Notes.md

So we have a server running on localhost:8080.

• Calling it with curl 'localhost:8080/foo/ping' works fine, and no timeouts are shown.
• If I open the page in Chrome however, I get the response fine, but after timeout-threshold (2 sec in this example) the logs get a lot of errors:
  • EDIT: If I use Chrome's Incognito mode; no timeouts errors then

[info] java.util.concurrent.TimeoutException: Timeout of 2 seconds triggered. Killing pipeline.
[info] 	at org.http4s.blaze.pipeline.stages.TimeoutStageBase$$anon$1.run(TimeoutStageBase.scala:29)
[info] 	at org.http4s.blaze.util.Execution$$anon$3.execute(Execution.scala:66)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Node.run(TickWheelExecutor.scala:261)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Bucket.checkNext$1(TickWheelExecutor.scala:193)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Bucket.prune(TickWheelExecutor.scala:200)
[info] 	at org.http4s.blaze.util.TickWheelExecutor.go$3(TickWheelExecutor.scala:153)
[info] 	at org.http4s.blaze.util.TickWheelExecutor.org$http4s$blaze$util$TickWheelExecutor$$cycle(TickWheelExecutor.scala:156)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$$anon$1.run(TickWheelExecutor.scala:55)
[info] 14:03:47.588 [blaze-selector-0-3] ERROR o.h.blaze.channel.nio1.NIO1HeadStage - Abnormal NIO1HeadStage termination
[info] java.util.concurrent.TimeoutException: Timeout of 2 seconds triggered. Killing pipeline.
[info] 	at org.http4s.blaze.pipeline.stages.TimeoutStageBase$$anon$1.run(TimeoutStageBase.scala:29)
[info] 	at org.http4s.blaze.util.Execution$$anon$3.execute(Execution.scala:66)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Node.run(TickWheelExecutor.scala:261)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Bucket.checkNext$1(TickWheelExecutor.scala:193)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Bucket.prune(TickWheelExecutor.scala:200)
[info] 	at org.http4s.blaze.util.TickWheelExecutor.go$3(TickWheelExecutor.scala:153)
[info] 	at org.http4s.blaze.util.TickWheelExecutor.org$http4s$blaze$util$TickWheelExecutor$$cycle(TickWheelExecutor.scala:156)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$$anon$1.run(TickWheelExecutor.scala:55)
[info] 14:03:47.589 [blaze-selector-0-4] ERROR o.h.s.blaze.Http1ServerStage$$anon$1 - Fatal Error: Error in requestLoop()
[info] java.util.concurrent.TimeoutException: Timeout of 2 seconds triggered. Killing pipeline.
[info] 	at org.http4s.blaze.pipeline.stages.TimeoutStageBase$$anon$1.run(TimeoutStageBase.scala:29)
[info] 	at org.http4s.blaze.util.Execution$$anon$3.execute(Execution.scala:66)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Node.run(TickWheelExecutor.scala:261)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Bucket.checkNext$1(TickWheelExecutor.scala:193)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Bucket.prune(TickWheelExecutor.scala:200)
[info] 	at org.http4s.blaze.util.TickWheelExecutor.go$3(TickWheelExecutor.scala:153)
[info] 	at org.http4s.blaze.util.TickWheelExecutor.org$http4s$blaze$util$TickWheelExecutor$$cycle(TickWheelExecutor.scala:156)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$$anon$1.run(TickWheelExecutor.scala:55)
[info] 14:03:47.589 [blaze-selector-0-3] ERROR o.h.s.blaze.Http1ServerStage$$anon$1 - Fatal Error: Error in requestLoop()
[info] java.util.concurrent.TimeoutException: Timeout of 2 seconds triggered. Killing pipeline.
[info] 	at org.http4s.blaze.pipeline.stages.TimeoutStageBase$$anon$1.run(TimeoutStageBase.scala:29)
[info] 	at org.http4s.blaze.util.Execution$$anon$3.execute(Execution.scala:66)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Node.run(TickWheelExecutor.scala:261)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Bucket.checkNext$1(TickWheelExecutor.scala:193)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Bucket.prune(TickWheelExecutor.scala:200)
[info] 	at org.http4s.blaze.util.TickWheelExecutor.go$3(TickWheelExecutor.scala:153)
[info] 	at org.http4s.blaze.util.TickWheelExecutor.org$http4s$blaze$util$TickWheelExecutor$$cycle(TickWheelExecutor.scala:156)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$$anon$1.run(TickWheelExecutor.scala:55)
[info] 14:03:47.589 [blaze-selector-0-3] ERROR o.h.blaze.channel.nio1.NIO1HeadStage - Abnormal NIO1HeadStage termination
[info] java.util.concurrent.TimeoutException: Timeout of 2 seconds triggered. Killing pipeline.
[info] 	at org.http4s.blaze.pipeline.stages.TimeoutStageBase$$anon$1.run(TimeoutStageBase.scala:29)
[info] 	at org.http4s.blaze.util.Execution$$anon$3.execute(Execution.scala:66)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Node.run(TickWheelExecutor.scala:261)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Bucket.checkNext$1(TickWheelExecutor.scala:193)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Bucket.prune(TickWheelExecutor.scala:200)
[info] 	at org.http4s.blaze.util.TickWheelExecutor.go$3(TickWheelExecutor.scala:153)
[info] 	at org.http4s.blaze.util.TickWheelExecutor.org$http4s$blaze$util$TickWheelExecutor$$cycle(TickWheelExecutor.scala:156)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$$anon$1.run(TickWheelExecutor.scala:55)
[info] 14:03:47.589 [blaze-selector-0-4] ERROR o.h.blaze.channel.nio1.NIO1HeadStage - Abnormal NIO1HeadStage termination
[info] java.util.concurrent.TimeoutException: Timeout of 2 seconds triggered. Killing pipeline.
[info] 	at org.http4s.blaze.pipeline.stages.TimeoutStageBase$$anon$1.run(TimeoutStageBase.scala:29)
[info] 	at org.http4s.blaze.util.Execution$$anon$3.execute(Execution.scala:66)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Node.run(TickWheelExecutor.scala:261)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Bucket.checkNext$1(TickWheelExecutor.scala:193)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$Bucket.prune(TickWheelExecutor.scala:200)
[info] 	at org.http4s.blaze.util.TickWheelExecutor.go$3(TickWheelExecutor.scala:153)
[info] 	at org.http4s.blaze.util.TickWheelExecutor.org$http4s$blaze$util$TickWheelExecutor$$cycle(TickWheelExecutor.scala:156)
[info] 	at org.http4s.blaze.util.TickWheelExecutor$$anon$1.run(TickWheelExecutor.scala:55)

SimpleBlazeServer.scala

package com.example.http4s.blaze

import cats.effect.IO
import java.util.concurrent.CountDownLatch
import org.http4s.HttpRoutes
import org.http4s.server.blaze.BlazeServerBuilder
import org.http4s.dsl.io._
import org.http4s.server.Router
import scala.concurrent.ExecutionContext
import scala.concurrent.duration._

object SimpleBlazeServer {

  implicit val cs = IO.contextShift(ExecutionContext.Implicits.global)
  val shutdownLatch = new CountDownLatch(1)

  def main(args: Array[String]): Unit = {
    val services = List(
      "/foo" -> HttpRoutes.of[IO] {
        case GET -> Root / "ping" => Ok("pong")
      }
    )

    val routes = Router[IO](services: _*)

    BlazeServerBuilder[IO].
      bindHttp(8080, "0.0.0.0").
      withIdleTimeout(2.seconds).
      withHttpApp(routes.orNotFound).
      resource.
      use(_ => IO.never).
      start.
      unsafeRunSync()

    shutdownLatch.await()
  }

}