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Article:
  Bean-Managed Transaction Suspension in J2EE
Subject:   Use case
Date:   2005-07-29 07:32:01
From:   maximdim
Response to: Reason.

Well, pretty much the same use cases that will mandate using RequiresNew in CMT - say your code need to update something in DB and notify other application at the same time and notification should succeed even if DB operation fail (needs to be executed in separate Tx).