February 25, 2016 – Alert: Incorrect SQL Results
InterSystems has corrected a defect that can cause incorrect results for certain SQL INSERT, UPDATE, and DELETE statements.
This defect is present only in Caché and Ensemble 2015.2 and HealthShare distributions based on them. The problem affects all platforms.
Incorrect results occur only when two or more of these statements are nested within each other.
The example below demonstrates one possible way for this problem to happen:
InterSystems has corrected a defect that may result in missing updates when utilizing Caché online backup.
This defect is present in all Caché and Ensemble versions 2015.1.x, 2015.2.x and 2016.1.x, and all HealthShare distributions based on those versions. It affects all platforms and operating systems except backups of OpenVMS cluster databases.
July 27, 2017 – Alert: Linux Defects Can Corrupt Mirror Copies of Journal Files
InterSystems has encountered defects in Linux which can corrupt copies of journal files that are generated on a mirror backup or async member; this occurs only in certain specific configurations. The original mirror journal file created on the primary member is not affected.
July 6th, 2016
InterSystems has corrected a defect with Mirroring that can impact data integrity
The defect is present in all released versions Caché, Ensemble, and HealthShare beginning with 2015.2.0. It is present for all platforms and affects both failover and asynchronous mirroring configurations.
InterSystems has corrected a memory leak in applications that pass by reference to a formal parameter that accepts a variable number of arguments.
InterSystems has corrected a defect in applications that use Unicode character 223 (ß). This defect can result in incomplete query results, class compilation errors, and removal of custom SQL privileges.
This problem occurs on systems that are running or have previously run on:
The defect is triggered by data and component names containing Unicode character 223 (ß). In the versions listed above, an uppercase conversion incorrectly maps that character to Unicode character 7838 (ẞ). Applications perform this uppercase conversion using features such as $ZCONVERT and %SQLUPPER.
Problems can occur when accessing data or classes created or modified on a product with a different uppercase conversion than the one currently in use.
InterSystems has corrected several critical defects that can result in data integrity issues. These defects were identified and corrected within a short time, so InterSystems has simplified the upgrade process by consolidating them into a single package. The effects of encountering these defects may not always be visible.
August 24, 2016 – Alert: Database Compaction
This is an addendum to the Alert published on October 14, 2015 – Alert: Database Defragmentation.
That alert indicated that the database defragmentation utility in 2014.1 and higher, on all platforms except OpenVMS, could cause database degradation and the correction JO2871 is available to clients upon request and would be included in future releases. The correction was included in 2015.1.3, 2015.2.2 and 2016.1.
InterSystems has corrected a defect that can cause database degradation in extremely rare circumstances. Associated problems may include, but are not limited to, incorrect or missing application data and system hangs.
June 26, 2017 – Alert: Data Corruption with Mixed Endian Mirror Shadowing
InterSystems has corrected a defect that may result in corruption of Unicode data on a shadow system whose source is an async mirror member.
This defect affects all currently released Caché, Ensemble, and HealthShare distributions beginning with version 2012.2.0. All platforms and operating systems are affected.
InterSystems has corrected a defect that can result in data integrity problems in environments that use InterSystems mirroring in conjunction with parallel dejournaling. This problem exists for currently released Caché and Ensemble versions beginning with 2017.2 and for InterSystems IRIS Data Platform version 2018.1.
InterSystems has corrected a defect that could lead to invalid backups on Windows platforms. The defect causes upgrades to disable the EnableVSSBackup setting. By default, EnableVSSBackup is enabled (value set to 1) and the upgrade sets its value to 0. Windows VSS backups taken with this setting disabled may contain invalid CACHE.DAT files.
This problem is limited to Windows platforms on the following versions:
The defect only occurs if you are upgrading to a version listed above. Once you have upgraded to an affected version, you must manually enable the setting; otherwise, it will be disabled on future upgrades, even when upgrading to versions containing the correction.
For customers using Windows VSS backups, InterSystems recommends enabling this setting on any 2018.1 instances of Caché or Ensemble. Once you have enabled the setting, future upgrades (including to affected versions) will preserve its value.
