IBM Support

PM21145: NULLPOINTEREXCEPTION IN SAX PARSER WHILE HANDLING A JAX-RPC REQUEST.

Fixes are available

7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for AIX
7.0.0.15: Java SDK 1.6 SR9 Cumulative Fix for WebSphere Application Server
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for HP-UX
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for IBM i
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for Linux
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for Solaris
7.0.0.15: WebSphere Application Server V7.0 Fix Pack 15 for Windows
7.0.0.17: WebSphere Application Server V7.0 Fix Pack 17
7.0.0.17: Java SDK 1.6 SR9 FP1 Cumulative Fix for WebSphere Application Server
7.0.0.19: WebSphere Application Server V7.0 Fix Pack 19
7.0.0.21: WebSphere Application Server V7.0 Fix Pack 21
7.0.0.23: WebSphere Application Server V7.0 Fix Pack 23
7.0.0.25: WebSphere Application Server V7.0 Fix Pack 25
7.0.0.27: WebSphere Application Server V7.0 Fix Pack 27
7.0.0.29: WebSphere Application Server V7.0 Fix Pack 29
7.0.0.31: WebSphere Application Server V7.0 Fix Pack 31
7.0.0.27: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.33: WebSphere Application Server V7.0 Fix Pack 33
7.0.0.35: WebSphere Application Server V7.0 Fix Pack 35
7.0.0.37: WebSphere Application Server V7.0 Fix Pack 37
7.0.0.39: WebSphere Application Server V7.0 Fix Pack 39
7.0.0.41: WebSphere Application Server V7.0 Fix Pack 41
7.0.0.43: WebSphere Application Server V7.0 Fix Pack 43
7.0.0.45: WebSphere Application Server V7.0 Fix Pack 45
7.0.0.19: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.21: Java SDK 1.6 SR9 FP2 Cumulative Fix for WebSphere
7.0.0.23: Java SDK 1.6 SR10 FP1 Cumulative Fix for WebSphere
7.0.0.25: Java SDK 1.6 SR11 Cumulative Fix for WebSphere Application Server
7.0.0.27: Java SDK 1.6 SR12 Cumulative Fix for WebSphere Application Server
7.0.0.29: Java SDK 1.6 SR13 FP2 Cumulative Fix for WebSphere Application Server
7.0.0.45: Java SDK 1.6 SR16 FP60 Cumulative Fix for WebSphere Application Server
7.0.0.31: Java SDK 1.6 SR15 Cumulative Fix for WebSphere Application Server
7.0.0.35: Java SDK 1.6 SR16 FP1 Cumulative Fix for WebSphere Application Server
7.0.0.37: Java SDK 1.6 SR16 FP3 Cumulative Fix for WebSphere Application Server
7.0.0.39: Java SDK 1.6 SR16 FP7 Cumulative Fix for WebSphere Application Server
7.0.0.41: Java SDK 1.6 SR16 FP20 Cumulative Fix for WebSphere Application Server
7.0.0.43: Java SDK 1.6 SR16 FP41 Cumulative Fix for WebSphere Application Server
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APAR status

  • Closed as program error.

Error description

  • Under a load the following error can occur when parsing an
    incoming SOAP envelope:
    .
    java.lang.NullPointerException
    at
    com.ibm.xml.xlxp2.scan.util.SimpleDataBufferFactory$DataBufferRe
    ferrerQueue.remove(SimpleDataBufferFactory.java:91)
    at
    com.ibm.xml.xlxp2.scan.util.SimpleDataBufferFactory.removeReferr
    er(SimpleDataBufferFactory.java:237)
    at
    com.ibm.xml.xlxp2.scan.util.ParsedEntity.clear(ParsedEntity.java
    :190)
    ...
    at javax.xml.parsers.SAXParser.parse(Unknown Source)
    at
    com.ibm.ws.webservices.engine.utils.WebServicesParser.parse(WebS
    ervicesParser.java:374)
    ...
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All IBM WebSphere Application Server        *
    *                  users of JAX-RPC applications.              *
    ****************************************************************
    * PROBLEM DESCRIPTION: A NullPointerException might be thrown  *
    *                      by the SAX parser under heavy load.     *
    ****************************************************************
    * RECOMMENDATION:  Install a fix pack that contains this APAR. *
    ****************************************************************
    Under heavy load, the SAX parser used by the JAX-RPC runtime to
    parse incoming SOAP messages may throw a NullPointerException.
    
    Here is an example error:
    
    java.lang.NullPointerException
    at
    com.ibm.xml.xlxp2.scan.util.SimpleDataBufferFactory$DataBufferRe
    ferrerQueue.remove(SimpleDataBufferFactory.java:91)
    at
    com.ibm.xml.xlxp2.scan.util.SimpleDataBufferFactory.removeReferr
    er(SimpleDataBufferFactory.java:237)
    at
    com.ibm.xml.xlxp2.scan.util.ParsedEntity.clear(ParsedEntity.java
    :190)
    ...
    at javax.xml.parsers.SAXParser.parse(Unknown Source)
    at
    com.ibm.ws.webservices.engine.utils.WebServicesParser.parse(WebS
    ervicesParser.java:374)
    ...
    

Problem conclusion

  • After the SAX parser has been used by the JAX-RPC runtime
    for an extended period of time, the Just in Time (JIT) compiler
    will apply optimizations to the parser code. Due to a defect
    in the JIT (see APARs IZ70755 and IZ69786) a
    NullPointerException could be thrown from the JIT compiled
    code. To work around the issue in the JIT, a guard was added
    to the parser code which checks whether a field is null before
    dereferencing it.
    
    APAR PM21145 is currently targeted for inclusion in Service
    Level (Fix Pack) 7.0.0.15 of WebSphere Application Server V7.0.
    
    Please refer to URL:
    //www.ibm.com/support/docview.wss?rs=404&uid=swg27006970
    for Fix Pack availability.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM21145

  • Reported component name

    WEBSPHERE FOR Z

  • Reported component ID

    5655I3500

  • Reported release

    700

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2010-08-24

  • Closed date

    2010-09-15

  • Last modified date

    2011-04-04

  • 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

  • R700 PSY UK65060

       UP11/03/04 P F103

Fix is available

  • Select the PTF appropriate for your component level. You will be required to sign in. Distribution on physical media is not available in all countries.



Document information

More support for: WebSphere Application Server for z/OS
General

Software version: 7.0

Reference #: PM21145

Modified date: 04 April 2011