Co to jest porowata prośba w OpenTSDB?

Question

Używam Qt4 do umieszczenia niektórych punktów danych na serwerze OpenTSDB, który nie obsługuje fragmentów żądań HTTP.

Kod jest w zasadzie tak:

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 jest QString zawierającym punkty danych. Kod ten jest od czasu do czasu wywoływany w celu przesyłania danych na serwer i zwykle działa dobrze. Czasami jednak pojawia się błąd z openTSDB stwierdzający, że "żądanie Chunked nie jest obsługiwane.". Wydaje się, że dzieje się to, gdy prośba staje się nieco większa (i przez większą, mam na myśli trochę KB danych).

edit: Zrobiłem tcpdump wniosku, gdy powstaje problem, a właściwie nie widać, aby być pofragmentowane:

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> 

Myślałam Qt zmieniał używanie pakietowego żądanie, gdy prośba się zwiększyła, ale tak nie jest. Tak więc aktualne pytanie brzmi: co to jest porowata prośba w openTSDB?

Answer 1

W końcu znalazłem przyczynę, dla której uważam, że moja prośba jest zablokowana: OpenTSDB wewnętrznie używa Netty do tworzenia sieci, a jeśli Netty odczytuje blok, który nie zawiera kompletnego żądania, jest oznaczony jako zgrupowany, nawet jeśli nie ma Przeniesienie-Kodowanie nagłówka w żądaniu.

Istnieją dwa możliwe rozwiązania tego:

• dodając „tsd.http.request.enable_chunked = true” do pliku konfiguracyjnego, tak, że nie odrzuca żądania zostały podzielone na porcje i dodając „tsd.http .request.max_chunk = "do pliku konfiguracyjnego, ustawiając ją na rozsądny rozmiar dla wniosków
• Jeśli można zmienić klienta, zmusić go do wysyłania mniejsze wnioski

Należy pamiętać, że włączenie żądania zostały podzielone na porcje publiczne serwery stojące nie mogą być dobrym pomysłem, jak ma błędny klient może wysyłać nieograniczone żądania, przeciążając serwer.

Kredyty idzie do użytkowników IRC jaylr i manolama, który dostarczył mi informacji na kanale IRC#opentsdb@freenode.net