From f077c337ec30b7a51eef09a9282ae9c547573414 Mon Sep 17 00:00:00 2001
From: Brian Gough <brian.gough@overleaf.com>
Date: Thu, 11 Jun 2020 10:54:26 +0100
Subject: [PATCH] send 503 unavailable response on EPIPE

---
 app.js | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/app.js b/app.js
index 319799a..b22e0a0 100644
--- a/app.js
+++ b/app.js
@@ -230,6 +230,9 @@ app.use(function(error, req, res, next) {
   if (error instanceof Errors.NotFoundError) {
     logger.warn({ err: error, url: req.url }, 'not found error')
     return res.sendStatus(404)
+  } else if (error.code === 'EPIPE') {
+    // inspect container returns EPIPE when shutting down
+    return res.sendStatus(503) // send 503 Unavailable response
   } else {
     logger.error({ err: error, url: req.url }, 'server error')
     return res.sendStatus((error != null ? error.statusCode : undefined) || 500)