fix: error handle server listen promise

Signed-off-by: naseemkullah <[email protected]>
open-telemetry · Jan 25, 2021 · 8021341 · 8021341
1 parent 5a82115
commit 8021341
Showing 1 changed file with 2 additions and 2 deletions.
diff --git a/packages/opentelemetry-exporter-prometheus/src/PrometheusExporter.ts b/packages/opentelemetry-exporter-prometheus/src/PrometheusExporter.ts
@@ -36,7 +36,7 @@ export class PrometheusExporter implements MetricExporter {
   };
 
   private readonly _logger: api.Logger;
-  private readonly _host: string;
+  private readonly _host?: string;
   private readonly _port: number;
   private readonly _endpoint: string;
   private readonly _server: Server;
@@ -74,7 +74,7 @@ export class PrometheusExporter implements MetricExporter {
     ).replace(/^([^/])/, '/$1');
 
     if (config.preventServerStart !== true) {
-      this.startServer().then(callback);
+      this.startServer().then(callback).catch(err => this._logger.error(err));
     } else if (callback) {
       callback();
     }