RDS MySQL Aurora DB Upgrade failed. Error logs contains weird errors.

Hello there,

We tried to upgrade MySQL DB from 5.7.12(aurora 2.11.5) to 8.0.32(aurora 3.05.2).

"serverAddress": "/tmp%2Fmysql.sock",
"serverVersion": "5.7.12-log - MySQL Community Server (GPL)",
"targetVersion": "8.0.32",
"auroraServerVersion": "2.11.5",
"auroraTargetVersion": "3.05.2",
"outfilePath": "/rdsdbdata/tmp/PreChecker.log",

We received total of 37 errors. First error is:

{
    "id": "partitionedTablesInSharedTablespaceCheck",
    "title": "Usage of partitioned tables in shared tablespaces",
    "status": "ERROR",
    "description": "Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111)",
    "documentationLink": "https://dev.mysql.com/doc/refman/8.0/en/mysql-nutshell.html#mysql-nutshell-removals"
}

And subsequent checks have failed and none of them are passed. One of the error is:

{
    "id": "circularDirectoryCheck",
    "title": "Circular directory references in tablespace data file paths",
    "status": "ERROR",
    "description": "Not connected",
    "documentationLink": "https://dev.mysql.com/doc/refman/8.0/en/upgrading-from-previous-series.html#upgrade-innodb-changes"
}

As you can see, very first error description is Can't connect to local MySQL server through socket '/tmp/mysql.sock' (111) And then subsequent precheck error description is Not connected. Is it really a precheck error or connection error?

Thanks!