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From Saurav Sarkar <saurav.sark...@gmail.com>
Subject Re: Getting more information on connection refused error
Date Wed, 13 Nov 2019 17:14:11 GMT
Yes...i thought so...thanks for the JMX hint Chris.

Best Regards,
Saurav

On Wed, Nov 13, 2019 at 10:00 PM Christopher Schultz <
chris@christopherschultz.net> wrote:

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> Saurav,
>
> On 11/13/19 10:19, Saurav Sarkar wrote:
> > Hi All,
> >
> > We invoke one service which runs on a OSGI Virgo based embeddable
> > tomcat servlet container.
> > org.eclipse.gemini.web.tomcat_2.2.6.RELEASE.jar is the version we
> > use.
> >
> > After sending some load to the service, it starts giving
> > "connection refused error".
> >
> > errno: 111 (Connection refused), error: Connection refused (local
> > port <port number> to address <ip> (<server name>), remote port
> > 8443 to address <ip>).
> >
> > I assume this is due to fact that the server socket has run out of
> > connections and is not accepting any any more connection because
> > this happens under heavy load testing.
> >
> > I would like to know how can i get more information on why
> > connection was refused ?
> >
> > Will tomcat log this and what is logged under this scenario ? or
> > does this reaches at all to tomcat and  rather terminated at the OS
> > layer itself ?
>
> The connections are being refused by the OS's TCP/IP stack. Tomcat
> does not even know that these connections are being refused, so it
> cannot put anything in the logs.
>
> If you monitor your Tomcat instance[1], you should be able to see how
> many connections are in-flight and guess that you might be sometimes
> hitting your limit.
>
> - -chris
>
> [1] http://tomcat.apache.org/presentations.html#latest-monitoring-with-j
> mx
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