Sometime during late in the evening of the 5th of February 2020 (GMT+2), all of my pistons which were sending me notifications via my own Telegram bot have stopped working with the following error:
Error executing external web request: javax.net.ssl.SSLHandshakeException: Received fatal alert: handshake_failure
The url gets calculated correctly - when i copy the calculated url from the logs and manually visit in Chrome it works. The pistons have been working like this for many months - actually the last message that passed through was at 19:20 on 05/02/2020 (GMT+2).
There does not seem to be any issues with the certificate of api.telegram.org (it has been active since May18 and expires May20). I did no changes to the piston’s code, the certs seems to not have changed so I am at a loss!