connection-manager | 替代连接池的连接管理器，借助threadlocal提升并发能力，前提是在线程数量不多的情况下

I'm currently having a problem that i'm unable to solve. This is only in extreme cases, when the server, for some reason, goes offline, messages accumulate (100k or more) and then they need to be processed all at the same time. Even though i'm planning for this never to happen, i would like to have a backup plan for it and more control on this issue. I'm running an NestJS microservice against a RabbitMQ broker to get messages that arrive from IOT devices and insert them into a MySQL database. Every message has a little conversion/translation operation that needs to be done before the insert. This conversion is based on a single row query done against a table on the same SQL Server.

The order is the following:

• read message;
• select 1 row from database (table has few thousand rows);
• insert 1 row into the database;

Now, i'm facing this error:

So I have an angular project that is erroring out and in need of some 'polyfilling' as it were. Since Angular does not allow editing of the webpack.config.js file without exporting it I figured the expected intent would be for the developer to edit the polyfill.ts file. Now the polyfill.ts in the src folder does recognize the keyword 'resolve' as it is imported from dns in this manner:

I was trying to bundle a nestjs application to run it in a lambda. But gave up. After a while I tried to do the same with a freshly created nestjs application that connects to mysql. The problem was that sequelize requires mysql2 this way:

I've run into a roadblock trying to get my web app to run on a Windows Azure App Service.

My app has a Node.js/Express back-end written in TypeScript (compiled with tsc, not Webpack) and uses Sequelize to connect to a SQLite 3 database, stored locally. The front-end is a React app built on Create React App.

The problem is that when sequelize tries to require sqlite3, a MODULE_NOT_FOUND error occurs, causing sequelize to throw a "Please install sqlite3 package manually". (See full stack trace below.)

The sqlite3 folder with the expected files is clearly present in the node_modules folder in the Azure file system, so I really don't get how require("sqlite3") could be failing.

Here's what I've tried so far:

1. I tried pretty much every suggestion in this sequelize issue.
2. I searched StackOverflow, but most of the questions relate to Electron, which I'm not using. Nonetheless, I read most of them, and tried any of the suggestions that seemed relevant.
3. I made sure the version of node on my development machine is the same as on my Azure Window App Service (14.16.0).
4. I tried deleting the node_modules folder and running npm install --production using the Azure console.
5. I tried running npm rebuild from the Azure console.
6. I tried running npm cache verify from the Azure console.
7. I tried globally installing sqlite3 using npm install -g sqlite3 from the Azure console, but that action was forbidden by Azure.
8. I tried installing sqlite3 from the source using npm install sqlite3 --build-from-source.
9. I added console log statements to node_modules/sequelize/lib/dialects/abstract/connection-manager.js to verify that the module name passed to the require statement was "sqlite3", and it was.
10. I tried replacing moduleName with the actual string, "sqlite3".
11. I checked to make sure all the sqlite3 files in my App Service file listing matched the ones installed on my development machine.
12. I probably tried a lot of other things I'm not remembering right now!

Needless to say, none of these things made any difference. Every time I checked the logs, the error was the same (and I checked the timestamps to make sure the logging system was actually working.)

Here is the full stack trace:

Error: Please install sqlite3 package manually

• at ConnectionManager._loadDialectModule (C:\home\site\wwwroot\node_modules\sequelize\lib\dialects\abstract\connection-manager.js:84:23)
• at new ConnectionManager (C:\home\site\wwwroot\node_modules\sequelize\lib\dialects\sqlite\connection-manager.js:24:21)
• at new SqliteDialect (C:\home\site\wwwroot\node_modules\sequelize\lib\dialects\sqlite\index.js:15:30)
• at new Sequelize (C:\home\site\wwwroot\node_modules\sequelize\lib\sequelize.js:340:20)
• at new Sequelize (C:\home\site\wwwroot\node_modules\sequelize-typescript\dist\sequelize\sequelize\sequelize.js:16:9)
• at getSequelize (C:\home\site\wwwroot\getDatabaseInfo.js:33:16)
• at Object.getDatabaseInfo [as default] (C:\home\site\wwwroot\getDatabaseInfo.js:15:23)
• at Object. (C:\home\site\wwwroot\server.js:55:47)
• at Module._compile (internal/modules/cjs/loader.js:1063:30)
• at Object.Module._extensions..js (internal/modules/cjs/loader.js:1092:10)
• at Module.load (internal/modules/cjs/loader.js:928:32)
• at Function.Module._load (internal/modules/cjs/loader.js:769:14)
• at Module.require (internal/modules/cjs/loader.js:952:19)
• at Module.patchedRequire [as require] (C:\PROGRA~2\SITEEX~1\APPLIC~1\28F926~1.41\nodejs\node_modules\diagnostic-channel\dist\src\patchRequire.js:15:46)
• at require (internal/modules/cjs/helpers.js:88:18)
• at Object. (C:\Program Files (x86)\iisnode\interceptor.js:459:1)

What else can I try?

I'm currently trying to create a functional query from the database to post it into a created a csv file, however I am unable to connect to the PSQL host programmatically. So what I am trying to do is :-

1. Connect to DB and query results
2. Push results to an Excel File
3. Continue()
4. SFTP Results to myself on SFTP Server and place file in directory.

I am able to connect to the PostgresDB manually by the following in CLI:-

1. ssh username@xx.xx.xx.xx //Doesnt need password because my id_rsa key is stored on the Server
2. psql -U username -h LOCALHOST -p 5432 -d databasename pass- password (Manually input)

Furthermore, connecting through Visual Studio Code works as well however I need to connect to the server (Remote Connection) and then connect to the Database using a postgres Driver.

After investigating it, I figured I firstly need to connect using SSH to the server, then and only then I will be allowed to access the Database.

This is how I approached it through Code :-

Index.js

Trying to submit a sqoop job to dataproc to export data from a postgres database following the article: https://medium.com/google-cloud/migrate-oracle-data-to-bigquery-using-dataproc-and-sqoop-cd3863adde7b

It is erroring out with: org.postgresql.util.PSQLException: SSL error: java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.

This is the command I am trying to submit (variables have been appropriately set):

On my Ubuntu 18.04, I have this desktop file:

I need serious help. My Heroku app crash a week ago and I have been troubleshooting for 3 days with no success. Tried to change the connection code to ssl and also did some changes to pg_hba.conf and postgresql.conf files but no luck.
this is the error that keep comming up :

Hi!I need serious help. My Heroku app crash a week ago and I have been troubleshooting for 3 days with no success. Tried to change the connection code to ssl and also did some changes to pg_hba.conf and postgresql.conf files but no luck.
this is the error that keep comming up :

Hello my fellow developers!

So I've been working on this app for a while now. I like to be up to date with the frameworks I use, so I regularly update when the frameworks release a new version. i.e. Angular 9 > 10. Angular 10 > 11.

So I just recently updated to Angular 11 and updated my nestjs and nx. And now when I try to serve my frontend app, Ivy seems to complain a lot.. but a.. lot... about modules that are not used in the frontend app.