BulkDelete causes many NPE errors in log files

2013-10-29 19:55:39,303 ajp-bio-8012-exec-6020 ERROR mhankus 1194x272709x1 qxwaww 192.168.10.6 /secure/views/bulkedit/BulkDeletePerform.jspa [greenhopper.customfield.rank.RankIssueEventListener]
java.lang.NullPointerException
        at com.atlassian.greenhopper.service.rank.RankIndexServiceImpl.removeIssue(RankIndexServiceImpl.java:153)
        at com.atlassian.greenhopper.service.rank.RankIndexServiceImpl.removeIssueForAllFields(RankIndexServiceImpl.java:179)
        at com.atlassian.greenhopper.customfield.rank.RankIssueEventListener.doOnIssueEvent(RankIssueEventListener.java:35)
        at com.atlassian.greenhopper.service.issue.AbstractIssueEventListener.onIssueEvent(AbstractIssueEventListener.java:38)
        at sun.reflect.GeneratedMethodAccessor4018.invoke(Unknown Source)  <+1>
        at java.lang.reflect.Method.invoke(Unknown Source)
        at com.atlassian.event.internal.SingleParameterMethodListenerInvoker.invoke(SingleParameterMethodListenerInvoker.java:36)
        at com.atlassian.event.internal.AsynchronousAbleEventDispatcher$2.run(AsynchronousAbleEventDispatcher.java:66)
        at com.atlassian.event.internal.AsynchronousAbleEventDispatcher$1.execute(AsynchronousAbleEventDispatcher.java:32)
        at com.atlassian.event.internal.AsynchronousAbleEventDispatcher.dispatch(AsynchronousAbleEventDispatcher.java:60)
        at com.atlassian.event.internal.EventPublisherImpl.invokeListeners(EventPublisherImpl.java:160)
        at com.atlassian.event.internal.EventPublisherImpl.publish(EventPublisherImpl.java:79)
        at com.atlassian.jira.event.issue.DefaultIssueEventManager.publishEvent(DefaultIssueEventManager.java:124)
        at com.atlassian.jira.event.issue.DefaultIssueEventManager.dispatchEvent(DefaultIssueEventManager.java:48)
        at com.atlassian.jira.issue.managers.DefaultIssueDeleteHelper.dispatchDeleteEvent(DefaultIssueDeleteHelper.java:239)
        at com.atlassian.jira.issue.managers.DefaultIssueDeleteHelper.deleteIssue(DefaultIssueDeleteHelper.java:135)
        at com.atlassian.jira.issue.managers.DefaultIssueManager.deleteIssue(DefaultIssueManager.java:808)
        at com.atlassian.jira.bulkedit.operation.BulkDeleteOperation.perform(BulkDeleteOperation.java:73)
        at com.atlassian.jira.bulkedit.operation.BulkDeleteOperation.perform(BulkDeleteOperation.java:57)
        at com.atlassian.jira.web.action.issue.bulkedit.BulkDelete.doPerform(BulkDelete.java:137)  <+3>
        at java.lang.reflect.Method.invoke(Unknown Source)
        at webwork.util.InjectionUtils$DefaultInjectionImpl.invoke(InjectionUtils.java:70)
        at webwork.util.InjectionUtils.invoke(InjectionUtils.java:56)  <+2> (ActionSupport.java:438) (ActionSupport.java:157)
        at com.atlassian.jira.action.JiraActionSupport.execute(JiraActionSupport.java:87)  <+7> (DefaultInterceptorChain.java:39) (NestedInterceptorChain.java:31) (ChainedInterceptor.java:16) (DefaultInterceptorChain.java:35) (GenericDispatcher.java:225) (GenericDispatcher.java:154) (JiraWebworkActionDispatcher.java:152)
        at javax.servlet.http.HttpServlet.service(HttpServlet.java:722)  <+14> (ApplicationFilterChain.java:305) (ApplicationFilterChain.java:210) (ChainedFilterStepRunner.java:87) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (XContentTypeOptionsNoSniffFilter.java:22) (AbstractHttpFilter.java:31) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (HeaderSanitisingFilter.java:44) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (IteratingFilterChain.java:46) (DelegatingPluginFilter.java:66)
        at com.atlassian.jira.tzdetect.IncludeResourcesFilter.doFilter(IncludeResourcesFilter.java:39)  <+3> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
        at com.atlassian.jira.baseurl.IncludeResourcesFilter.doFilter(IncludeResourcesFilter.java:38)  <+8> (AbstractHttpFilter.java:31) (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66) (ContextFilter.java:25) (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
        at com.atlassian.mywork.client.filter.ServingRequestsFilter.doFilter(ServingRequestsFilter.java:37)  <+3> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
        at com.atlassian.prettyurls.filter.PrettyUrlsDispatcherFilter.doFilter(PrettyUrlsDispatcherFilter.java:60)  <+3> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
        at com.atlassian.prettyurls.filter.PrettyUrlsSiteMeshFilter.doFilter(PrettyUrlsSiteMeshFilter.java:92)  <+3> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
        at com.atlassian.prettyurls.filter.PrettyUrlsMatcherFilter.doFilter(PrettyUrlsMatcherFilter.java:56)  <+3> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
        at com.atlassian.labs.botkiller.BotKillerFilter.doFilter(BotKillerFilter.java:36)  <+23> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (AccessLogFilter.java:103) (AccessLogFilter.java:87) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (XsrfTokenAdditionRequestFilter.java:54) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (SiteMeshFilter.java:181) (SiteMeshFilter.java:85) (SitemeshPageFilter.java:123) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (ChainedFilterStepRunner.java:87) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (IteratingFilterChain.java:46) (DelegatingPluginFilter.java:66)
        at com.atlassian.prettyurls.filter.PrettyUrlsCombinedMatchDispatcherFilter.doFilter(PrettyUrlsCombinedMatchDispatcherFilter.java:61)  <+22> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (SecurityFilter.java:234) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (TrustedApplicationsFilter.java:98) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (BaseLoginFilter.java:169) (JiraLoginFilter.java:70) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (IteratingFilterChain.java:46) (DelegatingPluginFilter.java:66) (OAuthFilter.java:55) (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66)
        at com.atlassian.prettyurls.filter.PrettyUrlsCombinedMatchDispatcherFilter.doFilter(PrettyUrlsCombinedMatchDispatcherFilter.java:61)  <+13> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (ProfilingFilter.java:99) (JIRAProfilingFilter.java:19) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (AbstractJohnsonFilter.java:71) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210)
        at org.tuckey.web.filters.urlrewrite.RuleChain.handleRewrite(RuleChain.java:176)
        at org.tuckey.web.filters.urlrewrite.RuleChain.doRules(RuleChain.java:145)
        at org.tuckey.web.filters.urlrewrite.UrlRewriter.processRequest(UrlRewriter.java:92)  <+10> (UrlRewriteFilter.java:394) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (GzipFilter.java:74) (GzipFilter.java:51) (JiraGzipFilter.java:55) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (IteratingFilterChain.java:46) (DelegatingPluginFilter.java:66)
        at com.atlassian.prettyurls.filter.PrettyUrlsCombinedMatchDispatcherFilter.doFilter(PrettyUrlsCombinedMatchDispatcherFilter.java:61)  <+41> (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:66) (JWDSendRedirectFilter.java:25) (DelegatingPluginFilter.java:74) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (ChainedFilterStepRunner.java:87) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (AbstractCachingFilter.java:33) (AbstractHttpFilter.java:31) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (AbstractEncodingFilter.java:41) (AbstractHttpFilter.java:31) (PathMatchingEncodingFilter.java:49) (AbstractHttpFilter.java:31) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (JiraStartupChecklistFilter.java:78) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (ChainedFilterStepRunner.java:87) (JiraFirstFilter.java:57) (ApplicationFilterChain.java:243) (ApplicationFilterChain.java:210) (StandardWrapperValve.java:225) (StandardContextValve.java:123) (AuthenticatorBase.java:472) (StandardHostValve.java:168) (ErrorReportValve.java:98) (StandardEngineValve.java:118) (AccessLogValve.java:927) (CoyoteAdapter.java:407) (AjpProcessor.java:200) (AbstractProtocol.java:585) (JIoEndpoint.java:310)
        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
        at java.lang.Thread.run(Unknown Source)