Hei We are using CIO engine for our httpclient And often we

Question

Hei We are using CIO engine for our httpclient And often we see this error right request has been made We noticed that the request never reaches the server and dies with the following error while sending Do you know what is happening and how we can find more about whats causing it Version we use for ktor CIO is 1 6 8 ```java io EOFException Invalid chunk content block of size 8192 ended unexpectedly at io ktor http cio ChunkedTransferEncodingKt decodeChunked ChunkedTransferEncoding kt 92 at io ktor http cio ChunkedTransferEncodingKt$decodeChunked$3 invokeSuspend ChunkedTransferEncoding kt at kotlin coroutines jvm internal BaseContinuationImpl resumeWith ContinuationImpl kt 33 at kotlinx coroutines internal DispatchedContinuation resumeWith DispatchedContinuation kt 205 at io ktor utils io ByteBufferChannel resumeWriteOp ByteBufferChannel kt 2191 at io ktor utils io ByteBufferChannel bytesRead ByteBufferChannel kt 908 at io ktor utils io ByteBufferChannel readAsMuchAsPossible ByteBufferChannel kt 533 at io ktor utils io ByteBufferChannel readAsMuchAsPossible$default ByteBufferChannel kt 514 at io ktor utils io ByteBufferChannel readRemainingSuspend ByteBufferChannel kt 2154 at io ktor utils io ByteBufferChannel readRemaining$suspendImpl ByteBufferChannel kt 2128 at io ktor utils io ByteBufferChannel readRemaining ByteBufferChannel kt at io ktor utils io ByteReadChannelKt readRemaining ByteReadChannel kt 212 at io ktor util ByteChannelsKt$split$1 invokeSuspend ByteChannels kt 25 at kotlin coroutines jvm internal BaseContinuationImpl resumeWith ContinuationImpl kt 33 at kotlinx coroutines DispatchedTask run DispatchedTask kt 106 at kotlinx coroutines scheduling CoroutineScheduler runSafely CoroutineScheduler kt 571 at kotlinx coroutines scheduling CoroutineScheduler$Worker executeTask CoroutineScheduler kt 750 at kotlinx coroutines scheduling CoroutineScheduler$Worker runWorker CoroutineScheduler kt 678 at kotlinx coroutines scheduling CoroutineScheduler$Worker run CoroutineScheduler kt 665 ```

Satyam Agarwal · Answer

cc < Aleksei Tirman JB >

Aleksei Tirman [JB] · Answer

Seems like some problem occurs while parsing a response body It s really weird that a request never reaches a server

Satyam Agarwal · Answer

Is there something I can go on with to debug the issue

Aleksei Tirman [JB] · Answer

You can use a protocol analyzer like WireShark to capture a request response and then share it with us

Satyam Agarwal · Answer

hmm this could be hard to do as this happens only one api and sporadically All the other applications I have use the same http client engine and configurations They have never faced this problem Neither have I been able to reproduce it And the issue is in our production environment where capturing request response in such a way is expensive when we don t know when it will occur