Apr 30, 2015 1:58:18 PM WARNING hudson.plugins.emailext.ExtendedEmailPublisher sendMail
Could not send email.
java.lang.NullPointerException
	at com.cloudbees.jenkins.plugins.AdditionalIdentityResolver.resolveCanonicalId(AdditionalIdentityResolver.java:42)
	at hudson.model.User.get(User.java:384)
	at hudson.plugins.emailext.EmailRecipientUtils.convertRecipientString(EmailRecipientUtils.java:82)
	at hudson.plugins.emailext.EmailRecipientUtils.addAddressesFromRecipientList(EmailRecipientUtils.java:166)
	at hudson.plugins.emailext.ExtendedEmailPublisher.createMail(ExtendedEmailPublisher.java:618)
	at hudson.plugins.emailext.ExtendedEmailPublisher.sendMail(ExtendedEmailPublisher.java:335)
	at hudson.plugins.emailext.ExtendedEmailPublisher._perform(ExtendedEmailPublisher.java:326)
	at hudson.plugins.emailext.ExtendedEmailPublisher.perform(ExtendedEmailPublisher.java:234)
	at hudson.tasks.BuildStepMonitor$1.perform(BuildStepMonitor.java:20)
	at hudson.model.AbstractBuild$AbstractBuildExecution.perform(AbstractBuild.java:770)
	at hudson.model.AbstractBuild$AbstractBuildExecution.performAllBuildSteps(AbstractBuild.java:734)
	at hudson.model.Build$BuildExecution.cleanUp(Build.java:192)
	at hudson.model.Run.execute(Run.java:1805)
	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
	at hudson.model.ResourceController.execute(ResourceController.java:89)
	at hudson.model.Executor.run(Executor.java:240)