Sentinel connection error when using the highIntegrity = true configuration

[pvthang00]

I am using Redis with the sentinel model.
Environment information:

Redis version: 7.0.5
StackExchange.Redis version: 2.8.58
My connection string configuration is as follows:
“10.0.0.1:26379,10.0.0.2:26379,10.0.0.3:26379,serviceName=mycluster,abortConnect=false,highIntegrity=true”

I encountered the following error:

StackExchange.Redis.RedisConnectionException: Sentinel: The ConnectionMultiplexer is not a Sentinel connection. Detected as: Standalone
   at StackExchange.Redis.ConnectionMultiplexer.GetSentinelMasterConnection(ConfigurationOptions config, TextWriter log) in /_/src/StackExchange.Redis/ConnectionMultiplexer.Sentinel.cs:line 173
   at StackExchange.Redis.ConnectionMultiplexer.SentinelPrimaryConnectAsync(ConfigurationOptions configuration, TextWriter writer) in /_/src/StackExchange.Redis/ConnectionMultiplexer.Sentinel.cs:line 157
   at Microsoft.Extensions.Caching.StackExchangeRedis.RedisCache.ConnectSlowAsync(CancellationToken token)
   at Microsoft.Extensions.Caching.StackExchangeRedis.RedisCache.GetAndRefreshAsync(String key, Boolean getData, CancellationToken token)
   at Microsoft.Extensions.Caching.StackExchangeRedis.RedisCache.GetAsync(String key, CancellationToken token)
   at Microsoft.Extensions.Caching.Distributed.DistributedCacheExtensions.GetStringAsync(IDistributedCache cache, String key, CancellationToken token)

Before setting highIntegrity=true, I did not encounter this error.

Please help me find the root cause of the error.
Thank you!

[mgravell]

I think this is most-likely the same thing as #2980, with different causality; looking

[pvthang00]

I think this is most-likely the same thing as #2980, with different causality; looking

I have debugged and identified 2 issues here:

1. When configuring highIntegrity=true, messages are validated using HighIntegrity, including messages with command=SENTINEL. These command=SENTINEL messages always fail at this validation step.
   I tried an alternative connection method so that command=SENTINEL messages would not be validated, and the result was successful.

//...
opts.HighIntegrity = false;
var sentinelConnection = await ConnectionMultiplexer.SentinelConnectAsync(opts, logWriter);
opts.HighIntegrity = true;
var multiplexer = sentinelConnection.GetSentinelMasterConnection(opts, logWriter);

instead of

//...
opts.HighIntegrity = true;
var multiplexer = await ConnectionMultiplexer.ConnectAsync(opts, logWriter);

I really want to use highIntegrity=true in combination with a Sentinel-type connection. However, I believe this is not a standard connection approach, so I am not applying it to my project.

2. Regarding the error message:
   StackExchange.Redis.RedisConnectionException: Sentinel: The ConnectionMultiplexer is not a Sentinel connection. Detected as: Standalone
   I think this error message is not very helpful. It should provide a more accurate description of the actual error.

I hope this information will be useful. Thank you!