Windows: Listener on Windows OS can Hang or Become Slow to Respond if "FireEye" Security Service is Running (Doc ID 2612592.1)

Last updated on APRIL 17, 2023

Applies to:

Symptoms

Remote client connections hang or are extremely slow to become established to the database.
The alert reveal a lot of these error messages that correspond to the connection failures.

Fatal NI connect error 12537, connecting to:
 (LOCAL=NO)

  VERSION INFORMATION:
TNS for 64-bit Windows: Version 11.2.0.4.0 - Production
Oracle Bequeath NT Protocol Adapter for 64-bit Windows: Version 11.2.0.4.0 - Production
Windows NT TCP/IP NT Protocol Adapter for 64-bit Windows: Version 11.2.0.4.0 - Production
  Time: 14-NOV-2019 22:04:55
  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 (41920) as a result of ORA-609
Thu Nov 14 22:05:25 2019

Also, the listener process is slow to respond when issuing any commands, such as LSNRCTL status or services.

There are no errors in the listener log that correspond to this problem.

Cause

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