Plugin fails to add comment on JIRA issue even if it adds link to JIRA issue on "Changes" tab in Jenkins

[xalbillos]

Hi,

I have followed these steps:

1. Under Jenkins > Manage Jenkins > Jira, I have configured the plugin and used the "Validate Settings" button. It returns "Success".
2. Then, I have tried with a freestyle project and added a post-build action "Jira: Update relevant issues" and selected "Explicit selector". Then, added a specific ticket. Running that freestyle project job adds a comment on the related JIRA ticket. Everything fine until now.
3. I have configured the JIRA plugin inside a multi-branch pipeline. I have set the "issue pattern" to blank, to make sure I don't fail the regular expression and it uses the default one. I have checked the "Update Relevant Jira Issues For All Build Results" checkbox. After building from a commit that includes a JIRA ticket in the commit message, I go to the "Changes" tab of that build and see the JIRA ticket becomes a link to JIRA. I understand this means the plugin understands the ticket pattern and connects with our JIRA to form the URL. But on the JIRA ticket this run by the multi-branch pipeline branch doesn't add a comment to the JIRA ticket.

How can I troubleshoot this and see what's happening and what could be wrong ?
Thanks a lot for your help !

[rantoniuk]

What do you see in the build logs?

[xalbillos]

@rantoniuk
I don't see any logs from the plugin, no error, no nothing. Is there a way to activate a verbose mode ?

[shaishap]

This issue happens for us as well.
I don't see any error in the log. Once in the log, I did see the
org.codehaus.jettison.json.JSONException: A JSONObject text must begin with '{'
error, but I no longer see it.
It simply does nothing to the jira issue.
We use jira datacenter version 8.20.0, and jira-plugin 3.7.1

[rantoniuk]

Can you share your Jenkinsfile?