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From bugzi...@apache.org
Subject DO NOT REPLY [Bug 48315] New: End of file found: proxy: error reading status line from remote server localhost
Date Tue, 01 Dec 2009 09:52:11 GMT
https://issues.apache.org/bugzilla/show_bug.cgi?id=48315

           Summary: End of file found: proxy: error reading status line
                    from remote server localhost
           Product: Apache httpd-2
           Version: 2.2.9
          Platform: PC
        OS/Version: Linux
            Status: NEW
          Severity: normal
          Priority: P2
         Component: mod_proxy
        AssignedTo: bugs@httpd.apache.org
        ReportedBy: silicium@natural-geek.org


mod_proxy connectionproblems like [37770]

Environment:

- Connections comes from a properitary Loadbalancer.
- No SSL on the Machines
- Apache 2.2.9-10 (Debian Lenny)
- Apache2 with mod_proxy and proxy_http enabled vhost
...
       ProxyPass / http://localhost:8080/
       ProxyPassReverse / http://localhost:8080/
...

on 8080 runs a tomcat-6.0.18


Short Description:


Around 2-4 times a day, mod_proxy will close the connection and return a
HTTP/Bad_Gateway.

also i benched our Stagingsystem with ApacheBench 1'000'000 Connections, 1000
Parallel was no Problem for the System and the Problem could not be reproduced.

Of course, Tomcat works fine and there are no errors or connection problems.


[Mon Nov 30 12:50:38 2009] [error] [client x.x.x.x] (70014)End of file found:
proxy: error reading status line from remote server localhost, referer:
http://foo.bar

[Mon Nov 30 12:50:38 2009] [error] [client x.x.x.x] proxy: Error reading from
remote server returned by /LandingsGoogle.action, referer: http://foo.bar

----------




Debug Log Output:




[Mon Nov 30 12:50:37 2009] [debug] mod_proxy_http.c(1710): proxy: start body
send
[Mon Nov 30 12:50:37 2009] [debug] mod_headers.c(740): headers:
ap_headers_output_filter()
[Mon Nov 30 12:50:37 2009] [debug] mod_deflate.c(632): [client x.x.x.x] Zlib:
Compressed 19277 to 5278 : URL /foo/bar
[Mon Nov 30 12:50:37 2009] [debug] mod_proxy_http.c(1803): proxy: end body send
[Mon Nov 30 12:50:37 2009] [debug] proxy_util.c(2008): proxy: HTTP: has
released connection for (localhost)
[Mon Nov 30 12:50:38 2009] [debug] mod_proxy_http.c(60): proxy: HTTP:
canonicalising URL //localhost:8080/Index.action
[Mon Nov 30 12:50:38 2009] [debug] proxy_util.c(1488): [client x.x.x.x] proxy:
http: found worker http://localhost:8080/ for
http://localhost:8080/Index.action?foo_bar
[Mon Nov 30 12:50:38 2009] [debug] mod_proxy.c(966): Running scheme http
handler (attempt 0)
[Mon Nov 30 12:50:38 2009] [debug] mod_proxy_ajp.c(575): proxy: AJP: declining
URL http://localhost:8080/Index.action?foo_bar
[Mon Nov 30 12:50:38 2009] [debug] mod_proxy_http.c(1937): proxy: HTTP: serving
URL http://localhost:8080/Index.action?foo_bar
[Mon Nov 30 12:50:38 2009] [debug] proxy_util.c(1990): proxy: HTTP: has
acquired connection for (localhost)
[Mon Nov 30 12:50:38 2009] [debug] proxy_util.c(2046): proxy: connecting
http://localhost:8080/Index.action?foo_bar to localhost:8080
[Mon Nov 30 12:50:38 2009] [debug] proxy_util.c(2139): proxy: connected
/Index.action?foo_bar to localhost:8080
[Mon Nov 30 12:50:38 2009] [debug] mod_proxy_http.c(1710): proxy: start body
send
[Mon Nov 30 12:50:38 2009] [debug] mod_headers.c(740): headers:
ap_headers_output_filter()
[Mon Nov 30 12:50:38 2009] [debug] mod_proxy_http.c(1803): proxy: end body send
[Mon Nov 30 12:50:38 2009] [debug] proxy_util.c(2008): proxy: HTTP: has
released connection for (localhost)
[Mon Nov 30 12:50:38 2009] [error] [client x.x.x.x] (70014)End of file found:
proxy: error reading status line from remote server localhost, referer:
http://www.foo.bar/fnord?some_variables_and_awesome_stuff
[Mon Nov 30 12:50:38 2009] [debug] mod_proxy_http.c(1439): [client
92.116.109.83] proxy: NOT Closing connection to client although reading from
backend server localhost failed., referer:
http://www.foo.bar/fnord?some_variables_and_awesome_stuff
[Mon Nov 30 12:50:38 2009] [error] [client x.x.x.x] proxy: Error reading from
remote server returned by /foobar.action, referer:
http://www.foo.bar/fnord?some_variables_and_awesome_stuff
[Mon Nov 30 12:50:38 2009] [debug] proxy_util.c(2008): proxy: HTTP: has
released connection for (localhost)
[Mon Nov 30 12:50:38 2009] [debug] mod_headers.c(740): headers:
ap_headers_output_filter()
[Mon Nov 30 12:50:38 2009] [debug] mod_headers.c(740): headers:
ap_headers_output_filter()
[Mon Nov 30 12:50:38 2009] [debug] mod_headers.c(740): headers:
ap_headers_output_filter()
[Mon Nov 30 12:50:38 2009] [debug] mod_deflate.c(632): [client x.x.x.x] Zlib:
Compressed 3075 to 1198 : URL /error/HTTP_BAD_GATEWAY.html.var, referer:
http://www.foo.bar/fnord

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