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From SpliFF <spl...@warriorhut.org>
Subject Re: [users@httpd] AJP proxy timeout problem
Date Sat, 29 Oct 2011 08:21:52 GMT
2.2.20 running on Gentoo 64-bit.

Server version: Apache/2.2.20 (Unix)
Server built:   Sep 22 2011 02:42:57
Server's Module Magic Number: 20051115:28
Server loaded:  APR 1.4.5, APR-Util 1.3.12
Compiled using: APR 1.4.5, APR-Util 1.3.12
Architecture:   64-bit
Server MPM:     Worker
  threaded:     yes (fixed thread count)
    forked:     yes (variable process count)
Server compiled with....
 -D APACHE_MPM_DIR="server/mpm/worker"
 -D APR_HAS_SENDFILE
 -D APR_HAS_MMAP
 -D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
 -D APR_USE_SYSVSEM_SERIALIZE
 -D APR_USE_PTHREAD_SERIALIZE
 -D APR_HAS_OTHER_CHILD
 -D AP_HAVE_RELIABLE_PIPED_LOGS
 -D DYNAMIC_MODULE_LIMIT=128
 -D HTTPD_ROOT="/usr"
 -D SUEXEC_BIN="/usr/sbin/suexec"
 -D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
 -D DEFAULT_ERRORLOG="logs/error_log"
 -D AP_TYPES_CONFIG_FILE="/etc/apache2/mime.types"
 -D SERVER_CONFIG_FILE="/etc/apache2/httpd.conf"


On 28/10/11 19:16, Rainer Jung wrote:
> Which version of httpd?
>
> On 28.10.2011 08:49, SpliFF wrote:
>> I've having an issue where a long-running backend script behind AJP is causing apache
to error with "Service Temporarily
>> Unavailable" after exactly 5 minutes.
>>
>> I tried to solve this by moving from mod_rewrite to mod_proxy, with the following
configuration:
>>
>>     # Search Engine Safe URL rewrite
>>     # Redirect Coldfusion requests to index.cfm
>>     # matches /file.mp4 but not /file:name.mp4 (ie; is a real file)
>>     RewriteCond %{REQUEST_FILENAME} !/[^/:]+\.[^/:]{2,5}$
>>     RewriteRule (.*) /index.cfm$1 [PT]
>>
>>     # Proxy CFML files to Jetty via AJP connector
>>     <Proxy *>
>>     Allow from 127.0.0.1
>>     </Proxy>
>>     ProxyPreserveHost On
>>     ProxyRequests Off
>>     ProxyPassMatch ^/(.+\.cf[cm])(/.*)?$ ajp://localhost:8009/$1$2 connectiontimeout=6000
timeout=6000
>>
>>
>> If I'm not mistaken those timeouts are in seconds so AJP should be waiting at least
100 minutes.
>>
>> I also made sure the Railo backend would wait long enough, using the following CFML
tag:
>>
>> <cfsetting requesttimeout=6000 />
>>
>> I checked the Jetty (Application server) config but there doesn't seem to be any
timeout options.
>>
>> The apache error log (with debugging) says:
>>
>> [Fri Oct 28 15:28:45 2011] [debug] mod_proxy_ajp.c(45): proxy: AJP: canonicalising
URL
>> //localhost:8009/index.cfm/subscribers/importold
>> [Fri Oct 28 15:28:45 2011] [debug] proxy_util.c(1525): [client 192.168.1.60] proxy:
*: found reverse proxy worker for
>> ajp://localhost:8009/index.cfm/subscribers/importold
>> [Fri Oct 28 15:28:45 2011] [debug] mod_proxy.c(1015): Running scheme ajp handler
(attempt 0)
>> [Fri Oct 28 15:28:45 2011] [debug] mod_proxy_ajp.c(659): proxy: AJP: serving URL
>> ajp://localhost:8009/index.cfm/subscribers/importold
>> [Fri Oct 28 15:28:45 2011] [debug] proxy_util.c(2011): proxy: AJP: has acquired connection
for (*)
>> [Fri Oct 28 15:28:45 2011] [debug] proxy_util.c(2067): proxy: connecting
>> ajp://localhost:8009/index.cfm/subscribers/importold to localhost:8009
>> [Fri Oct 28 15:28:45 2011] [debug] proxy_util.c(2193): proxy: connected /index.cfm/subscribers/importold
to localhost:8009
>> [Fri Oct 28 15:28:45 2011] [debug] proxy_util.c(2444): proxy: AJP: fam 2 socket created
to connect to *
>> [Fri Oct 28 15:28:45 2011] [debug] ajp_header.c(224): Into ajp_marshal_into_msgb
>> [Fri Oct 28 15:28:45 2011] [debug] ajp_header.c(290): ajp_marshal_into_msgb: Header[0]
[Host] =
>> [users.arcmail.betamax.arc.net.au]
>> [Fri Oct 28 15:28:45 2011] [debug] ajp_header.c(290): ajp_marshal_into_msgb: Header[1]
[User-Agent] = [Mozilla/5.0 (X11;
>> Linux x86_64; rv:7.0.1) Gecko/20100101 Firefox/7.0.1]
>> [Fri Oct 28 15:28:45 2011] [debug] ajp_header.c(290): ajp_marshal_into_msgb: Header[2]
[Accept] =
>> [text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8]
>> [Fri Oct 28 15:28:45 2011] [debug] ajp_header.c(290): ajp_marshal_into_msgb: Header[3]
[Accept-Language] = [en-us,en;q=0.5]
>> [Fri Oct 28 15:28:45 2011] [debug] ajp_header.c(290): ajp_marshal_into_msgb: Header[4]
[Accept-Encoding] = [gzip, deflate]
>> [Fri Oct 28 15:28:45 2011] [debug] ajp_header.c(290): ajp_marshal_into_msgb: Header[5]
[Accept-Charset] =
>> [ISO-8859-1,utf-8;q=0.7,*;q=0.7]
>> [Fri Oct 28 15:28:45 2011] [debug] ajp_header.c(290): ajp_marshal_into_msgb: Header[6]
[DNT] = [1]
>> [Fri Oct 28 15:28:45 2011] [debug] ajp_header.c(290): ajp_marshal_into_msgb: Header[7]
[Connection] = [keep-alive]
>> [Fri Oct 28 15:28:45 2011] [debug] ajp_header.c(290): ajp_marshal_into_msgb: Header[8]
[Cookie] =
>> [CFID=d5b4b21d-bea4-4875-b2f3-7dc003c7fa64; CFTOKEN=0; FW_BUGZ=; RAILO_ADMIN_LANG=en;
RAILO_ADMIN_LASTPAGE=server.cache]
>> [Fri Oct 28 15:28:45 2011] [debug] ajp_header.c(450): ajp_marshal_into_msgb: Done
>> [Fri Oct 28 15:28:45 2011] [debug] mod_proxy_ajp.c(265): proxy: APR_BUCKET_IS_EOS
>> [Fri Oct 28 15:28:45 2011] [debug] mod_proxy_ajp.c(270): proxy: data to read (max
8186 at 4)
>> [Fri Oct 28 15:28:45 2011] [debug] mod_proxy_ajp.c(285): proxy: got 0 bytes of data
>> [Fri Oct 28 15:28:46 2011] [debug] ajp_header.c(687): ajp_read_header: ajp_ilink_received
06
>> [Fri Oct 28 15:28:46 2011] [debug] ajp_header.c(697): ajp_parse_type: got 06
>> [Fri Oct 28 15:33:46 2011] [error] ajp_read_header: ajp_ilink_receive failed
>> [Fri Oct 28 15:33:46 2011] [debug] mod_proxy_ajp.c(531): (120006)APR does not understand
this error code:
>> ajp_read_header failed
>> [Fri Oct 28 15:33:46 2011] [debug] mod_proxy_ajp.c(546): proxy: Processing of request
failed backend: 1, output: 0
>> [Fri Oct 28 15:33:46 2011] [error] (120006)APR does not understand this error code:
proxy: dialog to (null) (*) failed
>> [Fri Oct 28 15:33:46 2011] [debug] proxy_util.c(2029): proxy: AJP: has released connection
for (*)
>>
>> Note the delay between "ajp_parse_type: got 06" and "ajp_ilink_receive failed" is
5 minutes accurate to the second. I
>> read somewhere that 5 minutes is the default timeout for mod_proxy so my suspicion
is the timeout settings are being
>> ignored. The only other theory I have is that the [PT] flag on the first rewrite
rule is causing those values to be ignored.
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