CSS Retry Strategy
Summary
There is currently a mismatch within the Central Switching Service (CSS) system functionality and the legal text within the REC Switching Data Management Schedule. Within the schedule the retry strategy is defined as “retry sending the Market Message at intervals of 10 seconds, 20 seconds and 30 seconds from each attempt to send the Market Message. If these retry Market Messages also fail, then the Market Message shall be retried at intervals of one hour up to a maximum of 12 hours; after which delivery of the Market Message shall be abandoned and a Switching Incident raised in accordance with the Switching Service Management Schedule”. However, in response to an incident in 2022, the CSS Provider updated the retry strategy. This change seeks to amend the legal text in Section 2.4 of the Switching Data Management Schedule to reflect the retry strategy which is currently in operation in the CSS system.
Latest update and next planned activity
Date of latest update
Latest Update
08/11/2024 - This Change Proposal has been implemented as part of the November 2024 REC Release.
Impacts Overview
Priority and rationale
Standard
Priority last updated on 29 May 2026
Solution development
Problem Statement
The CSS system is currently out of sync with the REC legal drafting for the retry strategy.
Proposed solution summary
- The Switching Data Management Schedule Section 2.4 should be updated to reflect the current retry strategy: 1. a short interval retry sequence of 3 attempts at 20 second intervals 2. a long interval retry sequence of 12 attempts at 1 hour intervals. The CSS Provider has confirmed that there is now a process in place that would prevent any future updates to the retry strategy without a change request being raised in the first instance.
No documents available.
Change Plan
Change Proposal Plan
Completed
Start:
15 Aug 2024Due:
17 Sep 2024Completion:
17 Sep 2024Consultation to be issued
Completed
Start:
17 Sep 2024Due:
20 Sep 2024Completion:
20 Sep 2024Consultation to close
Completed
Start:
20 Sep 2024Due:
04 Oct 2024Completion:
04 Oct 2024Final Recommendation Vote
Completed
Start:
04 Oct 2024Due:
15 Oct 2024Completion:
15 Oct 2024Original submission
Change details
- - -
15 Aug 2024
Change details
CSS Retry Strategy
-
-
-
-
Impacts
No details provided
No details provided
-
No details provided
-
No details provided
-
No details provided
-
No details provided
-
No details provided
-
No details provided
-
No details provided
-
No details provided
-
-
No details provided
Priority & timing
No
-
-
-
No details provided
-