Hello everybody,
my problem seems to be solved. I uninstalled virus scanner, firewall and
virtual box (as it has a virtual network adapter). And reinstalled these
step by step until my Tomcat stops responding. I didn't want to beliefe
but have to yield to reason. ;) The firewall was the culprit. Now I have
to run with Windows Firewall for the time being.
Thank you all for your kind support. Best regards,
T. Gau
André Warnier schrieb am 06.08.2010 13:16:
...
Restarting a bit earlier in this conversation :
The browser connections are shown (by netstat.exe) in the state
"CLOSE_WAIT".
The following page explains what that means :
http://support.microsoft.com/kb/137984
If I understand this right, it means that the client has closed its
side of the connection (by sending a FIN packet). The socket is now
"half-closed", and the server should close its own side.
However, the server does not do that, and these sockets stay
half-closed (or half-opened, if you prefer).
What puzzles me, is the fact that according to the state of the
connections, the clients should have closed them, but you otherwise
write that the browser(s) still seem to display the fact that they are
waiting for something. You also say that the basic html page is
loaded, but that the images are missing.
It looks very much as if each browser can send one request (for the
home page), and receives a response (the home page, html-only). But
then, when the browser tries (on the same connection normally) to
request one of the embedded images, it does not receive a response and
keeps waiting for it. And the server seems to think that the browser
has disconnected, but never closes its end of the socket.
Obviously, something is seriously wrong somewhere, because this
situation does not really make sense.
But it does not really look like a Tomcat problem, and more like an
underlying network issue.
You have also mentioned that you disabled the Windows firewall, but
had been running some other firewall software at some point (which is
now also disabled).
At this point, my suspicions would go very much in the direction of
some interference by one or both of these firewall softwares.
Maybe when you initially installed the add-on firewall, you did
something wrong and now your Windows installation is somehow screwed up ?
It is relatively easy under Windows to get into such a kind of mess,
and relatively difficult to get out of it once it is there.
In my experience, different firewall packages and/or VPN packages have
a tendency to seriously interfere with eachother. You seem to have a
problem of that category.
Any chance of doing some "Windows repair" job before you continue ?
At the very least, I would try to completely de-install the additional
firewall software, and try again then. Just disabling that firewall
may not be enough to really remove the links and callbacks it may have
installed all over the place.
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