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Type:
Bug
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Resolution: Gone away
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Priority:
Major - P3
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None
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Affects Version/s: 3.5.5
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Component/s: None
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We are using MongoDB atlas in our node application.
We first started seeing the server selection timeout issue in November 2019 and it was fixed in version 3.3.4 Ticket : NODE-2249
Then we didn't see the issue for like 3-4 months but again in April 2020 we started seeing the same issue and it was fixed in 3.5.5 NODE-2467
After that, starting 3 May we are again experiencing the same issue. Here is the error stack trace.
MongooseServerSelectionError: Server selection timed out after 30000 ms at new MongooseServerSelectionError (/app/node_modules/mongoose/lib/error/serverSelection.js:22:11) at NativeConnection.Connection.openUri (/app/node_modules/mongoose/lib/connection.js:823:32) at Mongoose.connect (/app/node_modules/mongoose/lib/index.js:333:15) at Database.db_connect (/app/database/mongoose.js:14:38) at new Database (/app/database/mongoose.js:9:10) at Object.<anonymous> (/app/database/mongoose.js:23:18) at Module._compile (internal/modules/cjs/loader.js:778:30) at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10) at Module.load (internal/modules/cjs/loader.js:653:32) at tryModuleLoad (internal/modules/cjs/loader.js:593:12) at Function.Module._load (internal/modules/cjs/loader.js:585:3) at Module.require (internal/modules/cjs/loader.js:692:17) at require (internal/modules/cjs/helpers.js:25:18) at Object.<anonymous> (/app/server.js:6:1) at Module._compile (internal/modules/cjs/loader.js:778:30) at Object.Module._extensions..js (internal/modules/cjs/loader.js:789:10)
Please note : If we redeploy the application or restart the service then issue is resolved temporarily.
Mongoose version : v5.9.5
MongoDB version (as used by mongoose ): v.3.5.5
Here is the result of db.isMaster() query:
{
"hosts" : [
"lnc-saas-prod-shard-00-00-d8efw.gcp.mongodb.net:27017",
"lnc-saas-prod-shard-00-01-d8efw.gcp.mongodb.net:27017",
"lnc-saas-prod-shard-00-02-d8efw.gcp.mongodb.net:27017"
],
"setName" : "LNC-SaaS-PROD-shard-0",
"setVersion" : 2,
"ismaster" : true,
"secondary" : false,
"primary" : "lnc-saas-prod-shard-00-00-d8efw.gcp.mongodb.net:27017",
"tags" : {
"region" : "CENTRAL_US",
"provider" : "GCP",
"nodeType" : "ELECTABLE"
},
"me" : "lnc-saas-prod-shard-00-00-d8efw.gcp.mongodb.net:27017",
"electionId" : ObjectId("7fffffff000000000000000d"),
"lastWrite" : {
"opTime" : {
"ts" : Timestamp(1588685494, 2),
"t" : 13
},
"lastWriteDate" : ISODate("2020-05-05T13:31:34Z"),
"majorityOpTime" : {
"ts" : Timestamp(1588685494, 2),
"t" : 13
},
"majorityWriteDate" : ISODate("2020-05-05T13:31:34Z")
},
"maxBsonObjectSize" : 16777216,
"maxMessageSizeBytes" : 48000000,
"maxWriteBatchSize" : 100000,
"localTime" : ISODate("2020-05-05T13:31:36.112Z"),
"logicalSessionTimeoutMinutes" : 30,
"minWireVersion" : 0,
"maxWireVersion" : 7,
"readOnly" : false,
"ok" : 1,
"operationTime" : Timestamp(1588685494, 2),
"$clusterTime" : {
"clusterTime" : Timestamp(1588685494, 2),
"signature" : {
"hash" : BinData(0,"9FDzNNxXpox7+6HW629It7NKzoU="),
"keyId" : 6761765291258020000
}
}
}