User account collisions

Each user account you create in an HCP system has an internal ID that uniquely identifies that user account. As a result, two user accounts created on different systems are different from each other, even if they have the same username and are defined for the same HCP tenant.

A user account collision occurs when the Replication service tries to replicate a user account from one system to another system that already has a different user account with the same username, where both user accounts are defined for the same tenant.

To recover from a user account collision, take one of these actions:

  • Change the username for the user account on either of the systems involved in the link.
  • Delete the user account on either of the systems involved in the link.

Here’s a scenario that shows how a user account collision can cause the Replication service to pause replication of a tenant. In this scenario:

  • System A and system B replicate to each other over active/active link AB.
  • Link AB includes tenant T1, so T1 exists on both systems.

These events occur in the order shown:

  1. On system A, you create a user account with username U1 for T1.
  2. Before U1 is replicated to system B, you create a user account with username U1 for T1 on system B.
  3. The Replication service tries to replicate U1 to system B. The replication is unsuccessful because a different user account with username U1 already exists on system B. As a result, the service automatically pauses replication of T1 on link AB.