The following error appeared upon upgrading JRuby:
OpenSSL::X509::StoreError: setting default path failed: Invalid keystore format
wget http://curl.haxx.se/ca/cacert.pem
sudo keytool -importcert -file cacert.pem -keystore /Users/youruser/.keystore
export SSL_CERT_FILE=/Users/youruser/.keystore
jruby -S gem install whatever
When I use this method, other tools on my system begin failing with SSL errors, such as the heroku tool belt. Can anyone explain that?