MySQL Bugs: #102521: semi plugin is not support Multi-Source Replication?

Bug #102521	semi plugin is not support Multi-Source Replication?
Submitted:	8 Feb 2021 8:22	Modified:	9 Feb 2021 10:37
Reporter:	peng gao	Email Updates:
Status:	Unsupported	Impact on me:	None
Category:	MySQL Server: Replication	Severity:	S3 (Non-critical)
Version:	8.0.21	OS:	Any
Assigned to:	MySQL Verification Team	CPU Architecture:	Any

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Description:
Hi all:
  when Multi-Source Replication used,slave have more than one IO threads.But semi plugin use global variable 

/*
  indicate whether or not the slave should send a reply to the master.

  This is set to true in repl_semi_slave_read_event if the current
  event read is the last event of a transaction. And the value is
  checked in repl_semi_slave_queue_event.
*/
bool semi_sync_need_reply= false;

to find which event need to ack after write to relay log.
Multi-Source have more than one io thread. 
is semi plugin is not support Multi-Source Replication?

thanks!!

How to repeat:
no repeat!

Hi,

Yes, it is unsupported.