add legacy mode to jaeger tracing exporter to support 128bit trace ids

package.json

@@ -63,7 +63,6 @@
   "author": "MoleculerJS",
   "license": "MIT",
   "devDependencies": {
-    "@icebob/node-memwatch": "^2.1.0",
     "@sinonjs/fake-timers": "^9.1.2",
     "@types/bunyan": "^1.8.11",
     "@types/ioredis": "^4.28.10",

src/tracing/exporters/jaeger.js

@@ -1,6 +1,6 @@
 /*
  * moleculer
- * Copyright (c) 2020 MoleculerJS (https://github.com/moleculerjs/moleculer)
+ * Copyright (c) 2025 MoleculerJS (https://github.com/moleculerjs/moleculer)
  * MIT Licensed
  */
 
@@ -49,7 +49,10 @@ class JaegerTraceExporter extends BaseTraceExporter {
 			tracerOptions: {},
 
 			/** @type {Object?} Default span tags */
-			defaultTags: null
+			defaultTags: null,
+
+			/** @type {boolean?} Use legacy mode with 64 bit trace ids*/
+			legacyMode: true
 		});
 
 		this.tracers = {};
@@ -199,8 +202,8 @@ class JaegerTraceExporter extends BaseTraceExporter {
 		let parentCtx;
 		if (span.parentID) {
 			parentCtx = new Jaeger.SpanContext(
-				this.convertID(span.traceID), // traceId,
-				this.convertID(span.parentID), // spanId,
+				this.convertTraceID(span.traceID), // traceId,
+				this.convertSpanID(span.parentID), // spanId,
 				null, // parentId,
 				null, // traceIdStr
 				null, // spanIdStr
@@ -235,8 +238,8 @@ class JaegerTraceExporter extends BaseTraceExporter {
 		);
 
 		const sc = jaegerSpan.context();
-		sc.traceId = this.convertID(span.traceID);
-		sc.spanId = this.convertID(span.id);
+		sc.traceId = this.convertTraceID(span.traceID);
+		sc.spanId = this.convertSpanID(span.id);
 
 		if (span.error) {
 			this.addTags(jaegerSpan, Jaeger.opentracing.Tags.ERROR, true);
@@ -291,11 +294,27 @@ class JaegerTraceExporter extends BaseTraceExporter {
 	 * @param {String} id
 	 * @returns {String}
 	 */
-	convertID(id) {
+	convertSpanID(id) {
 		if (id) return Buffer.from(id.replace(/-/g, "").substring(0, 16), "hex");
 
 		return null;
 	}
+
+	/**
+	 * Convert Trace ID to Jaeger format. Return 128 bit IDs or 64 bit IDs if legacy is set.
+	 *
+	 * @param {String} id
+	 * @returns {String}
+	 */
+	convertTraceID(id) {
+		if (id)
+			return Buffer.from(
+				id.replace(/-/g, "").substring(0, this.opts.legacyMode ? 16 : 32),
+				"hex"
+			);
+
+		return null;
+	}
 }
 
 module.exports = JaegerTraceExporter;

test/unit/tracing/exporters/jaeger.spec.js

@@ -56,6 +56,7 @@ describe("Test Jaeger tracing exporter class", () => {
 					options: {}
 				},
 				tracerOptions: {},
+				legacyMode: true,
 				defaultTags: null
 			});
 
@@ -84,6 +85,7 @@ describe("Test Jaeger tracing exporter class", () => {
 				safetyTags: false,
 				endpoint: "http://jaeger:9411",
 				host: "127.0.0.1",
+				legacyMode: true,
 				port: 6832,
 				sampler: {
 					type: "Const",
@@ -481,22 +483,71 @@ describe("Test Jaeger tracing exporter class", () => {
 		});
 	});
 
-	describe("Test convertID method", () => {
+	describe("Test convert ids", () => {
 		const fakeTracer = { broker, logger: broker.logger };
-		const exporter = new JaegerTraceExporter({});
+		const legacyExporter = new JaegerTraceExporter({});
+		legacyExporter.init(fakeTracer);
+		const exporter = new JaegerTraceExporter({ legacyMode: false });
 		exporter.init(fakeTracer);
 
-		it("should truncate ID", () => {
-			expect(exporter.convertID()).toBeNull();
-			expect(exporter.convertID("")).toBeNull();
-			expect(exporter.convertID("12345678")).toEqual(Buffer.from([18, 52, 86, 120]));
-			expect(exporter.convertID("123456789-0123456")).toEqual(
+		it("should truncate trace ID to 64 bit in legacy mode", () => {
+			expect(legacyExporter.convertTraceID()).toBeNull();
+			expect(legacyExporter.convertTraceID("")).toBeNull();
+			expect(legacyExporter.convertTraceID("12345678")).toEqual(
+				Buffer.from([18, 52, 86, 120])
+			);
+			expect(legacyExporter.convertTraceID("123456789-0123456")).toEqual(
+				Buffer.from([18, 52, 86, 120, 144, 18, 52, 86])
+			);
+			expect(legacyExporter.convertTraceID("123456789-0123456789-abcdef")).toEqual(
 				Buffer.from([18, 52, 86, 120, 144, 18, 52, 86])
 			);
-			expect(exporter.convertID("123456789-0123456789-abcdef")).toEqual(
+			expect(legacyExporter.convertTraceID("abcdef")).toEqual(Buffer.from([171, 205, 239]));
+		});
+
+		it("should truncate trace ID to 128bit in non legacy mode", () => {
+			expect(exporter.convertTraceID()).toBeNull();
+			expect(exporter.convertTraceID("")).toBeNull();
+			expect(exporter.convertTraceID("12345678")).toEqual(Buffer.from([18, 52, 86, 120]));
+			expect(exporter.convertTraceID("123456789-0123456")).toEqual(
 				Buffer.from([18, 52, 86, 120, 144, 18, 52, 86])
 			);
-			expect(exporter.convertID("abcdef")).toEqual(Buffer.from([171, 205, 239]));
+			expect(exporter.convertTraceID("123456789-0123456789-abcdef-abcdef-abcdef")).toEqual(
+				Buffer.from([
+					18, 52, 86, 120, 144, 18, 52, 86, 120, 154, 188, 222, 250, 188, 222, 250
+				])
+			);
+			expect(exporter.convertTraceID("abcdef")).toEqual(Buffer.from([171, 205, 239]));
+		});
+
+		it("should truncate span ID to 64 bit", () => {
+			expect(legacyExporter.convertSpanID()).toBeNull();
+			expect(exporter.convertSpanID()).toBeNull();
+
+			expect(legacyExporter.convertSpanID("")).toBeNull();
+			expect(exporter.convertSpanID("")).toBeNull();
+
+			expect(legacyExporter.convertSpanID("12345678")).toEqual(
+				Buffer.from([18, 52, 86, 120])
+			);
+			expect(exporter.convertSpanID("12345678")).toEqual(Buffer.from([18, 52, 86, 120]));
+
+			expect(legacyExporter.convertSpanID("123456789-0123456")).toEqual(
+				Buffer.from([18, 52, 86, 120, 144, 18, 52, 86])
+			);
+			expect(exporter.convertSpanID("123456789-0123456")).toEqual(
+				Buffer.from([18, 52, 86, 120, 144, 18, 52, 86])
+			);
+
+			expect(legacyExporter.convertSpanID("123456789-0123456789-abcdef")).toEqual(
+				Buffer.from([18, 52, 86, 120, 144, 18, 52, 86])
+			);
+			expect(exporter.convertSpanID("123456789-0123456")).toEqual(
+				Buffer.from([18, 52, 86, 120, 144, 18, 52, 86])
+			);
+
+			expect(legacyExporter.convertSpanID("abcdef")).toEqual(Buffer.from([171, 205, 239]));
+			expect(exporter.convertSpanID("abcdef")).toEqual(Buffer.from([171, 205, 239]));
 		});
 	});