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2038340 - Logs full of 'POST zkau/comet' requests

Symptom

A problem with a massive amount of AJAX requests was noticed in some projects, sometimes up to 1,000 requests per minute. The common symptom was that there were many access log entries with requests containing the phrase /zkau/comet.

So many requests generate a huge load on the server and have a bad effect on performance.

ZK Bug - Massive Load Due to ZK problem

Case Study - Session Expired

Note: If the hybris platform version is lower than 4.6, or cockpit extensions were generated before 4.6, please check if the problem is connected with the reported bug.

If a browser session expires, the browser starts sending requests very quickly (many requests per second) and ZK doesn't have a proper default logic for this situation.

We found a tremendous amount of requests such as these in the access log:

146.67.143.72 - corp\Puser [26/Jan/2012:18:06:07  0100] "POST /customcockpit/zkau/comet?dtid=gd1e1 HTTP/1.1" 200 - "https://custom.net/customcockpit/" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C; .NET4.0E; InfoPath.2)"
146.67.143.72 - corp\Puser [26/Jan/2012:18:06:07  0100] "POST /customcockpit/zkau/comet?dtid=gh5o1 HTTP/1.1" 200 - "https://custom.net/customcockpit/" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; InfoPath.1)"
146.67.143.72 - corp\Puser [26/Jan/2012:18:06:07  0100] "POST /customcockpit/zkau/comet?dtid=gvn41 HTTP/1.1" 200 - "https://custom.net/customcockpit/" "Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; Trident/4.0; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)"
146.67.143.72 - corp\Puser [26/Jan/2012:18:06:07  0100] "POST /customcockpit/zkau/comet?dtid=g3m01 HTTP/1.1" 200 - "https://custom.net/customcockpit/" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; Trident/4.0; InfoPath.2; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729)"
146.67.143.72 - corp\Puser [26/Jan/2012:18:06:07  0100] "POST /customcockpit/zkau/comet?dtid=gdl HTTP/1.1" 200 - "https://custom.net/customcockpit/" "Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.2; Trident/4.0; .NET CLR 1.1.4322; .NET CLR 2.0.50727; .NET CLR 3.0.4506.2152; .NET CLR 3.5.30729; .NET4.0C; .NET4.0E; InfoPath.2)"

This generated a huge load on the server.

This problem was fixed in hybris Release 4.6.


Read more...

Environment

CKP versions 4.x

Product

hybris Commerce Suite 4.4 ; hybris Commerce Suite 4.5 ; hybris Commerce Suite 4.6 ; hybris Commerce Suite 4.7 ; hybris Commerce Suite 4.8

Keywords

KBA , CEC-COM-CPS-CKP , CPS Cockpits & hMC (SAP Commerce) , Bug Filed

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