From: <webtier_at_javadesktop.org>
Date: Sun, 19 Jul 2009 17:35:27 PDT

From the bug that you referenced, it mentions:

com.sun.faces.enableMultiThreadedStartup which defaults to true. This
   option must be set to false when deploying to GAE.

This setting is also documented here:
https://javaserverfaces.dev.java.net/nonav/rlnotes/1.2_13/changelog.html


Because GAE doesn't like spawning threads.
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