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From "Daniel Castilla | thin(k)design" ...@thin-k-design.com>
Subject Re: Crash in http connector random once a day
Date Thu, 14 Mar 2019 11:37:22 GMT
Dear Guido,

thanks for the reply. The requests are reaching tomcat, and a thread
is always started, if I look at the current threads on the tomcat
manager I see the following, there are 4 threads that are processing
since 2+ hours:

R ? ? ? ? ? ?
S 16 ms 0 KB 0 KB 0:0:0:0:0:0:0:1 0:0:0:0:0:0:0:1 localhost GET
/manager/status HTTP/1.1
S 7256779 ms 0 KB 33 KB 0:0:0:0:0:0:0:1 0:0:0:0:0:0:0:1 localhost POST
/cloudworx/?method=words&id=17385 HTTP/1.1
S 7274046 ms 0 KB 33 KB 0:0:0:0:0:0:0:1 0:0:0:0:0:0:0:1 localhost POST
/cloudworx/?method=words&id=18986 HTTP/1.1
S 7228088 ms 0 KB 33 KB 0:0:0:0:0:0:0:1 0:0:0:0:0:0:0:1 localhost POST
/cloudworx/?method=words&id=10560 HTTP/1.1
R ? ? ? ? ? ?
S 7290093 ms 0 KB 33 KB 0:0:0:0:0:0:0:1 0:0:0:0:0:0:0:1 localhost POST
/cloudworx/?method=words&id=10560 HTTP/1.1

I'm not sure what other metrics would be helpful, but your Unix script
wouldn't help much, as I am on a Windows Server 2012 and I would like
to avoid installing Cygwin or something similar.

Regards,
Daniel


Am Do., 14. März 2019 um 12:02 Uhr schrieb Jäkel, Guido <G.Jaekel@dnb.de>:
>
> Dear Daniel,
>
> a request is logged in the access log after it has finished. (In addition, on Tomcat
the log is flushed with some delay, but that's not the problem here).
>
> But if the request is stall while processing, there's no hint in the access log. Therefore:
Is there an application log that may confirm that the request have reached the application
on Tomcat and have start to process?
>
> On Tomcat, there's also a request scoreboard feature where you may "live watch" outstanding
requests. You may access to it via the Tomcat Host Manager Application. As a hint, I may also
provide you a short (Unix) script to readout this from the MBean by HTTP via the jmxproxy-Feature
of the Manager.
>
> Greetings
>
> Guido
>
> >-----Original Message-----
> >From: Daniel Castilla | thin(k)design [mailto:dc@thin-k-design.com]
> >Sent: Thursday, March 14, 2019 11:10 AM
> >To: users@tomcat.apache.org
> >Subject: Crash in http connector random once a day
> >
> >The strange thing is, those failed requests with no response are
> >logged in the tomcat access logs with a 500 http connection error all
> >at the same time (although they begun with 1-2 min difference) and
> >after 8 to 24 hours (the URL is alway unique, so I know for sure).
>

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