Re: replication from 8.0 to 8.4 error

[Henrique Garcia]

Hi David,

Replication from MySQL 8.0 to 8.4 is supported, so I would not focus on Ubuntu vs. Rocky Linux.

The error:

Relay log read failure: Could not parse relay log event entry

usually points to one of the following:

- Corrupted relay log on the replica.
- Corrupted binary log on the source.
- Incorrect replication starting position.
- A specific event that the replica cannot parse.

Could you share the output of:

SHOW REPLICA STATUS\G

especially:

- Last_IO_Error
- Last_SQL_Error
- Relay_Log_File
- Relay_Log_Pos
- Source_Log_File
- Read_Source_Log_Pos

Also, was the replica initialized from a consistent backup before starting replication, or was it configured directly against the source?

Without the full SHOW REPLICA STATUS output, it is difficult to determine whether this is relay log corruption or a replication initialization issue.

Att, Henrique Garcia.