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"Failed to get Session by Unexpected error" occasionally occurs if you operate in the following steps.

  1. Open Jira issue detail screen.
  2. Open another tab of the browser before the Alfresco panel is completely loaded.
  3. Go back to tab of Jira issue detail screen.
  4. "Failed to get Session by Unexpected error" occures.


Analytics Client Plugin put an HTTP header called x-atlassian-mau-ignore. This header causes Alfresco's CORS to be restricted and an error.



There are two possosible workarounds.

  1. Disable Analytics Client Plugin.
    1. Login to Jira as Jira administrator
    2. Go to Manage add-ons
    3. Select System
    4. Find and Disable Analytics Client Plugin
  2. Put x-atlassian-mau-ignore to cors.supportedHeaders in Alfresco's CORS setting.
    1. Open and Edit /opt/alfresco-content-services/tomcat/webapps/alfresco/WEB-INF/web.xml
    2. Find cors.supportedHeaders and put x-atlassian-mau-ignore.

    3. Restart Alfresco.


Atlassian Community : What is the 'x-atlassian-mau-ignore' header & why is my JIRA server rejecting it?

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