"This means 'nofile' (which is the file descriptor limit for that user) is not unlimited but limited to 65535."
Since, xtrabackup doesn't check that mysqld variable (from my.cnf, lp:1183793 is for that), so in this case only the shell's ulimits should apply here.
"This means 'nofile' (which is the file descriptor limit for that user) is not unlimited but limited to 65535."
Since, xtrabackup doesn't check that mysqld variable (from my.cnf, lp:1183793 is for that), so in this case only the shell's ulimits should apply here.