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From: Mahesh Mattepu <Mahesh.Mattepu@igindex.co.uk>
To: 'HttpClient User Discussion' <httpclient-users@hc.apache.org>
Date: Mon, 14 Feb 2011 11:00:24 +0000
Subject: SocketException in HttpClient GET
Thread-Topic: SocketException in HttpClient GET
Thread-Index: AcvJHxpKtFZfcId3QBqGP44P0s2/EgC9tjeAAAgGO2AAABINEA==
Message-ID: 
 <8B0157917A711145812458934B12F1200C0C436521@PRDEXC102.igi.ig.local>
References: 
 <8B0157917A711145812458934B12F1200C0C43651A@PRDEXC102.igi.ig.local>
 <8B0157917A711145812458934B12F1200C0C436520@PRDEXC102.igi.ig.local>
In-Reply-To: 
 <8B0157917A711145812458934B12F1200C0C436520@PRDEXC102.igi.ig.local>
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Hi,

We are trying to solve a very simple problem for *HttpClient4* -- SocketExc=
eption for HTTP GET. HttpClient4 gets the first "chunk" of data from server=
 (Tomcat-6.0.18) and then the server unexpectedly closes the connection.

We tried the following HttpClient4 versions to fix this but it did not work=
!
- 4.1-beta1
- 4.1-alpha2
- 4.1-alpha1
- 4.0.3
- 4.0.2
- 4.0.1
The same piece of code works with HttpClient3.

Do you know if HTTP GET has any known bugs for HttpClient4? We could not fi=
nd any on the internet.

The debug logs report the following:
Sending request: GET /layouts/xxxxx?websiteId=3Dxxx&userId=3Dxxxxx HTTP/1.1=
 org.apache.http.wire - >> "GET /layouts/xxxxx?websiteId=3Dxxx&userId=3Dxxx=
xx HTTP/1.1[EOL]"
org.apache.http.wire - >> "Accept: application/json[EOL]"
org.apache.http.wire - >> "Host: xxx-xxxx.xxxxxxx.xxxxx[EOL]"
[note]
org.apache.http.wire - >> "Connection: Keep-Alive[EOL]"
org.apache.http.wire - >> "[EOL]"
org.apache.http.headers - >> GET /layouts/xxxxx?websiteId=3Dxxx&userId=3Dxx=
xxx HTTP/1.1 org.apache.http.headers - >> Accept: application/json org.apac=
he.http.headers - >> Host: xxx-xxxx.xxxxxxx.xxxxx [note] org.apache.http.he=
aders - >> Connection: Keep-Alive org.apache.http.wire - << "HTTP/1.1 200 O=
K[EOL]"
org.apache.http.wire - << "Date: Wed, 09 Feb 2011 09:53:15 GMT[EOL]"
org.apache.http.wire - << "Server: Apache-Coyote/1.1[EOL]"
org.apache.http.wire - << "Cache-Control: public, max-age=3D31536000000[EOL=
]"
org.apache.http.wire - << "Expires: Thu, 09 Feb 2012 09:53:15 GMT[EOL]"
org.apache.http.wire - << "Content-Type: application/json;charset=3Dutf-8[E=
OL]"
org.apache.http.wire - << "Content-Language: en-GB[EOL]"
org.apache.http.wire - << "Content-Length: 7506[EOL]"
[note]
org.apache.http.wire - << "Connection: close[EOL]"
org.apache.http.wire - << "[EOL]"
org.apache.http.impl.conn.DefaultClientConnection - Receiving response: HTT=
P/1.1 200 OK org.apache.http.headers - << HTTP/1.1 200 OK org.apache.http.h=
eaders - << Date: Wed, 09 Feb 2011 09:53:15 GMT org.apache.http.headers - <=
< Server: Apache-Coyote/1.1 org.apache.http.headers - << Cache-Control: pub=
lic, max-age=3D31536000000 org.apache.http.headers - << Expires: Thu, 09 Fe=
b 2012 09:53:15 GMT org.apache.http.headers - << Content-Type: application/=
json;charset=3Dutf-8 org.apache.http.headers - << Content-Language: en-GB o=
rg.apache.http.headers - << Content-Length: 7506 [note] org.apache.http.hea=
ders - << Connection: close uk.co.igindex.springrest.client.RequestProxyImp=
l - Http call return status code=3D200 [note] org.apache.http.impl.conn.Def=
aultClientConnection - Connection shut down org.apache.http.impl.conn.tsccm=
.ThreadSafeClientConnManager - Released connection is not reusable.
org.apache.http.impl.conn.tsccm.ConnPoolByRoute - Releasing connection [Htt=
pRoute[{}->http://xxx-xxx.xxx.xxxxx]][null]
StopsServer:2011-02-09 09:53:15,616 [main] DEBUG org.apache.http.impl.conn.=
tsccm.ConnPoolByRoute - Notifying no-one, there are no waiting threads
Content-length: 7506
org.apache.http.wire - << "{"
org.apache.http.wire - << """
org.apache.http.wire - << "i"
...
[logs removed for partial response content]
---

We are reading the response in the standard way:
StringBuilder sb =3D new StringBuilder();
try {
   BufferedReader br =3D new BufferedReader(new InputStreamReader(inputStre=
am));
   char[] buf =3D new char[4 * 1024]; // 4Kchar buffer
   int len;
   while ((len =3D br.read(buf, 0, buf.length)) !=3D -1) {
      sb.append(buf, 0, len);
   }
   br.close();
   } finally {
      ...
   }
---

Thanks & Regards
Mahesh


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