I just need to know if the JIRA service must be stopped when editing templates.
For the static ones, you can get some odd behaviour, but you can edit them while JIRA is running without running the risk of data damage. As Gabrielle says, you will need a restart to get JIRA to notice your changes.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.