How to solve MongoError: pool destroyed while connecting to CosmosDB : <p>I have Node.js service in which I am using mongo-API to communicate with Document/Cosmos DB.
My service run's fine and performs all the crud operation but after 1 min some mongo error throws from the service.</p>

<pre><code>/document-db-service/node_modules/mongodb/lib/utils.js:123
    process.nextTick(function() { throw err; });
                                  ^
MongoError: pool destroyed
    at Pool.write (/document-db-service/node_modules/mongodb-core/lib/connection/pool.js:922:12)
    at Cursor._find (/document-db-service/node_modules/mongodb-core/lib/cursor.js:286:22)
    at nextFunction (/document-db-service/node_modules/mongodb-core/lib/cursor.js:584:10)
    at Cursor.next [as _next] (/document-db-service/node_modules/mongodb-core/lib/cursor.js:692:3)
    at fetchDocs (/document-db-service/node_modules/mongodb/lib/cursor.js:856:10)
    at toArray (/document-db-service/node_modules/mongodb/lib/cursor.js:883:3)
    at Cursor.toArray (/document-db-service/node_modules/mongodb/lib/cursor.js:836:44)
    at exports.getDocsOfCollections (/document-db-service/services/collections.js:273:10)
    at Layer.handle [as handle_request] (/document-db-service/node_modules/express/lib/router/layer.js:95:5)
    at next (/document-db-service/node_modules/express/lib/router/route.js:137:13)
</code></pre>

<p>I am not able to understand why this error is coming up.Please suggest the changes that need to be done to resolve this error.</p>
