[AMBARI-23012] "Stale Alerts" alert appears on cluster after some time

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 2.7.0
• Labels: pull-request-available
• Assignee: Andrew Onischuk
• Reporter: Andrew Onischuk
• Created: 16/Feb/18 07:33
• Updated: 16/Feb/18 13:16
• Resolved: 16/Feb/18 08:25

Description

Previously. Every x seconds any alert was updated with information from agent.
Even if nothing changed.
Due to perf reasons this behavior was changed so that agent reports alerts
only when their status changes.

Due this change, "stale alerts" alert started appearing on clusters, showing
that alerts were not updated for a long time.

We should consider alert up-to-date to the point of last heartbeat. Which
shows that the connection between server and agent is okay due to
last_hb_timestamp, and so agent could send alert updates.

Issue Links

• links to: GitHub Pull Request #383