perfSONAR User Q&A and Other Discussion

[Nils Jacobson <>]

Hi Pedro,

This is a known issue in the owamp graphs. When a user tries to retrieve graphs for duration longer than 2-3 days, then the cgi times out and throws an "Internal Server Error".

Try using the arrows provided near the bottom of the graphs. Another way is to copy the url in a new window and modify the sTime and eTime parameters. (Please note that sTime and eTime are unix timestamps).

Thank you,

Nils Jacobson, Network Software Programmer
Internet2
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From: Pedro Queirós <>

Date: August 6, 2012 7:19:28 AM EDT

To:

Subject: [perfsonar-user] Error generating OWAMP graphs and checking older measurements

Reply-To:

Hello,

I'm having problems generating some OWAMP graphs. Sometimes it works,
sometimes it doesn't, especially when trying to see the 1 week graphs.
When it doesn't work, I get a 500 Internal Server Error - "The server
encountered an internal error or misconfiguration and was unable to
complete your request."
I've checked the logs and I see a lot of:

Mon Aug 06 10:16:38 2012] [error] [client 87.196.X.X] Use of
uninitialized value in string eq at
/opt/perfsonar_ps/serviceTest/cgi-bin/delayGraph.cgi line 151.,
referer: http://X.X.X.X/serviceTest/index.cgi?eventType=owamp

[Mon Aug 06 11:26:48 2012] [error] [client 87.196.X.X] Can't call
method "getDocumentElement" on an undefined value at
/opt/perfsonar_ps/serviceTest/cgi-bin/delayGraph.cgi line 279.,
referer: http://X.X.X.X/serviceTest/index.cgi?eventType=owamp

I'm guessing some kind of timeout is happening in the .cgi?


Also, is there a way that I can graph older measurements? For example,
a specific day or week in the past month. And is it possible to
retrieve the one-way delay, loss and jitter values for a specific time
window?

Thank you for your time!


Kind Regards,
Pedro Queirós

Internet2 Fall Member Meeting
Sep 30-Oct 4, 2012 - Philadelphia, PA
http://events.internet2.edu/2012/fall-mm/