List of steps to reproduce (step by step, including full links if applicable):
Cannot be consistently reproduced. I am hoping that those with Grafana accessing can identify the cases and help investigate more.
What happens?:
User:Mojtabakd reported on fawiki that while trying to save a page, he received the error message "upstream connect error or disconnect before headers".
This error message is found on line 67 of ElasticaErrorHandlerTest.php in Extension:CirrusSearch source code but note that this is a unit test script, and not part of the core code of the extension.
What should have happened instead?:
If the error truly is being raised by a unit test, then it should never be shown to users in Production.