ORA-12537: TNS:connection closed

restarted listener, looks fine and user can connect.

but after a while, told me happened again.

funny and google internet, follow below article.

http://www.dba-oracle.com/t_ora_12537_tns_error.htm


nothing matches me.

No choice, try my luck to restart database. while shutdown it , hanging with dispatcher d000.


shutdown abort
startup

looks working more than 2 hours now.

to keep it monitor further.