Bug #116673 gtid exists，but data and binlog lost

• Submitted: 15 Nov 3:37
• Modified: 15 Nov 19:35
• Reporter: dakun li
• Status: Can't repeat
• Category: MySQL Server: Group Replication
• Severity: S1 (Critical)
• Version: 8.0.25
• OS: Any
• Assigned to: MySQL Verification Team
• CPU Architecture: Any

[15 Nov 3:37] dakun li

Description:
 we have a Mysql slave,the version is 8.0.25,we set innodb_flush_log_at_trx_commit=2,and sync_binlog=0,one day,the slave  is poweroff ，not shutdown normal.when the mysql restart.we find the io_thread error.the slave gtid the same with master.but the data not the same,lost rows.

we doubt the gtid have write to the gtid_execute table,but the binlog and commit redo log lost.so when mysql start,mysql rollback the data.but the gtid not rollback.

please check the Is it possible？？？？？ 
thanks

How to repeat:
no，，，

[15 Nov 19:35] MySQL Verification Team

Hi,

I cannot reproduce this with modern version of MySQL. You are using version that is more than 3 years old, please consider upgrading at your earliest convenience. 

Thanks for using MySQL