We are moving from Mantis to JIRA and wish to keep Mantis alive for some time until the migration is complete and all the users are migrated.
All users (esp. the dev team) that have been migrated to JIRA shouldn't continue with Mantis (maybe deactivate accounts) and concentrate on JIRA alone.
Thus if a Mantis issue that was migrated to JIRA gets fixed/commented (in JIRA) the new status should be synchronized to the still existing Mantis issue.
And (if possible) new issues that are created in Mantis should be automatically be added to JIRA (if this is not possible then thats OK too)
Does anybody know of a tool or plugin that can do this?
I do not know any tool that does it, but in our company we have successfully implemented sync tool for Jira<->Footprints and Jira<->CRM. It would use Jira SOAP API (or REST starting from 5.0) and Mantis SOAP API. This tool can regularly check issues in both systems and update them accordingly.
Jira SOAP API - http://docs.atlassian.com/software/jira/docs/api/rpc-jira-plugin/latest/index.html?com/atlassian/jira/rpc/soap/JiraSoapService.html
Jira REST API - https://developer.atlassian.com/display/JIRADEV/JIRA+REST+APIs