From 93b32526fe426efbf7b0a45d0f2e3b8ac02eccf7 Mon Sep 17 00:00:00 2001
From: dapengzhang0 <zdapeng@google.com>
Date: Mon, 13 Nov 2017 15:33:53 -0800
Subject: [PATCH] netty: fix server keepalive unexpected ping ack

---
 netty/src/main/java/io/grpc/netty/NettyServerHandler.java | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/netty/src/main/java/io/grpc/netty/NettyServerHandler.java b/netty/src/main/java/io/grpc/netty/NettyServerHandler.java
index 79b10236227..17ec63c4c47 100644
--- a/netty/src/main/java/io/grpc/netty/NettyServerHandler.java
+++ b/netty/src/main/java/io/grpc/netty/NettyServerHandler.java
@@ -761,7 +761,8 @@ private final class KeepAlivePinger implements KeepAliveManager.KeepAlivePinger
     @Override
     public void ping() {
       ChannelFuture pingFuture = encoder().writePing(
-          ctx, false /* isAck */, KEEPALIVE_PING_BUF, ctx.newPromise());
+          // slice KEEPALIVE_PING_BUF because tls handler may modify the reader index
+          ctx, false /* isAck */, KEEPALIVE_PING_BUF.slice(), ctx.newPromise());
       ctx.flush();
       if (transportTracer != null) {
         pingFuture.addListener(new ChannelFutureListener() {