Performance Testing - Rasa Connector ESOCKETTIMEDOUT

As I understand, the rasa connector sends requests to the rasa API and sockets are not involved here. However, many tests are failing while doing performance testing with the following error:

“error sending to bot - rest request failed: ESOCKETTIMEDOUT”

Why are there errors related to socket timeouts if there is no socket connector used? And what exactly does this error mean?

With all kind of TCP network traffic, including HTTP, Websockets,, there are network sockets involved (OSI layer 4). We are currently trying to find out if a high number of open sockets (high number of parallel requests) can lead to client-side ESOCKETTIMEDOUT issues.