From 25523d1985639712c23078ef25e83a2faec9f1b7 Mon Sep 17 00:00:00 2001
From: Xin Yan <xinyan@microsoft.com>
Date: Thu, 25 Oct 2018 22:21:27 -0700
Subject: [PATCH] fix a race condition. (#212)

when multiple call to GetStream happens around the same time, on the
same inputIndex, a race condition will cause this.buffers.Add() to throw
exception.
---
 src/KubernetesClient/StreamDemuxer.cs | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/KubernetesClient/StreamDemuxer.cs b/src/KubernetesClient/StreamDemuxer.cs
index 79222fd..e29827f 100644
--- a/src/KubernetesClient/StreamDemuxer.cs
+++ b/src/KubernetesClient/StreamDemuxer.cs
@@ -98,9 +98,9 @@ namespace k8s
         /// </returns>
         public Stream GetStream(byte? inputIndex, byte? outputIndex)
         {
-            if (inputIndex != null && !this.buffers.ContainsKey(inputIndex.Value))
+            lock (this.buffers)
             {
-                lock (this.buffers)
+                if (inputIndex != null && !this.buffers.ContainsKey(inputIndex.Value))
                 {
                     var buffer = new ByteBuffer();
                     this.buffers.Add(inputIndex.Value, buffer);