HAProxy crashing Reel::Server

[koaps]

Hi all,

HAProxy HTTP checks keeps crashing the Reel::Server.

I'm seeing this when running the spy_hello_world.rb

*** Starting server on http://127.0.0.1:8001
+++ 127.0.0.1:45255 (AF_INET) connected
GET / HTTP/1.1
Host: webapp

HTTP/1.1 200 OK
Connection: Keep-Alive
Content-Length: 13

hello, world!--- 127.0.0.1:45255 (AF_INET) disconnected
E, [2013-11-15T00:20:05.154000 #40167] ERROR -- : Reel::Server crashed!
Reel::StateError: already processing a request
/home/koaps/jruby/lib/ruby/gems/shared/gems/reel-0.5.0.pre/lib/reel/connection.rb:55:in request' /home/koaps/jruby/lib/ruby/gems/shared/gems/reel-0.5.0.pre/lib/reel/connection.rb:78:ineach_request'
hello_world.rb:13:in (root)' org/jruby/RubyProc.java:276:incall'
/home/koaps/jruby/lib/ruby/gems/shared/gems/reel-0.5.0.pre/lib/reel/server.rb:52:in handle_connection' org/jruby/RubyKernel.java:1683:inpublic_send'
/home/koaps/jruby/lib/ruby/gems/shared/gems/celluloid-0.15.2/lib/celluloid/calls.rb:25:in dispatch' /home/koaps/jruby/lib/ruby/gems/shared/gems/celluloid-0.15.2/lib/celluloid/calls.rb:122:indispatch'
/home/koaps/jruby/lib/ruby/gems/shared/gems/celluloid-0.15.2/lib/celluloid/actor.rb:322:in handle_message' /home/koaps/jruby/lib/ruby/gems/shared/gems/celluloid-0.15.2/lib/celluloid/actor.rb:416:intask'
/home/koaps/jruby/lib/ruby/gems/shared/gems/celluloid-0.15.2/lib/celluloid/tasks.rb:55:in initialize' /home/koaps/jruby/lib/ruby/gems/shared/gems/celluloid-0.15.2/lib/celluloid/tasks/task_fiber.rb:13:increate'
W, [2013-11-15T00:20:05.158000 #40167] WARN -- : Terminating task: type=:call, meta={:method_name=>:run}, status=:iowait

If I start the server on another port that HAProxy isn't checking and hit it with links, there's no issues.

*** Starting server on http://127.0.0.1:8002
+++ 127.0.0.1:44958 (AF_INET) connected
GET / HTTP/1.1
Host: 127.0.0.1:8002
User-Agent: ELinks/0.12pre6 (textmode; SunOS 5.11 i86pc; 213x68-2)
Accept: /
Accept-Language: en
Connection: Keep-Alive

HTTP/1.1 200 OK
Connection: Keep-Alive
Content-Length: 13

hello, world!--- 127.0.0.1:44958 (AF_INET) disconnected

I had simular issues with Reel-Rack and I was able to get it to stop crashing by setting HAProxy httpchk to use HTTP/1.1 but the Reel::Server crashes with the same config.

From HAProxy config file:

option httpchk GET / HTTP/1.1\r\nHost:\ webapp

I'm assuming HAProxy discounts right away and Reel::Server doesn't like that, but I am not sure.

[tarcieri]

It looks like there's a potential problem with the request not getting cleared from the connection if it snaps shut while writing the response. This could use some better checking of the request state machine.

[sax]

HAProxy aborts the tcp connection after the first ack on a status check.

[damned]

i found this issue while raising #229 - i think possibly related