Both JIRA and Confluence application links are connected.
When i am trying to link the Confluence page from JIRA ISSUE>MORE>Confluence page
it is showing communication breakdown error.
I can't seem to recreate this problem, so it must be something unique to your environment.
Could you please try to recreate this problem in Jira once more, then immediately navigate to $JIRAHOME/log/ In this folder will be a log file called atlassian-jira.log. Look in this log for entries made at the exact time you tried to do this action in Jira. I suspect there might be some more details there that might help explain why this is happening.
Regards,
Andy
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