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We're facing some problems with using Ktor in AWS Fargate behind a load balancer. We want HTTP/2 as the application protocol, but we're getting a Netty exception that looks strange:
```2025-05-09 07:18:11.727 [eventLoopGroupProxy-4-1] TRACE io.ktor.server.Application - Failed to decode request
java.lang.IllegalArgumentException: text is empty (possibly HTTP/0.9)```
Has anyone seen this and know what we're doing wrong?

So it seems this happens because we haven't configured a SSL certificate for our Ktor app. Since we're running behind a load balancer that terminates the SSL stuff with the client, we don't want to use it for the ktor instance.

Is it possible to enable HTTP/2 in ktor without SSL?

I don't think it's possible yet. Can vote up for this issue here:
<https://youtrack.jetbrains.com/issue/KTOR-4750/Support-for-server-side-http2-without-tls-h2c>

we turned off http2 with fargate a few years ago due to similar issues