Hi, I have a portal which is visited very frequently. Lets say every second a user is visiting a page on this server.
I have to update this web application often.
I´m updating this by simply replacing the ear file in the deploy dir on the server. So the application is undeployed and redeployed. while the ear file is redeployed i sometimes get error messsages. I think it´s because some parts of the application are already deployed while others are still missing.
What is the right procedure to update such an application? How can i add an "currently under maintainance" page if somebody connects while i´m updating?