From ef0ea2ace26f328c9738bed60b7600c21877e933 Mon Sep 17 00:00:00 2001
From: Henry Oswald <henry.oswald@sharelatex.com>
Date: Thu, 20 Nov 2014 11:09:44 +0000
Subject: [PATCH] if redis fails once mark it to always fail

---
 libraries/redis-wrapper/index.coffee | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/libraries/redis-wrapper/index.coffee b/libraries/redis-wrapper/index.coffee
index fa85c9f457..386765af38 100644
--- a/libraries/redis-wrapper/index.coffee
+++ b/libraries/redis-wrapper/index.coffee
@@ -25,6 +25,7 @@ module.exports = RedisSharelatex =
 		sub = RedisSharelatex.createClient(connectionInfo)
 		pub = RedisSharelatex.createClient(connectionInfo)
 		
+		redisIsOk = true
 		heartbeatInterval = 2000 #ms
 		isAliveTimeout = 10000 #ms
 		
@@ -45,8 +46,11 @@ module.exports = RedisSharelatex =
 
 		isAlive = ->
 			timeSinceLastHeartbeat = Date.now() - lastHeartbeat
-			if timeSinceLastHeartbeat > isAliveTimeout
+			if !redisIsOk
+				return false
+			else if timeSinceLastHeartbeat > isAliveTimeout
 				console.error "heartbeat from redis timed out"
+				redisIsOk = false
 				return false
 			else
 				return true