Issue Summary

After enabling the dark feature for async webhook and restarting Jira, webhook payloads fail to send Parent Link data, especially when we have new hierarchy level (Admin > Manage apps > Hierarchy configuration) and one of this level issue set as parent.

This is reproducible on Data Center: yes

Steps to Reproduce

1. Setup a webhook destination in Jira
   • Admin > System > Webhooks
2. Enable the webhook debug to 
   • Admin > System > Logging and Profiling > Set com.atlassian.webhooks with debug verbose log
3. Fire an event that sends a webhook payload and observe the result.
4. In Jira software enable the async webhook dark feature
   • In jiraurl/secure/admin/SiteDarkFeatures!default.jspa add/enable the "com.atlassian.jira.webhookEventsAsyncProcessing.enabled" dark feature
5. Restart the Jira instance
6. Reproduce steps 2 and 3 and observe the results. 

Expected Results

The webhook payload is completely populated.

Actual Results

The custom field "Parent Link" is not populated as expected.

Below we have the payload when:

• sync webhook is being used (without the async dark feature and Jira restarted):

  (...)
  event {7}
  body {5}
  issue{4}
  fields{81}
  ...
  created: 2024-03-25T20:38:01.294-0300
  creator{8}
  customfield_10000{summaryBean=com.atlassian.jira.plugin.devstatus.rest.SummaryBean@5067ce07[summary={pullrequest=com.atlassian.jira.plugin.devstatus.rest.SummaryItemBean@292e35ab[overall=PullRequestOverallBean{stateCount=0, state='OPEN', details=PullRequestOverallDetails{openCount=0, mergedCount=0, declinedCount=0}},byInstanceType={}], build=com.atlassian.jira.plugin.devstatus.rest.SummaryItemBean@33b96b37[overall=com.atlassian.jira.plugin.devstatus.summary.beans.BuildOverallBean@6be28386[failedBuildCount=0,successfulBuildCount=0,unknownBuildCount=0,count=0,lastUpdated=<null>,lastUpdatedTimestamp=<null>],byInstanceType={}], review=com.atlassian.jira.plugin.devstatus.rest.SummaryItemBean@69287661[overall=com.atlassian.jira.plugin.devstatus.summary.beans.ReviewsOverallBean@37e44df5[stateCount=0,state=<null>,dueDate=<null>,overDue=false,count=0,lastUpdated=<null>,lastUpdatedTimestamp=<null>],byInstanceType={}], deployment-environment=com.atlassian.jira.plugin.devstatus.rest.SummaryItemBean@4ffc68ed[overall=com.atlassian.jira.plugin.devstatus.summary.beans.DeploymentOverallBean@30fd2c27[topEnvironments=[],showProjects=false,successfulCount=0,count=0,lastUpdated=<null>,lastUpdatedTimestamp=<null>],byInstanceType={}], repository=com.atlassian.jira.plugin.devstatus.rest.SummaryItemBean@1accdf27[overall=com.atlassian.jira.plugin.devstatus.summary.beans.CommitOverallBean@fd2b26e[count=0,lastUpdated=<null>,lastUpdatedTimestamp=<null>],byInstanceType={}], branch=com.atlassian.jira.plugin.devstatus.rest.SummaryItemBean@23c51879[overall=com.atlassian.jira.plugin.devstatus.summary.beans.BranchOverallBean@7a009432[count=0,lastUpdated=<null>,lastUpdatedTimestamp=<null>],byInstanceType={}]},errors=[],configErrors=[]], devSummaryJson={"cachedValue":{"errors":[],"configErrors":[],"summary":{"pullrequest":{"overall":{"count":0,"lastUpdated":null,"stateCount":0,"state":"OPEN","details":{"openCount":0,"mergedCount":0,"declinedCount":0,"total":0},"open":true},"byInstanceType":{}},"build":{"overall":{"count":0,"lastUpdated":null,"failedBuildCount":0,"successfulBuildCount":0,"unknownBuildCount":0},"byInstanceType":{}},"review":{"overall":{"count":0,"lastUpdated":null,"stateCount":0,"state":null,"dueDate":null,"overDue":false,"completed":false},"byInstanceType":{}},"deployment-environment":{"overall":{"count":0,"lastUpdated":null,"topEnvironments":[],"showProjects":false,"successfulCount":0},"byInstanceType":{}},"repository":{"overall":{"count":0,"lastUpdated":null},"byInstanceType":{}},"branch":{"overall":{"count":0,"lastUpdated":null},"byInstanceType":{}}}},"isStale":false}}
  ...
  customfield_10108: SBP-1
  (...)
  

  The custom field 10108 relates to Parent Link

• async webhooks is used and restart your Jira (before restart it will not fail)

  event{7}
  body{5}
  issue{4}
  fields{81}
  ...
  created: 2024-03-25T20:33:53.299-0300
  creator{8}
  customfield_10000:{}
  customfield_10100: null
  ...
  customfield_10108: null
  (...)
  

  The custom field 10108 relates to Parent Link. Note the custom field 10000 ("Development") did not present data as well.

Workaround

Disable async webhooks and restart Jira:

• Go to jiraurl/secure/admin/SiteDarkFeatures!default.jspa and disable the "com.atlassian.jira.webhookEventsAsyncProcessing.enabled" dark feature
• Restart the instance.

 The workaround doesn't work in Jira 10 as Webhooks work in async mode there by default, even without  com.atlassian.jira.webhookEventsAsyncProcessing.enabled dark feature enabled.