Discuz! info: MySQL Query Error

Time: 2017-6-21 11:41pm
Script: /forum/forumdisplay.php

SQL: SELECT t.* FROM [Table]threads t
WHERE t.tid IN (9890270,9886355,4102660,9858851) AND t.displayorder IN (2, 3)
ORDER BY displayorder DESC, lastpost DESC
LIMIT 0, 4
Error: MySQL server has gone away
Errno.: 2006

Similar error report has beed dispatched to administrator before.