We have changes IP address of our machine where Oracle 9iAS version 1 is installed with Apache Webserver. After the change, the AS has stopped connecting to the database. Can we do something without reinstalling the AS.

You need to look at your connection strings. They are probably specifying an IP instead of a servert name.

We have changes IP address of our machine where Oracle 9iAS version 1 is installed with Apache Webserver. After the change, the AS has stopped connecting to the database. Can we do something without reinstalling the AS.


Try:
$ORACLE_HOME/dcm/bin/dcmctl resetHostInformation -v -d
Then check the file $ORACLE_HOME/opmn/conf/ons.conf
Where you should see the new IP number instead of the old one.


Hth