SentinelConnect - Primary check not working when user isn't allowed to execute ROLE

[fsu-debug]

Hi,

I'm trying to use StackExchange.Redis to connect to a Valkey instance via Sentinel. Our organization doesn't allow the user to run the ROLE command, leading to the following line to result in an exception:

StackExchange.Redis/src/StackExchange.Redis/ConnectionMultiplexer.Sentinel.cs

Line 236 in ae6419a

if (connection.GetServer(newPrimaryEndPoint)?.Role()?.Value == RedisLiterals.master)

There was an issue in 2023 where a change for this was suggested by @NickCraver: #2461

if (connection.GetServer(newPrimaryEndPoint)?.IsReplica == false)

I tested this change with my configuration and it worked pretty well.

Is there any chance in adding this change after all this time? I would have opened a PR but don't want to take credit for something I didn't come up with.

[mgravell]

Ok, IMO we should issue both a ROLE and an INFO REPLICATION, let them complete (or not), and capture the data in a non-fatal way. Similar, but hopefully with broader scope. Good report, will do.