Subtask assignee are not modified on listener

[Pablo A. Revert]

Hi, I need to update subtasks assignees of issue to "Project Manager" when "Project Manager" field is changed.

I've made a Listener on IssueUpdate with the following script:

import com.atlassian.jira.component.ComponentAccessor
import com.atlassian.jira.event.issue.IssueEvent
import com.atlassian.jira.event.issue.field.AbstractCustomFieldEvent
import com.atlassian.jira.issue.changehistory.ChangeHistoryManager
import com.atlassian.jira.event.type.EventDispatchOption
import com.atlassian.jira.issue.MutableIssue
import com.atlassian.jira.issue.IssueManager


ChangeHistoryManager changeHistoryManager = ComponentAccessor.getChangeHistoryManager()

def issue = event.issue

if (issue.getIssueType().getName() == "Purchase Order") {
def changes = changeHistoryManager.getChangeHistories(event.issue)
def change = changes.last()

for (i in change.getChangeItemBeans()) 
  if (i.getField() == "Project Manager"){

    def user = ComponentAccessor.getJiraAuthenticationContext().getLoggedInUser()

    def subTaskManager = ComponentAccessor.getSubTaskManager()
    IssueManager issueManager = ComponentAccessor.getIssueManager()
    def userManager = ComponentAccessor.getUserManager()

    Collection subTasks = issue.getSubTaskObjects()

    for (s in subTasks) {
      def subtask = issueManager.getIssueObject(s.id) as MutableIssue;
      if (i.getTo() != null) {
         def assignee = userManager.getUserByKey(i.getTo()) 
         log.warn(subtask)
         log.warn(assignee)
         subtask.setAssignee(assignee)
         issueManager.updateIssue(assignee, issue, EventDispatchOption.ISSUE_UPDATED, true)
      }
    }
  } 
}

The listener ends ok, and from the log I could check that the subtask are correctly detected, and also is assignee, but when I check the subtasks assignee value has not been changed.

Any one could detecte the incident?

[PD Sheehan]

This line

issueManager.updateIssue(assignee, issue, EventDispatchOption.ISSUE_UPDATED, true)

Is attempting to save the source issue rather than the subTask

Change it to

issueManager.updateIssue(assignee, subtask, EventDispatchOption.ISSUE_UPDATED, true)