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From "Jonathan Hurley (JIRA)" <j...@apache.org>
Subject [jira] [Created] (AMBARI-15686) Alert Dispatch Scheduling Changes to Support Repeat Tolerance
Date Mon, 04 Apr 2016 15:32:25 GMT
Jonathan Hurley created AMBARI-15686:
----------------------------------------

             Summary: Alert Dispatch Scheduling Changes to Support Repeat Tolerance
                 Key: AMBARI-15686
                 URL: https://issues.apache.org/jira/browse/AMBARI-15686
             Project: Ambari
          Issue Type: Task
          Components: ambari-server
    Affects Versions: 2.4.0
            Reporter: Jonathan Hurley
            Assignee: Jonathan Hurley
            Priority: Critical
             Fix For: 2.4.0


When an alert state change is received, its notification will no longer be queued for immediate
delivery if the firmness of the alert is SOFT. Instead, notifications will only be created
and queued for delivery if the alert firmness is HARD in order to prevent false positives
on alerts which have repeat tolerance enabled. 

Changes Included in this task:
- Database changes to support HARD/SOFT states to complement repeat occurrence values
{code}
CREATE TABLE alert_current (
  ...
  occurrences BIGINT NOT NULL DEFAULT 1,
  firmness VARCHAR(255) NOT NULL DEFAULT 'HARD',
  ...
);
{code}

- Changes to eventing system to handle alert state changes difference depending on whether
the alerts are HARD/SOFT
- HARD/SOFT Calculations
-- If an alert is {{AlertState#OK}}, then the firmness is always {{AlertFirmness#HARD}}
-- If an alert is {{link SourceType#AGGREGATE}}, then the firmness is always {{link AlertFirmness#HARD}}.
-- Otherwise, the firmness will be {@link AlertFirmness#SOFT} unless the repeat tolerance
has been met.

- Exposure of HARD/SOFT alert states
{code}
GET api/v1/clusters/c1/alerts/1
{
  "href": "http://localhost:8080/api/v1/clusters/c1/alerts/1",
  "Alert": {
    "cluster_name": "c1",
    ...
    "repeat_tolerance": 1,
    "repeat_tolerance_remaining": 0,
    "occurrences": 8,
    "firmness": "HARD"
    ....
{code}



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