Azure Durable Function - Unavailable port

Question

While working on Azure Durable, if I have to restart the service on my local. I get this error (snapshot) - "Port 7071 is unavailable. Close the porcess using that port or specify another port by using --port".

To get over this issue, I have to wait for a couple of minutes after I have stopped the service and then start it. In case it does not work, I will wait for another 2-3 minutes and try again. Although the workaround works on a consistent basis, it's still a pain.

Anyone knows of a better solution.

score 0 · Answer 1 · answered Sep 07 '18 at 19:05

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https://github.com/Azure/azure-functions-core-tools/blob/9a22f71c3b0aef6be8c3dbe9ad758e5f9713386b/src/Azure.Functions.Cli/Helpers/NetworkHelpers.cs mentions a possible race condition here.

answered Sep 07 '18 at 19:05

muaddoob

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So it's a bug. If yes, can this also happen on Prod after a new deployment or restart of server? – Tarun Bhatt Sep 09 '18 at 21:11
Hitting this all the time right now in development. Was there any mention of a resolution? – Squiggle Sep 28 '18 at 15:46

Joel Gallagher · Answer 2 · 2018-12-12T05:57:24.753

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October 19th 2018 (the month after original question posted) a fix was committed. https://github.com/Azure/azure-functions-core-tools/commit/b34b693ff6b031dffeb68fb01f6bdb47d963e18f

Original github issue : https://github.com/Azure/Azure-Functions/issues/1000

Seems the solution is to wait a moment between debug sessions.

edited Dec 12 '18 at 05:57

answered Dec 12 '18 at 05:44

Joel Gallagher

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Azure Durable Function - Unavailable port

2 Answers2