I also get CLOSE_WAIT connections between one client and httpd (for a
GET request on one of the WO apps). Apache's server status page show
that the connection is Sending Reply ("W") for this request.
More info :
- When it's stuck, I get 5 connections who are in CLOSE_WAIT state,
the other TCP connections are ETABLISHED
- I'm looking at the WOAdaptor page, and the stuck instance has 14
to 18 active requests, and the other instances don't have any
active ones.
Since we upgraded our firewall and we moved two XServes on a
private LAN (the firewall is doing the NAT translation, before it
was a public DMZ), we got instances who hangs for 5 or 10 minutes,
with no reason. The only thing that I found is :
[2007-10-22 10:24:58 EDT] <WorkerThread1> <WOWorkerThread id=1
socket=Socket[addr=/192.168.10.201,port=64467,localport=2001]>
Exception while sending response: java.net.SocketException:
Connection reset
[2007-10-22 11:51:12 EDT] <WorkerThread9> <WOWorkerThread id=9
socket=Socket[addr=/192.168.10.201,port=58180,localport=2001]>
Exception while sending response: java.net.SocketException: Broken
pipe
[2007-10-22 11:51:12 EDT] <WorkerThread10> <WOWorkerThread id=10
socket=Socket[addr=/192.168.10.201,port=58190,localport=2001]>
Exception while sending response: java.net.SocketException: Broken
pipe
[2007-10-22 11:51:12 EDT] <WorkerThread11> <WOWorkerThread id=11
socket=Socket[addr=/192.168.10.201,port=58218,localport=2001]>
Exception while sending response: java.net.SocketException: Broken
pipe
[2007-10-22 11:51:12 EDT] <WorkerThread13> <WOWorkerThread id=13
socket=Socket[addr=/192.168.10.201,port=58237,localport=2001]>
Exception while sending response: java.net.SocketException: Broken
pipe
It's never the same application or the same instance who's
hanging, it's completly random :-/ But it's always the same
pattern, no response from the instance for 5 or 10 minutes, and it
start working again without having to do anything.
We looked at the firewall and the switch logs, and we don't find
any errors. Anyone got this problem.
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