12.2 - Ora-03137 [kpoal8Check-5] from SQL Plus 8.0
Hello!
I'm trying to connect into a 12.2.0.1 database (non-pdb) using SQL Plus 8.0 and I'm getting the ORA-03137 [kpoal8Check-5] error when the connection is established. At this point, I run a simple command (like rollback) and the database returns the same error, when running it for the second time the connect is lost and I get the error ORA-03138.
The database is running on a VMware with Oracle Linux 7.3 (also tested with Oracle Linux 7.1). Both SQLNET.ALLOWED_LOGON_VERSION_CLIENT and SQLNET.ALLOWED_LOGON_VERSION_SERVER are set to 8.
I'm aware that this version of SQL Plus is not supported, but it was working fine on the 12.1 release.