RE: Server downtime during hot redeploy of WAR

Hi Dave,

I have encountered this problem in many web servers and have not found
support for a 0 downtime new product release or product update.

There is a solution to this and we have developed it here at Wrapped
Apps Corporation. Basically we have developed a product called the
AppsOnDemand Server and it is a web application deployed in resin. The
AppsOnDemand Server maintains an application library of applications and
multiple versions and manages the deployment, version control and
facilitates the ability to release new versions with 0 down time and no
client interruption.

Check us out at www.wrappedapps.com our product documentation has not
been posted on the web but I would be happy to provide you any
information you might need. We are also looking for some beta clients,
would you be interested?

Kind Regards,

Greg Hess
Software Engineer
Wrapped Apps Corporation
275 Michael Cowpland Dr.
Suite 201
Ottawa, Ontario
K2M 2G2
Tel: (613) 591 -7552
Fax: (613) 591-0523
1 (877) 388-6742

 




> -----Original Message-----
> From: owner-resin-interest@xxxxxxxxxx [mailto:owner-resin-
> interest@xxxxxxxxxx] On Behalf Of David Jones
> Sent: Thursday, March 11, 2004 6:17 AM
> To: Resin Interest (E-mail)
> Subject: Server downtime during hot redeploy of WAR
> 
> Hi, I have a setup with Apache and Resin 2.1.12 with a backup jvm and
> persistent sessions using file-store.  I've run this setup on both Sun
> unix and Win XP, with and without Apache and I have encountered the
same
> problem during hot redeployments of WAR files:
> 
> It seems that when the new WAR file is unpacked, resin still tries to
> service requests and the result is that the user gets a "404 Not
Found"
> error if they attempt to access a page at the 'wrong' moment  (I
assume
> because resin has deleted the original webapp to make way for the
newly
> redeployed version).
> 
> Is there a way around this so that I can hot-redeploy without any
> downtime?
> 
> Thanks
> 
> Dave