The defect will cause data loss on certain CMDB tables and is considered a severe impact problem.
In limited situations, it is also possible to lose changes made to records on these tables while the upgrade is running.
Instances with more than 2 million records in the CMDB tables have experienced extended upgrade durations of at least 30 minutes.
A large percentage of the active requests will probably be Presence transactions.
Requests will return 429 errors (Too Many Requests) if they encounter a filled semaphore queue.
In situations where the hr_task or hr_case table is created as Table per Class prior to the upgrade and when the table is altered during the upgrade, a table conversion takes place that results in data loss.
According to the Geneva release notes: "In addition, the [hr_change] table is merged with the [hr_case] during the upgrade.
This is caused by a defect in the upgrade script that fails to apply customizations that existed before the upgrade.
Service Now has identified an issue affecting customers with an Oracle database who upgrade to Geneva Patch 3 or later.
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