Http OpenTSDB中的分块请求是什么？

我使用Qt4将一些数据点发布到OpenTSDB服务器，该服务器不支持分块HTTP请求

代码基本上是这样的：

QNetworkRequest request(m_url);
request.setHeader(QNetworkRequest::ContentTypeHeader, QString("application/json"));
request.setHeader(QNetworkRequest::ContentLengthHeader, jsonRequest.toAscii().size());
m_networkAccessManager.post(request, jsonRequest.toAscii());

jsonRequest是一个包含数据点的QString。此代码会不时被调用以将数据上载到服务器，并且通常工作正常。然而，有时我从openTSDB收到一个错误，指出“不支持分块请求”。 当请求变得更大时（更大，我指的是一些KB的数据），似乎就会发生这种情况

编辑： 当问题出现时，我对请求进行了tcpdump，事实上它没有被分块：

POST /api/put HTTP/1.1
Content-Type: application/json
Content-Length: 14073
Connection: Keep-Alive
Accept-Encoding: gzip
Accept-Language: en,*
User-Agent: Mozilla/5.0
Host: 192.168.xx.xxx:xxxx

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400 Bad Request
Content-Length: 1080
Content-Type: text/html; charset=UTF-8
Date: Thu, 08 Jan 2015 17:18:43 GMT

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html><head><meta http-equiv=content-type content="text/html;charset=utf-8"><title>Bad Request</title>
<style><!--
body{font-family:arial,sans-serif;margin-left:2em}A.l:link{color:#6f6f6f}A.u:link{color:green}.subg{background-color:#e2f4f7}.fwf{font-family:monospace;white-space:pre-wrap}//--></style></head>
<body text=#000000 bgcolor=#ffffff><table border=0 cellpadding=2 cellspacing=0 width=100%><tr><td rowspan=3 width=1% nowrap><b><font color=#c71a32 size=10>T</font><font color=#00a189 size=10>S</font><font color=#1a65b7 size=10>D</font>&nbsp;&nbsp;</b><td>&nbsp;</td></tr><tr><td class=subg><font color=#507e9b><b>Looks like it's your fault this time</b></td></tr><tr><td>&nbsp;</td></tr></table><blockquote><h1>Bad Request</h1>Sorry but your request was rejected as being invalid.<br/><br/>The reason provided was:<blockquote>Chunked request not supported.</blockquote></blockquote><table width=100% cellpadding=0 cellspacing=0><tr><td class=subg><img alt="" width=1 height=6></td></tr></table></body></html>

POST/api/put HTTP/1.1
内容类型：application/json
内容长度：14073
连接：保持活力
接受编码：gzip
接受语言：嗯*
用户代理：Mozilla/5.0
主机：192.168.xx.xxx:xxxx
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