Bug #74693 is this a code defect in calculate pending jobs size?

• Submitted: 5 Nov 2014 3:07
• Modified: 14 Oct 2020 13:15
• Reporter: yx jiang
• Status: No Feedback
• Category: MySQL Server: Replication
• Severity: S3 (Non-critical)
• Version: 5.6.12
• OS: Any
• Assigned to: MySQL Verification Team
• CPU Architecture: Any

[5 Nov 2014 3:07] yx jiang

Description:
variable:mts_pending_jobs_size of class Relay_log_info 

in parallel mode, this variable is added/reduced in different thread 

in coordinator thread:rli->mts_pending_jobs_size= new_pend_size; 
in worker thread:rli->mts_pending_jobs_size -= ev->data_written; 
finally when stop slave, asserting that "DBUG_ASSERT(rli->mts_pending_jobs_size == 0);" 

In my opinion, this is a defact but will not lead to fatal error.

How to repeat:
when research in code

Suggested fix:
use mutex protection

[14 Sep 2020 13:15] MySQL Verification Team

Hi,

checking 8.0.21 source and I see this is working differently. Are you able to reproduce this race condition with 8.0.21?

[15 Oct 2020 1:00] Bugs System

No feedback was provided for this bug for over a month, so it is
being suspended automatically. If you are able to provide the
information that was originally requested, please do so and change
the status of the bug back to "Open".