From 93b970dc07f23dcfb85ac9b2f33635e48cef1f72 Mon Sep 17 00:00:00 2001
From: Iain Sproat <68657+iainsproat@users.noreply.github.com>
Date: Wed, 21 Aug 2024 13:54:00 +0100
Subject: [PATCH] fix(graphql websocket): keep alive websocket connections if
 idle (#2720)

- if no data is being sent on a websocket connection then it was closed by nginx after 60s
- it is assumed to be better to keep alive the connection than have the overhead of closing and re-establishing the connection every 60s
---
 packages/server/app.ts | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/packages/server/app.ts b/packages/server/app.ts
index 397f96599..41dc78a97 100644
--- a/packages/server/app.ts
+++ b/packages/server/app.ts
@@ -230,7 +230,8 @@ function buildApolloSubscriptionServer(
         }
 
         return baseParams
-      }
+      },
+      keepAlive: 30000 //milliseconds. Loadbalancers may close the connection after inactivity. e.g. nginx default is 60000ms.
     },
     {
       server,