there are a number of errors on the puppetmaster with the following error message
Jun 17 00:01:15 puppetmaster1001 puppet-master[30871]: Error encoding a 'replace catalog' command for host 'sessionstore1001.eqiad.wmnet' ignoring invalid UTF-8 byte sequences in data to be sent to PuppetDB, see debug logging for more info
This is error is occurring with many hosts not just sessionstore1001.eqiad.wmnet'
On the agent we see the following message when performing an agent run which may be related
Info: Unable to serialize catalog to json, retrying with pson