Cbbackup failing due to large meta.rev value

Couchbase Server
1

Running 6.5 CE (ubuntu 18)

cbbackup throws this error:
"OverflowError: int too big to convert" by rev_seqno.to_bytes(4, 'big') at line 413 in File "/opt/couchbase/lib/python/pump_dcp.py".

It is failing for all documents that have a large meta.rev number.

Here is the meta of one of the document for which cbbackup is failing:

{
  "meta": {
    "id": "<snip>",
    "rev": "211362657848-159245ef377b00000000000002000000",
    "expiration": 0,
    "flags": 33554432,
    "type": "json"
  },
  "xattrs": {}
}

The same backup works fine in version 4 database. I am upgrading to 6.5 CE and backup stopped working due to the above error. For the time being I am using a v4 instance to take the remote backup of a v6.5 instance.

Why is the meta.rev value so high? It is not a heavily used database with just a single node and few thousands of documents. How do I make cbbackup work?

Thanks.

2

Welcome to the community! Your issue looks remarkably similar to my post. Could you kindly post there that you run into the same issue. That’d be great!

3

Hello @Nik

Thank you for bring this issue to our attention and for opening a new post. It’s much better to open a new post rather than reuse an old one.

I have opened MB-38683 . The issue is that cbbackup is converting the Rev field to 4 bytes when it should be convert to 8 bytes.

4

Hello @pvarley

I checked out the changes in MB-38683 and replaced pump_dcp.py. cbbackup now completes! Thanks!

2 Likes
5

Hi There,

Still, I am facing the same kind of issue with Community Edition 6.6.0 build 7909.
Anyone, please assist me with how can we fix this issue?

Here are more details