XF 1.3 500 internal server error?

when working ../admin.php?tools/run-deferred while move threads to other forum.
Processing then give me error? why is the reason? when i refresh the page again contiune..


XenForo moderator
Staff member
Disable any add-ons and try again.

A 500 error is very generic.
Check the server error log to see if there is any indication as to what caused it.
i don't use any plugin. i checked error from admin;

 Zend_Db_Statement_Mysqli_Exception: Mysqli statement execute error : Lock wait timeout exceeded; try restarting transaction - library/Zend/Db/Statement/Mysqli.php:214


XenForo developer
Staff member
It likely indicates another process held a lock too long. You should be able to restart the process (or worst case, redo it).