How to increase request timeout for http4s - http4s

Question

I have a request that is talking to a backend db that takes time to respond. And the http4s is throwing request timeout. I wanted to know if there is a property to increase the request timeout?
Thanks
Saad.

Answer 1

Server Timeouts
BlazeBuilder can easily be adjusted. The default implementation is
import org.http4s._
import scala.concurrent.duration._
BlazeBuilder(
socketAddress = InetSocketAddress.createUnresolved(LoopbackAddress, 8080),
serviceExecutor = DefaultPool, // #org.http4s.util.threads - ExecutorService
idleTimeout = 30.seconds
isNio2 = false,
connectorPoolSize = math.max(4, Runtime.getRuntime.availableProcessors() + 1),
bufferSize = 64*1024,
enableWebSockets = true,
sslBits = None,
isHttp2Enabled = false,
maxRequestLineLen = 4*1024,
maxHeadersLen = 40*1024,
serviceMounts = Vector.empty
)
We can utilize the default and change that, as the class has a copy method implemented.
import org.http4s._
import scala.concurrent.duration._
BlazeBuilder.copy(idleTimeout = 5.minutes)
You can then proceed with your server however you would like, adding your services and then serving.
Client Timeouts
BlazeClient takes a config class called BlazeClientConfig
The default is
import org.http4s._
import org.http4s.client._
BlazeClientConfig(
idleTimeout = 60.seconds,
requestTimeout = Duration.Inf,
userAgent = Some(
`User-Agent`(AgentProduct("http4s-blaze", Some(BuildInfo.version)))
),
sslContext = None,
checkEndpointIdentification = true,
maxResponseLineSize = 4*1024,
maxHeaderLength = 40*1024,
maxChunkSize = Integer.MAX_VALUE,
lenientParser = false,
bufferSize = 8*1024,
customeExecutor = None,
group = None
)
However we have a default config and as it exists as a case class you would probably be better modifying the default. Use PooledHttp1Client under most cases.
import scala.concurrent.duration._
import org.http4s.client._
val longTimeoutConfig =
BlazeClientConfig
.defaultConfig
.copy(idleTimeout = 5.minutes)
val client = PooledHttp1Client(
maxTotalConnections = 10,
config = longTimeoutConfig
)