spring-projects/spring-framework — pull request #419 by mikesir87 (2013-11-25 16:28:34+00:00)
Title: Catch No RequestUpgradeStrategy exc during new DefaultHandshakeHandler()

If the exception is not caught, the app cannot be deployed into
environments that do not have a RequestUpgradeStrategy defined (for
example, Wildfly). Catching this exception allows for the other SockJS
fallbacks to be used without the use of the WebSocket.

Resolves SPR-11111

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