After a full backup with the innobackupex script with the options --compress --compress-threads=4 --parallel=4
using xtrabackup 2.1.4 64 x86_64 on a MariaDb 5.5.32
The sys_exec() UDF always returns -1 and does not execute the command between the brackets (https://github.com/mysqludf/lib_mysqludf_udf#readme)
The function is still registered
recreating the function with drop/create shows no errors but doesn’t help
The logs show nothing, restarting the db does fix the problem
Does anyone know how to fix this?