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  • >> Go to dataminer.services

WebService availability during failover

Solved1.07K views17th October 2023Failover WebService
2
André Kaiser [DevOps Advocate]532 22nd May 2023 0 Comments

Hi Dojo Community,

we have a broadcast control system, that connects via WebService(v1) to our DMS to get some parameter values and set some view properties. The connection is usign HTTPS only and work pretty stable until a situation, when either a failover is happening in the DMS (no matter which DMA) or a DMA pair is not shown not connected. During this period the broadcast controler tries to renew its connection, but cannot authenticate.
Once all DMAs are online again the connection is automatically reestablished and communication continues.

Is this behaviour expected and can it be avoided somehow?

Marieke Goethals [SLC] [DevOps Catalyst] Selected answer as best 17th October 2023

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Simon Raine [SLC] [DevOps Advocate]2.02K Posted 28th June 2023 5 Comments

Hi André,

At first glance I believe this would be expected as the DMS is generally unavailable during a switch.

André Kaiser [DevOps Advocate] Posted new comment 17th October 2023
André Kaiser [DevOps Advocate] commented 30th June 2023

HI Simon,
many thanks for your feedback.
This is true, when you have only 2 agents (main/backup) in a DMS, but when there are other agent pairs in the DMS the system is still reachable, when a failover is done on one single agent pair.

Simon Raine [SLC] [DevOps Advocate] commented 16th October 2023

That’s true. I should have said that the failover pair is not reachable during the switch. Indeed if you have other DMAs that are not in failover or switching, then indeed they are still reachable

André Kaiser [DevOps Advocate] commented 17th October 2023

A good example might be, that we are seeing a reproducible disconnect of a Webservice (v1) connection to DMA1 when there is failover of DMA6.
The Webservice is used to retrieve parameter values from elements hosted on DMA1 and DMA3. So there is no direct relationship to DMA6 of the active Webservice connection.

Marieke Goethals [SLC] [DevOps Catalyst] commented 17th October 2023

Hi André,
That sounds like a software issue that will need to be investigated more in depth. Could you contact techsupport@skyline.be for this?

André Kaiser [DevOps Advocate] commented 17th October 2023

Thanks. I will doublecheck this with techsupport.

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