[worker] remove legacy task execution framework

config/server.yaml

@@ -96,8 +96,8 @@ taskDriver:
   # must be a non-negative integer unique per instance/worker
   # must be omitted when `randomWorkerIdEnabled` is set `true`
   id: 0
-  # whether to use the new task acquisition logic (beta) or the old one (slow) 
-  newAcquisitionLogic: false
+  # deprecated enabled by default - kept to ensure it's not breaking config parsing - can be removed July 2025 
+  newAcquisitionLogic: true
 
 rca:
   # default values - structure example

kubernetes/helm/startree-thirdeye/templates/coordinator/configmap.yaml

@@ -95,7 +95,6 @@ data:
       noTaskDelay: {{ .Values.worker.config.noTaskDelay | default 15 }}
       heartbeatInterval: {{ .Values.worker.config.heartbeatInterval | default 30 }}
       activeThresholdMultiplier: {{ .Values.worker.config.activeThresholdMultiplier | default 30 }}
-      newAcquisitionLogic: {{ .Values.worker.config.newAcquisitionLogic | default false }}
 
     defaultWorkspaceConfiguration:
       timeConfiguration:

kubernetes/helm/startree-thirdeye/templates/scheduler/scheduler-config.yaml

@@ -115,7 +115,6 @@ data:
       {{- end }}
       heartbeatInterval: {{ .Values.worker.config.heartbeatInterval | default 30 }}
       activeThresholdMultiplier: {{ .Values.worker.config.activeThresholdMultiplier | default 30 }}
-      newAcquisitionLogic: {{ .Values.worker.config.newAcquisitionLogic | default false }}
 
     defaultWorkspaceConfiguration:
       timeConfiguration:

kubernetes/helm/startree-thirdeye/templates/worker/worker-config.yaml

@@ -119,7 +119,6 @@ data:
       noTaskDelay: {{ .Values.worker.config.noTaskDelay | default 15 }}
       heartbeatInterval: {{ .Values.worker.config.heartbeatInterval | default 30 }}
       activeThresholdMultiplier: {{ .Values.worker.config.activeThresholdMultiplier | default 30 }}
-      newAcquisitionLogic: {{ .Values.worker.config.newAcquisitionLogic | default false }}
 
     defaultWorkspaceConfiguration:
       timeConfiguration:

thirdeye-integration-tests/src/test/resources/anomalyresolution/config/server.yaml

@@ -63,7 +63,6 @@ taskDriver:
   noTaskDelay: 1
   randomDelayCap: 1
   taskFailureDelay: 1
-  newAcquisitionLogic: true
 
 scheduler:
   # Run the Quartz Scheduler.

thirdeye-integration-tests/src/test/resources/happypath/config/server.yaml

@@ -71,4 +71,3 @@ taskDriver:
   noTaskDelay: 1
   randomDelayCap: 1
   taskFailureDelay: 1
-  newAcquisitionLogic: true

thirdeye-integration-tests/src/test/resources/scheduling/config/server.yaml

@@ -63,7 +63,6 @@ taskDriver:
   noTaskDelay: 1
   randomDelayCap: 1
   taskFailureDelay: 1
-  newAcquisitionLogic: true
 
 scheduler:
   # Run the Quartz Scheduler.

thirdeye-integration-tests/src/test/resources/schedulingquota/config/server.yaml

@@ -63,7 +63,6 @@ taskDriver:
   noTaskDelay: 1
   randomDelayCap: 1
   taskFailureDelay: 1
-  newAcquisitionLogic: true
   maxParallelTasks: 1
 
 scheduler:

thirdeye-worker/src/main/java/ai/startree/thirdeye/worker/task/TaskDriverConfiguration.java

@@ -13,6 +13,7 @@
  */
 package ai.startree.thirdeye.worker.task;
 
+import com.fasterxml.jackson.annotation.JsonIgnore;
 import java.time.Duration;
 
 public class TaskDriverConfiguration {
@@ -31,8 +32,8 @@ public class TaskDriverConfiguration {
   private int taskFetchSizeCap = 50;
   private int maxParallelTasks = 5;
 
-  // still experimental -- TODO CYRIL - set to true once validated and stable - then remove
-  private boolean newAcquisitionLogic = false;
+  @JsonIgnore // not used anymore - newAcquisitionLogic is enabled by default now - can be removed July 2025
+  private boolean newAcquisitionLogic = true;
 
   public Long getId() {
     return id;
@@ -133,10 +134,12 @@ public TaskDriverConfiguration setActiveThresholdMultiplier(final int activeThre
     return this;
   }
 
+  @Deprecated(forRemoval = true)  // can be removed July 2025
   public boolean isNewAcquisitionLogic() {
     return newAcquisitionLogic;
   }
 
+  @Deprecated(forRemoval = true) // can be removed July 2025
   public TaskDriverConfiguration setNewAcquisitionLogic(
       final boolean newAcquisitionLogic) {
     this.newAcquisitionLogic = newAcquisitionLogic;

thirdeye-worker/src/main/java/ai/startree/thirdeye/worker/task/TaskDriverRunnable.java

@@ -22,7 +22,6 @@
 import ai.startree.thirdeye.spi.task.TaskStatus;
 import ai.startree.thirdeye.spi.task.TaskType;
 import com.google.inject.Singleton;
-import io.micrometer.core.instrument.Counter;
 import io.micrometer.core.instrument.Metrics;
 import io.micrometer.core.instrument.Timer;
 import io.micrometer.core.instrument.Timer.Sample;
@@ -52,7 +51,6 @@ public class TaskDriverRunnable implements Runnable {
   private final Timer taskRunTimerOfSuccess;
   private final Timer taskRunTimerOfException;
   private final Timer taskWaitTimer;
-  private final Counter taskConcurrentAcquisition;
 
   public TaskDriverRunnable(final TaskContext taskContext) {
     this.taskContext = taskContext;
@@ -79,15 +77,12 @@ public TaskDriverRunnable(final TaskContext taskContext) {
         .description(
             "Start: a task is created in the persistence layer. End: the task is picked by a task runner for execution.")
         .register(Metrics.globalRegistry);
-    taskConcurrentAcquisition = Counter.builder("thirdeye_task_concurrent_acquisition")
-        .description("Count the number of time a worker fails to take a lock on a task because the task is locked by another process (most likely another worker).")
-        .register(Metrics.globalRegistry);
   }
 
   public void run() {
     while (!isShutdown()) {
       // select a task to execute, and update it to RUNNING
-      final TaskDTO taskDTO = config.isNewAcquisitionLogic() ? waitForTask() : waitForTaskLegacy();
+      final TaskDTO taskDTO = waitForTask();
       if (taskDTO == null) {
         continue;
       }
@@ -160,52 +155,6 @@ private Future<List<TaskResult>> runTaskAsync(final TaskDTO taskDTO) throws IOEx
         .submit(() -> taskRunner.execute(taskInfo, taskContext, taskDTO.namespace()));
   }
 
-  /**
-   * Returns a TaskDTO if a task is successfully acquired; returns null if system is shutting down.
-   *
-   * @return null if system is shutting down.
-   */
-  @Deprecated
-  private TaskDTO waitForTaskLegacy() {
-    while (!isShutdown()) {
-      final TaskDTO nextTask;
-      try {
-        nextTask = taskManager.findNextTaskToRun();
-      } catch (Exception e) {
-        LOG.error("Failed to fetch a new task to run", e);
-        idleTimer().record(() -> sleep(true));
-        continue;
-      }
-      if (nextTask == null) {
-        // no task found
-        idleTimer().record(() -> sleep(false));
-        continue;
-      }
-      if (isShutdown()) {
-        break;
-      }
-      try {
-        boolean success = taskManager.acquireTaskToRun(nextTask, workerId);
-        if (success) {
-          final long waitTime = System.currentTimeMillis() - nextTask.getCreateTime().getTime();
-          taskWaitTimer.record(waitTime, TimeUnit.MILLISECONDS);
-          return nextTask;
-        } else {
-          taskConcurrentAcquisition.increment();
-          LOG.debug("Failed to acquire task {} referencing {} from worker id {}. Task was locked, or edited by another transaction.)", nextTask.getId(),
-              nextTask.getRefId(), workerId);
-          // don't sleep - look for a next task
-          continue;  
-        }
-      } catch (Exception e) {
-        LOG.warn("Failed to acquire task {} from worker id {})", nextTask, workerId, e);
-        idleTimer().record(() -> sleep(true));
-        continue;
-      }
-    }
-    return null;
-  }
-
   /**
    * Returns a TaskDTO if a task is successfully acquired; returns null if system is shutting down.
    *

thirdeye-worker/src/test/java/ai/startree/thirdeye/worker/task/HeartbeatTest.java

@@ -67,8 +67,7 @@ private static String toJson(final Object object) {
   public void setUp() {
     config = new TaskDriverConfiguration()
         .setRandomWorkerIdEnabled(true)
-        .setHeartbeatInterval(HEARTBEAT_INTERVAL)
-        .setNewAcquisitionLogic(true);
+        .setHeartbeatInterval(HEARTBEAT_INTERVAL);
 
     taskManager = Mockito.mock(TaskManager.class);