MySQL Bugs: #110512: Contribution: Replace synchronized with ReentrantLock

Bug #110512	Contribution: Replace synchronized with ReentrantLock
Submitted:	27 Mar 2023 14:19	Modified:	9 Apr 17:11
Reporter:	OCA Admin (OCA)	Email Updates:
Status:	Closed	Impact on me:	None
Category:	Connector / J	Severity:	S3 (Non-critical)
Version:	8.0	OS:	Any
Assigned to:		CPU Architecture:	Any
Tags:	Contribution

Description:
This bug tracks a contribution by Bart De Neuter (Github user: bdeneuter) as described in http://github.com/mysql/mysql-connector-j/pull/95

How to repeat:
See description

Suggested fix:
See contribution code attached

Contribution submitted via Github - Replace synchronized with ReentrantLock (*) Contribution by Bart De Neuter (Github bdeneuter, mysql-connector-j/pull/95#issuecomment-1482985515): I confirm the code being submitted is offered under the terms of the OCA, and that I am authorized to contribute it.

Contribution: git_patch_1289073556.txt (text/plain), 498.25 KiB.

Hello Bart De Neuter,

Thank you for the report and contribution.

regards,
Umesh

Hi, as virtual threads are being released in a few weeks as part of JDK 21, I was wondering what the status was from this ticket?

+1 for this pinning to be resolved. This is preventing our adoption of virtual threads.

Supersedes Bug#109346, Bug#109554 and Bug#109713.

Posted by developer:
 
Added the following to the Connector/J 9.0.0 changelog: 

"Synchronized blocks in the Connector/J code were replaced with ReentrantLocks. This allows carrier threads to unmount virtual threads when they are waiting on IO operations, making Connector/J virtual-thread friendly. Thanks to Bart De Neuter for contributing to this patch. "