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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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