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#1

It’s the little things, like helping to understand an error before posting here.

QUESTION:

What do you make of this error?

Connection terminated unexpectedly\n at Connection. (/opt/node_app/node_modules/pg/lib/client.js:132:73)\n at Object.onceWrapper (node:events:628:28)\n at Connection.emit (node:events:514:28)\n at Socket. (/opt/node_app/node_modules/pg/lib/connection.js:63:12)\n at Socket.emit (node:events:526:35)\n at TCP. (node:net:323:12)"

ANSWER:

This error is indicating that your application’s connection to the PostgreSQL database was unexpectedly terminated. Here’s a breakdown of what might be happening:

  1. /opt/node_app/node_modules/pg/lib/client.js:132:73 : This is where the error is being thrown. It’s inside the pg module, which is a PostgreSQL client for Node.js. The error is being thrown at line 132, character 73, of the client.js file.
  2. at Connection.<anonymous> and at Socket.<anonymous> (/opt/node_app/node_modules/pg/lib/connection.js:63:12) : This is showing you the call stack at the time of the error. It’s saying that the error originated from an anonymous function within the Connection object (which represents the connection to the database) and at the socket level which is lower level of network communication.
  3. Object.onceWrapper (node:events:628:28) and Socket.emit (node:events:526:35) : These are internal Node.js events associated with the error.
  4. TCP.<anonymous> (node:net:323:12) : This is the lowest level listed in the call stack, indicating that the error occurred at the TCP level.

This type of error usually happens when the database server shuts down, restarts, or otherwise closes the connection while your Node.js application is still trying to interact with it. It could be due to a network hiccup, a server crash, or the server being overloaded and killing idle connections.

To start troubleshooting:

  • Check your database server logs for any signs of problems around the time this error occurred.
  • If your database server is on a different host from your Node.js application, check the network connectivity between the two hosts.
  • If your database connection is idle for a long time, it may be closed by the database server. You may need to add logic in your application to handle reconnections.
  • Check if your Node.js application is correctly handling disconnections. The pg module should emit an ‘error’ event when the connection is lost, which your application can listen for and respond to by creating a new connection or gracefully shutting down.
  • You could also consider using a connection pool, which can help manage connections and handle errors. The pg module has built-in support for connection pooling.
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#2

Subscribe to have your mind totally blown away!

:smile:

#3

Oh, I am. :nerd_face: Already playing with Code Interpreter.

I also watched this and was blown away by Flowise and LangChain. Trying to think of ways to build it into apps.

It would be really cool to have Flowise used as Wappler’s visual flow editor. It has an MIT license. @George wink wink

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