Login page error: 404 – The url /OA_HTML/AppsLogin not found

This blog speaks about the Login Page Issue on R12.1.1 instance.

Suddenly the login page was throwing an error – 404 /OA_HTML/AppsLogin was not found on the server

The access_log shows no errors. error.log from $LOG_HOME/ora/10.1.3/Apache shows

[Tue Jan 18 11:27:51 2011] [error] [client 123.238.255.152] [ecid: 1295330271:127.0.0.1:10897:0:2,0] File does not exist: /oracle/CLON/inst/apps/CLON_obaserver/portal/OA_HTML/AppsLogin
[Tue Jan 18 11:27:54 2011] [error] [client 123.238.255.152] [ecid: 1295330274:127.0.0.1:10897:0:3,0] File does not exist: /oracle/CLON/inst/apps/CLON_obaserver/portal/OA_HTML/AppsLogin
[Tue Jan 18 11:30:10 2011] [error] [client 123.238.255.152] [ecid: 1295330410:127.0.0.1:10899:0:2,0] File does not exist: /oracle/CLON/inst/apps/CLON_obaserver/portal/OA_HTML/AppsLogin

I recreated the jar files using adadmin

and compiled the jsp using

cd $FND_TOP/patch/115/bin
perl ojspCompile.pl --compile --flush -p 20 -log /tmp/ojspc_error2.log

Nothing worked out.

Fix:
This problem occurred because wsrp_service.wsdl was owned by root but the services were being started by applmgr.

Ensure that the file

$ORA_CONFIG_HOME/10.1.3/j2ee/oacore/application-deployments/oacore/html/server-wsdl/wsrp_service.wsdl

it shows it is owned by root. Somebody started the services of Apps as root user.

Changed the owner of the file to Apps Owner.

Restarted the service.

Everything works fine.