Re: Discovery of deleted nodes

That sounds like a bug to me.  I would open a ticket on issues.opennms.org
for it.

D

On Fri, May 4, 2018 at 8:58 AM, Shane Dawalt <[email protected]>
wrote:

>
>   So ... I reset my etc space to default and reran OpenNMS, once again
> testing discovery of a deleted IP address.  It behaved the same way.
> Clearly, it isn't a configuration-based problem.
>
>   Expecting this was a code change after 16.0, I waded through the OpenNMS
> issues database and came across HZN-572 (18.0.0).  It's an IP filter put in
> place for the move to Camel.  It prevents pinging of already discovered
> addresses.  Prior to HZN-572, the database was used for filtering already
> discovered IPs.  This worked well, because when a node is deleted, it's
> ipinterface is deleted, which allowed the IP to be rediscovered.
> Apparently, the new filter isn't aware of deleted IPs.
>
>   So list - my question has been answered.
>
>   Shane
>
> On 05/03/2018 02:05 PM, Shane Dawalt wrote:
>
>>
>> I am currently running OpenNMS 16.0.  I want to move to 21.0.5. I am
>> simply doing a new install of 21.0.5 on a separate server and rediscovering
>> network devices.  The new server is Centos 7.4.
>>
>> Discovery and SNMP are working on the 21.0.5 server.  But I am having
>> trouble rediscovering a node that I have deleted.  I am unable to find a
>> discussion of this behavior through web searches - which makes me think
>> that I have done something wrong.
>>
>> Discovery is set to look for a range of 3 IP addresses. Discovery initial
>> delay is 30 seconds, and rediscovery is 60 seconds. log4j2 is set to debug
>> level for discovery.
>>
>> To test this, I delete the node and then confirm it is deleted by
>> verifying that its corresponding rows are deleted in the node and
>> ipinterface tables of the opennms database.  Once verified, I begin
>> watching the discovery.log file.  I see Discovery begin its operation every
>> 60 seconds.  It pings only the undiscovered IP address.  It doesn't attempt
>> to ping the two previously discovered addresses (including the address of
>> the node I have deleted).  The only way I can get the deleted node to be
>> rediscovered is to restart OpenNMS.  Even restarting the discovery process
>> doesn't help. Does this seem right?  What am I missing?  Or what have I
>> done?
>>
>>   Shane
>>
>>
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