function readOnly(count){ }
Starting November 20, the site will be set to read-only. On December 4, 2023,
forum discussions will move to the Trailblazer Community.
+ Start a Discussion
TerminusbotTerminusbot 

All Apex Callouts Across Production Experiencing Error: System.CalloutException: Read timed out

Did anything change in Salesforce over the weekend? Across all of our Apex Call Outs we are now getting this error:

System.CalloutException: Read timed out

Could this be associated with the new TLS requirements? Anyone else experiencing something like this? 

Thanks,
Ricky 
Cloud AtlasCloud Atlas
Is your environment compatible with TLS 1.1 or higher??
The only thing Salesfroce changed recently was to deactivate TLS 1.0 across all instances.
They were sending notices for the last two years about it as it was happening in stages all over globe.

Make sure thats not the case.
https://help.salesforce.com/servlet/servlet.FileDownload?file=0150M000003KgGkQAK

Other than that I cannot say what might be the cause.
Hope this helps.
Cheers!