Loop back adapter host file configuration issue?

Question

i did not exactly follow the following instructions :
Add a line to the C:\winnt\system32\drivers\etc\hosts file with the following format, right after the localhost line:
IP_address hostname.domainname hostname
instead I have the following in my host file
IP_address hostname
that should be fine too right?

Answer 1

i have actually reintalled oracle infra and then mid tier and it installed fine this time... I was able to log in to the portal at first with the the url
http://localhost:7778/pls/portal
but then I changed the portal database password with the command since I could not log into it
alter user portal account unlock;
alter user portal identified by password
and I am getting the following error in the web page:
Servlet Error
An unexpected servlet error was encountered.
Please check the log file for more details.
where are the log files I looked in the server.log at C:\OraHome_midtier\j2ee\OC4J_Portal\log\OC4J_Portal_default_island_1 one of them and they say:
java.lang.NullPointerException
     at com.evermind.server.rmi.RMIServer.run(RMIServer.java:464)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186)
     at java.lang.Thread.run(Thread.java:534)
06/04/09 15:11:15 Internal server error
java.lang.NullPointerException
     at com.evermind.server.rmi.RMIServer.run(RMIServer.java:464)
     at com.evermind.util.ReleasableResourcePooledExecutor$MyWorker.run(ReleasableResourcePooledExecutor.java:186)
     at java.lang.Thread.run(Thread.java:534)
what does this is going wrong