What is problem?

MariaDB 10.2 apt source repository for Ubuntu trusty, xenial, yakkety is corruppted, so we can't get MariaDB 10.2 source package anymore.

What is expected?

apt-get source succeeds.

What is actual situation?

apt-get source fails.

Why it fails?

I've noticed this issue on Travis-CI.

Here is the build error log on it.
https://travis-ci.org/mroonga/mroonga/jobs/225504750#L299

This issue is caused by empty metadata such as folows:

http://mirror.jmu.edu/pub/mariadb/repo/10.2/ubuntu/dists/trusty/main/source/Release
http://mirror.jmu.edu/pub/mariadb/repo/10.2/ubuntu/dists/trusty/main/source/Souces.gz

This error is not limited to above mirror only. I investigated some of other mirrors, but all of them contains same problems.