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PM74368: ORG.APACHE.COMMONS.EL.EXPRESSIONEVALUATORIMPL CACHE CONTROL MISSING

Fixes are available

8.5.0.2: WebSphere Application Server V8.5 Fix Pack 2
8.0.0.6: WebSphere Application Server V8.0 Fix Pack 6
7.0.0.29: WebSphere Application Server V7.0 Fix Pack 29
8.0.0.7: WebSphere Application Server V8.0 Fix Pack 7
8.0.0.8: WebSphere Application Server V8.0 Fix Pack 8
7.0.0.31: WebSphere Application Server V7.0 Fix Pack 31
7.0.0.33: WebSphere Application Server V7.0 Fix Pack 33
8.0.0.9: WebSphere Application Server V8.0 Fix Pack 9
7.0.0.35: WebSphere Application Server V7.0 Fix Pack 35
8.0.0.10: WebSphere Application Server V8.0 Fix Pack 10
7.0.0.37: WebSphere Application Server V7.0 Fix Pack 37
8.0.0.11: WebSphere Application Server V8.0 Fix Pack 11
7.0.0.39: WebSphere Application Server V7.0 Fix Pack 39
8.0.0.12: WebSphere Application Server V8.0 Fix Pack 12
7.0.0.41: WebSphere Application Server V7.0 Fix Pack 41
8.0.0.13: WebSphere Application Server V8.0 Fix Pack 13
7.0.0.43: WebSphere Application Server V7.0 Fix Pack 43
8.0.0.14: WebSphere Application Server V8.0 Fix Pack 14
7.0.0.45: WebSphere Application Server V7.0 Fix Pack 45
8.0.0.15: WebSphere Application Server V8.0 Fix Pack 15
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

  • Since the switch from the Commons Expression Language (EL)
    code to unified EL code in the WebSphere Application Server
    V7.0 and above used by the JSP Container, the previously
    available mechanism of controlling EL caching through the
    com.ibm.wsspi.jsp.disableElCache WebContainer custom property
    was removed. However, the Commons EL implementation is still
    shipped with WebSphere Application Server and in some cases
    still used by customer applications.
    This APAR restores that EL caching control at the JVM level
    with a new custom property.
    

Local fix

  • modify application code to use the newer unified EL libraries
    

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  IBM WebSphere Application Server Version    *
    *                  7.0, 8.0 and 8.5 users of Apache Commons    *
    *                  EL.                                         *
    ****************************************************************
    * PROBLEM DESCRIPTION: Applications directly importing         *
    *                      Apache Commons EL classes will have     *
    *                      their expressions, values, and any      *
    *                      converted values cached by the          *
    *                      expression evaluator with no regard     *
    *                      to size.                                *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    Applications that directly use the Commons EL
    ExpressionEvaluator implementation class will have each unique
    expression it evaluates cached in a hash map, as well as
    expressions converted value. This can lead to a lot of memory
    consumption for applications that have a large number of
    unique expressions which in some cases can lead to out of
    memory conditions.
    

Problem conclusion

  • The Commons EL code packaged in WebSphere Application Server
    was modified to allow the caching to be bypassed.  To bypass
    the cache, the following JVM custom property must be set to
    true:
    
    property: com.ibm.disableCommonsElCache
    values:  true / false (default)
    
    The fix for this APAR is currently targeted for inclusion in
    fix packs 7.0.0.29, 8.0.0.6, and 8.5.0.2.  Please refer to the
    Recommended Updates page for delivery information:
    http://www.ibm.com/support/docview.wss?rs=180&uid=swg27004980
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM74368

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    700

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-10-04

  • Closed date

    2012-12-05

  • Last modified date

    2012-12-05

  • 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

  • R700 PSY

       UP

  • R800 PSY

       UP

  • R850 PSY

       UP



Document information

More support for: WebSphere Application Server
General

Software version: 7.0

Reference #: PM74368

Modified date: 05 December 2012