chore(runner): move max duration logic into parent process

.changeset/big-ants-act.md

@@ -0,0 +1,6 @@
+---
+"trigger.dev": patch
+"@trigger.dev/core": patch
+---
+
+Move max duration handling into the parent process

packages/cli-v3/src/entryPoints/dev-run-worker.ts

@@ -128,6 +128,17 @@ usage.setGlobalUsageManager(devUsageManager);
 const usageTimeoutManager = new UsageTimeoutManager(devUsageManager);
 timeout.setGlobalManager(usageTimeoutManager);
 
+// Register listener to send IPC message when max duration is exceeded
+timeout.registerListener(async (maxDurationInSeconds, elapsedTimeInSeconds) => {
+  log(
+    `[${new Date().toISOString()}] Max duration exceeded: ${maxDurationInSeconds}s, elapsed: ${elapsedTimeInSeconds}s`
+  );
+  await zodIpc.send("MAX_DURATION_EXCEEDED", {
+    maxDurationInSeconds,
+    elapsedTimeInSeconds,
+  });
+});
+
 const standardResourceCatalog = new StandardResourceCatalog();
 resourceCatalog.setGlobalResourceCatalog(standardResourceCatalog);
 

packages/cli-v3/src/entryPoints/managed-run-worker.ts

@@ -726,6 +726,17 @@ function initializeUsageManager({
   usage.setGlobalUsageManager(prodUsageManager);
   timeout.setGlobalManager(new UsageTimeoutManager(devUsageManager));
 
+  // Register listener to send IPC message when max duration is exceeded
+  timeout.registerListener(async (maxDurationInSeconds, elapsedTimeInSeconds) => {
+    console.log(
+      `[${new Date().toISOString()}] Max duration exceeded: ${maxDurationInSeconds}s, elapsed: ${elapsedTimeInSeconds}s`
+    );
+    await zodIpc.send("MAX_DURATION_EXCEEDED", {
+      maxDurationInSeconds,
+      elapsedTimeInSeconds,
+    });
+  });
+
   return prodUsageManager;
 }
 

packages/cli-v3/src/executions/taskRunProcess.ts

@@ -30,6 +30,7 @@ import {
   CleanupProcessError,
   internalErrorFromUnexpectedExit,
   GracefulExitTimeoutError,
+  MaxDurationExceededError,
   UnexpectedExitError,
   SuspendedProcessError,
 } from "@trigger.dev/core/v3/errors";
@@ -74,6 +75,8 @@ export class TaskRunProcess {
   private _isBeingKilled: boolean = false;
   private _isBeingCancelled: boolean = false;
   private _isBeingSuspended: boolean = false;
+  private _isMaxDurationExceeded: boolean = false;
+  private _maxDurationInfo?: { maxDurationInSeconds: number; elapsedTimeInSeconds: number };
   private _stderr: Array<string> = [];
 
   public onTaskRunHeartbeat: Evt<string> = new Evt();
@@ -209,6 +212,23 @@ export class TaskRunProcess {
         SET_SUSPENDABLE: async (message) => {
           this.onSetSuspendable.post(message);
         },
+        MAX_DURATION_EXCEEDED: async (message) => {
+          logger.debug("max duration exceeded, gracefully terminating child process", {
+            maxDurationInSeconds: message.maxDurationInSeconds,
+            elapsedTimeInSeconds: message.elapsedTimeInSeconds,
+            pid: this.pid,
+          });
+
+          // Set flag and store duration info for error reporting in #handleExit
+          this._isMaxDurationExceeded = true;
+          this._maxDurationInfo = {
+            maxDurationInSeconds: message.maxDurationInSeconds,
+            elapsedTimeInSeconds: message.elapsedTimeInSeconds,
+          };
+
+          // Use the same graceful termination approach as cancel
+          await this.#gracefullyTerminate(this.options.gracefulTerminationTimeoutInMs);
+        },
       },
     });
 
@@ -319,7 +339,25 @@ export class TaskRunProcess {
 
         const { rejecter } = attemptPromise;
 
-        if (this._isBeingCancelled) {
+        if (this._isMaxDurationExceeded) {
+          if (!this._maxDurationInfo) {
+            rejecter(
+              new UnexpectedExitError(
+                code ?? -1,
+                signal,
+                "MaxDuration flag set but duration info missing"
+              )
+            );
+            continue;
+          }
+
+          rejecter(
+            new MaxDurationExceededError(
+              this._maxDurationInfo.maxDurationInSeconds,
+              this._maxDurationInfo.elapsedTimeInSeconds
+            )
+          );
+        } else if (this._isBeingCancelled) {
           rejecter(new CancelledProcessError());
         } else if (this._gracefulExitTimeoutElapsed) {
           // Order matters, this has to be before the graceful exit timeout
@@ -477,6 +515,14 @@ export class TaskRunProcess {
       };
     }
 
+    if (error instanceof MaxDurationExceededError) {
+      return {
+        type: "INTERNAL_ERROR",
+        code: TaskRunErrorCodes.MAX_DURATION_EXCEEDED,
+        message: error.message,
+      };
+    }
+
     if (error instanceof CleanupProcessError) {
       return {
         type: "INTERNAL_ERROR",

packages/core/src/v3/errors.ts

@@ -557,6 +557,17 @@ export class GracefulExitTimeoutError extends Error {
   }
 }
 
+export class MaxDurationExceededError extends Error {
+  constructor(
+    public readonly maxDurationInSeconds: number,
+    public readonly elapsedTimeInSeconds: number
+  ) {
+    super(`Run exceeded maximum compute time (maxDuration) of ${maxDurationInSeconds} seconds`);
+
+    this.name = "MaxDurationExceededError";
+  }
+}
+
 type ErrorLink = {
   name: string;
   href: string;

packages/core/src/v3/schemas/messages.ts

@@ -189,6 +189,13 @@ export const ExecutorToWorkerMessageCatalog = {
       suspendable: z.boolean(),
     }),
   },
+  MAX_DURATION_EXCEEDED: {
+    message: z.object({
+      version: z.literal("v1").default("v1"),
+      maxDurationInSeconds: z.number(),
+      elapsedTimeInSeconds: z.number(),
+    }),
+  },
 };
 
 export const WorkerToExecutorMessageCatalog = {

packages/core/src/v3/timeout/api.ts

@@ -47,6 +47,13 @@ export class TimeoutAPI implements TimeoutManager {
     this.disable();
   }
 
+  public registerListener(listener: (timeoutInSeconds: number, elapsedTimeInSeconds: number) => void | Promise<void>) {
+    const manager = this.#getManager();
+    if (manager.registerListener) {
+      manager.registerListener(listener);
+    }
+  }
+
   #getManager(): TimeoutManager {
     return getGlobal(API_NAME) ?? NOOP_TIMEOUT_MANAGER;
   }

packages/core/src/v3/timeout/types.ts

@@ -2,6 +2,7 @@ export interface TimeoutManager {
   abortAfterTimeout: (timeoutInSeconds?: number) => AbortController;
   signal?: AbortSignal;
   reset: () => void;
+  registerListener?: (listener: (timeoutInSeconds: number, elapsedTimeInSeconds: number) => void | Promise<void>) => void;
 }
 
 export class TaskRunExceededMaxDuration extends Error {

packages/core/src/v3/timeout/usageTimeoutManager.ts

@@ -5,11 +5,21 @@ export class UsageTimeoutManager implements TimeoutManager {
   private _abortController: AbortController;
   private _abortSignal: AbortSignal | undefined;
   private _intervalId: NodeJS.Timeout | undefined;
+  private _listener?: (
+    timeoutInSeconds: number,
+    elapsedTimeInSeconds: number
+  ) => void | Promise<void>;
 
   constructor(private readonly usageManager: UsageManager) {
     this._abortController = new AbortController();
   }
 
+  registerListener(
+    listener: (timeoutInSeconds: number, elapsedTimeInSeconds: number) => void | Promise<void>
+  ): void {
+    this._listener = listener;
+  }
+
   get signal(): AbortSignal | undefined {
     return this._abortSignal;
   }
@@ -42,8 +52,15 @@ export class UsageTimeoutManager implements TimeoutManager {
         if (sample.cpuTime > timeoutInSeconds * 1000) {
           clearInterval(this._intervalId);
 
+          const elapsedTimeInSeconds = sample.cpuTime / 1000;
+
+          // Call the listener if registered
+          if (this._listener) {
+            this._listener(timeoutInSeconds, elapsedTimeInSeconds);
+          }
+
           this._abortController.abort(
-            new TaskRunExceededMaxDuration(timeoutInSeconds, sample.cpuTime / 1000)
+            new TaskRunExceededMaxDuration(timeoutInSeconds, elapsedTimeInSeconds)
           );
         }
       }

packages/core/src/v3/workers/taskExecutor.ts

@@ -3,7 +3,6 @@ import { promiseWithResolvers } from "../../utils.js";
 import { ApiError, RateLimitError } from "../apiClient/errors.js";
 import { ConsoleInterceptor } from "../consoleInterceptor.js";
 import {
-  InternalError,
   isCompleteTaskWithOutput,
   isInternalError,
   parseError,
@@ -419,29 +418,13 @@ export class TaskExecutor {
       throw new Error("Task does not have a run function");
     }
 
-    // Create a promise that rejects when the signal aborts
-    const abortPromise = new Promise((_, reject) => {
-      signal.addEventListener("abort", () => {
-        if (typeof signal.reason === "string" && signal.reason.includes("cancel")) {
-          return;
-        }
-
-        const maxDuration = ctx.run.maxDuration;
-        reject(
-          new InternalError({
-            code: TaskRunErrorCodes.MAX_DURATION_EXCEEDED,
-            message: `Run exceeded maximum compute time (maxDuration) of ${maxDuration} seconds`,
-          })
-        );
-      });
-    });
-
     return runTimelineMetrics.measureMetric("trigger.dev/execution", "run", async () => {
       return await this._tracer.startActiveSpan(
         "run()",
         async (span) => {
-          // Race between the run function and the abort promise
-          return await Promise.race([runFn(payload, { ctx, init, signal }), abortPromise]);
+          // maxDuration is now enforced by killing the process, not by Promise.race
+          // The signal is still passed to runFn for cancellation and other abort conditions
+          return await runFn(payload, { ctx, init, signal });
         },
         {
           attributes: { [SemanticInternalAttributes.STYLE_ICON]: "task-fn-run" },