tomcat-users mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Howard W. Smith, Jr." <>
Subject Re: suddenly created many connections
Date Tue, 05 Mar 2013 17:39:57 GMT

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

> tcp        0      0 ::ffff:     ::ffff:
> tcp        0      0 ::ffff:     ::ffff:
> tcp        0      0 ::ffff:     ::ffff:
> 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/, 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).


  • Unnamed multipart/alternative (inline, None, 0 bytes)
View raw message