Merge pull request #2861 from murgatroid99/grpc-js_handle_socket_close

grpc-js: Restore socket disconnect handling

Author: murgatroid99

packages/grpc-js/package.json

@@ -1,6 +1,6 @@
 {
   "name": "@grpc/grpc-js",
-  "version": "1.12.2",
+  "version": "1.12.3",
   "description": "gRPC Library for Node - pure JS implementation",
   "homepage": "https://grpc.io/",
   "repository": "https://github.com/grpc/grpc-node/tree/master/packages/grpc-js",

packages/grpc-js/src/transport.ts

@@ -227,6 +227,11 @@ class Http2Transport implements Transport {
       this.handleDisconnect();
     });
 
+    session.socket.once('close', () => {
+      this.trace('connection closed');
+      this.handleDisconnect();
+    });
+
     if (logging.isTracerEnabled(TRACER_NAME)) {
       session.on('remoteSettings', (settings: http2.Settings) => {
         this.trace(