Thanks for the explanation, Alejandro. I will try to schedule the rescan as you suggested.

Jiri, after analyzing the code and doing some experiments, I can verify that scheduleRescanForExistingNode is doing what it is supposed to do; I mean, enable/disable the rescan for existing nodes.

That means, if this option is false, OpenNMS is not going to schedule a rescan neither at initialization time, nor at recurring intervals defined in "Scan Interval", for the nodes defined on your system.

Keep in mind that the current OpenNMS was not implemented for distributed environments like yours.

The current code of Provisiond is not prepared for a distributed OpenNMS, so in your case, you can deal with this situation doing the following:

1) Keep scheduleRescanForExistingNode=false (this is very important)
2) Create a schedule on provisiond-configuration.xml on each P/C for each requisition you want to update at recurring intervals, for example:

<requisition-def import-name="Local-MySampleGroupOfNodes" import-url-resource="file:///opt/opennms/etc/imports/MySampleGroupOfNodes.xml">

<cron-schedule>0 0 0 * * ? *</cron-schedule>
</requisition-def>
{xml}

I haven't tested the second part yet, but it should work.

Makes sense?

When scheduleRescanForExistingNode is set to be false, the recurrent node scan is not being performed, and a manual workaround is used instead.

Jiri,

Thanks for the details. I just wanted to make sure about your current settings before trying to reproduce the problem locally. I'm going to do that to see which part of the code is not being executed when scheduleRescanForExistingNodes is false.

So far we do not have any per-provisioning group Foreign Source definition (directories etc/foreign-sources/ and etc/foreign-sources/pending/ are empty). Our default-foreign-source.xml looks like this (managed centrally by Puppet):

<foreign-source date-stamp="2012-10-31T12:37:35.614Z" name="default" xmlns="http://xmlns.opennms.org/xsd/config/foreign-source">
<scan-interval>1d</scan-interval>
<detectors>
<detector class="org.opennms.netmgt.provision.detector.icmp.IcmpDetector" name="ICMP"/>
<detector class="org.opennms.netmgt.provision.detector.snmp.SnmpDetector" name="SNMP"/>
</detectors>
<policies>
<policy class="org.opennms.netmgt.provision.persist.policies.MatchingIpInterfacePolicy" name="Persist only explicitly defined IPs">
<parameter value="DO_NOT_PERSIST" key="action"/>
<parameter value="NO_PARAMETERS" key="matchBehavior"/>
</policy>
</policies>
</foreign-source>

So it should rescan the device every day but it doesn't. I had to forceRescan several devices as described in my last comment in order to initiate the SNMP data collection.

Please let me know if you want me to do some more tests.