[aerogear-dev] Using Let's encrypt SSL certificates with Java sender API

Hi, just want to let you know that you might hit a problem using an official certificate from Let's encrypt ( https://letsencrypt.org/ ) in Wildfly Applicationserver for securing UPS-console. Sending messages directly from within the UPS-console and with curl works. But using the Java sender API does not and leads to the following exception: http://pastebin.com/0BAPK2kw The following software environment was used: - Wildfly Full 9.0.2.Final - JDK 1.8.0_74-b02 - UPS 1.1.0.Final - UP-Java-Client-1.1.0.Final The reason for this, as it seems, is that the root ca certificate for Let's encrypt is not included in the cacerts of the original JDK from Oracle. As a workaround you can just copy the cacerts from an actual OpenJDK (Tested with OpenJDK-6 from Ubuntu 14.04) to $JAVA_HOME/jre/lib/security/. Most preferably make a copy of the original file before. :-) Maybe this is useful for somebody else. Cheers, Sascha