Today we started serving an important set of directories on ftp.mozilla.org using Amazon S3, more details on that over in the newsgroups. Some configuration changes landed in the tree to make that happen.

Please rebase your try pushes to use revision 0ee21e8d5ca6 or later, currently on mozilla-inbound. Otherwise your builds will fail to upload, which means they won’t run any tests. No fun for anyone.

https://ftangftang.wordpress.com/2015/10/21/try-server-please-use-up-to-date-code-to-avoid-upload-failures/