IZ87776: TYPE SAFETY ISSUE WITH CLASS.GETCONSTRUCTOR()

APAR status

• Closed as program error.

Error description

• Error Message: N/A
  .
  Stack Trace: N/A
  .
  In the following scenario, a NoSuchMethodException should be
  thrown from Class.getConstructor(), but is not thrown by the IBM
  JVM.
  1. We have two classes, TestClassA and TestClassB. TestClassA
  has a
     constructor which takes a TestClassB instance as a parameter.
  2. We load TestClassA on the system classloader, and load
  TestClassB on
     a custom classloader (via a call to defineClass()).
  3. We then try to locate the constructor in the TestClassA Class
  via
     reflection, specifying the TestClassB Class as the parameter
  type.
  

Local fix

Problem summary

• The problem is caused when the parameter types passed to
  java.lang.Class.getConstructor() match the signature of a
  constructor in the receiver, but do not match the parameter
  types loaded by the receiver's class loader.
  

Problem conclusion

• This defect will be fixed in:
  6.0.0 SR9
  .
  The JVM and the java.lang.Class.getConstructor() implementation
  have been updated to check that the parameter types passed to
  Class.getConstructor() match the parameter types loaded by the
  receiver's class loader, and to throw a NoSuchMethodException if
  the parameter types do not match.
  .
  To obtain the fix:
  Install build 20101013 or later
  

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:

Fix information

• Fixed component name

  J9 COMMON CODE

• Fixed component ID

  620700127

Applicable component levels

• R600 PSN

     UP