，alert log里面有大量的这个错误是什么原因？怎么排查？
Fatal NI connect error 12537, connecting to:
(LOCAL=NO)

VERSION INFORMATION:
TNS for Linux: Version 11.2.0.1.0 - Production
Oracle Bequeath NT Protocol Adapter for Linux: Version 11.2.0.1.0 - Production
TCP/IP NT Protocol Adapter for Linux: Version 11.2.0.1.0 - Production
Time: 29-AUG-2024 23:08:42
Tracing not turned on.
Tns error struct:
ns main err code: 12537

TNS-12537: TNS:connection closed
ns secondary err code: 12560
nt main err code: 0
nt secondary err code: 0
nt OS err code: 0
opiodr aborting process unknown ospid (58560) as a result of ORA-609
Thu Aug 29 23:09:02 2024