Hi! Using ktor 1.5.2. I'm getting these Netty exceptions in the logs: ```java.lang.IllegalArgumentEx...

# ktor

[Jose A.]

Hi! Using ktor 1.5.2. I'm getting these Netty exceptions in the logs:

java.lang.IllegalArgumentException: text is empty (possibly HTTP/0.9)
at io.netty.handler.codec.http.HttpVersion.valueOf(HttpVersion.java:64)
at io.netty.handler.codec.http.HttpRequestDecoder.createMessage(HttpRequestDecoder.java:95)
at io.netty.handler.codec.http.HttpObjectDecoder.decode(HttpObjectDecoder.java:250)
...
2021-03-01 12:39:12.067 [eventLoopGroupProxy-4-31] TRACE Application - Failed to decode request
java.lang.IllegalArgumentException: invalid version format: D|¢Þ:À/ÀÀ'À0ÀÀ(/<5=AÀ+À À#À,À
at io.netty.handler.codec.http.HttpVersion.<init>(HttpVersion.java:120)
...
INFO Application - >>> REQUEST: Unhandled: GET - /templates <- I added these logs for debugging

The requests are made using Chrome (so it's not HTTP/0.9 for sure). It seems even I get the exceptions the requests are received. Any ideas?

[Rustam Siniukov]

Hi! Did you have it before 1.5.2?

[Jose A.]

I don't think so... but I'm getting these errors after a huge update to the service (upgrading many dependencies and server code). The errors are not showing in the tests.

[Jose A.]

Is there any way to log or debug netty requests to check if these exceptions are not being processed by ktor?

[Jose A.]

It seems our F5 (the load balancer) is making those TLS calls... So no ktor related problem... Sorry!