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Redis Sentinel: Command cannot be issued to a slave: ROLE #2876
Description
Hey we've set up redis sentinel but connecting with stackexchange.redis getting a ROLE command sent to a slave inside GetSentinelMasterConnection.
I'm sure this is something we've messed up, it's been tricky to get set up - any chance of help? <3
ERROR Hangfire.Pro.Redis.RedisStorage [(null)] - Couldn't connect to Redis server(s) 'redis-sentinel-0.redis-sentinel-svc.gnigats.svc.cluster.local:26379,redis-sentinel-1.redis-sentinel-svc.gnigats.svc.cluster.local:26379,redis-sentinel-2.redis-sentinel-svc.gnigats.svc.cluster.local:26379', will reconnect in 00:00:30
StackExchange.Redis.RedisCommandException: Command cannot be issued to a slave: ROLE
at StackExchange.Redis.ConnectionMultiplexer.TryPushMessageToBridge[T](Message message, ResultProcessor`1 processor, ResultBox`1 resultBox, ServerEndPoint& server) in C:\projects\stackexchange-redis\StackExchange.Redis\StackExchange\Redis\ConnectionMultiplexer.cs:line 1934
at StackExchange.Redis.ConnectionMultiplexer.ExecuteSyncImpl[T](Message message, ResultProcessor`1 processor, ServerEndPoint server) in C:\projects\stackexchange-redis\StackExchange.Redis\StackExchange\Redis\ConnectionMultiplexer.cs:line 2196
at StackExchange.Redis.RedisServer.Role(CommandFlags flags) in C:\projects\stackexchange-redis\StackExchange.Redis\StackExchange\Redis\RedisServer.cs:line 326
at StackExchange.Redis.ConnectionMultiplexer.GetSentinelMasterConnection(ConfigurationOptions config, Action`1 log) in C:\projects\stackexchange-redis\StackExchange.Redis\StackExchange\Redis\ConnectionMultiplexer.Sentinel.cs:line 210
at Hangfire.Pro.Redis.RedisStorage.CreateMultiplexer(EventWaitHandle reconnectEvent)
at Hangfire.Pro.Redis.RedisStorage.ConnectLoop() in C:\projects\hangfire-pro-redis\src\Hangfire.Pro.Redis\RedisStorage.cs:line 508
Activity
NickCraver commentedon Apr 29, 2025
What version of StackExchange.Redis are you using here? Based on terminology, we'd assume it's quite old - does this repro on latest?
qmosselm commentedon Feb 16, 2026
Hi @dave-yotta, I got the same issue with Hangfire.Pro.Redis.
Were you able to find a solution ? It seems they are using the 1.2.7 build binaries of StackExchange.Redis in the last version of Hangfire.Pro.Redis.
mgravell commentedon May 22, 2026
I suspect this will be indirectly fixed by #3088
mgravell commentedon Jul 22, 2026
Addressed in StackExchange.Redis 2.13.17 (#3088): the sentinel primary-verification path now wraps
server.Role()in try/catch with a!server.IsReplicafallback, so 'Command cannot be issued to a slave: ROLE' can no longer propagate from there. Closing as completed.If you still hit this on a current build, please comment and we'll reopen (stale replica-state may still cause a retry delay).