[MB-23798] XDCR Service automatically deletes replications if Target Bucket is removed

Product: Couchbase Server
Component: XDCR
Issue Link: MB-23798
Affects Versions: 4.x, 5.x, 7.2.x, 7.6.x
Fix Versions: 7.2.7, 7.6.6, 8.0.0

Summary

• When the destination bucket of an active XDCR replication is deleted, the XDCR service will automatically remove the replication after a short period of time.

Symptoms 

• A replication is removed without any user action to delete it.
• The destination bucket was deleted shortly before the replication disappeared.
• The log tab displays the message:
  “Replication from bucket A to bucket B on cluster X removed, since Bucket B has been missing for Y times.”

Triggers

• Deletion of the destination bucket for an active XDCR replication triggers the replication removal.

Verification

• The log tab includes the message: “Replication from bucket A to bucket B on cluster X removed, since Bucket B has been missing for Y times.”
• The destination bucket for the affected replication has been deleted.

Workarounds

• No workaround is available. To resume replication, recreate the destination bucket and the replication, or create a new replication targeting another bucket.