From: <glassfish_at_javadesktop.org>
Date: Thu, 17 Jan 2008 22:51:33 PST

This error can come if somehow the property

  javax.net.ssl.keyStore property was set (which is why the code could locate the keystore)
  BUT
  the property : javax.net.ssl.keyStorePassword seems not set and so the JavaKeyStore class complains Password must not be null.
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