Hi there, a few questions:

• how are you trying to access redis - from what client?

• I see a public URL on redis - when was this added?

Hi, I have around 10 microservice accessing the Redis using internal URL and it was fine last 2 months

suddenly yesterday some server with new deployment (no redis side code change) suddenly throwing
[ioredis] Redis connection error: DNSException: syscall: "getaddrinfo", errno: 4, code: "ENOTFOUND"

so I try to change to public URL as a workaround and it work

eg. server deployed 18 hours ago -> connected to internal url and still working
server with new deploy (no matter manual trigger or github trigger, internal url not working and need to change the redis url to public

Do you have ?family=0 appended to each connection string?

no I don't, in code simply new Redis(process.env.REDIS_URL) (ioredis)
and env var it using railway variable for the connection string, and public works / private don't

[ioredis] Unhandled error event: undefined
[ioredis] Unhandled error event: undefined
[ioredis] Redis connection error: DNSException: syscall: "getaddrinfo", errno: 4, code: "ENOTFOUND"

also the service (server) without new deployment stay connect(eg. 3 days ago) thru private just fine
only the service have new deployment seems to have issue

Try ${{Redis.REDIS_URL}}?family=0

Thanks! this seems working but is there any reason it was working but now I need to add family=0?