My Next.js 15 application crashes frequently when I simply enter it.
Below is a picture of the error
I have been seeing this for a long time but I feel that it is getting worse now, and this has greatly harmed my users’ experience in my application.
Please help me!
@julio_faria Have you checked the Function logs?
https://docs.netlify.com/functions/logs/
They’ll probably provide a clue as to what’s occurring.
It’s even provided by Netlify under ‘Next steps’ in your original screenshot…
I managed to get the log of the possible error:
Mar 11, 07:14:29 AM: a5c25405 ERROR Unhandled Promise Rejection {"errorType":"Runtime.UnhandledPromiseRejection","errorMessage":"MongoServerSelectionError: Server selection timed out after 30000 ms","reason":{"errorType":"MongoServerSelectionError","errorMessage":"Server selection timed out after 30000 ms","reason":{"type":"ReplicaSetNoPrimary","servers":{},"stale":false,"compatible":true,"heartbeatFrequencyMS":10000,"localThresholdMS":15,"setName":"atlas-wm3xpi-shard-0","maxElectionId":null,"maxSetVersion":null,"commonWireVersion":0,"logicalSessionTimeoutMinutes":null},"stack":["MongoServerSelectionError: Server selection timed out after 30000 ms"," at Timeout._onTimeout (/var/task/node_modules/mongodb/lib/sdam/topology.js:278:38)"," at listOnTimeout (node:internal/timers:581:17)"," at process.processTimers (node:internal/timers:519:7)"]},"promise":{},"stack":["Runtime.UnhandledPromiseRejection: MongoServerSelectionError: Server selection timed out after 30000 ms"," at process.<anonymous> (file:///var/runtime/index.mjs:1276:17)"," at process.emit (node:events:530:35)"," at emitUnhandledRejection (node:internal/process/promises:250:13)"," at throwUnhandledRejectionsMode (node:internal/process/promises:385:19)"," at processPromiseRejections (node:internal/process/promises:470:17)"," at processTicksAndRejections (node:internal/process/task_queues:96:32)"," at runNextTicks (node:internal/process/task_queues:64:3)"," at listOnTimeout (node:internal/timers:545:9)"," at process.processTimers (node:internal/timers:519:7)"]}Mar 11, 07:14:29 AM: [ERROR] [1741688069432] LAMBDA_RUNTIME Failed to post handler success response. Http response code: 400.
Mar 11, 07:18:40 AM: 35c2e9c6 ERROR Unhandled Promise Rejection {"errorType":"Runtime.UnhandledPromiseRejection","errorMessage":"MongoServerSelectionError: Server selection timed out after 30000 ms","reason":{"errorType":"MongoServerSelectionError","errorMessage":"Server selection timed out after 30000 ms","reason":{"type":"ReplicaSetNoPrimary","servers":{},"stale":false,"compatible":true,"heartbeatFrequencyMS":10000,"localThresholdMS":15,"setName":"atlas-wm3xpi-shard-0","maxElectionId":null,"maxSetVersion":null,"commonWireVersion":0,"logicalSessionTimeoutMinutes":null},"stack":["MongoServerSelectionError: Server selection timed out after 30000 ms"," at Timeout._onTimeout (/var/task/node_modules/mongodb/lib/sdam/topology.js:278:38)"," at listOnTimeout (node:internal/timers:581:17)"," at process.processTimers (node:internal/timers:519:7)"]},"promise":{},"stack":["Runtime.UnhandledPromiseRejection: MongoServerSelectionError: Server selection timed out after 30000 ms"," at process.<anonymous> (file:///var/runtime/index.mjs:1276:17)"," at process.emit (node:events:530:35)"," at emitUnhandledRejection (node:internal/process/promises:250:13)"," at throwUnhandledRejectionsMode (node:internal/process/promises:385:19)"," at processPromiseRejections (node:internal/process/promises:470:17)"," at processTicksAndRejections (node:internal/process/task_queues:96:32)"," at runNextTicks (node:internal/process/task_queues:64:3)"," at listOnTimeout (node:internal/timers:545:9)"," at process.processTimers (node:internal/timers:519:7)"]}Mar 11, 07:18:40 AM: [ERROR] [1741688320312] LAMBDA_RUNTIME Failed to post handler success response. Http response code: 400.
Iternal ID: 01JP2BDC1NA7BXPTCTRWA2KPX1
Pretty hard to read as a single line, here’s the first one formatted a little nicer:
Mar 11, 07:14:29 AM:
a5c25405 ERROR Unhandled Promise Rejection
{
"errorType": "Runtime.UnhandledPromiseRejection",
"errorMessage": "MongoServerSelectionError: Server selection timed out after 30000 ms",
"reason": {
"errorType": "MongoServerSelectionError",
"errorMessage": "Server selection timed out after 30000 ms",
"reason": {
"type": "ReplicaSetNoPrimary",
"servers": {},
"stale": false,
"compatible": true,
"heartbeatFrequencyMS": 10000,
"localThresholdMS": 15,
"setName": "atlas-wm3xpi-shard-0",
"maxElectionId": null,
"maxSetVersion": null,
"commonWireVersion": 0,
"logicalSessionTimeoutMinutes": null
},
"stack": [
"MongoServerSelectionError: Server selection timed out after 30000 ms",
" at Timeout._onTimeout (/var/task/node_modules/mongodb/lib/sdam/topology.js:278:38)",
" at listOnTimeout (node:internal/timers:581:17)",
" at process.processTimers (node:internal/timers:519:7)"
]
},
"promise": {},
"stack": [
"Runtime.UnhandledPromiseRejection: MongoServerSelectionError: Server selection timed out after 30000 ms",
" at process.<anonymous> (file:///var/runtime/index.mjs:1276:17)",
" at process.emit (node:events:530:35)",
" at emitUnhandledRejection (node:internal/process/promises:250:13)",
" at throwUnhandledRejectionsMode (node:internal/process/promises:385:19)",
" at processPromiseRejections (node:internal/process/promises:470:17)",
" at processTicksAndRejections (node:internal/process/task_queues:96:32)",
" at runNextTicks (node:internal/process/task_queues:64:3)",
" at listOnTimeout (node:internal/timers:545:9)",
" at process.processTimers (node:internal/timers:519:7)"
]
}
Mar 11, 07:14:29 AM:
[ERROR] [1741688069432] LAMBDA_RUNTIME Failed to post handler success response.
Http response code: 400.
I checked my source code and I can try to improve my connection to MongoDB, but the thing is that this issue started to occur when I upgraded my project to Next.js 15.
I have never experienced this issue before.