Hi, We use Squid 3.1.20. We are often exposed to a problem which return a "Zero Sized Error". Can i fix it with some options on the squid configuration file ? I tried all of things mentioned after : - Delete or rename your cookie file and configure your browser to prompt you before accepting any new cookies. - Disable HTTP persistent connections with the server_persistent_connections and client_persistent_connections directives. - Disable any advanced TCP features on the Squid system. Disable ECN on Linux with echo 0 > /proc/sys/net/ipv4/tcp_ecn/. I will try to find the origin of the problem with a tcpdump on my proxy my i don't known how could i exploit it. This is the result of the TCP stream between my proxy and the website : GET / HTTP/1.1 Host: www.mopub.com User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/20100101 Firefox/17.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Via: 1.1 localhost (squid/3.1.20) X-Forwarded-For: 192.168.1.137 Cache-Control: max-age=259200 Connection: keep-alive And between the proxy and the client : GET http://www.mopub.com/ HTTP/1.1 Host: www.mopub.com User-Agent: Mozilla/5.0 (Windows NT 6.1; rv:17.0) Gecko/20100101 Firefox/17.0 Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Language: en-US,en;q=0.5 Accept-Encoding: gzip, deflate Proxy-Connection: keep-alive HTTP/1.0 502 Bad Gateway Server: squid/3.1.20 Mime-Version: 1.0 Date: Wed, 16 Jan 2013 15:41:51 GMT Content-Type: text/html Content-Length: 3335 X-Squid-Error: ERR_ZERO_SIZE_OBJECT 0 Vary: Accept-Language Content-Language: en-us X-Cache: MISS from localhost X-Cache-Lookup: MISS from localhost:3128 Via: 1.0 localhost (squid/3.1.20) Connection: keep-alive <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd";> <html><head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8"> <title>ERROR: The requested URL could not be retrieved</title> <style type="text/css"><!-- /* Stylesheet for Squid Error pages Adapted from design by Free CSS Templates http://www.freecsstemplates.org Released for free under a Creative Commons Attribution 2.5 License */ /* Page basics */ * { .font-family: verdana, sans-serif; } html body { .margin: 0; .padding: 0; .background: #efefef; .font-size: 12px; .color: #1e1e1e; } /* Page displayed title area */ #titles { .margin-left: 15px; .padding: 10px; .padding-left: 100px; .background: url('http://www.squid-cache.org/Artwork/SN.png') no-repeat left; } /* initial title */ #titles h1 { .color: #000000; } #titles h2 { .color: #000000; } /* special event: FTP success page titles */ #titles ftpsuccess { .background-color:#00ff00; .width:100%; } /* Page displayed body content area */ #content { .padding: 10px; .background: #ffffff; } /* General text */ p { } /* error brief description */ #error p { } /* some data which may have caused the problem */ #data { } /* the error message received from the system or other software */ #sysmsg { } pre { font-family:sans-serif; } /* special event: FTP / Gopher directory listing */ #dirmsg { font-family: courier; color: black; font-size: 10pt; } #dirlisting { margin-left: 2%; margin-right: 2%; } #dirlisting tr.entry td.icon,td.filename,td.size,td.date { border-bottom: groove; } #dirlisting td.size { width: 50px; text-align: right; padding-right: 5px; } /* horizontal lines */ hr { .margin: 0; } /* page displayed footer area */ #footer { .font-size: 9px; .padding-left: 10px; } body :lang(fa) { direction: rtl; font-size: 100%; font-family: Tahoma, Roya, sans-serif; float: right; } :lang(he) { direction: rtl; } --></style> </head><body id=ERR_ZERO_SIZE_OBJECT> <div id="titles"> <h1>ERROR</h1> <h2>The requested URL could not be retrieved</h2> </div> <hr> <div id="content"> <p>The following error was encountered while trying to retrieve the URL: <a href="http://www.mopub.com/";>http://www.mopub.com/</a></p> <blockquote id="error"> <p><b>Zero Sized Reply</b></p> </blockquote> <p>Squid did not receive any data for this request.</p> <p>Your cache administrator is <a href="mailto:webmaster?subject=CacheErrorInfo%20-%20ERR_ZERO_SIZE_OBJECT&body=CacheHost%3A%20localhost%0D%0AErrPage%3A%20ERR_ZERO_SIZE_OBJECT%0D%0AErr%3A%20%5Bnone%5D%0D%0ATimeStamp%3A%20Wed,%2016%20Jan%202013%2015%3A41%3A51%20GMT%0D%0A%0D%0AClientIP%3A%20192.168.1.137%0D%0AServerIP%3A%20199.204.138.90%0D%0A%0D%0AHTTP%20Request%3A%0D%0AGET%20%2F%20HTTP%2F1.1%0AHost%3A%20www.mopub.com%0D%0AUser-Agent%3A%20Mozilla%2F5.0%20(Windows%20NT%206.1%3B%20rv%3A17.0)%20Gecko%2F20100101%20Firefox%2F17.0%0D%0AAccept%3A%20text%2Fhtml,application%2Fxhtml+xml,application%2Fxml%3Bq%3D0.9,*%2F*%3Bq%3D0.8%0D%0AAccept-Language%3A%20en-US,en%3Bq%3D0.5%0D%0AAccept-Encoding%3A%20gzip,%20deflate%0D%0AProxy-Connection%3A%20keep-alive%0D%0A%0D%0A%0D%0A">webmaster</a>.</p> <br> </div> <hr> <div id="footer"> <p>Generated Wed, 16 Jan 2013 15:41:51 GMT by localhost (squid/3.1.20)</p> <!-- ERR_ZERO_SIZE_OBJECT --> </div> </body></html> Regards, -- Bastien CERIANI
