12c EM Express Can't Access in Browser Times Out With "unable To Connect" Error Message. (Doc ID 1668859.1)

Last updated on JANUARY 30, 2022

Applies to:

Oracle Database - Enterprise Edition - Version 12.1.0.1 to 12.1.0.1 [Release 12.1]
Oracle Database Cloud Schema Service - Version N/A and later
Oracle Database Exadata Cloud Machine - Version N/A and later
Oracle Cloud Infrastructure - Database Service - Version N/A and later
Oracle Database Backup Service - Version N/A and later
Information in this document applies to any platform.

Symptoms

1. Can't access DB Express - browser times out with "unable to connect" error message.

2. Listener is running, but doesn't reference XMLDB:

>lsnrctl status
[....]

Listening Endpoints Summary...
(DESCRIPTION=(ADDRESS=(PROTOCOL=tcp)(HOST=xxx.xxx.xx.xxx)(PORT=xxxx)))
(DESCRIPTION=(ADDRESS=(PROTOCOL=ipc)(PIPENAME=xxxEXTPROC1521ipc)))
Services Summary...
Service "XXXExtProc" has 1 instance(s).
Instance "XXXExtProc", status UNKNOWN, has 1 handler(s) for this service...

3. Ports configured correctly according to dbms_xdb_config, but not in listener.ora:

SQL> select dbms_xdb_config.gethttpport() from dual;

DBMS_XDB_CONFIG.GETHTTPPORT()
-----------------------------
0

SQL> select dbms_xdb_config.gethttpSport() from dual;

DBMS_XDB_CONFIG.GETHTTPSPORT()
------------------------------
5500

4. Netstat indicates nothing running on 5500.

>netstat -an | findstr 5500
[nothing returned]