Clear Alert Messages
Alerts are cleared when the alert condition, as defined by the rulebase, ceases to exist. Alerts generated by tests on synchronous data sources, which deliver data at fixed intervals, are cleared by default at the first test repetition when the condition no longer holds. Alerts generated by tests on asynchronous data sources, which deliver data when it becomes available, are cleared by default when the test does not evaluate to true for 15 minutes. You can modify this default behavior using advanced test and action properties in the rule. For more information, see the TIBCO Hawk Console User’s Guide.
When you create an action that creates an alert, you may find it useful to include text that describes how the alert is cleared. For example, if an alert is raised when free disk space falls below 10% and is cleared only when disk space is above 15%, the alert text could be: "Free disk space is 11.6%; this alert will be cleared when the free disk space exceeds 15%. "
Active alerts are kept until cleared, and cleared alerts are purged by TIBCO Hawk Console when a buffer limit is reached. To view purged alerts, you can examine Event Service data files (if configured), where all alerts are written as they are raised and cleared. For more information on the TIBCO Hawk Event Service, see the TIBCO Hawk Installation, Configuration, and Administration Guide.