We're getting an (instant) timeout exception when attempting to Generate Release Notes:

Console output:

11:23:22 FATAL: Unable to generate release notes for JIRA version RPM 0.1.3-8/VSA: java.util.concurrent.TimeoutException: Timeout waiting for task.
11:23:22 java.util.concurrent.TimeoutException: Timeout waiting for task.
11:23:22 	at com.google.common.util.concurrent.AbstractFuture$Sync.get(AbstractFuture.java:259)
11:23:22 	at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:91)
11:23:22 	at com.google.common.util.concurrent.ForwardingFuture.get(ForwardingFuture.java:69)
11:23:22 	at com.atlassian.jira.rest.client.internal.async.DelegatingPromise.get(DelegatingPromise.java:113)
11:23:22 	at hudson.plugins.jira.JiraRestService.getIssuesFromJqlSearch(JiraRestService.java:197)
11:23:22 	at hudson.plugins.jira.JiraSession.getIssuesWithFixVersion(JiraSession.java:178)
11:23:22 	at hudson.plugins.jira.JiraSite.getReleaseNotesForFixVersion(JiraSite.java:955)
11:23:22 	at hudson.plugins.jira.JiraCreateReleaseNotes.setUp(JiraCreateReleaseNotes.java:132)
11:23:22 	at jenkins.tasks.SimpleBuildWrapper.setUp(SimpleBuildWrapper.java:146)
11:23:22 	at hudson.model.Build$BuildExecution.doRun(Build.java:157)
11:23:22 	at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:504)
11:23:22 	at hudson.model.Run.execute(Run.java:1818)
11:23:22 	at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
11:23:22 	at hudson.model.ResourceController.execute(ResourceController.java:97)
11:23:22 	at hudson.model.Executor.run(Executor.java:429)

The log output isn't much different:

Apr 12, 2019 11:23:22 AM FINE hudson.plugins.jira.JiraSession

Fetching versions from project: VSA with fixVersion:RPM 0.1.3-8

Apr 12, 2019 11:23:22 AM WARNING hudson.plugins.jira.JiraRestService getIssuesFromJqlSearch

jira rest client timeout from jql search error. cause: Timeout waiting for task.
java.util.concurrent.TimeoutException: Timeout waiting for task.
        at com.google.common.util.concurrent.AbstractFuture$Sync.get(AbstractFuture.java:259)
         at com.google.common.util.concurrent.AbstractFuture.get(AbstractFuture.java:91)
         at com.google.common.util.concurrent.ForwardingFuture.get(ForwardingFuture.java:69)
         at com.atlassian.jira.rest.client.internal.async.DelegatingPromise.get(DelegatingPromise.java:113)
         at hudson.plugins.jira.JiraRestService.getIssuesFromJqlSearch(JiraRestService.java:197)
         at hudson.plugins.jira.JiraSession.getIssuesWithFixVersion(JiraSession.java:178)
         at hudson.plugins.jira.JiraSite.getReleaseNotesForFixVersion(JiraSite.java:955)
         at hudson.plugins.jira.JiraCreateReleaseNotes.setUp(JiraCreateReleaseNotes.java:132)
         at jenkins.tasks.SimpleBuildWrapper.setUp(SimpleBuildWrapper.java:146)
         at hudson.model.Build$BuildExecution.doRun(Build.java:157)
         at hudson.model.AbstractBuild$AbstractBuildExecution.run(AbstractBuild.java:504)
         at hudson.model.Run.execute(Run.java:1818) at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:43)
         at hudson.model.ResourceController.execute(ResourceController.java:97)
         at hudson.model.Executor.run(Executor.java:429)

The Release version is queried from Jira using Jira Release Version Parameter, which is working perfectly - but I have also tried to hardcode the string.

I've attempted to change Environment Variables, address another JIRA project and the Additional Issue Filter etc. but to no avail.

I did also attempt to downgrade the plugin (to 3.0.2, which is the only one available. Unfortunately I'm immediately told I need to upgrade to 3.0.5. > Attempting to run the job on 3.0.2 results in a nullpointer exception.

Finally, I've been fiddling with access rights on JIRA, but it seems to have no affect whatsoever.