Infinite Loop in SQL Server Merge Replication When Using Delete + Insert for Detail Records
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I have a typical master-detail table relationship (e.g., Orders and OrderDetails).
My application updates the detail records by:
1. Deleting all existing detail records for a given master record.
2. Inserting the new detail records.
This update pattern is used because it's easier to replace all details than track row-level changes.
I want that the subscriber can update the record in the publisher too. It's why I am using Merge Replication.
The Problem:\
Once Merge Replication is enabled:
The DELETE + INSERT operations at the Publisher get replicated to the Subscriber.
The Subscriber, having already synced the previous detail set, treats this as a conflict or change, and re-applies its own version.
The replication engine then thinks the Publisher has changed again and pushes the data back.
This cycle continues infinitely, causing either:
Endless insertions of the same data, or
Continuous merge conflict resolution.
The only way to stop it is to delete the subscription, which is not sustainable.
Questions:
Is this an expected behavior in Merge Replication when using Delete-Insert update logic?
Is there a recommended best practice for updating detail records in Merge Replication scenarios to avoid this loop?
Would using UPDATE statements instead of DELETE + INSERT be a reliable workaround?
Are there settings (e.g., conflict resolution rules, rowguid column issues, or tracking settings) that can help avoid this behavior?
Environment:
SQL Server 2017
Merge Replication with bi-directional sync (Publisher Subscriber)
Replicated tables have rowguid and conflict tracking enabled
Asked by Filbert Umbawa
(1 rep)
Jun 12, 2025, 02:26 AM
Last activity: Jun 12, 2025, 04:31 AM
Last activity: Jun 12, 2025, 04:31 AM