IV13374: POOR PERFORMANCE OF XMLENCODER.WRITEOBJECT() WITH LARGE OBJECT

APAR status

• Closed as program error.

Error description

• Error Message: It will cost more than one hour when using
  XMLEncoder.writeObject to output a large object such as a vector
  with 300,000 elements. The spent time is not linear increased
  with the size of the object needs to be outputted. Outputting a
  vector with 100,000 elements may only cost several seconds.
  .
  Stack Trace: N/A
  .
  N/A
  

Local fix

• No
  

Problem summary

• The root cause is that there is a IdentityHashMap in XMLEncoder.
  Large number of elements will cause hash collision heavily in
  IdentityHashMap. And this is time costing.
  

Problem conclusion

• This defect will be fixed in:
  6.0.0 SR11
  6.0.1 SR2
  .
  With a functional fix, the IdentityHashMap is removed from
  XMLEncoder.
  

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