java.lang.RuntimeException: java.lang.NullPointerException

java.lang.NullPointerException: 	at com.opensymphony.user.User.(User.java:52)	at com.opensymphony.user.UserManager$Type$1.create(UserManager.java:47)	at com.opensymphony.user.UserManager$Type$1.create(UserManager.java:45)	at com.opensymphony.user.UserManager.buildEntity(UserManager.java:295)	at com.opensymphony.user.UserManager.getEntities(UserManager.java:248)	at com.opensymphony.user.UserManager.getUsers(UserManager.java:165)	at com.atlassian.jira.user.util.DefaultUserManager.getAllUsers(DefaultUserManager.java:68)	at sun.reflect.GeneratedMethodAccessor1432.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at com.atlassian.jira.ProxyAdapter$ProxiedComponentInvocationHandler.invoke(ProxyAdapter.java:167)	at $Proxy91.getAllUsers(Unknown Source)	at sun.reflect.GeneratedMethodAccessor1432.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at com.atlassian.plugin.osgi.hostcomponents.impl.DefaultComponentRegistrar$ContextClassLoaderSettingInvocationHandler.invoke(DefaultComponentRegistrar.java:129)	at $Proxy366.getAllUsers(Unknown Source)	at sun.reflect.GeneratedMethodAccessor1432.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at com.atlassian.plugin.osgi.bridge.external.HostComponentFactoryBean$DynamicServiceInvocationHandler.invoke(HostComponentFactoryBean.java:150)	at $Proxy366.getAllUsers(Unknown Source)	at com.atlassian.jira.user.util.UserUtilImpl.getAllUsers(UserUtilImpl.java:522)	at com.atlassian.studio.jira.license.StudioLicenseUserUtilImpl.doGetAllUsers(StudioLicenseUserUtilImpl.java:483)	at com.atlassian.studio.jira.license.StudioLicenseUserUtilImpl.access$000(StudioLicenseUserUtilImpl.java:56)	at com.atlassian.studio.jira.license.StudioLicenseUserUtilImpl$1.get(StudioLicenseUserUtilImpl.java:493)	at com.atlassian.studio.jira.license.StudioLicenseUserUtilImpl$1.get(StudioLicenseUserUtilImpl.java:490)	at com.atlassian.studio.common.util.Functions.attempt(Functions.java:39)	at com.atlassian.studio.jira.license.StudioLicenseUserUtilImpl.getAllUsers(StudioLicenseUserUtilImpl.java:489)	at sun.reflect.GeneratedMethodAccessor1914.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at org.springframework.aop.support.AopUtils.invokeJoinpointUsingReflection(AopUtils.java:307)	at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.doInvoke(ServiceInvoker.java:58)	at org.springframework.osgi.service.importer.support.internal.aop.ServiceInvoker.invoke(ServiceInvoker.java:62)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)	at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invokeUnprivileged(ServiceTCCLInterceptor.java:56)	at org.springframework.osgi.service.util.internal.aop.ServiceTCCLInterceptor.invoke(ServiceTCCLInterceptor.java:39)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at org.springframework.osgi.service.importer.support.LocalBundleContextAdvice.invoke(LocalBundleContextAdvice.java:59)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at org.springframework.aop.support.DelegatingIntroductionInterceptor.doProceed(DelegatingIntroductionInterceptor.java:131)	at org.springframework.aop.support.DelegatingIntroductionInterceptor.invoke(DelegatingIntroductionInterceptor.java:119)	at org.springframework.aop.framework.ReflectiveMethodInvocation.proceed(ReflectiveMethodInvocation.java:171)	at org.springframework.aop.framework.JdkDynamicAopProxy.invoke(JdkDynamicAopProxy.java:204)	at $Proxy705.getAllUsers(Unknown Source)	at com.atlassian.agmp.openid.users.mgmt.jira.UserServiceImpl.getAllUsernames(UserServiceImpl.java:106)	at com.atlassian.agmp.integration.jira.poller.impl.UserSynchronizerImpl.process(UserSynchronizerImpl.java:57)	at com.atlassian.agmp.integration.jira.poller.impl.UserSynchronizerImpl.process(UserSynchronizerImpl.java:47)	at com.atlassian.agmp.integration.jira.poller.impl.SyncJobImpl.process(SyncJobImpl.java:177)	at com.atlassian.agmp.integration.jira.poller.impl.SyncJobImpl.run(SyncJobImpl.java:117)	at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)	at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)	at java.util.concurrent.FutureTask.run(FutureTask.java:138)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.access$301(ScheduledThreadPoolExecutor.java:98)	at java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:207)	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)	at java.lang.Thread.run(Thread.java:619)