I am not sure whether its working or not, My Question here is if i want to run 2 JIRA instance and front end is apache with proxy load balancer. does this setup works or not or anyone can help me with better solution for load balancing Jira, Confluence & core.
No, it will not work. JIRA has never done any form of clustering really. Confluence had a "clustered" installation up until about 5.5, but that has been deprecated, and it had limited uses anyway.
If you do need to cluster JIRA and/or Confluence, you need to move on to the "Data Centre" versions of the products, which do support clustering fully. Start at https://www.atlassian.com/enterprise/data-center (to defuse the first question you'll probably ask - yes, your existing installations can be converted to data-center with a minimum of effort)
I have multiple projects that use variations of the same base workflow. The variations depend on the requirements of the project or issue type. The variations mostly come in the form of new statuses ...
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