Any hints on how to find out possible causes of available Suitelets often becoming unreachable? I have a number of externally available (without login) Suitelets that have started throwing

SSS_CONNECTION_TIME_OUT

errors every day from http POST/GET requests. This has started a bit over a week ago. I've started digging a bit. Nothing of note to see on the Performance Health Dashboard. The SuiteScript Analysis page is interesting. I see in the logs that one Suitelet took 7 seconds to execute a few times, which is 10 times longer than usual, but I can't actually find these occurrences in the performance chart. I'll continue to look for clues, but would appreciate any tips.

Open a support ticket with netsuite

I'd check the log files on the suitelet, and the integration logs to see what is going on.

SSS_CONNECTION_TIME_OUT

is kinda weird

Being there... My case was as battk said, the timeout was a response outside of NetSuite

@battk Good point. I had a bit of a weird (inherited) setup with a wrapper suitelet that calls another suitelet that runs as administrator with nlapiRequestURL(), for some reason. This has worked without a hitch up for years, 'til now. I've simplified the code now and given it an appropriate role. I hope it makes a difference. Not clear why it became a problem in the first place though.