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Nov 17, 2009, 10:05 PM
Post #1 of 1
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[Bug 48219] New: Retrying the worker for seems to omit POST variables
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https://issues.apache.org/bugzilla/show_bug.cgi?id=48219
Summary: Retrying the worker for seems to omit POST variables
Product: Apache httpd-2
Version: 2.2.3
Platform: Other
OS/Version: Linux
Status: NEW
Severity: normal
Priority: P2
Component: mod_proxy_balancer
AssignedTo: bugs [at] httpd
ReportedBy: ops [at] tyro
It appears that when mod_proxy_balancer is retrying to sent a request to the
same worker it drops the POST data and adds itself again to the relevant
x-forwarded headers:
first request (has been modified for security reasons):
[18 Nov 2009 12:16:30,683]
POST /integration-server/terminals/2/103/transactions HTTP/1.0
Host: a.tyro.com
User-Agent: changed
Accept: */*
Content-Type: application/x-www-form-urlencoded
Expect: 100-continue
X-Forwarded-For: A.B.C.D
X-Forwarded-Host: a.tyro.com
X-Forwarded-Server: a.tyro.com
Content-Length: 154
second request (has been modified for security reasons):
[18 Nov 2009 12:16:30,690]
POST /integration-server/terminals/2/103/transactions HTTP/1.0
Host: a.tyro.com
User-Agent: changed
Accept: */*
Content-Type: application/x-www-form-urlencoded
Expect: 100-continue
X-Forwarded-For: 59.167.235.179, 59.167.235.179
X-Forwarded-Host: a.tyro.com, a.tyro.com
X-Forwarded-Server: a.tyro.com, a.tyro.com
Content-Length: 0
This is a reproducible behaviour. Does that make sense to anyone who knows the
code?
Also just to confuse me a little bit more: Our application servers responded
with a 503 and it looked like the balancer is retrying the connection instead
of passing this on to the client? I did some reading and thought that the
balancer only considers a connection problem to the worker a failover reason?
Our configuration is:
[...]
SetEnv force-proxy-request-1.0 1
SetEnv proxy-nokeepalive 1
<Proxy balancer://integrationwebapp>
BalancerMember http://webapp-1:8008 retry=60
BalancerMember http://webapp-2:8008 status=+H
ProxySet lbmethod=bytraffic
</Proxy>
[...]
//sascha
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