl.
SemDebugMainLangTransformer.transformObjectModel(
SemDebugMainLangTransformer.java:61)
    at com.ibm.rules.engine.transform.debug.impl.
SemLocationModelRewriter.transform(SemLocationModelRewriter.
java:58)
    at com.ibm.rules.engine.outline.EngineOutlineImpl.
applyModelRewriter(EngineOutlineImpl.java:444)
    at com.ibm.rules.engine.outline.EngineOutlineImpl.
applyModelRewriters(EngineOutlineImpl.java:415)
    at com.ibm.rules.engine.outline.EngineOutlineImpl.
writeJarInStream(EngineOutlineImpl.java:516)
    at com.ibm.rules.engine.load.XUEngineLoader.
createEngineDefinitionInDebugFromDSAR(XUEngineLoader.java:217)

Local fix

  • The engine does not handle properly null value returned in a
block in a  b2x method. In order to avoid the problem use and
intermediary variable.
Instead of return null;    use
Object obj = null; return obj;

Problem summary

  • Incorrect rule code generation for  null value.

Problem conclusion

  • The code is fixed

Temporary fix

  • 



Comments


    

  • 



APAR Information




    

  • APAR number
    RS01915
    • 

  • Reported component name
    WDS FOR RULES
    • 

  • Reported component ID
    5725B6903
    • 

  • Reported release
    870
    • 

  • Status
    CLOSED  PER
    • 

  • PE
    NoPE
    • 

  • HIPER
    NoHIPER
    • 

  • Special Attention
    NoSpecatt
    • 

  • Submitted date
    2015-02-26
    • 

  • Closed date
    2015-03-07
    • 

  • Last modified date
    2015-03-07
    • 





    

  • APAR is sysrouted FROM one or more of the following:
    

    • 

  • APAR is sysrouted TO one or more of the following:
    

    • 



Modules/Macros


    

  • 999

    



Fix information


    

  • Fixed component name
    WDS FOR RULES
    • 

  • Fixed component ID
    5725B6903
    • 



Applicable component levels


    

  • R870  PSY
       UP
    • 








      
              
                            

              

              [{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSQP76","label":"IBM Operational Decision Manager"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"870","Line of Business":{"code":"LOB45","label":"Automation"}}]
              

                          

          
 
        

      

    

      

        

          

            
Document Information


            

            


                        

            Modified date:
            

            17 February 2022
            

            
                      

        


        

        


      

    

  



    

  

  
    
            

          
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