Mar 24, 2026
Eurex
Eurex Readiness Newsflash | Incident Handling: Matching Engine and Gateway Failover Failure
While our constant effort is to keep the usual high availability rate of the T7 trading system for the Eurex Markets, we want to support our Trading Participants to be prepared as best as possible for the rarely occurring incident cases. Therefore, we publish Newsflash messages on a regular basis to explain handling of various special incident cases or provide more general incident handling information.
1. Background information
When a combined PS Gateway/Matcher process is in place, the failure of the PS Gateway implies the simultaneous failure of the Matching Engine and vice versa.
To achieve the necessary throughput and latency requirements, the T7 combined PS Gateway/Matching Engine handles all incoming orders and the state of the orders in non-persistent memory. The actions prior to a failure of the combined PS Gateway/Matching Engine may have triggered a preliminary acknowledgement to the Trading Participant but may not have been persisted.
A PS Gateway/Matching Engine failover is not transparent but always implies a Market Reset and that active sessions connected to that combined PS Gateway/Matching Engine will be disconnected. In case the primary PS Gateway/Matching Engine fails, the secondary component will take over by loading the persistent orders from the persistency layer and trading continues after a Market Reset - all non-persistent orders and quotes are deleted. After a timeout of 30 seconds (configurable) order maintenance will become available on the now active combined PS Gateway/Matching Engine.
2. Best Practice
If an active HF session is disconnected for any reason, the participant application should first try to reconnect to the same PS Gateway/Matching Engine. In case of a failed connection attempt, it should then try to connect to the backup PS Gateway/Matching Engine. The session login response (or reject) will inform about the status of the PS Gateway/Matcher process.
For more information on how to handle a matching engine and gateway failover and failure incidence, please see the following documents which are available on the Eurex website www.eurex.com:
- T7 Incident Handling Guide (Chapter 3.5)
under the following path: T7 Release 14.1 > System Documentation > Production
3. Focus Day in Simulation
A technical Focus Day scenario is provided in simulation environment to assist participants in testing the rare event of a matching engine failover followed by a partition failure.
For more details, please check the following documents:
under the path: T7 Release 14.1 > System Documentation > Simulation
under the path: Initiatives & Releases > Simulation calendar
With the next Focus Day on 14 April 2026, we encourage participants to test their processes during a Matching Engine Failover followed by a Partition Failure scenario in the simulation environment.
For more information on Deutsche Börse’s Disaster Recovery concept for the T7 trading system, please see the following document:
under the path: T7 Release 14.1 > System Documentation > Network Access
If you have any further questions or comments, please do not hesitate to contact Eurex Trading Operations via tel. +49-69-211-1 12 10 or eurextrading@eurex.com.
Kind regards,
Your Client Services Team
Further Information
Recipients: | All Trading Participants of Eurex Deutschland and Vendors | |
Target groups: | Front Office/Trading, Middle + Backoffice, IT/System Administration, Auditing/Security Coordination | |
Related Newsflash: | Eurex Newsflash from 11 September 2025: Emergency Communication Protocols and Best Practices | |
Contact: | Eurex Trading Operations, tel. +49-69-211-1 12 10, eurextrading@eurex.com | |
Web: | Support > Emergencies & safeguards Trade > Production Newsboard > Emergency Newsboard |
