PH26641: INDEXOUTOFBOUNDSEXCEPTION WHEN PERFORMING SOME OF APIS ON SDO LIST

APAR status

• Closed as program error.

Error description

• SDO works in a lazy parsing manner meaning data is not loaded
  until it's absolutely needed. In SDO have an implementation of
  the List interface which overrides methods in the List interface
   (with few exceptions listed below) to ensure items in the list
  are loaded/cached prior to doing the actual operation.
  
  
  
  The following methods do not ensure items are loaded and would
  cause java.lang.IndexOutOfBoundsException.
  
  * ListIterator<E> listIterator()
  
  * boolean removeAll(Collection<?> c)
  
  * List<E> subList(int fromIndex, int toIndex)
  

Local fix

• To get around this issue, we suggest calling size() first,
  which is a lightweight operation, to ensure that items are
  loaded.
  

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server                                      *
  ****************************************************************
  * PROBLEM DESCRIPTION: java.lang.IndexOutOfBoundsException     *
  *                      when                                    *
  *                      performing some of APIs on SDO list     *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  SDO works in a lazy parsing manner meaning data is not loaded
  until it is absolutely needed. SDO has an implementation of
  the List interface which overrides methods in the underlying
  List
  class (with few exceptions listed below) to ensure items in the
  list are loaded/cached prior to doing the actual operation.
  The following methods do not ensure items are loaded and would
  cause java.lang.IndexOutOfBoundsException.
  * ListIterator<E> listIterator()
  * boolean removeAll(Collection<?> c)
  * List<E> subList(int fromIndex, int toIndex)
  

Problem conclusion

• SDO List implementation is updated to ensure items are cached an
  loaded on all LIST API methods.
  
  The fix for this APAR is targeted for inclusion in fix pack
  8.5.5.19 and 9.0.5.7. For more information, see 'Recommended
  Updates for WebSphere Application Server':
  https://www.ibm.com/support/pages/node/715553
  

Temporary fix

• Calling 'size()' method on a SDO List forces items to be loaded
  and would prevent the java.lang.IndexOutOfBoundsException.
  

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

  WEBS APP SERV N

• Fixed component ID

  5724H8800

Applicable component levels

• R850 PSY

     UP

• R900 PSY

     UP