Connecting to PDB fails with ORA-44787: Service cannot be switched into

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 If we try to connect PDB getting below error

SQL> alter session set container="dev2";


ERROR:

ORA-03114: not connected to ORACLE


Solution:

Check listener is working normally

Below action plan no need application bounce  

Close and reopen the PDB


SQL> alter pluggable database "dev2" close;

Pluggable database altered.


SQL> alter pluggable database "dev2" open;

Pluggable database altered.


SQL> alter session set container="dev2";

Session altered.

If “alter pluggable database "dev2" close” command taking time Please check how many users connected database

ps -ef |grep -i local=no

If more user connected open duplicate session connect sqlplus and startup force command. But startup force command is not recommended based on the scenarios we can use it. 

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