HTTP Status 500 - 

type Exception report

message

description The server encountered an internal error () that prevented it from fulfilling this request.

exception

org.jboss.resteasy.spi.UnhandledException: java.lang.NullPointerException
	org.jboss.resteasy.core.SynchronousDispatcher.handleApplicationException(SynchronousDispatcher.java:340)
	org.jboss.resteasy.core.SynchronousDispatcher.handleException(SynchronousDispatcher.java:214)
	org.jboss.resteasy.core.SynchronousDispatcher.handleInvokerException(SynchronousDispatcher.java:190)
	org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:540)
	org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:502)
	org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:119)
	org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
	org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
	org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
	org.ovirt.engine.core.aaa.filters.RestApiSessionMgmtFilter.doFilter(RestApiSessionMgmtFilter.java:69)
	org.ovirt.engine.core.aaa.filters.EnforceAuthFilter.doFilter(EnforceAuthFilter.java:39)
	org.ovirt.engine.core.aaa.filters.LoginFilter.doFilter(LoginFilter.java:74)
	org.ovirt.engine.core.aaa.filters.NegotiationFilter.doFilter(NegotiationFilter.java:113)
	org.ovirt.engine.core.aaa.filters.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:90)
	org.ovirt.engine.core.aaa.filters.SessionValidationFilter.doFilter(SessionValidationFilter.java:73)
	org.ovirt.engine.core.aaa.filters.EngineSessionTokenAuthenticationFilter.doFilter(EngineSessionTokenAuthenticationFilter.java:31)
	org.ovirt.engine.core.aaa.filters.RestApiSessionValidationFilter.doFilter(RestApiSessionValidationFilter.java:32)
	org.ovirt.engine.api.common.security.CSRFProtectionFilter.doFilter(CSRFProtectionFilter.java:110)
	org.ovirt.engine.api.common.security.CSRFProtectionFilter.doFilter(CSRFProtectionFilter.java:101)

root cause

java.lang.NullPointerException
	org.ovirt.engine.api.common.util.EnumValidator.validateEnum(EnumValidator.java:86)
	org.ovirt.engine.api.common.util.EnumValidator.validateEnum(EnumValidator.java:66)
	org.ovirt.engine.api.restapi.resource.validation.CloudInitValidator.validateEnums(CloudInitValidator.java:21)
	org.ovirt.engine.api.restapi.resource.validation.VmValidator.validateEnums(VmValidator.java:54)
	org.ovirt.engine.api.restapi.resource.validation.VmValidator.validateEnums(VmValidator.java:10)
	org.ovirt.engine.api.restapi.resource.BackendResource.validateEnums(BackendResource.java:348)
	org.ovirt.engine.api.restapi.resource.BackendVmResource.start(BackendVmResource.java:342)
	sun.reflect.GeneratedMethodAccessor1093.invoke(Unknown Source)
	sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	java.lang.reflect.Method.invoke(Method.java:606)
	org.jboss.resteasy.core.MethodInjectorImpl.invoke(MethodInjectorImpl.java:155)
	org.jboss.resteasy.core.ResourceMethod.invokeOnTarget(ResourceMethod.java:257)
	org.jboss.resteasy.core.ResourceMethod.invoke(ResourceMethod.java:222)
	org.jboss.resteasy.core.ResourceLocator.invokeOnTargetObject(ResourceLocator.java:152)
	org.jboss.resteasy.core.ResourceLocator.invoke(ResourceLocator.java:91)
	org.jboss.resteasy.core.SynchronousDispatcher.getResponse(SynchronousDispatcher.java:525)
	org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:502)
	org.jboss.resteasy.core.SynchronousDispatcher.invoke(SynchronousDispatcher.java:119)
	org.jboss.resteasy.plugins.server.servlet.ServletContainerDispatcher.service(ServletContainerDispatcher.java:208)
	org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:55)
	org.jboss.resteasy.plugins.server.servlet.HttpServletDispatcher.service(HttpServletDispatcher.java:50)
	javax.servlet.http.HttpServlet.service(HttpServlet.java:847)
	org.ovirt.engine.core.aaa.filters.RestApiSessionMgmtFilter.doFilter(RestApiSessionMgmtFilter.java:69)
	org.ovirt.engine.core.aaa.filters.EnforceAuthFilter.doFilter(EnforceAuthFilter.java:39)
	org.ovirt.engine.core.aaa.filters.LoginFilter.doFilter(LoginFilter.java:74)
	org.ovirt.engine.core.aaa.filters.NegotiationFilter.doFilter(NegotiationFilter.java:113)
	org.ovirt.engine.core.aaa.filters.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:90)
	org.ovirt.engine.core.aaa.filters.SessionValidationFilter.doFilter(SessionValidationFilter.java:73)
	org.ovirt.engine.core.aaa.filters.EngineSessionTokenAuthenticationFilter.doFilter(EngineSessionTokenAuthenticationFilter.java:31)
	org.ovirt.engine.core.aaa.filters.RestApiSessionValidationFilter.doFilter(RestApiSessionValidationFilter.java:32)
	org.ovirt.engine.api.common.security.CSRFProtectionFilter.doFilter(CSRFProtectionFilter.java:110)
	org.ovirt.engine.api.common.security.CSRFProtectionFilter.doFilter(CSRFProtectionFilter.java:101)