Do you have a way to analyze the requests inbound that are correlated with the 502s? Are they legit requests?
Steve Lerner | Principal Architect, Performance Engineering | m 212.495.9212 | [email protected]<mailto:[email protected]> | Skype: steve.lerner [ebay_logo_onl.png] From: Muhammad Faisal [mailto:[email protected]] Sent: Monday, March 21, 2016 8:04 AM To: [email protected]; [email protected] Subject: Re: Question on ATS Performance ATS is connected to upstream router directly im using PBR to redirect traffic for http caching. -- Regards, Faisal. ------ Original Message ------ From: "Lerner, Steve" <[email protected]<mailto:[email protected]>> To: "[email protected]<mailto:[email protected]>" <[email protected]<mailto:[email protected]>>; "Muhammad Faisal" <[email protected]<mailto:[email protected]>> Sent: 3/21/2016 5:00:00 PM Subject: RE: Question on ATS Performance If I may be so bold… what kind of front end do you have in front of the ATS service? I.e. any other firewall, load balancer, network proxy, etc? Steve Lerner | Principal Architect, Performance Engineering | m 212.495.9212 | [email protected]<mailto:[email protected]> | Skype: steve.lerner [ebay_logo_onl.png] From: Muhammad Faisal [mailto:[email protected]<mailto:[email protected]>] Sent: Monday, March 21, 2016 7:57 AM To: [email protected]<mailto:[email protected]>; [email protected]<mailto:[email protected]> Subject: Re: Question on ATS Performance Hi Leif, The error 502 is causing impact on user experience. When traffic if diverted toward ATS in a production environment many established session re-establish via ATS box. In this case several websites starts giving 502 errors. Disabling keep alive and restarting server didn’t help this time so i offload the traffic for now. Kindly guide how to fix this behavior ? PS: Mostly sites found hosted on @K@mai -- Regards, Faisal. ------ Original Message ------ From: "Leif Hedstrom" <[email protected]<mailto:[email protected]>> To: [email protected]<mailto:[email protected]> Sent: 2/13/2016 9:41:55 AM Subject: Re: Question on ATS Performance On Feb 12, 2016, at 8:38 PM, Muhammad Faisal <[email protected]<mailto:[email protected]>> wrote: Hi Leif, Yes I’m using v6.1.1. I turned off keep-alive for sometime and re-enabled it this resolved the 502 error. The jira already has TS-3959 I have updated my comments though.Should I file it on Jira? Ah. Yeh, TS-3959 is sufficient I think. Did re-enabling keep-alive actually resolve it again? @bcall: Any ideas on this? — leif
