ScriptRunner: Error when using post function after downgrade from paid version

[Robert Dailey]

I downgraded to the newest free version of the plugin, since JIRA upgraded it to the paid upgrade which I didn't want.

Now I'm getting this exception when I execute the "Assign to Workflow Step Actor Post Function" post function:

2015-09-15 10:28:22,110 http-bio-192.168.13.21-443-exec-10 ERROR chuck 628x4394x1 80zij6 192.168.23.132 /secure/WorkflowUIDispatcher.jspa [atlassian.jira.workflow.OSWorkflowManager] Caught exception while attempting to perform action 321 from workflow 22527 on issue 'FE-1698'
java.lang.NullPointerException
	at ru.andreymarkelov.atlas.plugins.AssignToStepActorFunction.execute(AssignToStepActorFunction.java:70)
	at com.opensymphony.workflow.AbstractWorkflow.executeFunction(AbstractWorkflow.java:1050)
	at com.opensymphony.workflow.AbstractWorkflow.transitionWorkflow(AbstractWorkflow.java:1446)
	at com.opensymphony.workflow.AbstractWorkflow.doAction(AbstractWorkflow.java:564)
	at com.atlassian.jira.workflow.OSWorkflowManager.doWorkflowActionInsideTxn(OSWorkflowManager.java:998)
	at com.atlassian.jira.workflow.OSWorkflowManager.doWorkflowAction(OSWorkflowManager.java:950)
	at com.atlassian.jira.bc.issue.DefaultIssueService.transition(DefaultIssueService.java:596)
	at com.atlassian.jira.bc.issue.DefaultIssueService.transition(DefaultIssueService.java:572)
	at com.atlassian.jira.web.action.workflow.SimpleWorkflowAction.doExecute(SimpleWorkflowAction.java:32)  <+1> (ActionSupport.java:165)
	at com.atlassian.jira.action.JiraActionSupport.execute(JiraActionSupport.java:88)  <+7> (DefaultInterceptorChain.java:39) (NestedInterceptorChain.java:31) (ChainedInterceptor.java:16) (DefaultInterceptorChain.java:35) (GenericDispatcher.java:225) (GenericDispatcher.java:189) (JiraWebworkActionDispatcher.java:152)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:727)  <+2> (ApplicationFilterChain.java:303) (ApplicationFilterChain.java:208)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)  <+14> (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (ChainedFilterStepRunner.java:87) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (XContentTypeOptionsNoSniffFilter.java:22) (AbstractHttpFilter.java:31) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (HeaderSanitisingFilter.java:44) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (IteratingFilterChain.java:46) (DelegatingPluginFilter.java:70)
	at com.atlassian.jira.onboarding.postsetup.ui.PostSetupAnnouncementsFilter.doFilter(PostSetupAnnouncementsFilter.java:61)  <+3> (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:70)
	at com.atlassian.jira.tzdetect.IncludeResourcesFilter.doFilter(IncludeResourcesFilter.java:40)  <+3> (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:70)
	at com.atlassian.jira.baseurl.IncludeResourcesFilter.doFilter(IncludeResourcesFilter.java:38)  <+8> (AbstractHttpFilter.java:31) (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:70) (ContextFilter.java:25) (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:70)
	at com.atlassian.greenhopper.jira.filters.ClassicBoardRouter.doFilter(ClassicBoardRouter.java:59)  <+3> (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:70)
	at com.atlassian.mywork.client.filter.ServingRequestsFilter.doFilter(ServingRequestsFilter.java:37)  <+3> (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:70)
	at com.atlassian.prettyurls.filter.PrettyUrlsSiteMeshFixupFilter.doFilter(PrettyUrlsSiteMeshFixupFilter.java:36)  <+3> (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:70)
	at com.atlassian.prettyurls.filter.PrettyUrlsDispatcherFilter.doFilter(PrettyUrlsDispatcherFilter.java:60)  <+3> (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:70)
	at com.atlassian.prettyurls.filter.PrettyUrlsSiteMeshFilter.doFilter(PrettyUrlsSiteMeshFilter.java:92)  <+3> (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:70)
	at com.atlassian.prettyurls.filter.PrettyUrlsMatcherFilter.doFilter(PrettyUrlsMatcherFilter.java:56)  <+3> (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:70)
	at com.atlassian.labs.botkiller.BotKillerFilter.doFilter(BotKillerFilter.java:36)  <+26> (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (AccessLogFilter.java:107) (AccessLogFilter.java:91) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (XsrfTokenAdditionRequestFilter.java:54) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (SiteMeshFilter.java:181) (SiteMeshFilter.java:85) (SitemeshPageFilter.java:124) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (PageBuilderFilter.java:90) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (CommittedResponseHtmlErrorRecoveryFilter.java:63) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (IteratingFilterChain.java:46) (DelegatingPluginFilter.java:70)
	at com.atlassian.prettyurls.filter.PrettyUrlsCombinedMatchDispatcherFilter.doFilter(PrettyUrlsCombinedMatchDispatcherFilter.java:61)  <+22> (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (SecurityFilter.java:239) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (TrustedApplicationsFilter.java:100) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (BaseLoginFilter.java:172) (JiraLoginFilter.java:70) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (IteratingFilterChain.java:46) (DelegatingPluginFilter.java:70) (OAuthFilter.java:79) (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:70)
	at com.atlassian.prettyurls.filter.PrettyUrlsCombinedMatchDispatcherFilter.doFilter(PrettyUrlsCombinedMatchDispatcherFilter.java:61)  <+13> (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (ProfilingFilter.java:99) (JIRAProfilingFilter.java:19) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (AbstractJohnsonFilter.java:71) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208)
	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)  <+5> (UrlRewriteFilter.java:394) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (IteratingFilterChain.java:46) (DelegatingPluginFilter.java:70)
	at com.atlassian.analytics.client.filter.JiraAnalyticsFilter.doFilter(JiraAnalyticsFilter.java:40)
	at com.atlassian.analytics.client.filter.AbstractHttpFilter.doFilter(AbstractHttpFilter.java:32)  <+3> (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (DelegatingPluginFilter.java:70)
	at com.atlassian.prettyurls.filter.PrettyUrlsCombinedMatchDispatcherFilter.doFilter(PrettyUrlsCombinedMatchDispatcherFilter.java:61)  <+45> (DelegatingPluginFilter.java:78) (IteratingFilterChain.java:42) (ServletFilterModuleContainerFilter.java:77) (ServletFilterModuleContainerFilter.java:63) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (ChainedFilterStepRunner.java:87) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (AbstractCachingFilter.java:33) (AbstractHttpFilter.java:31) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (AbstractEncodingFilter.java:41) (AbstractHttpFilter.java:31) (PathMatchingEncodingFilter.java:49) (AbstractHttpFilter.java:31) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (JiraStartupChecklistFilter.java:79) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (MultipartBoundaryCheckFilter.java:41) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (ChainedFilterStepRunner.java:87) (JiraFirstFilter.java:61) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (GzipFilter.java:115) (GzipFilter.java:92) (JiraGzipFilter.java:56) (ApplicationFilterChain.java:241) (ApplicationFilterChain.java:208) (StandardWrapperValve.java:220) (StandardContextValve.java:122) (AuthenticatorBase.java:610) (StandardHostValve.java:171) (ErrorReportValve.java:103) (StandardEngineValve.java:116) (AccessLogValve.java:950) (CoyoteAdapter.java:408) (AbstractHttp11Processor.java:1070) (AbstractProtocol.java:611) (JIoEndpoint.java:316)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Unknown Source)

 The XML for my post function on my transition looks like this:

<function type="class">
  <arg name="full.module.key">ru.andreymarkelov.atlas.plugins.utilsassign-actor-pf</arg>
  <arg name="class.name">ru.andreymarkelov.atlas.plugins.AssignToStepActorFunction</arg>
  <arg name="selectedStatus">In Development</arg>
</function>

At the moment I'm using version 3.1.4 of the plugin (downgraded from v4). I've tried removing the post-function, saving, re-adding the post function, but this failure still occurs.

[JamieA]

That workflow function is not in scriptrunner.

As an aside, a downgrade from 4 should be fine, there are no upgrade tasks in 4 that make downgrading a problem.