error: cannot read property 'on' of undefined about node-red-contrib-mssql-plus

[bombjackit]

I had same error but quite often when I deploy : in my case this problem crashed nodered for uncaught exception

[info] [MSSQL-CN:Virtual] Error connecting to server : XXXXXXXX, database : YYYYYYYY, port : ZZZZ, user : KKKKKKKKK
[info] [MSSQL] TypeError: Cannot read properties of undefined (reading 'on')
[red] Uncaught Exception:
[error] ConnectionError: Connection not yet open.
at ConnectionPool._acquire (S:.node-red\node_modules\mssql\lib\base\connection-pool.js:380:36)
at ConnectionPool.acquire (S:.node-red\node_modules\mssql\lib\base\connection-pool.js:366:56)
at Immediate. (S:.node-red\node_modules\mssql\lib\tedious\request.js:419:19)
at process.processImmediate (node:internal/timers:476:21)

I use nodered 3.1.0 on windows 2012 R2 server x64
node-red-contrib-mssql-plus is at version 0.12.1
mssql 10.0.1
node.js 18.18.2

[bombjackit]

Going deeper to the problem, I discover that in my case the problem was originitade in this line

node-red-contrib-mssql-plus/src/mssql.js

Line 440 in 64f78f4

result = await req.query(sqlQuery);

and the problem was fired if during stopping flow this node is inside that function.

In this link there is the function that is called (if I am not wrong) https://github.com/tediousjs/node-mssql/blob/ac350e44c143adc9fbb04b9cddca221746308dd4/lib/base/connection-pool.js#L606

In my case arguments[0] === 'string'

[bombjackit]

I have added a pull request (tediousjs/node-mssql#1592) to fix this problem