refactor(core)!: Remove webhook deregistration at startup and shutdown (#7515)

https://linear.app/n8n/issue/PAY-932/deprecate-flag-to-skip-webhook-deregistration-on-shutdown

packages/cli/BREAKING-CHANGES.md

@@ -2,6 +2,18 @@
 
 This list shows all the versions which include breaking changes and how to upgrade.
 
+## 1.15.0
+
+### What changed?
+
+Until now, in main mode, n8n used to deregister webhooks at shutdown and reregister them at startup. Queue mode and the flag `N8N_SKIP_WEBHOOK_DEREGISTRATION_SHUTDOWN` skipped webhook deregistration.
+
+As from now, in both main and queue modes, n8n no longer deregisters webhooks at startup and shutdown, and the flag `N8N_SKIP_WEBHOOK_DEREGISTRATION_SHUTDOWN` is removed. n8n assumes that third-party services will retry unhandled webhook requests.
+
+### When is action necessary?
+
+If using the flag `N8N_SKIP_WEBHOOK_DEREGISTRATION_SHUTDOWN`, note that it no longer has effect and can be removed from your settings.
+
 ## 1.9.0
 
 ### What changed?

packages/cli/src/ActiveWorkflowRunner.ts

@@ -47,7 +47,6 @@ import * as ResponseHelper from '@/ResponseHelper';
 import * as WebhookHelpers from '@/WebhookHelpers';
 import * as WorkflowExecuteAdditionalData from '@/WorkflowExecuteAdditionalData';
 
-import config from '@/config';
 import type { User } from '@db/entities/User';
 import type { WorkflowEntity } from '@db/entities/WorkflowEntity';
 import { ActiveExecutions } from '@/ActiveExecutions';
@@ -101,18 +100,6 @@ export class ActiveWorkflowRunner implements IWebhookManager {
 			relations: ['shared', 'shared.user', 'shared.user.globalRole', 'shared.role'],
 		})) as IWorkflowDb[];
 
-		if (!config.getEnv('endpoints.skipWebhooksDeregistrationOnShutdown')) {
-			// Do not clean up database when skip registration is done.
-			// This flag is set when n8n is running in scaled mode.
-			// Impact is minimal, but for a short while, n8n will stop accepting requests.
-			// Also, users had issues when running multiple "main process"
-			// instances if many of them start at the same time
-			// This is not officially supported but there is no reason
-			// it should not work.
-			// Clear up active workflow table
-			await this.webhookService.deleteInstanceWebhooks();
-		}
-
 		if (workflowsData.length !== 0) {
 			this.logger.info(' ================================');
 			this.logger.info('   Start Active Workflows:');
@@ -404,12 +391,7 @@ export class ActiveWorkflowRunner implements IWebhookManager {
 					false,
 				);
 			} catch (error) {
-				if (
-					activation === 'init' &&
-					config.getEnv('endpoints.skipWebhooksDeregistrationOnShutdown') &&
-					error.name === 'QueryFailedError'
-				) {
-					// When skipWebhooksDeregistrationOnShutdown is enabled,
+				if (activation === 'init' && error.name === 'QueryFailedError') {
 					// n8n does not remove the registered webhooks on exit.
 					// This means that further initializations will always fail
 					// when inserting to database. This is why we ignore this error

packages/cli/src/TestWebhooks.ts

@@ -284,12 +284,4 @@ export class TestWebhooks implements IWebhookManager {
 
 		return foundWebhook;
 	}
-
-	/**
-	 * Removes all the currently active test webhooks
-	 */
-	async removeAll(): Promise<void> {
-		const workflows = Object.values(this.testWebhookData).map(({ workflow }) => workflow);
-		return this.activeWebhooks.removeAll(workflows);
-	}
 }

packages/cli/src/commands/BaseCommand.ts

@@ -74,6 +74,12 @@ export abstract class BaseCommand extends Command {
 			);
 		}
 
+		if (process.env.N8N_SKIP_WEBHOOK_DEREGISTRATION_SHUTDOWN) {
+			this.logger.warn(
+				'The flag to skip webhook deregistration N8N_SKIP_WEBHOOK_DEREGISTRATION_SHUTDOWN has been removed. n8n no longer deregisters webhooks at startup and shutdown, in main and queue mode.',
+			);
+		}
+
 		await Container.get(PostHogClient).init();
 		await Container.get(InternalHooks).init();
 	}

packages/cli/src/commands/start.ts

@@ -21,7 +21,6 @@ import { ActiveWorkflowRunner } from '@/ActiveWorkflowRunner';
 import * as Db from '@/Db';
 import * as GenericHelpers from '@/GenericHelpers';
 import { Server } from '@/Server';
-import { TestWebhooks } from '@/TestWebhooks';
 import { EDITOR_UI_DIST_DIR, GENERATED_STATIC_DIR } from '@/constants';
 import { eventBus } from '@/eventbus';
 import { BaseCommand } from './BaseCommand';
@@ -115,21 +114,6 @@ export class Start extends BaseCommand {
 
 			await Container.get(InternalHooks).onN8nStop();
 
-			const skipWebhookDeregistration = config.getEnv(
-				'endpoints.skipWebhooksDeregistrationOnShutdown',
-			);
-
-			const removePromises = [];
-			if (!skipWebhookDeregistration) {
-				removePromises.push(this.activeWorkflowRunner.removeAll());
-			}
-
-			// Remove all test webhooks
-			const testWebhooks = Container.get(TestWebhooks);
-			removePromises.push(testWebhooks.removeAll());
-
-			await Promise.all(removePromises);
-
 			// Wait for active workflow executions to finish
 			const activeExecutionsInstance = Container.get(ActiveExecutions);
 			let executingWorkflows = activeExecutionsInstance.getActiveExecutions();

packages/cli/src/services/webhook.service.ts

@@ -107,12 +107,6 @@ export class WebhookService {
 		return this.deleteWebhooks(webhooks);
 	}
 
-	async deleteInstanceWebhooks() {
-		const webhooks = await this.webhookRepository.find();
-
-		return this.deleteWebhooks(webhooks);
-	}
-
 	private async deleteWebhooks(webhooks: WebhookEntity[]) {
 		void this.cacheService.deleteMany(webhooks.map((w) => w.cacheKey));
 

packages/cli/test/unit/ActiveWorkflowRunner.test.ts

@@ -160,7 +160,6 @@ describe('ActiveWorkflowRunner', () => {
 		await activeWorkflowRunner.init();
 		expect(await activeWorkflowRunner.getActiveWorkflows()).toHaveLength(0);
 		expect(mocked(Db.collections.Workflow.find)).toHaveBeenCalled();
-		expect(webhookService.deleteInstanceWebhooks).toHaveBeenCalled();
 		expect(externalHooks.run).toHaveBeenCalledTimes(1);
 	});
 
@@ -171,7 +170,6 @@ describe('ActiveWorkflowRunner', () => {
 			databaseActiveWorkflowsCount,
 		);
 		expect(mocked(Db.collections.Workflow.find)).toHaveBeenCalled();
-		expect(webhookService.deleteInstanceWebhooks).toHaveBeenCalled();
 		expect(externalHooks.run).toHaveBeenCalled();
 	});
 

packages/cli/test/unit/services/webhook.service.test.ts

@@ -150,30 +150,6 @@ describe('WebhookService', () => {
 		});
 	});
 
-	describe('deleteInstanceWebhooks()', () => {
-		test('should delete all webhooks of the instance', async () => {
-			const mockInstanceWebhooks = [
-				createWebhook('PUT', 'users'),
-				createWebhook('GET', 'user/:id'),
-				createWebhook('POST', ':var'),
-			];
-
-			webhookRepository.find.mockResolvedValue(mockInstanceWebhooks);
-
-			await webhookService.deleteInstanceWebhooks();
-
-			expect(webhookRepository.remove).toHaveBeenCalledWith(mockInstanceWebhooks);
-		});
-
-		test('should not delete any webhooks if none found', async () => {
-			webhookRepository.find.mockResolvedValue([]);
-
-			await webhookService.deleteInstanceWebhooks();
-
-			expect(webhookRepository.remove).toHaveBeenCalledWith([]);
-		});
-	});
-
 	describe('deleteWorkflowWebhooks()', () => {
 		test('should delete all webhooks of the workflow', async () => {
 			const mockWorkflowWebhooks = [