LO67238: LS2J CRASH WHEN NULL RETURNED BY JAVA METHOD DECLARED AS RETURNING STRING[]

APAR status

• Closed as fixed if next.

Error description

• Error Description￘
  Abstract:
  
  LS2J crash when null returned by Java method declared as
  returning String[]
  
  
  Problem Description:
  
  LS2J crashes when a Java method declared as returning array of
  String returns null.
  For example, using this code using the LS2J JavaObject class
       results = myJavaObject.returnNullForStringArray()
  calling this Java method
       public String[] returnNullForStringArray() {
            return null;
       }
  Results in a crash, whether the method is run on the server, or
  the client.
  
  
  Crash from this test case has been reproduced on Domino
  7.0.3FP1 and Domino 8.5.3.
  
  Crash stack from 8.5.3 Server includes
  
  j9vm24._getArrayLength@8+32
  nJAVACON.RF_Array::getValue+49
  nJAVACON.JavaMethodADT::Invoke+548
  nJAVACON.JavaObjectADT::ClassControl+731
  nnotes.LSsInstance::AdtCallBack+269
  nnotes.LScObjCli::ProdMethodCall+61
  nnotes.LSsThread::AdtCallMethodExp+154
  nnotes.LSsThread::NRun+6137
  
  Crash stack from 7.0.3 Server includes
  
  jvm.IBM_GetInterface@4+20422
  nJAVACON.JavaMethodADT::Invoke+487
  nJAVACON.JavaObjectADT::ClassControl+731
  nnotes.LSsInstance::AdtCallBack+269
  nnotes.LScObjCli::ProdMethodCall+61
  nnotes.LSsThread::AdtCallMethodExp+154
  nnotes.LSsThread::NRun+5916
  
  
  Some related cases
  
  A. No crash occurs if the method returns a String[] containing
  1 or more Strings.
  B. No crash occurs if the method is declared to return just
  String, not String[].
  C. An error indication occurs if the method returns an empty
  array of Strings, new String[]{}
  D. A similar crash occurs if String[] function returns null via
  JavaMethod Invoke().
       Set myMethod = myClass.GetMethod(
          "returnNullForStringArray",
          "()[Ljava/lang/String;" )
       results = myMethod.Invoke(myObject)
  

Local fix

• Local Fix￘
  Have LSJ2 call the original Java method via an intermediate
  Java code subsituting an alternative value, such as new
  String[]{""} when the original method returns null.
  

Problem summary

• This APAR is closed as FIN. We have deferred the fix to a
   future release.
  

Problem conclusion

Temporary fix

Comments

• This APAR is associated with SPR# JDAE8RC524.
  This APAR is closed as FIN. We have deferred the fix to a
   future release.
  

APAR Information

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

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

Fix information

Applicable component levels

• R853 PSN

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