Conor Mullen conormullen908 at gmail.com
Fri Jul 3 22:32:18 UTC 2020

Hey Ismael,

I saw a similar error message when I'd broken my ipv4 host reservations in
the mysql hosts table. I had subnets with required client classes and when
I broke the host reservation for a specific mac address (I had passed in a
malformed user-context value) it spit out that same error since it didn't
register the mac in question as having a valid reservation. Are you using
client classes to gate your subnets? How are you defining reservations?

On Fri, Jul 3, 2020, 5:08 PM Ismael Suarez <Ismael_Suarez at coqui.com> wrote:

> Getting the following message:
> 2020-07-03 16:58:22.354 WARN  [kea-dhcp4.alloc-engine/3131]
> ALLOC_ENGINE_V4_ALLOC_FAIL [hwtype=1 aa:bb:cc:dd:ee:ff],
> cid=[aa:bb:cc:dd:ee:ff], tid=0xa5d749bc: failed to allocate an IPv4 address
> after 0 attempt(s)
> In the documentation I see it reads:
> %1: failed to allocate an IPv4 address after %2 attempt(s)
> The DHCP allocation engine gave up trying to allocate an IPv4 address
> after the specified number of attempts. This probably means that the
> address pool from which the allocation is being attempted is either empty,
> or very nearly empty. As a result, the client will have been refused a
> lease. The first argument includes the client identification information.
> This message may indicate that your address pool is too small for the
> number of clients you are trying to service and should be expanded.
> Alternatively, if the you know that the number of concurrently active
> clients is less than the addresses you have available, you may want to
> consider reducing the lease lifetime. In this way, addresses allocated to
> clients that are no longer active on the network will become available
> sooner.
> But the leases DB (MySQL) is empty. How can I force kea to reload / reset
> leases to start fresh?
> It was working all good, until I added a few more subnets for further
> testing, then moved a client to another network/subnet and started seeing
> the message. Maybe the subnet_id's got mixed or something down that line?
> Thanks again everyone!
> --
> Ism
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