Problem

In a distributed setup, you encounter the following problems on the central site.:

The GUI on the central site randomly becomes very slow, and the "liveproxyd.log" gets filled with hundreds of these entries:

2021-09-30 16:24:45,502 [40] [cmk.liveproxyd.(5252).Site(<remote_site_name>).Client(81)] Reading request from client took longer than 5s
Traceback (most recent call last):
File "/omd/sites/mysite/lib/python3/cmk/cee/liveproxy/Client.py", line 150, in receive_new_request
request = self._receive_request()
File "/omd/sites/mysite/lib/python3/cmk/cee/liveproxy/Client.py", line 339, in _receive_request
raise ClientRequestTimeoutException(
cmk.cee.liveproxy.Client.ClientRequestTimeoutException: Reading request from client took longer than 5s

Solution

It seems the livestatus is bombarded with hundreds of requests per second.

You probably might find this one:

Reading requests from client took longer than 5s

This is caused by the GUI, which establishes a connection with the Liveproxyd but then does not send any query. This could indicate an overload of either the GUI or Liveproxyd.

If the werk mentioned above is the cause, this workaround might also help before installing p9:

Remove all Host/Service Statistics Snapins in all dashboards
Save them
Re-add them
Then reload all dashboards in the browser.

If this does not work, please open a ticket and add the ~/var/log/apache/access_log of some of the affected sites, which might show many entries like

"ajax_figure_dashlet_data"

Related articles

Page:

How to collect troubleshooting data for various issue types
Page:

How-to adjust Checkmk performance
Page:

How to use cmcdump
Page:

Contact groups in distributed monitoring
Page:

Changing a remote site to become the central

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