Solved

SharePoint 2013 App Server Failover

Posted on 2014-03-24
6
353 Views
Last Modified: 2014-04-06
In the process of fail over testing of a new farm, my App servers seem to fail over correctly when I cleanly shut a server down (OS Shutdown).

However, when I test for fail over simply by disabling the network connection (via V Sphere), fail over does not work.

To clarify. I am testing fail over simply by using search. When I shutdown one of the two servers, search still produces results and the same when the other app server is cleanly shutdown.

While both servers are running, if I disconnect one from the network, I receive no results and the ULS log show a "Query time out error".

So the question, why does this happen and how can it be avoided? If anyone can shed some light on this it would be greatly appreciated.

Thanks
0
Comment
Question by:Walter Curtis
  • 3
6 Comments
 
LVL 15

Author Comment

by:Walter Curtis
ID: 39959034
This is additional information I did not include in the original question.

As described above, search produces no results when the network connection is disabled, however on the app server directly, (access via host file), I am able to search and I do get search results. It is just when coming in over F5 (load balancer) and hitting one of the three web front ends that I receive no search results. (Keep in mind, there is still one of the two app servers running during this fail over testing.)

Hope that additional information helps me get some bites on this question.

Thanks
0
 
LVL 28

Accepted Solution

by:
Ryan McCauley earned 500 total points
ID: 39973336
Does the F5 properly report that the node is offline when the network connection is removed? Or do requests go properly to the two online nodes, but SharePoint is just still attempting to refer search requests to the downed node?

Also, after a period of time passes, do search queries start working properly again, or are they broken until you bring the downed node back online?
0
 
LVL 15

Author Comment

by:Walter Curtis
ID: 39973428
Thanks for the feedback -
As far as I know, the apps servers are not load balanced by the F5, just the 3 WFE servers. Considering that all request come in through the WFE's, how does a WFE know where to send the search request?

As to the second point. excellent question that I don't have an answer to because I didn't run the fail over test more than a few minutes. I will run a test again today after hours and see if there is a period of time when it might come back up.

Many thanks for the thoughts and questions, they help me think about the solution in a new light.
0
 
LVL 15

Author Closing Comment

by:Walter Curtis
ID: 39981317
Thanks for the information. I am still testing but your suggestions helped greatly.
0

Featured Post

Are your corporate email signatures appalling?

Is it scary how unprofessional your email signatures look? Do users create their own terrible designs and give themselves stupid job titles? You can make this a lot easier for yourself by choosing an email signature management solution from Exclaimer today.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

The vision: A MegaMenu for a SharePoint portal home page The mission: Make it easy to maintain. Allow rich content and sub headers as well as standard links. Factor in frequent changes without involving developers or a lengthy Dev/Test/Prod rel…
More or less everybody in the IT market understands the basics of Networking, however when we start talking about Storage Networks, things get a bit dizzier, and this is where I would like to help.
This tutorial gives a high-level tour of the interface of Marketo (a marketing automation tool to help businesses track and engage prospective customers and drive them to purchase). You will see the main areas including Marketing Activities, Design …
Video by: Mark
This lesson goes over how to construct ordered and unordered lists and how to create hyperlinks.

867 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

25 Experts available now in Live!

Get 1:1 Help Now