m90 commented on issue #2369: Cluster to single node replication prints "Could not parse cookie from response headers cookie_format_invalid" URL: https://github.com/apache/couchdb/issues/2369#issuecomment-574571904 I digged into the issue further in our setup ad it's starting to get very mysterious: - removing the nginx proxy from our setup didn't make any difference - cookie headers are not mangled in any way, everything looks as expected --- Now to the weird part: I removed all of the replications (we replicate around 10 databases to their backups, authentication is done using BasicAuth) we have and then re-enabled them one by one. Doing this I found out the error occurs on a single database only. Let's call it the dubious database for now. Important to know is that __replication to the remote target works just fine for this database__. If I replicate this dubious database to a different, still empty remote database, the error message will show up again. If I replicate the dubious database to a new local database and then replicate this copy to the remote, the error message does not show up. This makes me think the cause of this is bound to the database itself, but then again, it doesn't make much sense considering how that error might show up. Some more things I found out about the dubious database: - The database's `_security` doc looks ok. - It has a very high number of deleted docs compared to the other databases - when I GET /dbs I can see that the database's revision number is unusually high compared to the other databases I'm sorry if this does not make any sense at all (at least to me), but maybe one of you can make sense of this. Let me know if I can supply some additional info about the dubious database.
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