Receive Buffer Was Full

[atoff]

Hi all

My scenario: I am using AdsNotifications running with the ServerCycle transmission mode, at 1kHz. I have setup notifications for around 113 REALs. I'm running the latest pyads on Linux, with a Beckhoff IPC the PLC I am subscribing to.

Everything is working great, but over time (after maybe around 2 minutes of running), or if I increase the number of symbols I am subscribing too, I start getting this message in the stdout:

As a by product, in my stored notification responses, I get regular dropouts when this message starts up.

As far as I can work out, I think this is happening in the DLLs client side (given the port 30000), as I can't find this message in the pyads source code. I've used the official Beckhoff ADS .NET library in C# to try and compare, and I am able to subscribe to 200+ notifications just fine.

I've verified that my python loop is running at around 0.04 to 0.06s generally per cycle. Increasing a time/thread sleep seems to make the behaviour onset faster.

I'm wondering if anyone has seen this before, or knows of any work arounds to optimize this?