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Question by Sathwika V. · Apr 24, 2017 at 02:10 PM · appmon configuration agent production web performance monitoring installation 6.2

web server is shut down No alerts received.

Hi,

We are using Apache web server and dynatrace agents are instrumented on each web server. We observed web server was down but we didn't receive any alerts and observed agents were up & running. My question "Is web server agents instrumentation will be different from App server agents?"

Thanks,

Sathwika

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Answer by Dave M. · Apr 24, 2017 at 02:20 PM

Hi Sathwika,

The Web Server Agent has a master process that runs as a service that the child apache processes attach to (sort of like a "mini-collector"). If the apache child process is shutdown normally, there will be no incident raised, unless you enable the (disabled by default) Application Process Shutdown incident. If you do enable this incident, you will get an alert every time a process is shutdown. However, if you make good use of Downtimes, this may work well for you without too many false alarms.

HTH,

dave

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avatar image Sathwika V. · Apr 24, 2017 at 02:26 PM 0
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Dave-

thanks for your reply

Application process shutdown incident was enabled already but we didn't receive any alerts. Server downtime was setup already,

Thanks,

Sathwika

avatar image Babar Q. Sathwika V. · Apr 24, 2017 at 02:33 PM 0
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Hello Sathwika,

Check in the incidents dashboard first for the said incident and then check if your email working properly.

Regards,

Babar

avatar image Sathwika V. Babar Q. · Apr 24, 2017 at 04:14 PM 0
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hi babar,

I checked incidents dashboard no incident related to web server shut down.

Thanks,

Sathwika

avatar image Babar Q. Sathwika V. · Apr 24, 2017 at 05:29 PM 0
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Hello Sathwika,

Did you expand the timeframe to find the the alert?

If there is no alert in the 'Incident Dashboard' then check the agent logs because in any case you will have to have the alert there whether you received an email or not.

Which server downtime you are talking about? Are you talking about 'Incident' downtime?

Regards,

Babar

avatar image Dave M. Sathwika V. · Apr 25, 2017 at 07:43 AM 0
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Hi Sathwika,

Did your shutdown of apache take place outside of the downtime you defined?

I suspected that maybe the incident would fire only if the master agent was shutdown, but I confirmed (on v6.5.10 running on windows) that it fires for either the master or the child shutting down.

So, if you did a normal shutdown (not a kill of the process) and had no Downtime in effect, I am not sure why it would not fire for you.

Thanks,

dave

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