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Hot vs Cold Deployment in JBoss

24 September, 2020

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Hot vs Cold Deployment 

Hot deployment is cool, but there is a risk of:

  1. Class-Loader exceptions (more on this later)
  2. Unrecognized configuration settings
  3. Lost session/application scoped data
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Cold deployment is slow but stable

  1. Stop JBoss AS
  2. Optionally delete data/, log/, tmp/, work/
  3. Redeploy your application(s)
  4. Start JBoss AS

Hot deployment is generally considered safe for:

  1. Java Server Pages (.jsp) files. They get recompiled automatically by the servlet engine following a change.
  2. Class files that do not change their public interfaces, especially when there is no RMI involved. This requires full redeployment, so it is still somewhat risky.

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