Service provider definition missing

[coladict]

The final jar is supposed to have a file named META-INF/services/javax.json.spi.JsonProvider containing only

com.github.pgelinas.jackson.javax.json.spi.JacksonProvider

I know you've described a way to do it manually in the main page, but you should just have it loaded, and it will override the default Glassfish implementation if loaded. That one becomes a fallback, in case another one isn't found.