This document serves as a Root Cause Analysis for the Alma service interruption experienced by Ex Libris customers on March 18, 2018
The goal of this document is to share our findings regarding the event, specify the root cause analysis, outline actions to be taken to solve the downtime event, as well as preventive measures Ex Libris is taking to avoid similar cases in future.
Intermediate service interruptions were experienced by Ex Libris customers served by the Alma EU02 instance at our European Data Center during the following time period:
March 18th, 2018 from 1:39 PM until 2:28 PM Amsterdam time.
During the event, the service was unavailable for the environment.
Root Cause Analysis
Ex Libris Engineers investigated this event to determine the root cause analysis with the following results:
An issue related to the timing and orchestration of system processes resulted in an incorrect overlap of system and database proceses which accumulated into a growing load on the system and the database, which eventually caused the instance to slowdown and become unavailable.
Technical Action Items and Preventive Measures
Ex Libris has taken the following action and preventive measures to avoid such an occurrence in future:
- Cloud process procedures were updated to prevent this issue from re-occuring by improving the timing and orchestration of the system and database processes.
ExLibris is committed to providing customers with prompt and ongoing updates during Cloud events. Ongoing and prompt updates on service interruptions appear in the system status portal at this address: http://status.exlibrisgroup.com/
These updates are automatically sent as emails to registered customers.
|March 27, 2018||Initial Publication|