It was hard to find out the reason as it was not happening every time.
However, due to the effort of all teammates and we finally made it.
We found that the oracle databse server listener will be closed whenever reboot. So we have to manual bring up the database listener everytime it reboot in order to make database workable.
It was hard to find out the reason as it was not happening every time. However, due to the effort of all teammates and we finally made it. We found that the oracle databse server listener will be closed whenever reboot. So we have to manual bring up the database listener everytime it reboot in order to make database workable.