#5810 - MySQL lockout: Commands out of sync; you can't run this command now

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Identifier #5810
Issue type Major issue (breaks an entire feature)
Title MySQL lockout: Commands out of sync; you can't run this command now
Status Completed
Tags

Roadmap: v11 (custom)

Handling member PDStig
Version 11 beta1
Addon core
Description If web notifications for errors get too large, it can seemingly lock out the entire site with the MySQL error "Commands out of sync; you can't run this command now"

This happens on any/every page load specifically with the query SHOW TABLES LIKE cms11_

I unfortunately cannot investigate further; I can't even access the errors / stack traces to see what is happening because they're so large.
Steps to reproduce

Related to

#5809 - Poller can trigger PHP memory errors if there are lots of notifications

Funded? No
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