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host parameter is null
java.lang.IllegalArgumentException: host parameter is null	at org.apache.commons.httpclient.HttpConnection.(HttpConnection.java:205)	at org.apache.commons.httpclient.HttpConnection.(HttpConnection.java:154)	at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionWithReference.(MultiThreadedHttpConnectionManager.java:1105)	at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$ConnectionPool.createConnection(MultiThreadedHttpConnectionManager.java:741)	at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.doGetConnection(MultiThreadedHttpConnectionManager.java:469)	at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager.getConnectionWithTimeout(MultiThreadedHttpConnectionManager.java:394)	at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:152)	at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:396)	at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:324)	at com.atlassian.crowd.integration.rest.service.RestExecutor$MethodExecutor.executeCrowdServiceMethod(RestExecutor.java:415)	at com.atlassian.crowd.integration.rest.service.RestExecutor$MethodExecutor.andReceive(RestExecutor.java:304)	at com.atlassian.crowd.integration.rest.service.RestCrowdClient.searchGroupNames(RestCrowdClient.java:545)	at com.atlassian.crowd.integration.atlassianuser.UserGroupFetcher.fetch(UserGroupFetcher.java:38)	at com.atlassian.crowd.integration.atlassianuser.UserGroupCache.fetchAndSetSnapshot(UserGroupCache.java:85)	at com.atlassian.crowd.integration.atlassianuser.UserGroupCache.get(UserGroupCache.java:131)	at com.atlassian.crowd.integration.atlassianuser.CrowdUserManager.getUser(CrowdUserManager.java:26)	at com.atlassian.user.impl.delegation.DelegatingListUserManager.getUser(DelegatingListUserManager.java:71)	at com.atlassian.crowd.integration.atlassianuser.AbstractDynamicUserConfiguration.loadConfiguration(AbstractDynamicUserConfiguration.java:62)	at com.atlassian.crowd.integration.atlassianuser.AbstractDynamicUserConfiguration.updateConfiguration(AbstractDynamicUserConfiguration.java:44)	at com.atlassian.crowd.integration.atlassianuser.UserConfigurationServiceImpl.changeUserConfigurationType(UserConfigurationServiceImpl.java:36)	at com.atlassian.bamboo.configuration.UserManagement.execute(UserManagement.java:86)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)	at java.lang.reflect.Method.invoke(Method.java:597)	at com.opensymphony.xwork.DefaultActionInvocation.invokeAction(DefaultActionInvocation.java:358)	at com.opensymphony.xwork.DefaultActionInvocation.invokeActionOnly(DefaultActionInvocation.java:218)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:192)	at com.opensymphony.xwork.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:175)	at com.atlassian.bamboo.ww2.interceptors.BambooWorkflowInterceptor.doIntercept(BambooWorkflowInterceptor.java:37)	at com.opensymphony.xwork.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.validator.ValidationInterceptor.doIntercept(ValidationInterceptor.java:116)	at com.atlassian.bamboo.ww2.interceptors.BambooValidationInterceptor.doIntercept(BambooValidationInterceptor.java:33)	at com.opensymphony.xwork.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:86)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.atlassian.bamboo.ww2.interceptors.JSONValidationInterceptor.intercept(JSONValidationInterceptor.java:78)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.webwork.interceptor.FileUploadInterceptor.intercept(FileUploadInterceptor.java:174)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.interceptor.I18nInterceptor.intercept(I18nInterceptor.java:151)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.atlassian.bamboo.security.acegi.intercept.web.WebworkSecurityInterceptor.intercept(WebworkSecurityInterceptor.java:54)	at com.atlassian.bamboo.security.acegi.intercept.web.WebworkSecurityInterceptorProxy.intercept(WebworkSecurityInterceptorProxy.java:30)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.atlassian.bamboo.ww2.interceptors.PaginationAwareInterceptor.intercept(PaginationAwareInterceptor.java:81)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.atlassian.bamboo.ww2.interceptors.StatisticsAwareInterceptor.intercept(StatisticsAwareInterceptor.java:42)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.atlassian.bamboo.ww2.interceptors.ResultsListAwareInterceptor.intercept(ResultsListAwareInterceptor.java:45)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.atlassian.bamboo.ww2.interceptors.NavigationAwareInterceptor.intercept(NavigationAwareInterceptor.java:69)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.atlassian.bamboo.ww2.interceptors.BuildResultsSummaryAwareInteceptor.intercept(BuildResultsSummaryAwareInteceptor.java:66)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.atlassian.bamboo.ww2.interceptors.ResultsSummaryAwareInteceptor.intercept(ResultsSummaryAwareInteceptor.java:74)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.atlassian.bamboo.ww2.interceptors.ChainAwareInterceptor.intercept(ChainAwareInterceptor.java:112)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.interceptor.AroundInterceptor.intercept(AroundInterceptor.java:31)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.interceptor.ExceptionMappingInterceptor.intercept(ExceptionMappingInterceptor.java:186)	at com.opensymphony.xwork.DefaultActionInvocation.invoke(DefaultActionInvocation.java:190)	at com.opensymphony.xwork.DefaultActionProxy.execute(DefaultActionProxy.java:116)	at com.opensymphony.webwork.dispatcher.DispatcherUtils.serviceAction(DispatcherUtils.java:274)	at com.opensymphony.webwork.dispatcher.FilterDispatcher.doFilter(FilterDispatcher.java:202)	at com.atlassian.bamboo.ww2.BambooFilterDispatcher.doFilter(BambooFilterDispatcher.java:30)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:66)	at com.atlassian.applinks.core.rest.context.ContextFilter.doFilter(ContextFilter.java:25)	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:74)	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:66)	at com.atlassian.labs.httpservice.resource.ResourceFilter.doFilter(ResourceFilter.java:59)	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:74)	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:77)	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:63)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.opensymphony.module.sitemesh.filter.PageFilter.parsePage(PageFilter.java:118)	at com.opensymphony.module.sitemesh.filter.PageFilter.doFilter(PageFilter.java:52)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.opensymphony.webwork.dispatcher.ActionContextCleanUp.doFilter(ActionContextCleanUp.java:88)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:77)	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:63)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.atlassian.bamboo.filter.AccessLogFilter.doFilter(AccessLogFilter.java:66)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:265)	at org.acegisecurity.providers.anonymous.AnonymousProcessingFilter.doFilter(AnonymousProcessingFilter.java:125)	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)	at com.atlassian.bamboo.filter.SeraphLoginFilter.doFilter(SeraphLoginFilter.java:74)	at org.acegisecurity.util.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:275)	at org.acegisecurity.util.FilterChainProxy.doFilter(FilterChainProxy.java:149)	at org.acegisecurity.util.FilterToBeanProxy.doFilter(FilterToBeanProxy.java:98)	at com.atlassian.bamboo.filter.BambooAcegiProxyFilter.doFilter(BambooAcegiProxyFilter.java:25)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.atlassian.bamboo.filter.LicenseFilter.doFilter(LicenseFilter.java:73)	at com.atlassian.core.filters.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:31)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.atlassian.johnson.filters.AbstractJohnsonFilter.doFilter(AbstractJohnsonFilter.java:71)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.atlassian.seraph.filter.SecurityFilter.doFilter(SecurityFilter.java:211)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.atlassian.seraph.filter.BaseLoginFilter.doFilter(BaseLoginFilter.java:150)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:66)	at com.atlassian.oauth.serviceprovider.internal.servlet.OAuthFilter.doFilter(OAuthFilter.java:71)	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:74)	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter$1.doFilter(DelegatingPluginFilter.java:66)	at com.atlassian.security.auth.trustedapps.filter.TrustedApplicationsFilter.doFilter(TrustedApplicationsFilter.java:98)	at com.atlassian.plugin.servlet.filter.DelegatingPluginFilter.doFilter(DelegatingPluginFilter.java:74)	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:42)	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:77)	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:63)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.springframework.orm.hibernate.support.OpenSessionInViewFilter.doFilterInternal(OpenSessionInViewFilter.java:170)	at com.atlassian.bamboo.persistence.BambooSessionInViewFilter.doFilterInternal(BambooSessionInViewFilter.java:31)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.planetj.servlet.filter.compression.CompressingFilter.handleDoFilter(CompressingFilter.java:203)	at com.planetj.servlet.filter.compression.CompressingFilter.doFilter(CompressingFilter.java:193)	at com.atlassian.bamboo.filter.CompressingFilter.doFilter(CompressingFilter.java:71)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.atlassian.bamboo.filter.RequestCacheThreadLocalFilter.doFilter(RequestCacheThreadLocalFilter.java:31)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at com.atlassian.plugin.servlet.filter.IteratingFilterChain.doFilter(IteratingFilterChain.java:46)	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:77)	at com.atlassian.plugin.servlet.filter.ServletFilterModuleContainerFilter.doFilter(ServletFilterModuleContainerFilter.java:63)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:96)	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:75)	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:128)	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)	at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:567)	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:293)	at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:849)	at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:583)	at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:454)	at java.lang.Thread.run(Thread.java:662)