How to fix 'SSLHandshakeException: Received fatal alert: decode_error'?

Question

We have a java application that reads our customers public calendars - for example from google (https://calendar.google.com/calendar/ical/...) or icloud (webcal://p58-caldav.icl

Answer 1

I experienced this same exact issue yesterday with a Java application that tried to connect to https://apple.com:443. I found that a different JDK on a different (Docker) OS fixed the issue. In my specific case, OpenJDK on Alpine didn't work but other Dockerized OpenJDKs (like adoptopenjdk/openjdk11) worked fine.