error when setting up cosmos db in Enable automatic updates in a web application using Azure Functions and SignalR Service

Question

Get the following error when running the azure function locally, anyone got any tips on how to solve this?

Executing 'Functions.getStocks' (Reason='This function was programmatically called via the host APIs.', Id=a4a0bd4a-d21e-45ff-9e28-5f84f6562468)

[2023-08-07T10:01:26.178Z] Error setting up database: Error: write EPROTO 181F0000:error:0A00014D:SSL routines:tls_process_key_exchange:legacy sigalg disallowed or unsupported:c:\ws\deps\openssl\openssl\ssl\statem\statem_clnt.c:2263:

[2023-08-07T10:01:26.181Z] at WriteWrap.onWriteComplete [as oncomplete] (node:internal/stream_base_commons:94:16)

[2023-08-07T10:01:26.182Z] at WriteWrap.callbackTrampoline (node:internal/async_hooks:130:17) {

[2023-08-07T10:01:26.184Z] errno: -4046,

Answer 1

Jan Boije Thanks for posting your question in Microsoft Q&A. Based on your description, you followed training path: https://learn.microsoft.com/en-us/training/modules/automatic-update-of-a-webapp-using-azure-functions-and-signalr/ and got the above error. Is that correct?

The full code snippet for the tutorial is available in https://github.com/MicrosoftDocs/mslearn-advocates.azure-functions-and-signalr/tree/master/end repo and found a similar discussion about this tls_process_key_exchange error pointing to https://github.com/MicrosoftDocs/mslearn-advocates.azure-functions-and-signalr/issues/41#issuecomment-1473677091 resolution.

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Solution:

That can be solved by bumping the Cosmos DB client to the latest version like that in package.json:

"@azure/cosmos": "^3.17.3",

That would require small change in the db.js file:

client = new CosmosClient({ endpoint, key: masterKey });

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Please try the suggestion and let me know if you face the issue.

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