AvailabilityMonitor

This monitor tests reachability of a node by using the isReachable method of the InetAddress java class. The service is considered available if isReachable returns true. See Oracle’s documentation for more details.

Important

This monitor is deprecated in favour of the IcmpMonitor monitor. You should only use this monitor on remote pollers running on unusual configurations (See below for more details).

Monitor facts

Class Name

org.opennms.netmgt.poller.monitors.AvailabilityMonitor

Remote Enabled

true

Configuration and Usage

Table 1. Monitor specific parameters for the AvailabilityMonitor
Parameter	Description	Required	Default value
`retry`	Number of attempts to have the isReachable method return true.	optional	`3`
`timeout`	Timeout for the isReachable method, in milliseconds.	optional	`3000`

Examples

<service name="AVAIL" interval="300000" user-defined="false" status="on">
  <parameter key="retry" value="2"/>
  <parameter key="timeout" value="5000"/>
</service>

<monitor service="AVAIL" class-name="org.opennms.netmgt.poller.monitors.AvailabilityMonitor"/>

IcmpMonitor vs AvailabilityMonitor

This monitor has been developped in a time when the IcmpMonitor monitor wasn’t remote enabled, to circumvent this limitation. Now, with the JNA ICMP implementation, the IcmpMonitor monitor is remote enabled under most configurations and this monitor shouldn’t be needed -unless you’re running your remote poller on such an unusual configuration (See also issue NMS-6735 for more information)-.