Unable to Connect to APEX: ORA-12537
(Doc ID 413525.1)
Last updated on AUGUST 27, 2019
Applies to:Oracle REST Data Services - Version 1.1.0 and later
Oracle Application Express (APEX) - Version 1.5 and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Database Exadata Express Cloud Service - Version N/A and later
Oracle Database Cloud Exadata Service - Version N/A and later
Information in this document applies to any platform.
APEX has been installed and configured according to the instructions in the HTML DB / Application Express installation guide, and has been configured with an HTTP Server or with Oracle REST Data Services (ORDS).
When running the URL http://servername:7777/pls/apex, a "Page cannot be displayed" error occurs.
A review of the error_log shows the following:
[Tue Jan 30 14:47:43 2007] [warn] [client xxx.xxx.xxx.xxx] mod_plsql: Long running URL [/pls/apex/apex] timed out
[Tue Jan 30 14:47:43 2007] [error] [client xxx.xxx.xxx.xxx] [ecid: <ECID>] mod_plsql: /pls/apex/apex HTTP-503 ORA-12537
[Tue Jan 30 14:50:57 2007] [warn] [client xxx.xxx.xxx.xxx] mod_plsql: Long running URL [/pls/apex/apex] timed out
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