Getting a null pointer exception for this script - why?

Maya_Chase

I have this Scriptrunner script:

import com.atlassian.jira.component.ComponentAccessor
import org.apache.log4j.Category
import com.atlassian.jira.issue.Issue
import com.atlassian.jira.issue.IssueManager
import com.atlassian.jira.issue.MutableIssue
import com.atlassian.jira.user.ApplicationUser
import com.atlassian.jira.component.ComponentAccessor

MutableIssue issue = issue
def watcherManager = ComponentAccessor.getWatcherManager();
def userManager = ComponentAccessor.getUserManager()
def user1 = userManager.getUserByKey('flaurentine')

if (issue.getReporterId() in ['machase' <and a list of other ids>])
{
watcherManager.startWatching(user1, issue)
}

-----------------------------

I get no errors when saving the script, but when I run it I get:

2018-01-04 11:07:00,157 ERROR [workflow.ScriptWorkflowFunction]: *************************************************************************************
2018-01-04 11:07:00,157 ERROR [workflow.ScriptWorkflowFunction]: Script function failed on issue: null, actionId: 1, file: <inline script>
java.lang.NullPointerException
	at com.google.common.base.Preconditions.checkNotNull(Preconditions.java:210)
	at com.google.common.cache.LocalCache$LocalManualCache.invalidate(LocalCache.java:4764)
	at com.atlassian.jira.issue.watchers.DefaultWatcherManager.updateWatch(DefaultWatcherManager.java:167)
	at com.atlassian.jira.issue.watchers.DefaultWatcherManager.startWatching(DefaultWatcherManager.java:84)
	at com.atlassian.jira.issue.watchers.DefaultWatcherManager.startWatching(DefaultWatcherManager.java:75)
	at com.atlassian.jira.issue.watchers.WatcherManager$startWatching.call(Unknown Source)
	at Script206.run(Script206.groovy:32)

So apparently it doesn't like my watcherManager statement, but I don't know why? I've checked and user1 is what I expect it to be. By process of elimination I'm misusing "issue" but I don't know how to fix it. Please help. Thank you!

Alexey Matveev

Hello,

Where do you execute the script?

you should log values to your log to be sure that issue and user1 are not null.

log.error(issue)

log.error(user1)

Then have a look at the logs.