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PI70841: OpenJPA's ConfigurationImpl.loadGlobals() has java.util.ConcurrentModificationException

Fixes are available

9.0.0.2: WebSphere Application Server traditional V9.0 Fix Pack 2
8.5.5.11: WebSphere Application Server V8.5.5 Fix Pack 11
16.0.0.4: WebSphere Application Server Liberty 16.0.0.4
9.0.0.3: WebSphere Application Server traditional V9.0 Fix Pack 3
9.0.0.4: WebSphere Application Server traditional V9.0 Fix Pack 4
8.5.5.12: WebSphere Application Server V8.5.5 Fix Pack 12
9.0.0.5: WebSphere Application Server traditional V9.0 Fix Pack 5
9.0.0.6: WebSphere Application Server traditional V9.0 Fix Pack 6
8.5.5.13: WebSphere Application Server V8.5.5 Fix Pack 13
9.0.0.7: WebSphere Application Server traditional V9.0 Fix Pack 7
17.0.0.1: WebSphere Application Server Liberty 17.0.0.1
17.0.0.2: WebSphere Application Server Liberty 17.0.0.2
17.0.0.3: WebSphere Application Server Liberty 17.0.0.3
17.0.0.4: WebSphere Application Server Liberty 17.0.0.4
18.0.0.1: WebSphere Application Server Liberty 18.0.0.1
18.0.0.2: WebSphere Application Server Liberty 18.0.0.2
9.0.0.8: WebSphere Application Server traditional V9.0 Fix Pack 8
8.5.5.14: WebSphere Application Server V8.5.5 Fix Pack 14
9.0.0.9: WebSphere Application Server traditional V9.0 Fix Pack 9
18.0.0.3: WebSphere Application Server Liberty 18.0.0.3
9.0.0.10: WebSphere Application Server traditional V9.0 Fix Pack 10
18.0.0.4: WebSphere Application Server Liberty 18.0.0.4
19.0.0.1: WebSphere Application Server Liberty 19.0.0.1
8.5.5.15: WebSphere Application Server V8.5.5 Fix Pack 15
19.0.0.2: WebSphere Application Server Liberty 19.0.0.2
19.0.0.3: WebSphere Application Server Liberty 19.0.0.3
9.0.0.11: WebSphere Application Server traditional V9.0 Fix Pack 11
19.0.0.4: WebSphere Application Server Liberty 19.0.0.4
19.0.0.5: WebSphere Application Server Liberty 19.0.0.5
9.0.5.0: WebSphere Application Server traditional Version 9.0.5 Refresh Pack
19.0.0.6: WebSphere Application Server Liberty 19.0.0.6
19.0.0.7: WebSphere Application Server Liberty 19.0.0.7
19.0.0.8: WebSphere Application Server Liberty 19.0.0.8
9.0.5.1: WebSphere Application Server traditional Version 9.0.5 Fix Pack 1
19.0.0.9: WebSphere Application Server Liberty 19.0.0.9
19.0.0.10: WebSphere Application Server Liberty 19.0.0.10
19.0.0.11: WebSphere Application Server Liberty 19.0.0.11
9.0.5.2: WebSphere Application Server traditional Version 9.0.5 Fix Pack 2
19.0.0.12: WebSphere Application Server Liberty 19.0.0.12
20.0.0.1: WebSphere Application Server Liberty 20.0.0.1
20.0.0.2: WebSphere Application Server Liberty 20.0.0.2
8.5.5.17: WebSphere Application Server V8.5.5 Fix Pack 17
9.0.5.3: WebSphere Application Server traditional Version 9.0.5 Fix Pack 3
20.0.0.3: WebSphere Application Server Liberty 20.0.0.3
20.0.0.4: WebSphere Application Server Liberty 20.0.0.4
20.0.0.5: WebSphere Application Server Liberty 20.0.0.5

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You can track all active APARs for this component.

 

APAR status

  • Closed as program error.

Error description

  • The following block in the OpenJPA's
    ConfigurationImpl.loadGlobals() method contains:
    
    // let system properties override other globals
    try {
    fromProperties(new HashMap(
    AccessController.doPrivileged(
    J2DoPrivHelper.getPropertiesAction())));
    
    This retrieves a Properties object from
    System.getProperties(), which is passed to HashMap's ctor.
    The ctor interacts with an enumerator associated with the
    Properties object to populate the new HashMap instance.
    However, if another thread mutates the JVM's System
    Properties, it can result in a
    ConcurrentModificationException as observed below:
    
    Caused by: java.util.ConcurrentModificationException
    at java.util.Hashtable$Enumerator.next(Hashtable.java:1256)
    at java.util.HashMap.putAllForCreate(HashMap.java:566)
    at java.util.HashMap.<init>(HashMap.java:310)
    at
    org.apache.openjpa.lib.conf.ConfigurationImpl.loadGlobals(Co
    nfigurationImpl.java:189)
    

Local fix

Problem summary

  • ****************************************************************
    * USERS AFFECTED:  All users of IBM WebSphere Application      *
    *                  Server Liberty and traditional V8.5.5 and   *
    *                  V9.0.0  - Java Persistence API (JPA)        *
    ****************************************************************
    * PROBLEM DESCRIPTION: OpenJPA's                               *
    *                      ConfigurationImpl.loadGlobals() has     *
    *                      java.util.ConcurrentModificationExcepti *
    *                      on                                      *
    ****************************************************************
    * RECOMMENDATION:                                              *
    ****************************************************************
    The following block in the OpenJPA's
    ConfigurationImpl.loadGlobals() method contains:
    
    // let system properties override other globals
    try {
    fromProperties(new HashMap(
    AccessController.doPrivileged(
    J2DoPrivHelper.getPropertiesAction())));
    
    This retrieves a Properties object from System.getProperties(),
    which is passed to HashMap's ctor. The ctor interacts with an
    enumerator associated with the Properties object to populate the
    new HashMap instance. However, if another thread mutates the
    JVM's System Properties, it can result in a
    ConcurrentModificationException as observed below:
    
    Caused by: java.util.ConcurrentModificationException
    at java.util.Hashtable$Enumerator.next(Hashtable.java:1256)
    at java.util.HashMap.putAllForCreate(HashMap.java:566)
    at java.util.HashMap.<init>(HashMap.java:310)
    at
    org.apache.openjpa.lib.conf.ConfigurationImpl.loadGlobals(Config
    urationImpl.java:189)
    

Problem conclusion

  • With this fix, code has been added to OpenJPA to ensure that
    method ConfigurationImpl.loadGlobals() is property synchronized
    to avoid potential concurrent modifications.
    
    The fix for this APAR is currently targeted for inclusion in
    Service Levels (Fix Packs) 8.5.5.12 and 9.0.0.3 of WebSphere
    Application Server versions 8.5.5 and 9.0.0, and fix pack
    17.0.0.1 for WebSphere Application Server Liberty.  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

    PI70841

  • Reported component name

    LIBERTY PROFILE

  • Reported component ID

    5724J0814

  • Reported release

    855

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt / Xsystem

  • Submitted date

    2016-10-18

  • Closed date

    2016-10-20

  • Last modified date

    2016-10-20

  • 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

    LIBERTY PROFILE

  • Fixed component ID

    5724J0814

Applicable component levels

  • R855 PSY

       UP

[{"Business Unit":{"code":"BU053","label":"Cloud & Data Platform"},"Product":{"code":"SSEQTP","label":"WebSphere Application Server"},"Platform":[{"code":"PF025","label":"Platform Independent"}],"Version":"855","Line of Business":{"code":"LOB36","label":"IBM Automation"}}]

Document Information

Modified date:
17 June 2020