The MongoDB nodes do not respond properly with large numbers of documents.

[Denkard]

Bug Description

When using MongoDB nodes, I repeatedly encountered the following situation:

I'm only using the basics, nothing too complex:

The node delivers what it promises, but after completing executions, it no longer responds:

To Reproduce

Any large operation with MongoDB nodes

Expected behavior

The node should finish the execution and continue after the requests.

Operating System

Ubuntu 22.04 (Jammy) in Docker Conteiner

n8n Version

1.55.3

Node.js Version

v20.15.0

Database

SQLite (default)

Execution mode

main (default)

[Joffcom]

Hey @Denkard,

We have created an internal ticket to look into this which we will be tracking as "GHC-210"

[Joffcom]

Hey @Denkard,

I don't fully understand the issue here, Does the node work and the UI just crashes or does the node stop working? With that many items I would expect the UI to freeze so it may be better to use sub worklfows and split your data up into smaller batches to process.

[Denkard]

Hi @Joffcom ! Thanks for the response!

The node stops responding with large amounts of items, regardless of whether it's running through the UI or in the background. The node simply stops responding. I was able to work around the problem by limiting the number of documents and calling the same workflow again.

[Joffcom]

Hye @Denkard,

I wonder if the instance is running out of memory, Does it show any errors when it stops?