IV13214: IBM JAVA 7 IS PRODUCING DIFFERENT SERIALIZATION TO IBM JAVA 6, O RACLE JAVA 6 AND ORACLE JAVA 7 TO READ

APAR status

• Closed as program error.

Error description

• Error Message: If serializes a BigDecimal that has a value of 0
  using Java 7, and deserializes it using Oracle or Java6, the
  following Exception is thrown:
  java.io.StreamCorruptedException: BigInteger: signum-magnitude
  mismatch
   at java.math.BigInteger.readObject(BigInteger.java:3113)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at
  sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessor
  Impl.java:57)
   at
  sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethod
  AccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:601)
   at
  java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.jav
  a:991)
   at
  java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:
  1866)
   at
  java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.j
  ava:1771)
   at
  java.io.ObjectInputStream.readObject0(ObjectInputStream.java:134
  7)
   at
  java.io.ObjectInputStream.defaultReadFields(ObjectInputStream.ja
  va:1964)
   at
  java.io.ObjectInputStream.defaultReadObject(ObjectInputStream.ja
  va:498)
   at java.math.BigDecimal.readObject(BigDecimal.java:3555)
   at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
   at
  sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessor
  Impl.java:57)
   at
  sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethod
  AccessorImpl.java:43)
   at java.lang.reflect.Method.invoke(Method.java:601)
   at
  java.io.ObjectStreamClass.invokeReadObject(ObjectStreamClass.jav
  a:991)
   at
  java.io.ObjectInputStream.readSerialData(ObjectInputStream.java:
  1866)
   at
  java.io.ObjectInputStream.readOrdinaryObject(ObjectInputStream.j
  ava:1771)
   at
  java.io.ObjectInputStream.readObject0(ObjectInputStream.java:134
  7)
   at
  java.io.ObjectInputStream.readObject(ObjectInputStream.java:369)
  .
  Stack Trace: N/A
  .
  

Local fix

Problem summary

• Serializing BigInteger object with IBM 7.0 JDK and
  de-serializing
  the same with IBM 6.0 JDK fails with
  java.io.StreamCorruptedException as
  reported. whereas serialization with 6.0 JDK and deserialization
  with
  7.0 JDK result in success (no exceptions).
  

Problem conclusion

• This defect will be fixed in:
  7.0.0 SR1
  .
  The solution is to check and modify the writeObject of
  BigInteger in Java7.
  

Temporary fix

• ZE FIX ERROR IV28955 12/10/05
  

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

  JAVA CLASS LIBS

• Fixed component ID

  620700130

Applicable component levels

• R700 PSY

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