PM64371: In a multimaster replication environment, data might be corrupted.

Download WebSphere eXtreme Scale Version 8.5 Fix Pack 1 server upgrade

APAR status

• Closed as program error.

Error description

• A primary in one domain can send back data to a primary in a
  second domain that it has already applied.  This scenario was
  not handled correctly, which can result in old data overwriting
  more recent data or entries being removed that should still
  exist.
  

Local fix

Problem summary

• ****************************************************************
  * USERS AFFECTED:  Users of WebSphere eXtreme Scale who are    *
  *                  using multimaster replication in an         *
  *                  environment with multiple domains.          *
  ****************************************************************
  * PROBLEM DESCRIPTION: In a multimaster replication            *
  *                      topology, a timing window exists        *
  *                      where data can become mismatched        *
  *                      between domains.                        *
  ****************************************************************
  * RECOMMENDATION:                                              *
  ****************************************************************
  A problem was fixed so that a domain can send back changes to
  the domain that made the changes.  With three or more domains,
  where that entry might have changed already, the original
  change might be re-applied, which causes the data to be
  outdated or erroneously removed.
  

Problem conclusion

• The fix for this APAR is available in WebSphere eXtreme Scale
  Version 8.5. Fix Pack 1 and later releases.
  

Temporary fix

Comments

APAR Information

• 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

  WS EXTREME SCAL

• Fixed component ID

  5724X6702

Applicable component levels

• R850 PSY

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