[CHORE] Update akka (v2.6.9), akka http (v10.2.0)

Michal Mrozek · Michal Mrozek · commit e43bcff2d09c · 2020-09-11T14:26:40.000+02:00
diff --git a/build.sbt b/build.sbt
@@ -11,19 +11,20 @@ val commonSettings = Seq(
 resolvers += "rocksDb" at "https://dl.bintray.com/ethereum/maven/"
 
 val dep = {
-  val akkaVersion = "2.5.12"
-  val akkaHttpVersion = "10.1.1"
+  val akkaVersion = "2.6.9"
+  val akkaHttpVersion = "10.2.0"
   val circeVersion = "0.9.3"
   val rocksDb = "5.9.2"
   
   Seq(
     "com.typesafe.akka" %% "akka-actor" % akkaVersion,
     "com.typesafe.akka" %% "akka-slf4j" % akkaVersion,
     "com.typesafe.akka" %% "akka-testkit" % akkaVersion,
+    "com.typesafe.akka" %% "akka-stream" % akkaVersion,
     "com.typesafe.akka" %% "akka-http" % akkaHttpVersion,
-    "ch.megard" %% "akka-http-cors" % "0.3.0",
+    "ch.megard" %% "akka-http-cors" % "1.1.0",
     "org.json4s" %% "json4s-native" % "3.5.4",
-    "de.heikoseeberger" %% "akka-http-json4s" % "1.21.0",
+    "de.heikoseeberger" %% "akka-http-json4s" % "1.34.0",
     "com.typesafe.akka" %% "akka-http-testkit" % akkaHttpVersion % "it,test",
     "io.suzaku" %% "boopickle" % "1.3.0",
     "org.ethereum" % "rocksdbjni" % rocksDb,
@@ -37,9 +38,8 @@ val dep = {
     "io.circe" %% "circe-generic" % circeVersion,
     "io.circe" %% "circe-parser" % circeVersion,
     "io.circe" %% "circe-generic-extras" % circeVersion,
-    "com.miguno.akka" %% "akka-mock-scheduler" % "0.5.1" % "it,test",
+    "com.miguno.akka" %% "akka-mock-scheduler" % "0.5.5" % "it,test",
     "commons-io" % "commons-io" % "2.6",
-    "com.typesafe.akka" %% "akka-stream" % akkaVersion,
     "org.scala-sbt.ipcsocket" % "ipcsocket" % "1.0.0",
     "org.bouncycastle" % "bcprov-jdk15on" % "1.59",
     "com.typesafe.scala-logging" %% "scala-logging" % "3.9.0",
@@ -50,7 +50,6 @@ val dep = {
     // mallet deps
     "org.jline" % "jline" % "3.1.2",
     "net.java.dev.jna" % "jna" % "4.5.1",
-    "org.scala-lang.modules" %% "scala-parser-combinators" % "1.0.5",
     "com.github.scopt" %% "scopt" % "3.7.0",
 
     // Metrics (https://github.com/DataDog/java-dogstatsd-client)
diff --git a/src/it/scala/io/iohk/ethereum/txExecTest/util/DumpChainActor.scala b/src/it/scala/io/iohk/ethereum/txExecTest/util/DumpChainActor.scala
@@ -62,10 +62,9 @@ class DumpChainActor(peerManager: ActorRef, peerMessageBus: ActorRef, startBlock
   }
 
   //Periodically try to connect to bootstrap peer in case the connection failed before dump termination
-  val connectToBootstrapTimeout: Cancellable = context.system.scheduler.schedule(0 seconds, 4 seconds, () =>
-    peerManager ! PeerManagerActor.ConnectToPeer(new URI(bootstrapNode)))
+  val connectToBootstrapTimeout: Cancellable = context.system.scheduler.scheduleWithFixedDelay(0 seconds, 4 seconds, peerManager, PeerManagerActor.ConnectToPeer(new URI(bootstrapNode)))
 
-  val assignWorkTimeout: Cancellable = context.system.scheduler.schedule(0 seconds, 2 seconds, () => assignWork())
+  val assignWorkTimeout: Cancellable = context.system.scheduler.scheduleWithFixedDelay(0 seconds, 2 seconds)(() => assignWork())
 
   // scalastyle:off
   override def receive: Receive = {
diff --git a/src/main/scala/io/iohk/ethereum/blockchain/sync/FastSync.scala b/src/main/scala/io/iohk/ethereum/blockchain/sync/FastSync.scala
@@ -117,9 +117,9 @@ class FastSync(
 
     //Delay before starting to persist snapshot. It should be 0, as the presence of it marks that fast sync was started
     private val persistStateSnapshotDelay: FiniteDuration = 0.seconds
-    private val syncStatePersistCancellable = scheduler.schedule(persistStateSnapshotDelay, persistStateSnapshotInterval, self, PersistSyncState)
-    private val printStatusCancellable = scheduler.schedule(printStatusInterval, printStatusInterval, self, PrintStatus)
-    private val heartBeat = scheduler.schedule(syncRetryInterval, syncRetryInterval * 2, self, ProcessSyncing)
+    private val syncStatePersistCancellable = scheduler.scheduleWithFixedDelay(persistStateSnapshotDelay, persistStateSnapshotInterval, self, PersistSyncState)
+    private val printStatusCancellable = scheduler.scheduleWithFixedDelay(printStatusInterval, printStatusInterval, self, PrintStatus)
+    private val heartBeat = scheduler.scheduleWithFixedDelay(syncRetryInterval, syncRetryInterval * 2, self, ProcessSyncing)
 
     def receive: Receive = handleCommonMessages orElse {
       case UpdateTargetBlock(state) => updateTargetBlock(state)
diff --git a/src/main/scala/io/iohk/ethereum/blockchain/sync/PeerListSupport.scala b/src/main/scala/io/iohk/ethereum/blockchain/sync/PeerListSupport.scala
@@ -22,7 +22,7 @@ trait PeerListSupport {
 
   var handshakedPeers: PeersMap = Map.empty
 
-  scheduler.schedule(0.seconds, syncConfig.peersScanInterval, etcPeerManager, EtcPeerManagerActor.GetHandshakedPeers)(global, context.self)
+  scheduler.scheduleWithFixedDelay(0.seconds, syncConfig.peersScanInterval, etcPeerManager, EtcPeerManagerActor.GetHandshakedPeers)(global, context.self)
 
   def removePeer(peerId: PeerId): Unit = {
     peerEventBus ! Unsubscribe(PeerDisconnectedClassifier(PeerSelector.WithId(peerId)))
diff --git a/src/main/scala/io/iohk/ethereum/blockchain/sync/PeersClient.scala b/src/main/scala/io/iohk/ethereum/blockchain/sync/PeersClient.scala
@@ -25,7 +25,7 @@ class PeersClient(
   implicit val ec: ExecutionContext = context.dispatcher
 
   val statusSchedule: Cancellable =
-    scheduler.schedule(syncConfig.printStatusInterval, syncConfig.printStatusInterval, self, PrintStatus)
+    scheduler.scheduleWithFixedDelay(syncConfig.printStatusInterval, syncConfig.printStatusInterval, self, PrintStatus)
 
   def receive: Receive = running(Map())
 
diff --git a/src/main/scala/io/iohk/ethereum/blockchain/sync/regular/OldRegularSync.scala b/src/main/scala/io/iohk/ethereum/blockchain/sync/regular/OldRegularSync.scala
@@ -43,7 +43,7 @@ class OldRegularSync(
   import OldRegularSync._
   import syncConfig._
 
-  scheduler.schedule(printStatusInterval, printStatusInterval, self, PrintStatus)(global)
+  scheduler.scheduleWithFixedDelay(printStatusInterval, printStatusInterval, self, PrintStatus)(global)
 
   peerEventBus ! Subscribe(MessageClassifier(Set(NewBlock.code, NewBlockHashes.code), PeerSelector.AllPeers))
 
diff --git a/src/main/scala/io/iohk/ethereum/blockchain/sync/regular/RegularSync.scala b/src/main/scala/io/iohk/ethereum/blockchain/sync/regular/RegularSync.scala
@@ -31,9 +31,9 @@ class RegularSync(
       "block-importer")
 
   val printFetcherSchedule: Cancellable =
-    scheduler.schedule(syncConfig.printStatusInterval, syncConfig.printStatusInterval, fetcher, BlockFetcher.PrintStatus)(context.dispatcher)
+    scheduler.scheduleWithFixedDelay(syncConfig.printStatusInterval, syncConfig.printStatusInterval, fetcher, BlockFetcher.PrintStatus)(context.dispatcher)
   val printImporterSchedule: Cancellable =
-    scheduler.schedule(syncConfig.printStatusInterval, syncConfig.printStatusInterval, importer, BlockImporter.PrintStatus)(context.dispatcher)
+    scheduler.scheduleWithFixedDelay(syncConfig.printStatusInterval, syncConfig.printStatusInterval, importer, BlockImporter.PrintStatus)(context.dispatcher)
 
   override def receive: Receive = {
     case Start =>
diff --git a/src/main/scala/io/iohk/ethereum/extvm/ExtVMInterface.scala b/src/main/scala/io/iohk/ethereum/extvm/ExtVMInterface.scala
@@ -1,23 +1,19 @@
 package io.iohk.ethereum.extvm
 
-import java.nio.ByteOrder
-
 import akka.actor.ActorSystem
-import akka.stream.{ActorMaterializer, OverflowStrategy}
+import akka.stream.OverflowStrategy
 import akka.stream.scaladsl.{Framing, Keep, Sink, SinkQueueWithCancel, Source, SourceQueueWithComplete, Tcp}
 import akka.util.ByteString
 import io.iohk.ethereum.ledger.{InMemoryWorldStateProxy, InMemoryWorldStateProxyStorage}
 import io.iohk.ethereum.utils.{BlockchainConfig, VmConfig}
 import io.iohk.ethereum.vm._
-
+import java.nio.ByteOrder
 import scala.annotation.tailrec
 import scala.util.{Failure, Success, Try}
 
 class ExtVMInterface(externaVmConfig: VmConfig.ExternalConfig, blockchainConfig: BlockchainConfig, testMode: Boolean)(implicit system: ActorSystem)
   extends VM[InMemoryWorldStateProxy, InMemoryWorldStateProxyStorage]{
 
-  private implicit val materializer = ActorMaterializer()
-
   private var out: Option[SourceQueueWithComplete[ByteString]] = None
 
   private var in: Option[SinkQueueWithCancel[ByteString]] = None
diff --git a/src/main/scala/io/iohk/ethereum/extvm/VMServer.scala b/src/main/scala/io/iohk/ethereum/extvm/VMServer.scala
@@ -1,28 +1,23 @@
 package io.iohk.ethereum.extvm
 
-import java.nio.ByteOrder
-
 import akka.NotUsed
 import akka.actor.ActorSystem
+import akka.stream.OverflowStrategy
 import akka.stream.scaladsl.{Flow, Framing, Keep, Sink, Source, Tcp}
-import akka.stream.{ActorMaterializer, OverflowStrategy}
 import akka.util.ByteString
 import com.google.protobuf.{ByteString => GByteString}
 import com.typesafe.config.ConfigFactory
 import io.iohk.ethereum.domain.{Address, BlockHeader}
 import io.iohk.ethereum.extvm.Implicits._
 import io.iohk.ethereum.utils._
-import io.iohk.ethereum.vm._
-import io.iohk.ethereum.vm.BlockchainConfigForEvm
-import io.iohk.ethereum.vm.ProgramResult
-
+import io.iohk.ethereum.vm.{BlockchainConfigForEvm, ProgramResult, _}
+import java.nio.ByteOrder
 import scala.annotation.tailrec
 import scala.util.{Failure, Success, Try}
 
 object VmServerApp extends Logger {
 
   implicit val system = ActorSystem("EVM_System")
-  implicit val materializer = ActorMaterializer()
 
   def main(args: Array[String]): Unit = {
     val config = ConfigFactory.load()
diff --git a/src/main/scala/io/iohk/ethereum/faucet/Faucet.scala b/src/main/scala/io/iohk/ethereum/faucet/Faucet.scala
@@ -4,7 +4,6 @@ import java.security.SecureRandom
 
 import akka.actor.ActorSystem
 import akka.http.scaladsl.Http
-import akka.stream.ActorMaterializer
 import com.typesafe.config.ConfigFactory
 import io.iohk.ethereum.keystore.KeyStoreImpl
 import io.iohk.ethereum.mallet.service.RpcClient
@@ -19,13 +18,12 @@ object Faucet extends Logger {
     val config = FaucetConfig(ConfigFactory.load())
 
     implicit val system = ActorSystem("Faucet-system")
-    implicit val materializer = ActorMaterializer()
 
     val keyStore = new KeyStoreImpl(KeyStoreConfig.customKeyStoreConfig(config.keyStoreDir), new SecureRandom())
     val rpcClient = new RpcClient(config.rpcAddress)
     val api = new FaucetApi(rpcClient, keyStore, config)
 
-    val bindingResultF = Http().bindAndHandle(api.route, config.listenInterface, config.listenPort)
+    val bindingResultF = Http().newServerAt(config.listenInterface, config.listenPort).bind(api.route)
 
     bindingResultF onComplete {
       case Success(serverBinding) => log.info(s"Faucet HTTP server listening on ${serverBinding.localAddress}")
diff --git a/src/main/scala/io/iohk/ethereum/faucet/FaucetConfig.scala b/src/main/scala/io/iohk/ethereum/faucet/FaucetConfig.scala
@@ -1,10 +1,9 @@
 package io.iohk.ethereum.faucet
 
-import akka.http.scaladsl.model.headers.HttpOriginRange
+import ch.megard.akka.http.cors.scaladsl.model.HttpOriginMatcher
 import com.typesafe.config.{Config => TypesafeConfig}
 import io.iohk.ethereum.domain.Address
 import io.iohk.ethereum.utils.ConfigUtils
-
 import scala.concurrent.duration.{FiniteDuration, _}
 
 case class FaucetConfig(
@@ -13,7 +12,7 @@ case class FaucetConfig(
     txGasPrice: BigInt,
     txGasLimit: BigInt,
     txValue: BigInt,
-    corsAllowedOrigins: HttpOriginRange,
+    corsAllowedOrigins: HttpOriginMatcher,
     rpcAddress: String,
     keyStoreDir: String,
     listenInterface: String,
diff --git a/src/main/scala/io/iohk/ethereum/jsonrpc/server/http/BasicJsonRpcHttpServer.scala b/src/main/scala/io/iohk/ethereum/jsonrpc/server/http/BasicJsonRpcHttpServer.scala
@@ -2,12 +2,10 @@ package io.iohk.ethereum.jsonrpc.server.http
 
 import akka.actor.ActorSystem
 import akka.http.scaladsl.Http
-import akka.http.scaladsl.model.headers.HttpOriginRange
-import akka.stream.ActorMaterializer
+import ch.megard.akka.http.cors.scaladsl.model.HttpOriginMatcher
 import io.iohk.ethereum.jsonrpc._
 import io.iohk.ethereum.jsonrpc.server.http.JsonRpcHttpServer.JsonRpcHttpServerConfig
 import io.iohk.ethereum.utils.Logger
-
 import scala.concurrent.ExecutionContext.Implicits.global
 import scala.util.{Failure, Success}
 
@@ -16,15 +14,13 @@ class BasicJsonRpcHttpServer(val jsonRpcController: JsonRpcController, config: J
   extends JsonRpcHttpServer with Logger {
 
   def run(): Unit = {
-    implicit val materializer = ActorMaterializer()
-
-    val bindingResultF = Http(actorSystem).bindAndHandle(route, config.interface, config.port)
+    val bindingResultF = Http(actorSystem).newServerAt(config.interface, config.port).bind(route)
 
     bindingResultF onComplete {
       case Success(serverBinding) => log.info(s"JSON RPC HTTP server listening on ${serverBinding.localAddress}")
       case Failure(ex) => log.error("Cannot start JSON HTTP RPC server", ex)
     }
   }
 
-  override def corsAllowedOrigins: HttpOriginRange = config.corsAllowedOrigins
+  override def corsAllowedOrigins: HttpOriginMatcher = config.corsAllowedOrigins
 }
diff --git a/src/main/scala/io/iohk/ethereum/jsonrpc/server/http/JsonRpcHttpServer.scala b/src/main/scala/io/iohk/ethereum/jsonrpc/server/http/JsonRpcHttpServer.scala
@@ -1,21 +1,19 @@
 package io.iohk.ethereum.jsonrpc.server.http
 
-import java.security.SecureRandom
-
 import akka.actor.ActorSystem
 import akka.http.scaladsl.model.StatusCodes
-import akka.http.scaladsl.model.headers.HttpOriginRange
 import akka.http.scaladsl.server.Directives._
 import akka.http.scaladsl.server.{MalformedRequestContentRejection, RejectionHandler, Route}
 import ch.megard.akka.http.cors.javadsl.CorsRejection
 import ch.megard.akka.http.cors.scaladsl.CorsDirectives._
+import ch.megard.akka.http.cors.scaladsl.model.HttpOriginMatcher
 import ch.megard.akka.http.cors.scaladsl.settings.CorsSettings
 import de.heikoseeberger.akkahttpjson4s.Json4sSupport
 import io.iohk.ethereum.jsonrpc.{JsonRpcController, JsonRpcErrors, JsonRpcRequest, JsonRpcResponse}
 import io.iohk.ethereum.utils.{ConfigUtils, Logger}
+import java.security.SecureRandom
 import org.json4s.JsonAST.JInt
 import org.json4s.{DefaultFormats, native}
-
 import scala.concurrent.ExecutionContext.Implicits.global
 import scala.concurrent.Future
 import scala.util.Try
@@ -27,7 +25,7 @@ trait JsonRpcHttpServer extends Json4sSupport {
 
   implicit val formats = DefaultFormats
 
-  def corsAllowedOrigins: HttpOriginRange
+  def corsAllowedOrigins: HttpOriginMatcher
 
   val corsSettings = CorsSettings.defaultSettings
     .withAllowGenericHttpRequests(true)
@@ -84,7 +82,7 @@ object JsonRpcHttpServer extends Logger {
     val certificateKeyStorePath: Option[String]
     val certificateKeyStoreType: Option[String]
     val certificatePasswordFile: Option[String]
-    val corsAllowedOrigins: HttpOriginRange
+    val corsAllowedOrigins: HttpOriginMatcher
   }
 
   object JsonRpcHttpServerConfig {
diff --git a/src/main/scala/io/iohk/ethereum/jsonrpc/server/http/JsonRpcHttpsServer.scala b/src/main/scala/io/iohk/ethereum/jsonrpc/server/http/JsonRpcHttpsServer.scala
@@ -1,18 +1,15 @@
 package io.iohk.ethereum.jsonrpc.server.http
 
-import java.io.{File, FileInputStream}
-import java.security.{KeyStore, SecureRandom}
-import javax.net.ssl.{KeyManagerFactory, SSLContext, TrustManagerFactory}
-
 import akka.actor.ActorSystem
-import akka.http.scaladsl.model.headers.HttpOriginRange
 import akka.http.scaladsl.{ConnectionContext, Http}
-import akka.stream.ActorMaterializer
+import ch.megard.akka.http.cors.scaladsl.model.HttpOriginMatcher
 import io.iohk.ethereum.jsonrpc.JsonRpcController
 import io.iohk.ethereum.jsonrpc.server.http.JsonRpcHttpServer.JsonRpcHttpServerConfig
 import io.iohk.ethereum.jsonrpc.server.http.JsonRpcHttpsServer.HttpsSetupResult
 import io.iohk.ethereum.utils.Logger
-
+import java.io.{File, FileInputStream}
+import java.security.{KeyStore, SecureRandom}
+import javax.net.ssl.{KeyManagerFactory, SSLContext, TrustManagerFactory}
 import scala.concurrent.ExecutionContext.Implicits.global
 import scala.io.Source
 import scala.util.{Failure, Success, Try}
@@ -22,8 +19,6 @@ class JsonRpcHttpsServer(val jsonRpcController: JsonRpcController, config: JsonR
   extends JsonRpcHttpServer with Logger {
 
   def run(): Unit = {
-    implicit val materializer = ActorMaterializer()
-
     val maybeSslContext = validateCertificateFiles(config.certificateKeyStorePath, config.certificateKeyStoreType, config.certificatePasswordFile).flatMap{
       case (keystorePath, keystoreType, passwordFile) =>
         val passwordReader = Source.fromFile(passwordFile)
@@ -35,12 +30,11 @@ class JsonRpcHttpsServer(val jsonRpcController: JsonRpcController, config: JsonR
         }
     }
 
-    val maybeHttpsContext = maybeSslContext.map(sslContext => ConnectionContext.https(sslContext))
+    val maybeHttpsContext = maybeSslContext.map(sslContext => ConnectionContext.httpsServer(sslContext))
 
     maybeHttpsContext match {
       case Right(httpsContext) =>
-        Http().setDefaultServerHttpContext(httpsContext)
-        val bindingResultF = Http().bindAndHandle(route, config.interface, config.port, connectionContext = httpsContext)
+        val bindingResultF = Http().newServerAt(config.interface, config.port).enableHttps(httpsContext).bind(route)
 
         bindingResultF onComplete {
           case Success(serverBinding) => log.info(s"JSON RPC HTTPS server listening on ${serverBinding.localAddress}")
@@ -113,7 +107,7 @@ class JsonRpcHttpsServer(val jsonRpcController: JsonRpcController, config: JsonR
         Left("HTTPS requires: certificate-keystore-path, certificate-keystore-type and certificate-password-file to be configured")
     }
 
-  override def corsAllowedOrigins: HttpOriginRange = config.corsAllowedOrigins
+  override def corsAllowedOrigins: HttpOriginMatcher = config.corsAllowedOrigins
 }
 
 object JsonRpcHttpsServer {
diff --git a/src/main/scala/io/iohk/ethereum/mallet/service/RpcClient.scala b/src/main/scala/io/iohk/ethereum/mallet/service/RpcClient.scala
@@ -6,7 +6,6 @@ import java.util.UUID
 import akka.actor.ActorSystem
 import akka.http.scaladsl.Http
 import akka.http.scaladsl.model._
-import akka.stream.ActorMaterializer
 import akka.util.ByteString
 import com.typesafe.config.ConfigFactory
 import io.circe.generic.auto._
@@ -32,7 +31,6 @@ object RpcClient {
     val akkaConfig = ConfigFactory.load("mallet")
 
     implicit val system = ActorSystem("mallet_rpc", akkaConfig)
-    implicit val mat = ActorMaterializer()
     implicit val ec = scala.concurrent.ExecutionContext.Implicits.global
 
     new RpcClient(node)
@@ -43,7 +41,7 @@ object RpcClient {
   * Talks to a node over HTTP(S) JSON-RPC
   * Note: the URI schema determines whether HTTP or HTTPS is used
   */
-class RpcClient(node: Uri)(implicit system: ActorSystem, mat: ActorMaterializer, ec: ExecutionContext) {
+class RpcClient(node: Uri)(implicit system: ActorSystem, ec: ExecutionContext) {
   import CommonJsonCodecs._
 
   //TODO: CL option
diff --git a/src/main/scala/io/iohk/ethereum/network/KnownNodesManager.scala b/src/main/scala/io/iohk/ethereum/network/KnownNodesManager.scala
@@ -25,7 +25,7 @@ class KnownNodesManager(
 
   var toRemove: Set[URI] = Set.empty
 
-  scheduler.schedule(config.persistInterval, config.persistInterval, self, PersistChanges)
+  scheduler.scheduleWithFixedDelay(config.persistInterval, config.persistInterval, self, PersistChanges)
 
   override def receive: Receive = {
     case AddKnownNode(uri) =>
diff --git a/src/main/scala/io/iohk/ethereum/network/PeerManagerActor.scala b/src/main/scala/io/iohk/ethereum/network/PeerManagerActor.scala
@@ -59,9 +59,12 @@ class PeerManagerActor(
   }
 
   private def scheduleNodesUpdate(): Unit = {
-    scheduler.schedule(peerConfiguration.updateNodesInitialDelay, peerConfiguration.updateNodesInterval){
-      peerDiscoveryManager ! PeerDiscoveryManager.GetDiscoveredNodesInfo
-    }
+    scheduler.scheduleWithFixedDelay(
+      peerConfiguration.updateNodesInitialDelay,
+      peerConfiguration.updateNodesInterval,
+      peerDiscoveryManager,
+      PeerDiscoveryManager.GetDiscoveredNodesInfo
+    )
   }
 
   def listen(pendingPeers: PeerMap, peers: PeerMap): Receive = {
diff --git a/src/main/scala/io/iohk/ethereum/network/discovery/PeerDiscoveryManager.scala b/src/main/scala/io/iohk/ethereum/network/discovery/PeerDiscoveryManager.scala
@@ -38,7 +38,7 @@ class PeerDiscoveryManager(
 
   if (discoveryConfig.discoveryEnabled) {
     discoveryListener ! DiscoveryListener.Subscribe
-    context.system.scheduler.schedule(discoveryConfig.scanInitialDelay, discoveryConfig.scanInterval, self, Scan)
+    context.system.scheduler.scheduleWithFixedDelay(discoveryConfig.scanInitialDelay, discoveryConfig.scanInterval, self, Scan)
   }
 
   def scan(): Unit = {
diff --git a/src/main/scala/io/iohk/ethereum/utils/ConfigUtils.scala b/src/main/scala/io/iohk/ethereum/utils/ConfigUtils.scala
diff --git a/src/test/scala/io/iohk/ethereum/extvm/MessageHandlerSpec.scala b/src/test/scala/io/iohk/ethereum/extvm/MessageHandlerSpec.scala
diff --git a/src/test/scala/io/iohk/ethereum/faucet/FaucetApiSpec.scala b/src/test/scala/io/iohk/ethereum/faucet/FaucetApiSpec.scala
diff --git a/src/test/scala/io/iohk/ethereum/jsonrpc/server/http/JsonRpcHttpServerSpec.scala b/src/test/scala/io/iohk/ethereum/jsonrpc/server/http/JsonRpcHttpServerSpec.scala
