fix(core): Fixes event msg confirmations if no subscribers present (#5118)

* adds ExecutionEvents view modal to ExecutionList

* fix time rendering and remove wf column

* checks for unfinished executions and fails them

* prevent re-setting stoppedAt for execution

* removing UI changes but keeping eventbus fixes

* remove comment

.vscode/launch.json

@@ -35,6 +35,23 @@
 			"outputCapture": "std",
 			"killBehavior": "polite"
 		},
+		{
+			"name": "Launch n8n CLI dev with debug",
+			"runtimeExecutable": "pnpm",
+			"cwd": "${workspaceFolder}/packages/cli",
+			"runtimeArgs": ["run", "dev", "--", "--inspect-brk"],
+			"console": "integratedTerminal",
+			"restart": true,
+			"autoAttachChildProcesses": true,
+			"request": "launch",
+			"skipFiles": ["<node_internals>/**"],
+			"type": "node",
+			"env": {
+				// "N8N_PORT": "5679",
+			},
+			"outputCapture": "std",
+			"killBehavior": "polite"
+		},
 		{
 			"name": "Debug CLI tests",
 			"cwd": "${workspaceFolder}/packages/cli",

packages/cli/src/eventbus/EventMessageClasses/Helpers.ts

@@ -3,6 +3,8 @@ import { EventMessageGeneric, EventMessageGenericOptions } from './EventMessageG
 import type { AbstractEventMessageOptions } from './AbstractEventMessageOptions';
 import { EventMessageWorkflow, EventMessageWorkflowOptions } from './EventMessageWorkflow';
 import { EventMessageTypeNames } from 'n8n-workflow';
+import { EventMessageAudit, EventMessageAuditOptions } from './EventMessageAudit';
+import { EventMessageNode, EventMessageNodeOptions } from './EventMessageNode';
 
 export const getEventMessageObjectByType = (
 	message: AbstractEventMessageOptions,
@@ -12,6 +14,10 @@ export const getEventMessageObjectByType = (
 			return new EventMessageGeneric(message as EventMessageGenericOptions);
 		case EventMessageTypeNames.workflow:
 			return new EventMessageWorkflow(message as EventMessageWorkflowOptions);
+		case EventMessageTypeNames.audit:
+			return new EventMessageAudit(message as EventMessageAuditOptions);
+		case EventMessageTypeNames.node:
+			return new EventMessageNode(message as EventMessageNodeOptions);
 		default:
 			return null;
 	}

packages/cli/src/eventbus/MessageEventBus/MessageEventBus.ts

@@ -24,7 +24,7 @@ import {
 	eventMessageGenericDestinationTestEvent,
 } from '../EventMessageClasses/EventMessageGeneric';
 
-export type EventMessageReturnMode = 'sent' | 'unsent' | 'all';
+export type EventMessageReturnMode = 'sent' | 'unsent' | 'all' | 'unfinished';
 
 class MessageEventBus extends EventEmitter {
 	private static instance: MessageEventBus;
@@ -89,14 +89,20 @@ class MessageEventBus extends EventEmitter {
 		// - cycle event logs and start the logging to a fresh file
 		// - retry sending events
 		LoggerProxy.debug('Checking for unsent event messages');
-		const unsentMessages = await this.getEventsUnsent();
+		const unsentAndUnfinished = await this.getUnsentAndUnfinishedExecutions();
 		LoggerProxy.debug(
 			`Start logging into ${
 				(await this.logWriter?.getThread()?.getLogFileName()) ?? 'unknown filename'
 			} `,
 		);
 		await this.logWriter?.startLogging();
-		await this.send(unsentMessages);
+		await this.send(unsentAndUnfinished.unsentMessages);
+
+		if (unsentAndUnfinished.unfinishedExecutions.size > 0) {
+			for (const executionId of unsentAndUnfinished.unfinishedExecutions) {
+				LoggerProxy.debug(`Found unfinished execution ${executionId} in event log(s)`);
+			}
+		}
 
 		// if configured, run this test every n ms
 		if (config.getEnv('eventBus.checkUnsentInterval') > 0) {
@@ -190,6 +196,15 @@ class MessageEventBus extends EventEmitter {
 		await this.logWriter?.confirmMessageSent(msg.id, source);
 	}
 
+	private hasAnyDestinationSubscribedToEvent(msg: EventMessageTypes): boolean {
+		for (const destinationName of Object.keys(this.destinations)) {
+			if (this.destinations[destinationName].hasSubscribedToEvent(msg)) {
+				return true;
+			}
+		}
+		return false;
+	}
+
 	private async emitMessage(msg: EventMessageTypes) {
 		// generic emit for external modules to capture events
 		// this is for internal use ONLY and not for use with custom destinations!
@@ -198,7 +213,11 @@ class MessageEventBus extends EventEmitter {
 		LoggerProxy.debug(`Listeners: ${this.eventNames().join(',')}`);
 
 		// if there are no set up destinations, immediately mark the event as sent
-		if (!isLogStreamingEnabled() || Object.keys(this.destinations).length === 0) {
+		if (
+			!isLogStreamingEnabled() ||
+			Object.keys(this.destinations).length === 0 ||
+			!this.hasAnyDestinationSubscribedToEvent(msg)
+		) {
 			await this.confirmSent(msg, { id: '0', name: 'eventBus' });
 		} else {
 			for (const destinationName of Object.keys(this.destinations)) {
@@ -207,32 +226,50 @@ class MessageEventBus extends EventEmitter {
 		}
 	}
 
-	async getEvents(mode: EventMessageReturnMode = 'all'): Promise<EventMessageTypes[]> {
+	async getEventsAll(): Promise<EventMessageTypes[]> {
-		let queryResult: EventMessageTypes[];
+		const queryResult = await this.logWriter?.getMessagesAll();
-		switch (mode) {
-			case 'all':
-				queryResult = await this.logWriter?.getMessages();
-				break;
-			case 'sent':
-				queryResult = await this.logWriter?.getMessagesSent();
-				break;
-			case 'unsent':
-				queryResult = await this.logWriter?.getMessagesUnsent();
-		}
 		const filtered = uniqby(queryResult, 'id');
 		return filtered;
 	}
 
 	async getEventsSent(): Promise<EventMessageTypes[]> {
-		const sentMessages = await this.getEvents('sent');
+		const queryResult = await this.logWriter?.getMessagesSent();
-		return sentMessages;
+		const filtered = uniqby(queryResult, 'id');
+		return filtered;
 	}
 
 	async getEventsUnsent(): Promise<EventMessageTypes[]> {
-		const unSentMessages = await this.getEvents('unsent');
+		const queryResult = await this.logWriter?.getMessagesUnsent();
-		return unSentMessages;
+		const filtered = uniqby(queryResult, 'id');
+		return filtered;
 	}
 
+	async getUnfinishedExecutions(): Promise<Set<string>> {
+		const queryResult = await this.logWriter?.getUnfinishedExecutions();
+		return queryResult;
+	}
+
+	async getUnsentAndUnfinishedExecutions(): Promise<{
+		unsentMessages: EventMessageTypes[];
+		unfinishedExecutions: Set<string>;
+	}> {
+		const queryResult = await this.logWriter?.getUnsentAndUnfinishedExecutions();
+		return queryResult;
+	}
+
+	/**
+	 * This will pull all events for a given execution id from the event log files. Note that this can be a very expensive operation, depending on the number of events and the size of the log files.
+	 * @param executionId id to look for
+	 * @param logHistory defaults to 1, which means it will look at the current log file AND the previous one.
+	 * @returns Array of EventMessageTypes
+	 */
+	async getEventsByExecutionId(
+		executionId: string,
+		logHistory?: number,
+	): Promise<EventMessageTypes[]> {
+		const result = await this.logWriter?.getMessagesByExecutionId(executionId, logHistory);
+		return result;
+	}
 	/**
 	 * Convenience Methods
 	 */

packages/cli/src/eventbus/MessageEventBusWriter/MessageEventBusLogWriter.ts

@@ -28,6 +28,12 @@ interface MessageEventBusLogWriterOptions {
 	maxFileSizeInKB?: number;
 }
 
+interface ReadMessagesFromLogFileResult {
+	loggedMessages: EventMessageTypes[];
+	sentMessages: EventMessageTypes[];
+	unfinishedExecutions: Set<string>;
+}
+
 /**
  * MessageEventBusWriter for Files
  */
@@ -138,45 +144,31 @@ export class MessageEventBusLogWriter {
 
 	async getMessages(
 		mode: EventMessageReturnMode = 'all',
-		includePreviousLog = true,
+		logHistory = 1,
-	): Promise<EventMessageTypes[]> {
+	): Promise<ReadMessagesFromLogFileResult> {
-		const logFileName0 = await MessageEventBusLogWriter.instance.getThread()?.getLogFileName();
+		const results: ReadMessagesFromLogFileResult = {
-		const logFileName1 = includePreviousLog
-			? await MessageEventBusLogWriter.instance.getThread()?.getLogFileName(1)
-			: undefined;
-		const results: {
-			loggedMessages: EventMessageTypes[];
-			sentMessages: EventMessageTypes[];
-		} = {
 			loggedMessages: [],
 			sentMessages: [],
+			unfinishedExecutions: new Set<string>(),
 		};
-		if (logFileName0) {
+		const logCount = logHistory
-			await this.readLoggedMessagesFromFile(results, mode, logFileName0);
+			? Math.min(config.get('eventBus.logWriter.keepLogCount') as number, logHistory)
-		}
+			: (config.get('eventBus.logWriter.keepLogCount') as number);
-		if (logFileName1) {
+		for (let i = logCount; i >= 0; i--) {
-			await this.readLoggedMessagesFromFile(results, mode, logFileName1);
+			const logFileName = await MessageEventBusLogWriter.instance.getThread()?.getLogFileName(i);
-		}
+			if (logFileName) {
-		switch (mode) {
+				await this.readLoggedMessagesFromFile(results, mode, logFileName);
-			case 'all':
+			}
-			case 'unsent':
-				return results.loggedMessages;
-			case 'sent':
-				return results.sentMessages;
 		}
+
+		return results;
 	}
 
 	async readLoggedMessagesFromFile(
-		results: {
+		results: ReadMessagesFromLogFileResult,
-			loggedMessages: EventMessageTypes[];
-			sentMessages: EventMessageTypes[];
-		},
 		mode: EventMessageReturnMode,
 		logFileName: string,
-	): Promise<{
+	): Promise<ReadMessagesFromLogFileResult> {
-		loggedMessages: EventMessageTypes[];
-		sentMessages: EventMessageTypes[];
-	}> {
 		if (logFileName && existsSync(logFileName)) {
 			try {
 				const rl = readline.createInterface({
@@ -189,6 +181,15 @@ export class MessageEventBusLogWriter {
 						if (isEventMessageOptions(json) && json.__type !== undefined) {
 							const msg = getEventMessageObjectByType(json);
 							if (msg !== null) results.loggedMessages.push(msg);
+							if (msg?.eventName === 'n8n.workflow.started' && msg?.payload?.executionId) {
+								results.unfinishedExecutions.add(msg?.payload?.executionId as string);
+							} else if (
+								(msg?.eventName === 'n8n.workflow.success' ||
+									msg?.eventName === 'n8n.workflow.failed') &&
+								msg?.payload?.executionId
+							) {
+								results.unfinishedExecutions.delete(msg?.payload?.executionId as string);
+							}
 						}
 						if (isEventMessageConfirm(json) && mode !== 'all') {
 							const removedMessage = remove(results.loggedMessages, (e) => e.id === json.confirm);
@@ -211,11 +212,84 @@ export class MessageEventBusLogWriter {
 		return results;
 	}
 
+	async getMessagesByExecutionId(
+		executionId: string,
+		logHistory?: number,
+	): Promise<EventMessageTypes[]> {
+		const result: EventMessageTypes[] = [];
+		const logCount = logHistory
+			? Math.min(config.get('eventBus.logWriter.keepLogCount') as number, logHistory)
+			: (config.get('eventBus.logWriter.keepLogCount') as number);
+		for (let i = 0; i < logCount; i++) {
+			const logFileName = await MessageEventBusLogWriter.instance.getThread()?.getLogFileName(i);
+			if (logFileName) {
+				result.push(...(await this.readFromFileByExecutionId(executionId, logFileName)));
+			}
+		}
+		return result.sort((a, b) => a.ts.diff(b.ts).toMillis());
+	}
+
+	async readFromFileByExecutionId(
+		executionId: string,
+		logFileName: string,
+	): Promise<EventMessageTypes[]> {
+		const messages: EventMessageTypes[] = [];
+		if (logFileName && existsSync(logFileName)) {
+			try {
+				const rl = readline.createInterface({
+					input: createReadStream(logFileName),
+					crlfDelay: Infinity,
+				});
+				rl.on('line', (line) => {
+					try {
+						const json = jsonParse(line);
+						if (
+							isEventMessageOptions(json) &&
+							json.__type !== undefined &&
+							json.payload?.executionId === executionId
+						) {
+							const msg = getEventMessageObjectByType(json);
+							if (msg !== null) messages.push(msg);
+						}
+					} catch {
+						LoggerProxy.error(
+							`Error reading line messages from file: ${logFileName}, line: ${line}`,
+						);
+					}
+				});
+				// wait for stream to finish before continue
+				await eventOnce(rl, 'close');
+			} catch {
+				LoggerProxy.error(`Error reading logged messages from file: ${logFileName}`);
+			}
+		}
+		return messages;
+	}
+
+	async getMessagesAll(): Promise<EventMessageTypes[]> {
+		return (await this.getMessages('all')).loggedMessages;
+	}
+
 	async getMessagesSent(): Promise<EventMessageTypes[]> {
-		return this.getMessages('sent');
+		return (await this.getMessages('sent')).sentMessages;
 	}
 
 	async getMessagesUnsent(): Promise<EventMessageTypes[]> {
-		return this.getMessages('unsent');
+		return (await this.getMessages('unsent')).loggedMessages;
+	}
+
+	async getUnfinishedExecutions(): Promise<Set<string>> {
+		return (await this.getMessages('unfinished')).unfinishedExecutions;
+	}
+
+	async getUnsentAndUnfinishedExecutions(): Promise<{
+		unsentMessages: EventMessageTypes[];
+		unfinishedExecutions: Set<string>;
+	}> {
+		const result = await this.getMessages('unsent');
+		return {
+			unsentMessages: result.loggedMessages,
+			unfinishedExecutions: result.unfinishedExecutions,
+		};
 	}
 }

packages/cli/src/eventbus/eventBusRoutes.ts

@@ -2,7 +2,6 @@
 /* eslint-disable @typescript-eslint/no-unsafe-member-access */
 /* eslint-disable @typescript-eslint/no-explicit-any */
 import express from 'express';
-import { ResponseHelper } from '..';
 import { isEventMessageOptions } from './EventMessageClasses/AbstractEventMessage';
 import { EventMessageGeneric } from './EventMessageClasses/EventMessageGeneric';
 import {
@@ -32,6 +31,7 @@ import {
 	MessageEventBusDestinationOptions,
 } from 'n8n-workflow';
 import { User } from '../databases/entities/User';
+import * as ResponseHelper from '@/ResponseHelper';
 
 export const eventBusRouter = express.Router();
 
@@ -83,11 +83,27 @@ eventBusRouter.get(
 					return eventBus.getEventsSent();
 				case 'unsent':
 					return eventBus.getEventsUnsent();
+				case 'unfinished':
+					return eventBus.getUnfinishedExecutions();
 				case 'all':
 				default:
+					return eventBus.getEventsAll();
 			}
 		}
-		return eventBus.getEvents();
+		return eventBus.getEventsAll();
+	}),
+);
+
+eventBusRouter.get(
+	'/execution/:id',
+	ResponseHelper.send(async (req: express.Request): Promise<any> => {
+		if (req.params?.id) {
+			let logHistory;
+			if (req.query?.logHistory) {
+				logHistory = parseInt(req.query.logHistory as string, 10);
+			}
+			return eventBus.getEventsByExecutionId(req.params.id, logHistory);
+		}
 	}),
 );
 

packages/cli/test/integration/eventbus.test.ts

@@ -64,17 +64,16 @@ const testSentryDestination: MessageEventBusDestinationSentryOptions = {
 
 async function cleanLogs() {
 	await eventBus.logWriter.getThread()?.cleanLogs();
-	const allMessages = await eventBus.getEvents('all');
+	const allMessages = await eventBus.getEventsAll();
 	expect(allMessages.length).toBe(0);
 }
 
-async function confirmIdsSentUnsent() {
+async function confirmIdsSentUnsent(id: string) {
-	const sent = await eventBus.getEvents('sent');
+	const sent = await eventBus.getEventsSent();
-	const unsent = await eventBus.getEvents('unsent');
+	const unsent = await eventBus.getEventsUnsent();
 	expect(sent.length).toBe(1);
-	expect(sent[0].id).toBe(testMessage.id);
+	expect(sent[0].id).toBe(id);
-	expect(unsent.length).toBe(1);
+	expect(unsent.length).toBe(0);
-	expect(unsent[0].id).toBe(testMessageUnsubscribed.id);
 }
 
 const testMessage = new EventMessageGeneric({ eventName: 'n8n.test.message' });
@@ -139,14 +138,14 @@ test('should have a running logwriter process', async () => {
 
 test('should have a clean log', async () => {
 	await eventBus.logWriter.getThread()?.cleanLogs();
-	const allMessages = await eventBus.getEvents('all');
+	const allMessages = await eventBus.getEventsAll();
 	expect(allMessages.length).toBe(0);
 });
 
 test('should have logwriter log messages', async () => {
 	await eventBus.send(testMessage);
-	const sent = await eventBus.getEvents('sent');
+	const sent = await eventBus.getEventsSent();
-	const unsent = await eventBus.getEvents('unsent');
+	const unsent = await eventBus.getEventsUnsent();
 	expect(sent.length).toBeGreaterThan(0);
 	expect(unsent.length).toBe(0);
 	expect(sent.find((e) => e.id === testMessage.id)).toEqual(testMessage);
@@ -209,11 +208,38 @@ test('should send message to syslog ', async () => {
 	});
 
 	await eventBus.send(testMessage);
+
+	await new Promise((resolve) => setTimeout(resolve, 100));
+	expect(mockedSyslogClientLog).toHaveBeenCalled();
+	await confirmIdsSentUnsent(testMessage.id);
+
+	syslogDestination.disable();
+});
+
+test('should confirm send message if there are no subscribers', async () => {
+	config.set('enterprise.features.logStreaming', true);
+	await cleanLogs();
+
+	const syslogDestination = eventBus.destinations[
+		testSyslogDestination.id!
+	] as MessageEventBusDestinationSyslog;
+
+	syslogDestination.enable();
+
+	const mockedSyslogClientLog = jest.spyOn(syslogDestination.client, 'log');
+	mockedSyslogClientLog.mockImplementation((_m, _options, _cb) => {
+		eventBus.confirmSent(testMessage, {
+			id: syslogDestination.id,
+			name: syslogDestination.label,
+		});
+		return syslogDestination.client;
+	});
+
 	await eventBus.send(testMessageUnsubscribed);
 
 	await new Promise((resolve) => setTimeout(resolve, 100));
 	expect(mockedSyslogClientLog).toHaveBeenCalled();
-	await confirmIdsSentUnsent();
+	await confirmIdsSentUnsent(testMessageUnsubscribed.id);
 
 	syslogDestination.disable();
 });
@@ -266,10 +292,9 @@ test('should send message to webhook ', async () => {
 	mockedAxios.request.mockResolvedValue({ status: 200, data: { msg: 'OK' } });
 
 	await eventBus.send(testMessage);
-	await eventBus.send(testMessageUnsubscribed);
 	// not elegant, but since communication happens through emitters, we'll wait for a bit
 	await new Promise((resolve) => setTimeout(resolve, 100));
-	await confirmIdsSentUnsent();
+	await confirmIdsSentUnsent(testMessage.id);
 
 	webhookDestination.disable();
 });
@@ -294,11 +319,10 @@ test('should send message to sentry ', async () => {
 	});
 
 	await eventBus.send(testMessage);
-	await eventBus.send(testMessageUnsubscribed);
 	// not elegant, but since communication happens through emitters, we'll wait for a bit
 	await new Promise((resolve) => setTimeout(resolve, 100));
 	expect(mockedSentryCaptureMessage).toHaveBeenCalled();
-	await confirmIdsSentUnsent();
+	await confirmIdsSentUnsent(testMessage.id);
 
 	sentryDestination.disable();
 });

packages/editor-ui/src/Interface.ts

@@ -37,6 +37,7 @@ import {
 	INodeListSearchItems,
 	NodeParameterValueType,
 	INodeActionTypeDescription,
+	IAbstractEventMessage,
 } from 'n8n-workflow';
 import { FAKE_DOOR_FEATURES } from './constants';
 import { BulkCommand, Undoable } from '@/models/history';
@@ -236,6 +237,7 @@ export interface IRestApi {
 	retryExecution(id: string, loadWorkflow?: boolean): Promise<boolean>;
 	getTimezones(): Promise<IDataObject>;
 	getBinaryUrl(dataPath: string, mode: 'view' | 'download'): string;
+	getExecutionEvents(id: string): Promise<IAbstractEventMessage[]>;
 }
 
 export interface INodeTranslationHeaders {

packages/editor-ui/src/mixins/restApi.ts

@@ -19,6 +19,7 @@ import {
 	INodeTranslationHeaders,
 } from '@/Interface';
 import {
+	IAbstractEventMessage,
 	IDataObject,
 	ILoadOptions,
 	INodeCredentials,
@@ -203,6 +204,11 @@ export const restApi = Vue.extend({
 				// Binary data
 				getBinaryUrl: (dataPath, mode): string =>
 					self.rootStore.getRestApiContext.baseUrl + `/data/${dataPath}?mode=${mode}`,
+
+				// Returns all the available timezones
+				getExecutionEvents: (id: string): Promise<IAbstractEventMessage[]> => {
+					return self.restApi().makeRestApiRequest('GET', '/eventbus/execution/' + id);
+				},
 			};
 		},
 	},

packages/editor-ui/src/plugins/i18n/locales/en.json

@@ -459,6 +459,7 @@
 	"executionsList.showError.refreshData.title": "Problem loading data",
 	"executionsList.showError.retryExecution.title": "Problem with retry",
 	"executionsList.showError.stopExecution.title": "Problem stopping execution",
+	"executionsList.showError.getExecutionEvents.title": "Problem fetching execution events",
 	"executionsList.showMessage.handleDeleteSelected.title": "Execution deleted",
 	"executionsList.showMessage.retrySuccessfulFalse.title": "Retry unsuccessful",
 	"executionsList.showMessage.retrySuccessfulTrue.title": "Retry successful",

packages/workflow/src/MessageEventBus.ts

@@ -1,3 +1,4 @@
+import { DateTime } from 'luxon';
 import { INodeCredentials } from './Interfaces';
 
 // ===============================
@@ -7,7 +8,6 @@ import { INodeCredentials } from './Interfaces';
 export enum EventMessageTypeNames {
 	generic = '$$EventMessage',
 	audit = '$$EventMessageAudit',
-	user = '$$EventMessageUser',
 	confirm = '$$EventMessageConfirm',
 	workflow = '$$EventMessageWorkflow',
 	node = '$$EventMessageNode',
@@ -20,6 +20,25 @@ export enum MessageEventBusDestinationTypeNames {
 	syslog = '$$MessageEventBusDestinationSyslog',
 }
 
+// ===============================
+// Event Message Interfaces
+// ===============================
+
+export interface IAbstractEventMessage {
+	__type: EventMessageTypeNames;
+
+	id: string;
+
+	ts: DateTime;
+
+	eventName: string;
+
+	message: string;
+
+	// eslint-disable-next-line @typescript-eslint/no-explicit-any
+	payload: any;
+}
+
 // ===============================
 // Event Destination Interfaces
 // ===============================