Backup failed due to rollback

[fabiosst]

Hi everyone,

I have deployed the Couchbase operator helm chart on Kubernetes.
The backup pods were running correctly, but the incremental pod started to fail due to a rollback error.
It seems related always to the same vBucket, but I don’t know how to solve this.
Here it is the error:

(Cmd) Error backing up cluster: failed to execute cluster operations: failed to execute bucket operation for bucket ‘<bucket_name>’: failed to transfer bucket data for bucket ‘<bucket_name>’: failed to transfer key value data: failed to transfer key value data: failed to open stream: failed to stream vBucket 56: client received rollback, either purge this backup or create a new backup repository. See the ROLLBACK section in the backup documentation for more information

NOTE: The full backup works fine. Only the incremental is getting this error.

Any solution?

[mreiche]

What version of couchbase server do you have? If you have 7.1.0 or earlier, please upgrade to the latest. There is a fix in 7.1.1 for an issue that sounds like yours.

https://issues.couchbase.com/browse/MB-52011

[fabiosst]

Thanks for the response.

I’m running Couchbase Server EE 7.0.3.
Today i got confirmation that there’s an application team performing some kind of test on the bucket and probably doing some rollback on the documents/bucket.
This could be the cause of the error, but an investigation is needed.

[mreiche]

Pretty sure that MB-52011 is the cause of your issue.