IV83633: PERFORMANCE DEGRADATION WITH JAVA.IO.DATAOUTPUTSTREAM.WRITEINT()

APAR status

• Closed as program error.

Error description

• Error Message:
  .
  Stack Trace:
  .
  N/A
  .
  Performance degradation observed with
  java.io.DataOutputStream.writeInt() and
  java.io.DataInputStream.readInt() in Jav 6 and above releases
  compared to Java 5.
  

Local fix

Problem summary

• The writeInt method of DataOutputStream writes each
  byte of an integer instead of writing the four bytes together.
  Similarly the readInt method of DataInputStream reads each byte
  of an integer instead of reading the four bytes together.
  

Problem conclusion

• JDK has been updated to read and write four bytes of Integer
  together in DataInputStream and DataOutputStream respectively.
  .
  This APAR will be fixed in the following Java Releases:
     6 R1 SR8 FP30  (6.1.8.30)
     7 R1 SR3 FP50  (7.1.3.50)
     7    SR9 FP50  (7.0.9.50)
     6    SR16 FP30 (6.0.16.30)
     8    SR3 FP10  (8.0.3.10)
  .
  Contact your IBM Product's Service Team for these Service
  Refreshes and Fix Packs.
  For those running stand-alone, information about the available
  Service Refreshes and Fix Packs can be found at:
             https://www.ibm.com/developerworks/java/jdk/
  

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

  JAVA CLASS LIBS

• Fixed component ID

  620700130

Applicable component levels

• R600 PSY

     UP

• R700 PSY

     UP

• R800 PSY

     UP