PI32805: JAVA.LANG.ARRAYINDEXOUTOFBOUNDSEXCEPTION THROWN BY COM.IBM.XML.XLXP2.API.UTIL.DATABUFFERHELPER.COMPUTE

8.5.5.7: WebSphere Application Server V8.5.5 Fix Pack 7
8.5.5.8: WebSphere Application Server V8.5.5 Fix Pack 8
8.5.5.9: WebSphere Application Server V8.5.5 Fix Pack 9
8.5.5.10: WebSphere Application Server V8.5.5 Fix Pack 10
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
8.5.5.20: WebSphere Application Server V8.5.5.20
8.5.5.18: WebSphere Application Server V8.5.5 Fix Pack 18
8.5.5.19: WebSphere Application Server V8.5.5 Fix Pack 19
8.5.5.16: WebSphere Application Server V8.5.5 Fix Pack 16
8.5.5.21: WebSphere Application Server V8.5.5.21

APAR status

• Closed as program error.

Error description

• While the XML parser is handling data via the multiple buffers
  in which it stores, a
  java.lang.ArrayIndexOutOfBoundsException may be thrown due to
  an illegal access of a byte array data structure.
  
  The top of the exceptoin stack will look like this:
  
  java.lang.ArrayIndexOutOfBoundsException
  at
  com.ibm.xml.xlxp2.api.util.DataBufferHelper.computeCoords10(Data
  BufferHelper.java:116)
  at
  com.ibm.xml.xlxp2.api.util.encoding.ByteStreamDataSource.load(By
  teStreamDataSource.java:218)
  at
  com.ibm.xml.xlxp2.scan.util.ParsedEntity.loadMore(ParsedEntity.j
  ava:230)
  at
  com.ibm.xml.xlxp2.scan.util.ParsedEntity.skipBytesUsingMap(Parse
  dEntity.java:997)
  at
  com.ibm.xml.xlxp2.scan.DocumentScanner.scanRemainingAttValue(Doc
  umentScanner.java:2443)
  ...
  This is similar to PI16073 except this issue
  occurs in the standalone XML parser versus in
  the feature pack parser.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  All users of IBM WebSphere Application      *
  *                  Server V8.5.                                *
  ****************************************************************
  * PROBLEM DESCRIPTION: ArrayIndexOutOfBoundsException may be   *
  *                      thrown by                               *
  *                      com.ibm.xml.xlxp2.api.util.DataBufferHe *
  *                      lper.computeCoords10                    *
  ****************************************************************
  * RECOMMENDATION:  Install a fix pack that contains this       *
  *                  APAR.                                       *
  ****************************************************************
  A DataBufferHelper utility is used
  for handling line numbers for parser
  related errors. An ArrayIndexOutOfBoundsException may be
  thrown due to the handing of an edge case of the particular
  data structure.
  The top of the exceptoin stack will look like this:
  java.lang.ArrayIndexOutOfBoundsException
  at
  com.ibm.xml.xlxp2.api.util.DataBufferHelper.computeCoords10(Data
  BufferHelper.java:116)
  at
  com.ibm.xml.xlxp2.api.util.encoding.ByteStreamDataSource.load(By
  teStreamDataSource.java:218)
  at
  com.ibm.xml.xlxp2.scan.util.ParsedEntity.loadMore(ParsedEntity.j
  ava:230)
  at
  com.ibm.xml.xlxp2.scan.util.ParsedEntity.skipBytesUsingMap(Parse
  dEntity.java:997)
  at
  com.ibm.xml.xlxp2.scan.DocumentScanner.scanRemainingAttValue(Doc
  umentScanner.java:2443)
  

Problem conclusion

• The ArrayIndexOutOfBoundsException is apparent in the utility
  class DataBufferHelper. There is no check for the edge case of
  when the end position of an offset is less than the start
  position of an offset. The solution implies ensuring that this
  condition is met before processing contents of the byte array.
  
  E.g. endOfOffset = -1 and startOfOffset = 0. This would imply
  to reference array[-1], which is the cause of an
  ArrayIndextOutOfBoundsException.
  
  The fix for this APAR is currently targeted for inclusion in
  Fix Pack 8.5.5.7 of WebSphere Application Server V8.5.
  
  Please refer to the Recommended Updates page for delivery
  information:
  http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
  
  In addition, please refer to URL:
  http://www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
  for Fix Pack PTF information.
  

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

  WEBSPHERE FOR Z

• Fixed component ID

  5655I3500

Applicable component levels

• R850 PSY

     UP