IBM Support

PM03329: CONCURRENTMODIFICATIONEXCEPTION IN CONSTRUCTINGCACHE

Subscribe

You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • Under heavy load, a ConcurrentModificationException occurs in Sy
    ncConstructingCache, or rather its parent class, the Constructin
    gCache. The following stacktrace is available in the trace.log
    12/10/09 9:38:08:945 GMT] 000000bb Servlet E
    com.ibm.wps.engine.Servlet handleException EJPEJ0070E: An except
    ion
    occurred while processing the request.
    java.util.ConcurrentModificationException: concurrent access to
    HashMap
    attempted by Thread[WebContainer : 0,5,main]
    at java.util.HashMap.onExit(HashMap.java(Inlined Compiled Code))
    at java.util.HashMap.transfer(HashMap.java(Compiled Code))
    at java.util.HashMap.resize(HashMap.java(Inlined Compiled Code))
    at java.util.HashMap.addEntry(HashMap.java(Compiled Code))
    at java.util.HashMap.put(HashMap.java(Compiled Code))
    at
    com.ibm.wps.state.utils.cache.CacheOnMap.put(CacheOnMap.java:82)
    at
    com.ibm.wps.state.utils.cache.ConstructingCache.createObject(Con
    structin
    gCache.java:85)
    at
    com.ibm.wps.state.utils.cache.ConstructingCache.get(Constructing
    Cache.ja
    va:102)
    at
    com.ibm.wps.state.inputmediators.CodecIDMapper.get(CodecIDMapper
    .java:87
    )
    at
    com.ibm.wps.state.outputmediators.PrefixOutputMediator.<init>(Pr
    efixOutp
    utMediator.java:80)
    

Local fix

  • none available
    

Problem summary

  • Under heavy load, a ConcurrentModificationException occurs in
    SyncConstructingCache, or rather its parent class, the
    ConstructingCache. The following stacktrace is available in the
    trace.log:
    
       12/10/09 9:38:08:945 GMT] 000000bb Servlet E
       com.ibm.wps.engine.Servlet handleException EJPEJ0070E: An
    exception occurred while processing the request.
       java.util.ConcurrentModificationException: concurrent access
    to HashMap attempted by Thread[WebContainer : 0,5,main]
       at java.util.HashMap.onExit(HashMap.java(Inlined Compiled
    Code))
       at java.util.HashMap.transfer(HashMap.java(Compiled Code))
       at java.util.HashMap.resize(HashMap.java(Inlined Compiled
    Code))
       at java.util.HashMap.addEntry(HashMap.java(Compiled Code))
       at java.util.HashMap.put(HashMap.java(Compiled Code))
       at
    
    com.ibm.wps.state.utils.cache.CacheOnMap.put(CacheOnMap.java:82)
       at
    
    com.ibm.wps.state.utils.cache.ConstructingCache.createObject(Con
    structingCache.java:85)
       at
    
    com.ibm.wps.state.utils.cache.ConstructingCache.get(Constructing
    Cache.java:102)
       at
    
    com.ibm.wps.state.inputmediators.CodecIDMapper.get(CodecIDMapper
    .java:87)
       at
    
    com.ibm.wps.state.outputmediators.PrefixOutputMediator.<init>(Pr
    efixOutputMediator.java:80)
    

Problem conclusion

  • This interim fix adds a missing synchronized statement to the
    get() method in SyncConstructingCache.
    
    Manual Steps:
       None
    
    Failing Module(s):
       Engine: State handling
    
    Affected Users:
       all users
    
    Version Information:
        Portal Version(s): 6.0.1.4
         Pre-Requisite(s):
          Co-Requisite(s): ---
    
        Portal Version(s): 6.0.1.5
         Pre-Requisite(s):
          Co-Requisite(s): ---
    
        Portal Version(s): 6.1.0.1
         Pre-Requisite(s):
          Co-Requisite(s): ---
    
        Portal Version(s): 6.1.0.2
         Pre-Requisite(s):
          Co-Requisite(s): ---
    
    Platform Specific:
       This fix applies to all platforms.
    
    A fix is available from Fix Central:
    
    http://www.ibm.com/eserver/support/fixes/fixcentral/swgquickorde
    r?apar=PM03329&productid=WebSphere%20Portal&brandid=5
    
    You may need to type or paste the complete address into your Web
    browser.
    

Temporary fix

Comments

APAR Information

  • APAR number

    PM03329

  • Reported component name

    WEBSPHERE PORTA

  • Reported component ID

    5724E7600

  • Reported release

    610

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2009-12-14

  • Closed date

    2009-12-22

  • Last modified date

    2010-02-01

  • 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 PORTA

  • Fixed component ID

    5724E7600

Applicable component levels

  • R60H PSY

       UP

  • R60J PSY

       UP

  • R61A PSY

       UP

  • R61B PSY

       UP

[{"Business Unit":{"code":"BU059","label":"IBM Software w\/o TPS"},"Product":{"code":"SSHRKX","label":"WebSphere Portal"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"6.1","Line of Business":{"code":"LOB31","label":"WCE Watson Marketing and Commerce"}}]

Document Information

Modified date:
20 December 2021