refactor(amber): rename remaining Akka* identifiers to Pekko* (#4949)

Yicong-Huang · web-flow · commit 2b763e442d3b · 2026-05-12T04:32:08.000Z
### What changes were proposed in this PR? The project moved off Akka onto Apache Pekko, but several internal Scala identifiers still carried the `Akka` prefix even though they wrap Pekko APIs. Pure rename across `amber` and `common/config`: - `AkkaConfig` → `PekkoConfig` (object + file) - `AkkaActorService` → `PekkoActorService` (class + file) - `AkkaActorRefMappingService` → `PekkoActorRefMappingService` - `AkkaMessageTransferService` → `PekkoMessageTransferService` - `akkaConfig`, `akkaActorService` method/parameter names → pekko-prefixed No behavior change. No string literals, config keys, or serialization registrations are touched — `cluster.conf` already uses `pekko.*` keys, the kryo registry doesn't reference these classes by name. The intentional `"akka"` literal in `DeployStrategiesSpec.scala` that contrasts pekko vs akka address strings stays. ### Any related issues, documentation, discussions? Closes #4948. ### How was this PR tested? `sbt WorkflowExecutionService/Test/compile` clean, `sbt WorkflowExecutionService/scalafmtCheckAll` clean. ### Was this PR authored or co-authored using generative AI tooling? Generated-by: Claude Opus 4.7 (Claude Code)
diff --git a/amber/src/main/scala/org/apache/texera/amber/engine/architecture/common/ExecutorDeployment.scala b/amber/src/main/scala/org/apache/texera/amber/engine/architecture/common/ExecutorDeployment.scala
@@ -38,7 +38,7 @@ object ExecutorDeployment {
 
   def createWorkers(
       op: PhysicalOp,
-      controllerActorService: AkkaActorService,
+      controllerActorService: PekkoActorService,
       operatorExecution: OperatorExecution,
       operatorConfig: OperatorConfig,
       stateRestoreConfig: Option[StateRestoreConfig],
diff --git a/amber/src/main/scala/org/apache/texera/amber/engine/architecture/common/PekkoActorRefMappingService.scala b/amber/src/main/scala/org/apache/texera/amber/engine/architecture/common/PekkoActorRefMappingService.scala
@@ -33,7 +33,7 @@ import org.apache.texera.amber.util.VirtualIdentityUtils
 
 import scala.collection.mutable
 
-class AkkaActorRefMappingService(actorService: AkkaActorService) extends AmberLogging {
+class PekkoActorRefMappingService(actorService: PekkoActorService) extends AmberLogging {
 
   override def actorId: ActorVirtualIdentity = actorService.id
 
diff --git a/amber/src/main/scala/org/apache/texera/amber/engine/architecture/common/PekkoActorService.scala b/amber/src/main/scala/org/apache/texera/amber/engine/architecture/common/PekkoActorService.scala
@@ -28,7 +28,7 @@ import org.apache.texera.amber.engine.common.FutureBijection._
 import scala.concurrent.ExecutionContext
 import scala.concurrent.duration.{DurationInt, FiniteDuration}
 
-class AkkaActorService(val id: ActorVirtualIdentity, actorContext: ActorContext) {
+class PekkoActorService(val id: ActorVirtualIdentity, actorContext: ActorContext) {
 
   implicit def ec: ExecutionContext = actorContext.dispatcher
 
diff --git a/amber/src/main/scala/org/apache/texera/amber/engine/architecture/common/PekkoMessageTransferService.scala b/amber/src/main/scala/org/apache/texera/amber/engine/architecture/common/PekkoMessageTransferService.scala
@@ -30,9 +30,9 @@ import org.apache.texera.amber.engine.common.ambermessage.WorkflowFIFOMessage
 import scala.collection.mutable
 import scala.concurrent.duration.DurationInt
 
-class AkkaMessageTransferService(
-    actorService: AkkaActorService,
-    refService: AkkaActorRefMappingService,
+class PekkoMessageTransferService(
+    actorService: PekkoActorService,
+    refService: PekkoActorRefMappingService,
     handleBackpressure: Boolean => Unit
 ) extends AmberLogging {
 
diff --git a/amber/src/main/scala/org/apache/texera/amber/engine/architecture/common/WorkflowActor.scala b/amber/src/main/scala/org/apache/texera/amber/engine/architecture/common/WorkflowActor.scala
@@ -83,9 +83,9 @@ abstract class WorkflowActor(
     with AmberLogging {
 
   //
-  // Akka related components:
+  // Pekko related components:
   //
-  val actorService: AkkaActorService = new AkkaActorService(actorId, this.context)
+  val actorService: PekkoActorService = new PekkoActorService(actorId, this.context)
   actorService.getAvailableNodeAddressesFunc = () => {
     implicit val timeout: Timeout = 5.seconds
     Await
@@ -95,12 +95,12 @@ abstract class WorkflowActor(
       )
       .asInstanceOf[Array[Address]]
   }
-  val actorRefMappingService: AkkaActorRefMappingService = new AkkaActorRefMappingService(
+  val actorRefMappingService: PekkoActorRefMappingService = new PekkoActorRefMappingService(
     actorService
   )
   actorRefMappingService.registerActorRef(actorId, self)
-  val transferService: AkkaMessageTransferService =
-    new AkkaMessageTransferService(actorService, actorRefMappingService, handleBackpressure)
+  val transferService: PekkoMessageTransferService =
+    new PekkoMessageTransferService(actorService, actorRefMappingService, handleBackpressure)
 
   logger.info(s"worker replay log writing conf: $replayLogConfOpt")
 
diff --git a/amber/src/main/scala/org/apache/texera/amber/engine/architecture/controller/ControllerProcessor.scala b/amber/src/main/scala/org/apache/texera/amber/engine/architecture/controller/ControllerProcessor.scala
@@ -22,9 +22,9 @@ package org.apache.texera.amber.engine.architecture.controller
 import org.apache.texera.amber.core.virtualidentity.ActorVirtualIdentity
 import org.apache.texera.amber.core.workflow.WorkflowContext
 import org.apache.texera.amber.engine.architecture.common.{
-  AkkaActorRefMappingService,
-  AkkaActorService,
-  AkkaMessageTransferService,
+  PekkoActorRefMappingService,
+  PekkoActorService,
+  PekkoMessageTransferService,
   AmberProcessor
 }
 import org.apache.texera.amber.engine.architecture.controller.execution.WorkflowExecution
@@ -57,21 +57,21 @@ class ControllerProcessor(
     this.controllerTimerService = controllerTimerService
   }
 
-  @transient var transferService: AkkaMessageTransferService = _
+  @transient var transferService: PekkoMessageTransferService = _
 
-  def setupTransferService(transferService: AkkaMessageTransferService): Unit = {
+  def setupTransferService(transferService: PekkoMessageTransferService): Unit = {
     this.transferService = transferService
   }
 
-  @transient var actorService: AkkaActorService = _
+  @transient var actorService: PekkoActorService = _
 
-  def setupActorService(akkaActorService: AkkaActorService): Unit = {
-    this.actorService = akkaActorService
+  def setupActorService(pekkoActorService: PekkoActorService): Unit = {
+    this.actorService = pekkoActorService
   }
 
-  @transient var actorRefService: AkkaActorRefMappingService = _
+  @transient var actorRefService: PekkoActorRefMappingService = _
 
-  def setupActorRefService(actorRefService: AkkaActorRefMappingService): Unit = {
+  def setupActorRefService(actorRefService: PekkoActorRefMappingService): Unit = {
     this.actorRefService = actorRefService
     this.workflowExecutionCoordinator.setupActorRefService(this.actorRefService)
   }
diff --git a/amber/src/main/scala/org/apache/texera/amber/engine/architecture/controller/ControllerTimerService.scala b/amber/src/main/scala/org/apache/texera/amber/engine/architecture/controller/ControllerTimerService.scala
@@ -20,7 +20,7 @@
 package org.apache.texera.amber.engine.architecture.controller
 
 import org.apache.pekko.actor.Cancellable
-import org.apache.texera.amber.engine.architecture.common.AkkaActorService
+import org.apache.texera.amber.engine.architecture.common.PekkoActorService
 import org.apache.texera.amber.engine.architecture.rpc.controlcommands.{
   AsyncRPCContext,
   QueryStatisticsRequest,
@@ -34,7 +34,7 @@ import scala.concurrent.duration.{DurationInt, FiniteDuration, MILLISECONDS}
 
 class ControllerTimerService(
     controllerConfig: ControllerConfig,
-    akkaActorService: AkkaActorService
+    pekkoActorService: PekkoActorService
 ) {
   var statusUpdateAskHandle: Option[Cancellable] = None
   var runtimeStatisticsAskHandle: Option[Cancellable] = None
@@ -46,7 +46,7 @@ class ControllerTimerService(
   ): Option[Cancellable] = {
     if (intervalMs.nonEmpty && handleOpt.isEmpty) {
       Option(
-        akkaActorService.sendToSelfWithFixedDelay(
+        pekkoActorService.sendToSelfWithFixedDelay(
           0.milliseconds,
           FiniteDuration.apply(intervalMs.get, MILLISECONDS),
           ControlInvocation(
diff --git a/amber/src/main/scala/org/apache/texera/amber/engine/architecture/messaginglayer/WorkerTimerService.scala b/amber/src/main/scala/org/apache/texera/amber/engine/architecture/messaginglayer/WorkerTimerService.scala
@@ -21,7 +21,7 @@ package org.apache.texera.amber.engine.architecture.messaginglayer
 
 import org.apache.pekko.actor.Cancellable
 import org.apache.texera.amber.config.ApplicationConfig
-import org.apache.texera.amber.engine.architecture.common.AkkaActorService
+import org.apache.texera.amber.engine.architecture.common.PekkoActorService
 import org.apache.texera.amber.engine.architecture.rpc.controlcommands.{
   AsyncRPCContext,
   EmptyRequest
@@ -33,7 +33,7 @@ import org.apache.texera.amber.engine.common.virtualidentity.util.SELF
 
 import scala.concurrent.duration.{DurationInt, FiniteDuration, MILLISECONDS}
 
-class WorkerTimerService(actorService: AkkaActorService) {
+class WorkerTimerService(actorService: PekkoActorService) {
 
   private val enabledAdaptiveBatching = ApplicationConfig.enableAdaptiveNetworkBuffering
   private val adaptiveBatchInterval = ApplicationConfig.adaptiveBufferingTimeoutMs
diff --git a/amber/src/main/scala/org/apache/texera/amber/engine/architecture/scheduling/RegionExecutionCoordinator.scala b/amber/src/main/scala/org/apache/texera/amber/engine/architecture/scheduling/RegionExecutionCoordinator.scala
@@ -26,8 +26,8 @@ import org.apache.texera.amber.core.storage.VFSURIFactory.decodeURI
 import org.apache.texera.amber.core.virtualidentity.ActorVirtualIdentity
 import org.apache.texera.amber.core.workflow.{GlobalPortIdentity, PhysicalLink, PhysicalOp}
 import org.apache.texera.amber.engine.architecture.common.{
-  AkkaActorRefMappingService,
-  AkkaActorService,
+  PekkoActorRefMappingService,
+  PekkoActorService,
   ExecutorDeployment
 }
 import org.apache.texera.amber.engine.architecture.controller.execution.{
@@ -95,8 +95,8 @@ class RegionExecutionCoordinator(
     workflowExecution: WorkflowExecution,
     asyncRPCClient: AsyncRPCClient,
     controllerConfig: ControllerConfig,
-    actorService: AkkaActorService,
-    actorRefService: AkkaActorRefMappingService
+    actorService: PekkoActorService,
+    actorRefService: PekkoActorRefMappingService
 ) extends AmberLogging {
 
   initRegionExecution()
@@ -374,7 +374,7 @@ class RegionExecutionCoordinator(
   }
 
   private def buildOperator(
-      actorService: AkkaActorService,
+      actorService: PekkoActorService,
       physicalOp: PhysicalOp,
       operatorConfig: OperatorConfig,
       operatorExecution: OperatorExecution
diff --git a/amber/src/main/scala/org/apache/texera/amber/engine/architecture/scheduling/WorkflowExecutionCoordinator.scala b/amber/src/main/scala/org/apache/texera/amber/engine/architecture/scheduling/WorkflowExecutionCoordinator.scala
@@ -23,8 +23,8 @@ import com.twitter.util.Future
 import com.typesafe.scalalogging.LazyLogging
 import org.apache.texera.amber.core.workflow.{GlobalPortIdentity, PhysicalLink}
 import org.apache.texera.amber.engine.architecture.common.{
-  AkkaActorRefMappingService,
-  AkkaActorService
+  PekkoActorRefMappingService,
+  PekkoActorService
 }
 import org.apache.texera.amber.engine.architecture.controller.ControllerConfig
 import org.apache.texera.amber.engine.architecture.controller.ExecutionStateUpdate
@@ -49,9 +49,9 @@ class WorkflowExecutionCoordinator(
     mutable.HashMap()
   private val completionNotified: AtomicBoolean = new AtomicBoolean(false)
 
-  @transient var actorRefService: AkkaActorRefMappingService = _
+  @transient var actorRefService: PekkoActorRefMappingService = _
 
-  def setupActorRefService(actorRefService: AkkaActorRefMappingService): Unit = {
+  def setupActorRefService(actorRefService: PekkoActorRefMappingService): Unit = {
     this.actorRefService = actorRefService
   }
 
@@ -62,7 +62,7 @@ class WorkflowExecutionCoordinator(
     *
     * After the syncs, if there are no running region(s), it will start new regions (if available).
     */
-  def coordinateRegionExecutors(actorService: AkkaActorService): Future[Unit] = {
+  def coordinateRegionExecutors(actorService: PekkoActorService): Future[Unit] = {
     val unfinishedRegionCoordinators =
       regionExecutionCoordinators.values.filter(!_.isCompleted).toSeq
 
diff --git a/amber/src/main/scala/org/apache/texera/amber/engine/common/AmberRuntime.scala b/amber/src/main/scala/org/apache/texera/amber/engine/common/AmberRuntime.scala
@@ -23,7 +23,7 @@ import org.apache.pekko.actor.{ActorSystem, Address, Cancellable, DeadLetter, Pr
 import org.apache.pekko.serialization.{Serialization, SerializationExtension}
 import com.typesafe.config.{Config, ConfigFactory}
 import org.apache.texera.amber.clustering.ClusterListener
-import org.apache.texera.amber.config.AkkaConfig
+import org.apache.texera.amber.config.PekkoConfig
 import org.apache.texera.amber.engine.architecture.messaginglayer.DeadLetterMonitorActor
 
 import java.io.{BufferedReader, InputStreamReader}
@@ -39,7 +39,7 @@ object AmberRuntime {
   def serde: Serialization = {
     if (_serde == null) {
       if (_actorSystem == null) {
-        _serde = SerializationExtension(ActorSystem("Amber", akkaConfig))
+        _serde = SerializationExtension(ActorSystem("Amber", pekkoConfig))
       } else {
         _serde = SerializationExtension(_actorSystem)
       }
@@ -83,13 +83,13 @@ object AmberRuntime {
         pekko.remote.artery.canonical.hostname = $localIpAddress
         pekko.cluster.seed-nodes = [ "pekko://Amber@$localIpAddress:2552" ]
         """)
-      .withFallback(akkaConfig)
+      .withFallback(pekkoConfig)
       .resolve()
     AmberConfig.masterNodeAddr = createMasterAddress(localIpAddress)
     createAmberSystem(masterConfig)
   }
 
-  def akkaConfig: Config = AkkaConfig.akkaConfig
+  def pekkoConfig: Config = PekkoConfig.pekkoConfig
 
   private def createMasterAddress(addr: String): Address = Address("pekko", "Amber", addr, 2552)
 
@@ -105,7 +105,7 @@ object AmberRuntime {
         pekko.remote.artery.canonical.port = 0
         pekko.cluster.seed-nodes = [ "pekko://Amber@$addr:2552" ]
         """)
-      .withFallback(akkaConfig)
+      .withFallback(pekkoConfig)
       .resolve()
     AmberConfig.masterNodeAddr = createMasterAddress(addr)
     createAmberSystem(workerConfig)
diff --git a/amber/src/test/integration/org/apache/texera/amber/engine/e2e/ReconfigurationIntegrationSpec.scala b/amber/src/test/integration/org/apache/texera/amber/engine/e2e/ReconfigurationIntegrationSpec.scala
@@ -62,7 +62,7 @@ import scala.concurrent.duration._
   */
 @IntegrationTest
 class ReconfigurationIntegrationSpec
-    extends TestKit(ActorSystem("ReconfigurationIntegrationSpec", AmberRuntime.akkaConfig))
+    extends TestKit(ActorSystem("ReconfigurationIntegrationSpec", AmberRuntime.pekkoConfig))
     with ImplicitSender
     with AnyFlatSpecLike
     with BeforeAndAfterAll
diff --git a/amber/src/test/scala/org/apache/texera/amber/engine/architecture/logreplay/LogreplayPrimitivesSpec.scala b/amber/src/test/scala/org/apache/texera/amber/engine/architecture/logreplay/LogreplayPrimitivesSpec.scala
@@ -62,7 +62,7 @@ class LogreplayPrimitivesSpec extends AnyFlatSpec with BeforeAndAfterAll {
   // so no Pekko threads outlive the suite. (Same pattern as
   // CheckpointSubsystemSpec.)
   private val testSystem: ActorSystem =
-    ActorSystem("LogreplayPrimitivesSpec-test", AmberRuntime.akkaConfig)
+    ActorSystem("LogreplayPrimitivesSpec-test", AmberRuntime.pekkoConfig)
   private val testSerde: Serialization = SerializationExtension(testSystem)
 
   private def setAmberRuntimeField(name: String, value: AnyRef): Unit = {
diff --git a/amber/src/test/scala/org/apache/texera/amber/engine/architecture/messaginglayer/CongestionControlSpec.scala b/amber/src/test/scala/org/apache/texera/amber/engine/architecture/messaginglayer/CongestionControlSpec.scala
@@ -214,7 +214,7 @@ class CongestionControlSpec extends AnyFlatSpec {
   }
 
   it should "return only the messages whose sentTime is older than resendTimeLimit" in {
-    // Cover the AkkaMessageTransferService.checkResend() retransmission path:
+    // Cover the PekkoMessageTransferService.checkResend() retransmission path:
     // the in-transit message that has been sitting past the 60s
     // resendTimeLimit must surface; the freshly-sent one must not.
     val cc = new CongestionControl()
diff --git a/amber/src/test/scala/org/apache/texera/amber/engine/architecture/scheduling/RegionCoordinatorTestSupport.scala b/amber/src/test/scala/org/apache/texera/amber/engine/architecture/scheduling/RegionCoordinatorTestSupport.scala
@@ -35,8 +35,8 @@ import org.apache.texera.amber.core.workflow.WorkflowContext.{
   DEFAULT_WORKFLOW_ID
 }
 import org.apache.texera.amber.engine.architecture.common.{
-  AkkaActorRefMappingService,
-  AkkaActorService,
+  PekkoActorRefMappingService,
+  PekkoActorService,
   WorkflowActor
 }
 import org.apache.texera.amber.engine.architecture.controller.execution.WorkflowExecution
@@ -78,8 +78,8 @@ object RegionCoordinatorTestSupport {
   )
 
   case class ControllerHarnessFixture(
-      actorService: AkkaActorService,
-      actorRefService: AkkaActorRefMappingService
+      actorService: PekkoActorService,
+      actorRefService: PekkoActorRefMappingService
   )
 
   /**
@@ -231,7 +231,7 @@ trait RegionCoordinatorTestSupport { self: TestKit =>
   }
 
   protected def registerLiveWorker(
-      actorRefService: AkkaActorRefMappingService,
+      actorRefService: PekkoActorRefMappingService,
       workerId: ActorVirtualIdentity
   ): ActorRef = {
     val workerRef = system.actorOf(Props(new IdleActor), s"worker-${System.nanoTime()}")
diff --git a/amber/src/test/scala/org/apache/texera/amber/engine/architecture/scheduling/RegionExecutionCoordinatorSpec.scala b/amber/src/test/scala/org/apache/texera/amber/engine/architecture/scheduling/RegionExecutionCoordinatorSpec.scala
@@ -24,7 +24,7 @@ import org.apache.pekko.actor.ActorSystem
 import org.apache.pekko.testkit.TestKit
 import org.apache.texera.amber.core.virtualidentity.{ActorVirtualIdentity, ChannelIdentity}
 import org.apache.texera.amber.core.workflow.PhysicalOp
-import org.apache.texera.amber.engine.architecture.common.AkkaActorRefMappingService
+import org.apache.texera.amber.engine.architecture.common.PekkoActorRefMappingService
 import org.apache.texera.amber.engine.architecture.controller.ControllerConfig
 import org.apache.texera.amber.engine.architecture.controller.execution.WorkflowExecution
 import org.apache.texera.amber.engine.architecture.rpc.controlreturns._
@@ -51,7 +51,7 @@ import java.util.concurrent.atomic
   *    workers terminated, and allow the next region to start.
   */
 class RegionExecutionCoordinatorSpec
-    extends TestKit(ActorSystem("RegionExecutionCoordinatorSpec", AmberRuntime.akkaConfig))
+    extends TestKit(ActorSystem("RegionExecutionCoordinatorSpec", AmberRuntime.pekkoConfig))
     with AnyFlatSpecLike
     with BeforeAndAfterAll
     with RegionCoordinatorTestSupport {
@@ -117,7 +117,7 @@ class RegionExecutionCoordinatorSpec
       region: Region,
       physicalOp: PhysicalOp,
       workerId: ActorVirtualIdentity,
-      actorRefService: AkkaActorRefMappingService
+      actorRefService: PekkoActorRefMappingService
   )
 
   private def createSingleRegionFixture(
diff --git a/amber/src/test/scala/org/apache/texera/amber/engine/architecture/scheduling/WorkflowExecutionCoordinatorSpec.scala b/amber/src/test/scala/org/apache/texera/amber/engine/architecture/scheduling/WorkflowExecutionCoordinatorSpec.scala
@@ -38,7 +38,7 @@ import org.scalatest.BeforeAndAfterAll
 import org.scalatest.flatspec.AnyFlatSpecLike
 
 class WorkflowExecutionCoordinatorSpec
-    extends TestKit(ActorSystem("WorkflowExecutionCoordinatorSpec", AmberRuntime.akkaConfig))
+    extends TestKit(ActorSystem("WorkflowExecutionCoordinatorSpec", AmberRuntime.pekkoConfig))
     with AnyFlatSpecLike
     with BeforeAndAfterAll
     with RegionCoordinatorTestSupport {
diff --git a/amber/src/test/scala/org/apache/texera/amber/engine/architecture/worker/WorkerSpec.scala b/amber/src/test/scala/org/apache/texera/amber/engine/architecture/worker/WorkerSpec.scala
@@ -64,7 +64,7 @@ class DummyOperatorExecutor extends OperatorExecutor {
 }
 
 class WorkerSpec
-    extends TestKit(ActorSystem("WorkerSpec", AmberRuntime.akkaConfig))
+    extends TestKit(ActorSystem("WorkerSpec", AmberRuntime.pekkoConfig))
     with ImplicitSender
     with AnyFlatSpecLike
     with BeforeAndAfterAll
diff --git a/amber/src/test/scala/org/apache/texera/amber/engine/common/CheckpointSubsystemSpec.scala b/amber/src/test/scala/org/apache/texera/amber/engine/common/CheckpointSubsystemSpec.scala
@@ -35,7 +35,7 @@ class CheckpointSubsystemSpec extends AnyFlatSpec with BeforeAndAfterAll {
   // and AmberRuntime's reference are torn down in afterAll, so no Pekko
   // threads outlive the test (matching ControllerSpec/WorkerSpec hygiene).
   private val testSystem: ActorSystem =
-    ActorSystem("CheckpointSubsystemSpec-test", AmberRuntime.akkaConfig)
+    ActorSystem("CheckpointSubsystemSpec-test", AmberRuntime.pekkoConfig)
   private val testSerde: Serialization = SerializationExtension(testSystem)
 
   private def setAmberRuntimeField(name: String, value: AnyRef): Unit = {
diff --git a/amber/src/test/scala/org/apache/texera/amber/engine/e2e/DataProcessingSpec.scala b/amber/src/test/scala/org/apache/texera/amber/engine/e2e/DataProcessingSpec.scala
@@ -55,7 +55,7 @@ import org.scalatest.{BeforeAndAfterAll, BeforeAndAfterEach, Outcome, Retries}
 import scala.concurrent.duration.DurationInt
 
 class DataProcessingSpec
-    extends TestKit(ActorSystem("DataProcessingSpec", AmberRuntime.akkaConfig))
+    extends TestKit(ActorSystem("DataProcessingSpec", AmberRuntime.pekkoConfig))
     with ImplicitSender
     with AnyFlatSpecLike
     with BeforeAndAfterAll
diff --git a/amber/src/test/scala/org/apache/texera/amber/engine/e2e/PauseSpec.scala b/amber/src/test/scala/org/apache/texera/amber/engine/e2e/PauseSpec.scala
@@ -51,7 +51,7 @@ import org.scalatest.{BeforeAndAfterAll, BeforeAndAfterEach, Outcome, Retries}
 import scala.concurrent.duration._
 
 class PauseSpec
-    extends TestKit(ActorSystem("PauseSpec", AmberRuntime.akkaConfig))
+    extends TestKit(ActorSystem("PauseSpec", AmberRuntime.pekkoConfig))
     with ImplicitSender
     with AnyFlatSpecLike
     with BeforeAndAfterAll
diff --git a/amber/src/test/scala/org/apache/texera/amber/engine/e2e/ReconfigurationSpec.scala b/amber/src/test/scala/org/apache/texera/amber/engine/e2e/ReconfigurationSpec.scala
@@ -42,7 +42,7 @@ import org.scalatest.flatspec.AnyFlatSpecLike
 import scala.concurrent.duration._
 
 class ReconfigurationSpec
-    extends TestKit(ActorSystem("ReconfigurationSpec", AmberRuntime.akkaConfig))
+    extends TestKit(ActorSystem("ReconfigurationSpec", AmberRuntime.pekkoConfig))
     with ImplicitSender
     with AnyFlatSpecLike
     with BeforeAndAfterAll
diff --git a/amber/src/test/scala/org/apache/texera/amber/engine/faulttolerance/CheckpointSpec.scala b/amber/src/test/scala/org/apache/texera/amber/engine/faulttolerance/CheckpointSpec.scala
diff --git a/amber/src/test/scala/org/apache/texera/amber/engine/faulttolerance/LoggingSpec.scala b/amber/src/test/scala/org/apache/texera/amber/engine/faulttolerance/LoggingSpec.scala
diff --git a/common/config/src/main/scala/org/apache/texera/amber/config/PekkoConfig.scala b/common/config/src/main/scala/org/apache/texera/amber/config/PekkoConfig.scala
