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PI85865: NULLPOINTEREXCEPTION IN LRUHASHMAP

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APAR status

  • Closed as program error.

Error description

  • A NullPointerException in LRUHashMap occurs
    
    com.ibm.ws.webcontainer.webapp.WebApp logServletError SRVE0293E:
    [Servlet Error]-[RestServices]: java.lang.NullPointerException
    at com.ibm.ws.session.utils.LRUHashMap.put(LRUHashMap.java:142)
    at
    com.ibm.ws.session.store.common.BackedHashMap.superPut(BackedHas
    hMap.java:676)
    at
    com.ibm.ws.session.store.mtm.MTMHashMap.superPut(MTMHashMap.java
    :579)
    at
    com.ibm.ws.session.store.common.BackedHashMap.put(BackedHashMap.
    java:618)
    at
    com.ibm.ws.session.store.common.BackedStore.createSession(Backed
    Store.java:237)
        at
    com.ibm.ws.session.SessionManager.createISession(SessionManager.
    java:247)
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server                                      *
    *                  users who use Memory-to-memory session      *
    *                  replication configuration                   *
    ****************************************************************
    * PROBLEM DESCRIPTION: The LRU (Least Recently Used) session   *
    *                      table may give NullPointerException     *
    ****************************************************************
    * RECOMMENDATION:                                              *
    *                                                              *
    ****************************************************************
    In the event of the LRU session table full condition during
    put() method, NullPointerException may be thrown.
    

Problem conclusion

  • Code changes were made to handle the sessions are replaced
    correctly in the LRU session table.
    The fix for this APAR is currently targeted for inclusion in
    fix pack 8.5.5.13 and 9.0.0.7  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

    PI85865

  • Reported component name

    WEBS APP SERV N

  • Reported component ID

    5724H8800

  • Reported release

    850

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2017-08-14

  • Closed date

    2017-10-25

  • Last modified date

    2017-10-25

  • 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

[{"Business Unit":{"code":"BU053","label":"Cloud \u0026 Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"850","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
19 October 2021