From 23a052c1604734ea603fe06966eec50701620b5e Mon Sep 17 00:00:00 2001
From: Violeta Georgieva <vgeorgieva@pivotal.io>
Date: Mon, 24 Apr 2017 23:14:29 +0300
Subject: [PATCH] Clear the buffer provided by Undertow before reading the
 request

When reading more that once for a given request, the position/limit of
the buffer provided by Undertow should be reset in order to use the
full capacity of the buffer.
---
 .../http/server/reactive/UndertowServerHttpRequest.java          | 1 +
 1 file changed, 1 insertion(+)

diff --git a/spring-web/src/main/java/org/springframework/http/server/reactive/UndertowServerHttpRequest.java b/spring-web/src/main/java/org/springframework/http/server/reactive/UndertowServerHttpRequest.java
index f66b9ccbdcf..ff33f1bc2d6 100644
--- a/spring-web/src/main/java/org/springframework/http/server/reactive/UndertowServerHttpRequest.java
+++ b/spring-web/src/main/java/org/springframework/http/server/reactive/UndertowServerHttpRequest.java
@@ -146,6 +146,7 @@ public class UndertowServerHttpRequest extends AbstractServerHttpRequest {
 				this.pooledByteBuffer = this.byteBufferPool.allocate();
 			}
 			ByteBuffer byteBuffer = this.pooledByteBuffer.getBuffer();
+			byteBuffer.clear();
 			int read = this.channel.read(byteBuffer);
 			if (logger.isTraceEnabled()) {
 				logger.trace("read:" + read);