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Alert: Data Integrity Problem in Dejournaling

May 20, 2014 - Alert: Data Integrity Problem in Dejournaling

InterSystems has corrected several defects that can only occur in rare circumstances but can impact data integrity.

The defects are present in Caché, Ensemble, and HealthShare from version 2012.2.0 through 2013.1.4, on all platforms and operating systems.

These defects can, in rare circumstances, lead to data inconsistency or database corruption when data from journal files is applied to a database. This impacts systems that are the destination of replication via shadowing or mirroring, or databases being restored from journals. The risk to journal recovery following a system crash is believed to be negligible, and transaction rollback is not affected.

InterSystems recommends upgrading systems to a product version that includes the corrections listed below.
The corrections for these defects are HYY1881, HYY1902, and HYY1904. They are included in Caché, Ensemble, and HealthShare as of 2013.1.5 and 2014.1.0, and are also available via Ad Hoc distribution from InterSystems Worldwide Response Center (WRC). If you have any questions regarding this advisory, please contact the Worldwide Response Center.



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