In my processlist, I see a long running process. There is no query, just the command "Field List" with an empty info column. Its been waiting almost 20 minutes on a table meta data lock on an unspecified table.
Googling for "MySQL command Field List" hasn't returned anything useful. Can someone tell me what this command is trying to do and what may have caused it?
Using MySQL 5.6.35 on a CentOS 6 box