Conditions are associated with entities. These conditions represent the state of the entity. Here are some examples of conditions:
Condition | Description |
---|---|
CONDDEATH | The entity has died. |
CONDABNORMALDEATH | The entity has died an abnormal death. This condition is triggered whenever an entity dies by a mechanism that results in the generation of a core file (see dumper in the Utilities Reference for details). |
CONDDETACH | The entity that was being monitored is detaching. This ends HAM's monitoring of that entity. |
CONDATTACH | An entity for which a placeholder was previously created (someone has subscribed to events relating to this entity), has joined the system. This is also the start of the monitoring of the entity by a HAM. |
CONDHBEATMISSEDHIGH | The entity missed sending a heartbeat message specified for a condition of high severity. |
CONDHBEATMISSEDLOW | The entity missed sending a heartbeat message specified for a condition of low severity. |
CONDRESTART | The entity was restarted. This condition is true after the entity is successfully restarted. |
CONDRAISE | An externally detected condition is reported to a HAM. Subscribers can associate actions with these externally detected conditions. |
CONDSTATE | An entity reports a state transition to a HAM. Subscribers can associate actions with specific state transitions. |
CONDANY | This condition type matches any condition type. It can be used to associate the same actions with one of many conditions. |
The conditions described above with the exception of CONDSTATE, CONDRAISE and CONDANY are automatically detected and/or triggered by a HAM (i.e., the HAM is the publisher of the conditions). The CONDSTATE and CONDRAISE conditions are published to a HAM by external detectors. For all conditions, subscribers can associate with lists of actions that will be performed in sequence when the condition is triggered. Both the CONDSTATE and CONDRAISE conditions provide filtering capabilities so the subscribers can selectively associate actions with individual conditions, based on the information published.
Conditions are also associated with symbolic names, which also need to be unique within an entity.