RS01671: INCORRECT BYTECODE GENERATION WHEN "FOR" LOOP HAS SEVERAL INITIA LIZATIONS OR INCREMENTS

Operational Decision Manager V8.5.1.2 Fix Pack
Operational Decision Manager V8.6.0.2 Fix Pack
Operational Decison Manager z/OS 8.7.1.2 Fix Pack
Operational Decision Manager V8.5.1.1: Interim Fix 37

APAR status

• Closed as program error.

Error description

• When a for loop has multiple initializations or increments (
  separated by a coma)  the ruleset execution may fail with an
  exception such as:
  Exception in thread "main" java.lang.ClassFormatError:
  JVMCFRE074 no Code attribute specified;
  class=com/ibm/rules/generated/EngineDataClass,
  method=myFunction()V, pc=0
      at java.lang.ClassLoader.defineClass(ClassLoader.java:306)
      at java.lang.ClassLoader.defineClass(ClassLoader.java:1526)
      at com.ibm.rules.engine.load.NativeEngineLoader$
  JarStreamClassLoader.findClass(NativeEngineLoader.java:328)
      at java.lang.ClassLoader.loadClassHelper(ClassLoader.java:
  760)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:737)
      at java.lang.ClassLoader.loadClass(ClassLoader.java:707)
      at com.ibm.brl.generated.engine.ReteEngine.
  createRuleEngineInput(Unknown Source)
      at com.ibm.rules.engine.rete.runtime.AbstractReteEngine.
  createInput(AbstractReteEngine.java:126)
      at com.ibm.rules.studio.rve.launch.main.RveRulesetMain.main(
  RveRulesetMain.java:65)
  With such incorrect bytecode in a ruleset, a JVM running with -
  Xverify:none may not detect the problem during bytecode
  verification, and the JVM may crash with a crash report such as:
  # A fatal error has been detected by the Java Runtime
  Environment:
  # EXCEPTION_ACCESS_VIOLATION (0xc0000005) at pc=0x02e8a6d9,
  pid=38728, tid=38908
  # JRE version: 6.0_27-b07
  # Java VM: Java HotSpot(TM) Client VM (20.2-b06 mixed mode
  windows-x86 )
  # Problematic frame:
  # j com.ibm.rules.generated.EngineDataClass.myFunction()Z+0
  ....
  

Local fix

• replace the for loop with an equivalent while loop
  

Problem summary

• incorrect code generation with for loop
  

Problem conclusion

• code is fixed
  

Temporary fix

Comments

APAR Information

• 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

  WS DECISION SVR

• Fixed component ID

  5725B6901

Applicable component levels

• R851 PSY

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