fix(sdk-node): lazy require @opentelemetry/exporter-jaeger

experimental/packages/opentelemetry-sdk-node/src/TracerProviderWithEnvExporter.ts

@@ -32,7 +32,6 @@ import { OTLPTraceExporter as OTLPProtoTraceExporter } from '@opentelemetry/expo
 import { OTLPTraceExporter as OTLPHttpTraceExporter } from '@opentelemetry/exporter-trace-otlp-http';
 import { OTLPTraceExporter as OTLPGrpcTraceExporter } from '@opentelemetry/exporter-trace-otlp-grpc';
 import { ZipkinExporter } from '@opentelemetry/exporter-zipkin';
-import { JaegerExporter } from '@opentelemetry/exporter-jaeger';
 
 export class TracerProviderWithEnvExporters extends NodeTracerProvider {
   private _configuredExporters: SpanExporter[] = [];
@@ -74,7 +73,23 @@ export class TracerProviderWithEnvExporters extends NodeTracerProvider {
   >([
     ['otlp', () => this.configureOtlp()],
     ['zipkin', () => new ZipkinExporter()],
-    ['jaeger', () => new JaegerExporter()],
+    [
+      'jaeger',
+      () => {
+        // The JaegerExporter does not support being required in bundled
+        // environments. By delaying the require statement to here, we only crash when
+        // the exporter is actually used in such an environment.
+        try {
+          // eslint-disable-next-line @typescript-eslint/no-var-requires
+          const { JaegerExporter } = require('@opentelemetry/exporter-jaeger');
+          return new JaegerExporter();
+        } catch (e) {
+          throw new Error(
+            `Could not instantiate JaegerExporter. This could be due to the JaegerExporter's lack of support for bundling. If possible, use @opentelemetry/exporter-trace-otlp-proto instead. Original Error: ${e}`
+          );
+        }
+      },
+    ],
     ['console', () => new ConsoleSpanExporter()],
   ]);
 

packages/opentelemetry-exporter-jaeger/README.md

@@ -9,6 +9,8 @@
 - `@opentelemetry/exporter-trace-otlp-grpc`
 - `@opentelemetry/exporter-trace-otlp-http`
 
+**NOTE: Bundling (with e.g. `webpack`, `rollup`, `esbuild`, ...) is not supported by this package. Please use `@opentelemetry/exporter-trace-otlp-proto` instead.**
+
 OpenTelemetry Jaeger Trace Exporter allows the user to send collected traces to Jaeger.
 
 [Jaeger](https://jaeger.readthedocs.io/en/latest/), inspired by [Dapper](https://research.google.com/pubs/pub36356.html) and [OpenZipkin](http://zipkin.io/), is a distributed tracing system released as open source by [Uber Technologies](http://uber.github.io/). It is used for monitoring and troubleshooting microservices-based distributed systems, including: