Sphinx error after server update
I just discovered that the search functionality on my web site doesn't work. Going through some logs, I find this:
Error connecting to Sphinx via the MySQL protocol. Error
connecting to Sphinx via the MySQL protocol. Can't connect to MySQL server on '127.0.0.1'
[Sat Mar 24 01:56:16.713 2018]  rotating indices (seamless=1)
[Sat Mar 24 01:56:16.730 2018]  rotating index 'listingdelta': started
[Sat Mar 24 01:56:16.738 2018]  rotating index 'listingdelta': success
[Sat Mar 24 01:56:16.738 2018]  rotating index: all indexes done
[Tue Mar 27 10:28:26.365 2018]  caught SIGTERM, shutting down
[Tue Mar 27 10:28:26.926 2018]  shutdown complete
<and then nothing after March 27th>
I'm trying rake ts:restart, reindex, stop, start etc, but then I get error messages like this:
ActiveRecord::AdapterNotSpecified: 'development' database is not configured. Available: ["production"]
/path/to/file/environment.rb:17:in `<top (required)>'
Tasks: TOP => ts:index => environment
Everything worked fine before, but all of a sudden this search eror started to occur, and since the last line in the searhd log file is dated March 27, I suspect the behaviour is related to the upgrade.
Any hints on steps to resolve it?