From 4fc6e57709fac3db8db7e2e8fec17bff31796ba8 Mon Sep 17 00:00:00 2001
From: Peter Boromissza <boromisp@users.noreply.github.com>
Date: Fri, 3 Nov 2017 16:01:14 +0100
Subject: [PATCH] Do not return broken connections to the idle pool

---
 index.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/index.js b/index.js
index af86134..392c346 100644
--- a/index.js
+++ b/index.js
@@ -24,7 +24,7 @@ function throwOnRelease () {
 
 function release (client, err) {
   client.release = throwOnRelease
-  if (err || this.ending) {
+  if (err || this.ending || client._do_not_return_) {
     this._remove(client)
     this._pulseQueue()
     return
@@ -181,6 +181,7 @@ class Pool extends EventEmitter {
         this.log('additional client error after disconnection due to error', err)
       })
       this._remove(client)
+      client._do_not_return_ = true;
       // TODO - document that once the pool emits an error
       // the client has already been closed & purged and is unusable
       this.emit('error', err, client)