id	summary	reporter	owner	description	type	status	priority	milestone	component	version	resolution	keywords	cc	uname	nginx_version
142	infinite loop until server fails in upstream module  with round robin	unixant@…	somebody	"I use nginx as a load balancing for backend web server.
if this upstream has n servers,and m backup servers,and the n servers are not available(Connection refused),round robin will try n*max_fails times to connect to the n servers。but if there is no backup servers,round robin only try n times to the n servers.
such as:
    upstream bdbk {
         #no program listen on 8081,8082
        server 127.0.0.1:8081 max_fails=3 fail_timeout=10s;
        server 127.0.0.1:8082 max_fails=3 fail_timeout=10s;

        server 127.0.0.1:8083 max_fails=3 fail_timeout=10s backup;
        server 127.0.0.1:8084 max_fails=3 fail_timeout=10s backup;
    }
  if i make a request,upstream try 6(n*max_fails) to connect to 8081 8082 , then round robin try to connect to backup server.
   if there is no backup servers。nginx only try 2(n) connect to 8081 8082。
    "	defect	closed	minor		nginx-module	1.1.x	fixed	round robin infinite loop		Linux localhost.localdomain 2.6.35.6-45.fc14.i686 #1 SMP Mon Oct 18 23:56:17 UTC 2010 i686 i686 i386 GNU/Linux	"nginx version: nginx/1.0.12
built by gcc 4.5.1 20100924 (Red Hat 4.5.1-4) (GCC) 
configure arguments: --with-debug --add-module=addon/jstatus --prefix=output"