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Throwing this tricky PHPRedis problem out to the fediverse: read error on connection to redis-cluster-01-nlb-prod.xyz.us-east-1.amazonaws.com:6379. Error code: 0.

I’m looking at library.c (https://github.com/phpredis/phpredis/blob/044b30386f0418e9ed2a2bbc3b79582520d008d8/library.c#L349) where the error is thrown but can’t see a specific cause in our code.

We’re terminating TLS at the NLB, and that’s only because we couldn’t find any other way to expose our Redis clusters to the other host we’re migrating off of.