Microsoft Graph
A Microsoft programmability model that exposes REST APIs and client libraries to access data on Microsoft 365 services.
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Create presence subscription creates multiple subscriptions
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(288, 42%, 37%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3ERS%3C/text%3E%3C/svg%3E)
R_R@spring
25
Reputation points
We have a use-case to create a presence subscription when Teams user navigates to our custom app. The logic each time the user visits the app is to delete the previous subscription and to create a new one. Everything works fine when run locally.
Once we deployed our app server to AWS elastic container, which consists of a load-balancer and 2 instances of the server running, the createSubscription API seems tries to create two subscriptions. As a result we face an error
Error in createSubscription --Error: Operation: Create; Exception: [Status Code: Conflict; Reason: The subscription conflict - Subscription already exists.
I would like to understand more about the createSubscription behavior with multiple server instances to troubleshoot the issue.
Sharing some logs below when the previous subscription is deleted and a new one is being created
December 26, 2023 at 22:01 (UTC-8:00) {ts: 2023-12-27 06:01:27:127, level: [32minfo[39m, module: PresenceManager, id:71903491-7ea4-4f9b-8529-11b6fd81ac5d, msg: [32mDeleting subscription [39m}
December 26, 2023 at 22:04 (UTC-8:00) 192.168.0.60 - - [27/Dec/2023:06:04:12 +0000] "POST /presence-notify?validationToken=Validation%3a+Testing+client+application+reachability+for+subscription+Request-Id%3a+074ce532-1f77-2726-1ab2-d405d3e63547 HTTP/1.1" 200 117 "-" "-" "52.159.107.4"
December 26, 2023 at 22:04 (UTC-8:00) {ts: 2023-12-27 06:04:12:412, level: [35mhttp[39m, module: RestifyServer, msg: [35m127.0.0.1 - POST /presence-notify?validationToken=Validation%3a+Testing+client+application+reachability+for+subscription+Request-Id%3a+074ce532-1f77-2726-1ab2-d405d3e63547 HTTP/1.0 200 117 - 0.245 ms[39m
December 26, 2023 at 22:04 (UTC-8:00) 192.168.1.96 - - [27/Dec/2023:06:04:12 +0000] "POST /presence-notify?validationToken=Validation%3a+Testing+client+application+reachability+for+subscription+Request-Id%3a+a9b4dcda-4ed2-1614-7e7c-2c349b7aa4ac HTTP/1.1" 200 117 "-" "-" "20.25.189.138"
December 26, 2023 at 22:04 (UTC-8:00) {ts: 2023-12-27 06:04:12:412, level: [35mhttp[39m, module: RestifyServer, msg: [35m127.0.0.1 - POST /presence-notify?validationToken=Validation%3a+Testing+client+application+reachability+for+subscription+Request-Id%3a+a9b4dcda-4ed2-1614-7e7c-2c349b7aa4ac HTTP/1.0 200 117 - 0.427 ms[39m
December 26, 2023 at 22:04 (UTC-8:00) {ts: 2023-12-27 06:04:13:413, level: [34mdebug[39m, module: PresenceManager, msg: [34mCreated presence subscription: 21e2b4a5-218c-4567-a441-28d7cf88902d for user d3a2a55a-de7f-472d-97f6-12bd4e81febf[39m}
December 26, 2023 at 22:04 (UTC-8:00) {ts: 2023-12-27 06:04:13:413, level: [32minfo[39m, module: PresenceManager, msg: [32mInitiate re-subscription to presence changes for connection cdd2d8dd-cbfc-49aa-8dba-bf9ee5e1e771[39m}
December 26, 2023 at 22:04 (UTC-8:00) {ts: 2023-12-27 06:04:13:413, level: [33mwarn[39m, module: PresenceManager, msg: [33mError in createSubscription --Error: Operation: Create; Exception: [Status Code: Conflict; Reason: The subscription conflict - Subscription already exists.][39m}
Microsoft Graph
Microsoft Teams Development
Microsoft Teams Development
Microsoft Teams: A Microsoft customizable chat-based workspace.Development: The process of researching, productizing, and refining new or existing technologies.
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(57.599999999999994, 65%, 15%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EMM%3C/text%3E%3C/svg%3E)
Meghana-MSFT 4,106 Reputation points Microsoft External Staff2023-12-29T14:53:27.08+00:00 Thanks for raising your query.
We will look into it and let you know the updates. -
Meghana-MSFT 4,106 Reputation points Microsoft External Staff
2024-01-03T07:19:47.37+00:00 We have the below suggestion from engineering team - This is the developer's specific implementation. Since there are multiple instances of app server running behind a load balancer, it looks like that each instance is independently calling the createSubscription API when a user visits the app and is throwing error. It is suggested that they need to use some kind of syncing or locking system to ensure only one server is maintaining subscription for a specific user, so once a subscription is created the other server does not try to do the same.
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