What data will be cached
How long will it updated ?
Cache will be expired in 1 hours if no one access them
How can I force clear cache ?
Navigate to setup admin page . eg. : http://localhost:2990/jira/secure/admin/SetupSlack.jspa
Scroll down and click on which cache you want to clear
slack.cache.channels.* which is public channels
slack.cache.group.* which is private channels