Hi,
Ah, I just noticed YOU are the poster of that bug!
Merc.
On Thursday, 7 December 2017 12:36:44 UTC+8, christopher wrote:
>
> *Node.js version*: v4.2.6
> *OS*: Linux
> *Sql server*: 2012
>
>
> I have used node js to connect mssql database server. Data's are inserted
> into DB continuously
>
> But we are facing connection pool release exception sometimes.
>
> Find the code snippet and issue in below
>
> * Code:*
>
> var sql = require('mssql')
> var dbconfig = {
> server: 'xxxx',
> database: 'xxxx',
> user: 'xxx',
> password: 'xxx',
> port: 'xx'
> };
> try {
> sql.close();
> var connection = sql.connect(dbconfig, function (err) {
>
> if (err) console.log(err);
>
> var sqlquery = '';
> var request = new sql.Request();
> //query to the database and get the repo value
> sqlquery = 'select Repo from verylargetable';
> request.query(sqlquery, function (err, result) {
> if (err) console.log(err)
> var repo = result.recordset[0].Repo;
>
> //query to the database and get the commit value
> sqlquery = "select Commit from verylargetable where
> Repo='" + repo + "'";
> request.query(sqlquery, function (err, result) {
> if (err) console.log(err)
> var comm = result.recordset[0].Commit;
>
> //query to the database and update the table
> sqlquery = "UPDATE verylargetable set Repo='" + repo +
> "',
> WHERE Comm='" + comm + "'";
> request.query(sqlquery, function (err, result) {
> if (err) console.log(err)
> console.log("record(s) updated");
> });
> });
> });
> });
> }
> catch (e) {
> console.log("===========Exception Occurred==========");
> console.log(e);
> console.log(new Date().toString());
> console.log(
> "==========================================================");
> }
>
>
> *Issue:*
>
>
>
>
>
>
>
>
>
>
>
>
> * TypeError: Cannot read property 'release' of null at
> ConnectionPool.release
> (/usr/lib/Webhook/node_modules/mssql/lib/base.js:199:14) at
> Request.userCallback
> (/usr/lib/Webhook/node_modules/mssql/lib/tedious.js:608:25) at
> Request._this.callback
> (/usr/lib/Webhook/node_modules/tedious/lib/request.js:47:27) at
> Connection.message
> (/usr/lib/Webhook/node_modules/tedious/lib/connection.js:1401:27) at
> Connection.dispatchEvent
> (/usr/lib/Webhook/node_modules/tedious/lib/connection.js:687:45) at
> MessageIO.<anonymous>
> (/usr/lib/Webhook/node_modules/tedious/lib/connection.js:602:18) at
> emitNone (events.js:67:13) at MessageIO.emit (events.js:166:7) at
> ReadablePacketStream.<anonymous>
> (/usr/lib/EJ2Webhook/node_modules/tedious/lib/message-io.js:102:16) at
> emitOne (events.js:77:13) at ReadablePacketStream.emit (events.js:169:7)*
>
> How to resolve this exception and how to handle exception in query
> execution?
>
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