Issue 536#0: *3084 upstream timed out (110: Connection timed out) while SSL handshaking to upstream

[nethum shan]

i'm getting this error when i see my error logs in plesk panel. and when i got this site freeze,

536#0: *3084 upstream timed out (110: Connection timed out) while SSL handshaking to upstream


can anyone help me to fix this

 

[IgorG]

Try to use this solution Website is inaccessible: 504 Gateway Timeout

 

[Jan Bludau]

the time-out could also be caused by mysql / mariadb 100% CPU.