My app https://mysticleads.com is hosted on vercel. It is using next + MongoDB node.js SDK and I am following this repo https://github.com/vercel/mongodb-starter/blob/main/lib/mongodb.ts
The issue is it giving me this error anytime a user “first” lands on the home page
2024-01-30T14:51:25.319Z ba64318f-9366-4bd2-a5e7-d81e884c3b88 ERROR Unhandled Promise Rejection {"errorType":"Runtime.UnhandledPromiseRejection","errorMessage":"MongoServerSelectionError: connection timed out","reason":{"errorType":"MongoServerSelectionError","errorMessage":"connection timed out","reason":{"type":"ReplicaSetNoPrimary","servers":{},"stale":false,"compatible":true,"heartbeatFrequencyMS":10000,"localThresholdMS":15,"setName":"atlas-wwfy0e-shard-0","maxElectionId":null,"maxSetVersion":null,"commonWireVersion":0,"logicalSessionTimeoutMinutes":null},"stack":["MongoServerSelectionError: connection timed out"," at EventTarget.<anonymous> (/var/task/node_modules/mongodb/lib/sdam/topology.js:276:34)"," at [nodejs.internal.kHybridDispatch] (node:internal/event_target:757:20)"," at EventTarget.dispatchEvent (node:internal/event_target:692:26)"," at abortSignal (node:internal/abort_controller:369:10)"," at TimeoutController.abort (node:internal/abort_controller:403:5)"," at Timeout.<anonymous> (/var/task/node_modules/mongodb/lib/utils.js:1011:92)"," at listOnTimeout (node:internal/timers:569:17)"," at process.processTimers (node:internal/timers:512:7)"]},"promise":{},"stack":["Runtime.UnhandledPromiseRejection: MongoServerSelectionError: connection timed out"," at process.<anonymous> (file:///var/runtime/index.mjs:1276:17)"," at process.emit (node:events:529:35)"," at emit (node:internal/process/promises:149:20)"," at processPromiseRejections (node:internal/process/promises:283:27)"," at process.processTicksAndRejections (node:internal/process/task_queues:96:32)"]}
[ERROR] [1706626285320] LAMBDA_RUNTIME Failed to post handler success response. Http response code: 400.
Error: Runtime exited with error: exit status 128
Runtime.ExitError
I’ve added this line to the end of MongoDB uri which kinda improves the situation a little serverSelectionTimeoutMS=60000&readPreference=secondaryPreferred
But I am still getting straight 500 for new visitors.
Please HELP
Ask me if you need anything else.