Azure Cosmos DB: Connection Timeout implementing Node.js SDK in Production
I'm experiencing persistent connection timeout issues when trying to connect to Azure Cosmos DB using the Node.js SDK. My application runs in a production environment and is designed to handle a important amount of traffic, but I'm getting the following behavior intermittently: ``` behavior: TimeoutError: Connection to CosmosDB timed out. ``` I've tried increasing the connection timeout settings in the SDK configuration, but it doesn't seem to resolve the scenario. Here’s the code snippet I'm using to create the Cosmos client: ```javascript const { CosmosClient } = require('@azure/cosmos'); const client = new CosmosClient({ endpoint: process.env.COSMOS_DB_ENDPOINT, key: process.env.COSMOS_DB_KEY, connectionPolicy: { requestTimeout: 20000, maxRetryAttemptsOnThrottledRequests: 5 } }); ``` I've also checked the networking settings to ensure that my App Service has proper access to the Cosmos DB account, and I've set the firewall rules accordingly. Despite this, the connection times out occasionally, especially during peak hours. Moreover, my Cosmos DB account is set to use the SQL API and is configured for throughput of 400 RU/s. Given this setup, I expected it to handle the load gracefully. Could this scenario be related to the provisioned throughput or something else in the configuration? I would appreciate any insights on how to diagnose and fix this question effectively. I'm working on a application that needs to handle this. Any examples would be super helpful.