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[Xen-users] tcp connections bewteen domUs woes

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Thomas <iamkenzo@xxxxxxxxx>
  • Date: Wed, 22 Jul 2009 17:50:07 +0200
  • Delivery-date: Wed, 22 Jul 2009 08:50:54 -0700
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>


I have 2 domUs communicating between, each other. One has Nginx
running that processes all incoming requests, if it's a static file,
it serves it directly, if it's a dynamic request, it then proxy_pass
the request to a Rails app hosted on another domU. For a few days now,
I am experiencing some problems between these 2 domUs. Here is a
picture of the problem:

$ netstat -anp
Proto Recv-Q Send-Q Local Address           Foreign Address
State       PID/Program name
tcp     1239      0  CLOSE_WAIT -
tcp        1      0  CLOSE_WAIT -
tcp     1107      0  CLOSE_WAIT -
tcp     1239      0  CLOSE_WAIT -
tcp     1152      0  CLOSE_WAIT -
tcp     1152      0  CLOSE_WAIT

Connection never close and will keep adding. At some point in time all
running processes of my Rails app will get stuck and my application
will become unreachable. Any idea where that could come from?

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