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From "Howard W. Smith, Jr." <smithh032...@gmail.com>
Subject Re: suddenly created many connections
Date Tue, 05 Mar 2013 17:39:57 GMT
Dhaval,

I have seen suddenly so many established connections like below on my
> system.
>
> There is http & tomcat both are running on the same machine.
>
>
it might be best for you to inform the list with more details on any/all
responsibilities/jobs/processes of this system of yours.

http & tomcat = ? http = apache httpd? what all is tomcat doing? is there a
web app running on tomcat serving many requests?



> Previously it was not there. only last 3 days i am observing it. moreover
> since then i have installed nagios on the same server to measure the
> activity of the server.
>

are you saying that you observed this behavior prior to or after installing
nagios?


>
> tcp        0      0 ::ffff:192.168.4.5:8009     ::ffff:192.168.4.5:36290
> ESTABLISHED -
> tcp        0      0 ::ffff:192.168.4.5:8009     ::ffff:192.168.4.5:41666
> ESTABLISHED -
> tcp        0      0 ::ffff:192.168.4.5:8009     ::ffff:192.168.4.5:52930
> ESTABLISHED -
>
> Can some one explain me.
>

FYI, sometime within the last 2 to 3 weeks, I did a 'netstat' in Command
Prompt on my development and production servers (Microsoft Windows Server
2008). This was really my first time doing this, and I recognized a lot of
'imap' connections on the production server. So, after some research
(searching google/stackoverflow.com), I refactored my javamail code that
was responsible for the many (or infinite # of) imap TCP connections
showing up in 'netstat' output, and now, I no longer have the infinite # of
imap TCP connections any longer.

So, you really have to examine your 'system'. Evidently, the TCP
connections are all considered as 'working as designed' (according to
someone's coding/implementation or some third party tool/software).

Howard

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