java.lang.NullPointerException: This exception has no message.

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java.lang.NullPointerException:
at com.springsource.kernel.config.internal.ConfigurationAdminExporter.unexportConfiguration(ConfigurationAdminExporter.java:104)
at com.springsource.kernel.config.internal.ConfigurationAdminExporter.configurationEvent(ConfigurationAdminExporter.java:79)
at org.apache.felix.cm.impl.ConfigurationManager$FireConfigurationEvent.run(ConfigurationManager.java:1693)

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