Node-Red from 172.16.10.1: Client unable to keep up with pending messages. Reached 4096 pending messages. The system's load is too high or an integration is misbehaving;

General
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1

On Home Assistant startup, there is always an error like this pops up:

2026-01-07 22:23:49.254 ERROR (MainThread) [homeassistant.components.websocket_api.http.connection] [140711007067392] Node-Red from 172.16.10.1: Client unable to keep up with pending messages. Reached 4096 pending messages. The system's load is too high or an integration is misbehaving; Last message was: b'{"type":"event","event":{"a":{"device_tracker.unifi_default_ce_7f_02_83_2d_9e":{"s":"not_home","a":{"source_type":"router","mac":"ce:7f:02:83:2d:9e","host_name":"","oui":"","friendly_name":""},"c":"01KED8Y7G6V52A81RD7TEH41AH","lc":1767824629.2545705}}},"id":7}'

What can I do to get rid of it?

Environment:
Node-RED Version: 4.1.3: Maintenance Release
Node-RED Installation: Docker image nodered/node-red:latest
Home Assistant Core Version: 2025.12.5
Home Assistant Frontend Version: 20251203.3
Node-RED Companion Version 4.2.2
Home Assistant Installation: Docker image linuxserver/homeassistant:latest

2

Did you search for that entity in your flows? It could be a loop. Switch the debug tab to info and search device_tracker.unifi_default_ce_7f_02_83_2d_9e. If you can't get into node red, start in safe mode.

Another possibility is using a misconfigured events all node.

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1 Like
3

Thanks for your reply.

I have no flow regarding the node device_tracker.unifi_default_ce_7f_02_83_2d_9e nor an events all node.

I aware that the last message seems to be always device_tracker.unifi_default_ce_7f_02_83_2d_9e.

Could elaborate about how to get the steps towards 'switch the debug tab to info'? Is it Node-RED WebUI->hamburger menu at top right->View->Debug messages?

4

Are you using [Guide]Unifi device tracker / presence detection with Node Red - Share your Projects! - Home Assistant Community or node-red-contrib-unifi (node) - Node-RED?
If so then that is likely where the message is coming from.

Is the HA startup error always the same (including the unifi bit)?

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5

Hi.

I am pretty sure this is a Home Assistant Issue (or a HA plugin) and not a Node-RED thing.

I would start by looking through the below for clues...

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6

If you click the i button, it will show a search box that you can use to search your flows.

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In that same location, choose the config option. Look for the home assistant server node. There should only be one entry. If there are multiple delete the extras. You may need to open and close the nodes that were using the extra servers.

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1 Like
7

Thanks for your help.

However, I have not installedany unifi related nodes as shown below:

Screenshot 2026-01-08 at 22.10.53
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HA startup always has this error while starting up and the last error is always "device_tracker.unifi_default_4a_21_61_55_95_38" as well.

8

Thanks for your help.

The node device_tracker.unifi_default_4a_21_61_55_95_38 does not exist on the 2 flows I have.

On the other hand, I do have 2 instances of HA's connect to Node-RED. The main reason is that I would like to pass some entities from one of them to the other.

9

You are definitely right. It is the fault of UniFi Network integration. The UniFi Network integration has created thousands of devices and entities. I guess they are created by the docker containers I created and updated over the years.

There is no way to remove those devices and entities other than deleting the integration and add again.

The error was gone from startup after I removed the UniFi Network integration and add again.

4 Likes
10

Unifi can be reconfigured at anytime without removing it. On the integration page click the gear icon. That will bring up the config options. It sounds like during setup you checked the box to create tx and rx entities.

If unchecked the entities are still created but they will all be disabled. You can then enable them on an as needed basis.

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