Error: cluster object was closed

Node.js SDK
1

I am simulating a retrieve function from our database in couchbase and when I try to retreive the data it is showing me this. I’ve search throughout the net on how to solve this but found none.

Here is the error

Error --------------------------------------------------

Error: cluster object was closed
at Connection.close (/Users/franzdayrit/_Nobel systems/Projects/valencia-billing/node_modules/couchbase/lib/connection.js:266:24)
at /Users/franzdayrit/_Nobel systems/Projects/valencia-billing/node_modules/couchbase/lib/cluster.js:612:14

Here is my code using serverless along with couchbase and nodejs

handler.js:

'use strict';

const couchbase = require('couchbase');

//Create base Cluster connection
let cluster = new couchbase.Cluster("couchbase://xxx", {
  username: "xxx",
  password: "xxx"
});

let bucket = cluster.bucket('xxx');

module.exports.retrieve = (event, context, callback) => {
  let qs = "SELECT * FROM xxx WHERE billstatus = 'paid'"
  cluster.query(qs, (error, result) => {
    if(error) {
      return callback({
        statusCode: 500,
        body: JSON.stringify({
          code: error.code,
          message: error.message
        })
      }, null)
    }
    callback(null, {
      statusCode: 200,
      body: JSON.stringify(result)
    })
  })
}

serverless.yml:

service: xxx

frameworkVersion: '2'

provider:
  name: aws
  runtime: nodejs12.x

functions:
  hello:
    handler: handler.hello
    events:
      - http: GET hello
  retrieve:
    handler: handler.retrieve
    events:
      - http: GET retrieve


plugins:
  - serverless-offline
2

Hello @aeo03 welcome to the forums !

What is your environment ? Is it on AWS Lambda (looking at serverless.yml) ? And what version of SDK are you using ?

3

Hi @AV25242 thanks for replying,

As of now, I’m creating a mini app in my local machine. So it is just local. For the SDK ver., I just installed in our CLI.

4

Thanks @aeo03 I am assuming that you using Couchbase SDK 3.x

I see you are not awaiting on the query part and are using callbacks remember SDK 3.x uses promise
I am assuming you have the right indexes on billstatus and your query returns faster when tried using Couchbase Query workbench

try { let query = "SELECT * FROM xxx WHERE billstatus = 'paid'" let result = await cluster.query(query) console.log("Result:", result) return result } catch (error) { console.error('Query failed: ', error) }

so to avoid any confusions the latest version of Couchbase Node.js SDK is 3.1, if possible for you to download that and use (may not be needed but doesn’t hurt) ?

5

Hi @AV25242

I have a similar problem but is intermittent. Me use a diagnostics to check if cluster are connected:

    const cluster = new couchbase.Cluster(cString, {
        username,
        password,
        kvTimeout: opTimeout,
        connectTimeout: connTimeout
    });

    const bucket = cluster.bucket(bucketName);
    const collection = bucket.defaultCollection()


    cluster.diagnostics().then(res => {
        console.log('connect');
    }).catch(err => {
        console.log('error', err.stack);
    });
6

@laurentiustroia welcome to the forums.

Your issue is related to Cluster closed - reinitialize connection? - #3 by mmiguel89

There is an issue created to fix this problem.

7

Hi, thank you.

Look very similar with that problem, but in my cases the couchbase server is up and running before app, so I exclude a delay until couchbase are starting, but a strang behaviour is if I restart that app then all working perfectly. Can be another delay until the connection is established and that work to be cached somewhere and when restart just reuse it ?

If a retry mechanism will be implemented in 3.1.1 would be great.

8

It’s a bit sad that I run into this problem following Install and Start Using the Node.js SDK with Couchbase Server | Couchbase Docs
Has this not been tested?

9

Hi Mike_Reys can you please let us know what is that which was not working for you ? error etc ?