From 0c61fc27b28da5c99b1bf8dd99db0c3e1fa5d6c4 Mon Sep 17 00:00:00 2001
From: Mayur Kale <mayurkale@google.com>
Date: Thu, 19 Sep 2019 12:45:18 -0700
Subject: [PATCH] feat(exporter-jaeger): flush data before shutdown (#282)

---
 packages/opentelemetry-exporter-jaeger/src/jaeger.ts | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/packages/opentelemetry-exporter-jaeger/src/jaeger.ts b/packages/opentelemetry-exporter-jaeger/src/jaeger.ts
index 55b28ba23ed..f6977c07f68 100644
--- a/packages/opentelemetry-exporter-jaeger/src/jaeger.ts
+++ b/packages/opentelemetry-exporter-jaeger/src/jaeger.ts
@@ -55,7 +55,15 @@ export class JaegerExporter implements SpanExporter {
 
   /** Shutdown exporter. */
   shutdown(): void {
-    this._sender.close();
+    this._sender.flush((numSpans: number, err?: string) => {
+      if (err) {
+        this._logger.error(`failed to flush span: ${err}`);
+      }
+    });
+    // Sleeping 2 seconds before closing the sender's connection to ensure all spans are flushed.
+    setTimeout(() => {
+      this._sender.close();
+    }, 2000);
   }
 
   /** Transform spans and sends to Jaeger service. */