MySQL Bugs: #72870: Backport bug#18008907 to 5.5+ versions.

Bug #72870	Backport bug#18008907 to 5.5+ versions.
Submitted:	4 Jun 2014 12:01	Modified:	30 Jun 2014 13:44
Reporter:	Praveenkumar Hulakund	Email Updates:
Status:	Closed	Impact on me:	None
Category:	MySQL Server: Locking	Severity:	S2 (Serious)
Version:	5.5	OS:	Any
Assigned to:		CPU Architecture:	Any

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Description:
Since it is a deadlock issue and it exists in 5.5+ versions, backport it to 5.5+.

How to repeat:
Please see bug#18008907 description.

Noted in 5.5.39, 5.6.20 changelogs.

Deadlock could occur if three threads simultaneously performed
INSTALL PLUGIN, SHOW VARIABLES, and mysql_change_user().