IC88062: GLOBAL CACHE CAN LOSE DATA WHEN MACHINE FAILS IN ACTIVE/ACTIVE HA

Subscribe

You can track all active APARs for this component.

APAR status

  • Closed as program error.

Error description

  • Global Cache allows its WebSphere eXtreme Scale components to
    place the primary and replica shard for a piece of data on the
    same physical host, leading to loss of this data if that host
    fails. It should instruct the WXS components to place the
    primary and replica on different hosts if it detects that the
    cache topology has more than one catalog server, on more than
    one host.
    

Local fix

  • n/a
    

Problem summary

  • ****************************************************************
    USERS AFFECTED:
    All users of WebSphere Message Broker V8.0.0.1 using the
    Global Cache feature.
    
    
    Platforms affected:
    z/OS, MultiPlatform
    
    ****************************************************************
    PROBLEM SUMMARY:
    If a set of brokers or execution groups are configured to
    share data using the Global Cache feature (introduced in
    8.0.0.1) across multiple systems, then data loss can occur if
    a primary shard and corresponding secondary shard are located on
    the same system, and that system goes down. The Global Cache
    functionality should place the secondary shard on another
    system, so that the data continues to be available even if the
    system hosting the primary shard goes down.
    

Problem conclusion

  • WebSphere Message Broker has been modified to correctly place
    the secondary shard on a different system to the primary shard
    when the Global Cache is being used to share data across
    multiple systems.
    
    ---------------------------------------------------------------
    The fix is targeted for delivery in the following PTFs:
    
    Platform           v8.0
    --------           --------------------
    Multiplatforms     8.0.0.2
    
    The latest available maintenance can be obtained from
    'WebSphere Message Broker Recommended Fixes'
    http://www.ibm.com/support/docview.wss?rs=849&uid=swg27006041
    
    If the maintenance level is not yet available, information on
    its planned availability can be found in 'WebSphere Message
    Broker Planned Maintenance Release Dates'
    http://www-1.ibm.com/support/docview.wss?rs=849&uid=swg27006308
    ---------------------------------------------------------------
    

Temporary fix

Comments

APAR Information

  • APAR number

    IC88062

  • Reported component name

    WEB MESSAGE BRO

  • Reported component ID

    5724J0520

  • Reported release

    800

  • Status

    CLOSED PER

  • PE

    NoPE

  • HIPER

    NoHIPER

  • Special Attention

    NoSpecatt

  • Submitted date

    2012-11-08

  • Closed date

    2012-11-27

  • Last modified date

    2012-11-27

  • 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

    WEB MESSAGE BRO

  • Fixed component ID

    5724J0520

Applicable component levels

  • R800 PSY

       UP



Rate this page:

(0 users)Average rating

Document information


More support for:

WebSphere Message Broker

Software version:

8.0

Reference #:

IC88062

Modified date:

2012-11-27

Translate my page

Machine Translation

Content navigation