Building dizzy branch fails since mariadb version 5.3.39 is not anymore avalible from web servers
The mariadb recipe is in meta-oe, and I'm afraid the Yocto Project doesn't generally maintain recipes in that layer. In general issues with meta-oe specifically should be reported to the openembedded-devel@lists.openembedded.org mailing list so that someone there can look into it. In this specific case, some folks in the OpenEmbedded community are putting together a larger source mirror that will avoid issues like this (as the Yocto Project already does for recipes in OE-Core); I have just asked for an update on that effort.