EAP packets from 2 different upstream servers

[Alex Sharaz]

Hi,
I'm seeing quite a few
Mon Sep 18 15:02:40 2017 : Warning: EAP packets are arriving from two
different upstream servers.  Has there been a proxy fail-over?

messages on my ORPS servers  and I'm trying to find out where they come
from.
In normal log file they appear as shown.

Mon Sep 18 15:02:34 2017 : Auth: (46576)   Login OK: [sa1043 at york.ac.uk]
(from client roaming1.ja.net port 0 cli 48-74-6E-A3-67-2D
 via TLS tunnel)
Mon Sep 18 15:02:36 2017 : Auth: (46591)   Login OK: [hi555 at york.ac.uk]
(from client roaming0.ja.net6 port 8 cli 0C-D7-46-D9-46-66
 via TLS tunnel)
Mon Sep 18 15:02:36 2017 : Auth: (46592) Login OK: [hi555 at york.ac.uk] (from
client roaming0.ja.net6 port 8 cli 0C-D7-46-D9-46-66)
Mon Sep 18 15:02:40 2017 : Warning: EAP packets are arriving from two
different upstream servers.  Has there been a proxy fail-over?
Mon Sep 18 15:02:40 2017 : Auth: (46608) Login OK: [jr1236 at york.ac.uk]
(from client roaming1.ja.net port 0 cli CC-3A-61-EC-61-7A)
Mon Sep 18 15:02:41 2017 : Auth: (46612) Login incorrect (eap: rlm_eap
(EAP): No EAP session matching state 0x8cdc674b8cdd7eac): [gdv504 at york.ac.uk]
(from client roaming2.ja.net6 port 53 cli 38-0F-4A-30-B2-9C)
Mon Sep 18 15:02:43 2017 : Auth: (46619) Login OK: [hbna500 at york.ac.uk]
(from client roaming0.ja.net port 8 cli 60-92-17-A5-51-75)
Mon Sep 18 15:02:44 2017 : Info: Need 1 more connections to reach 10 spares


However, when I try running FR in degug mode I never see the above errors.

Have also tried running raddebug to dump output into another file ... and
 the normal file still has the aforementioned Warnings but the raddebug
doesn't

How am I supposed to get more info about the what the message relates to?

BTW running 3.0.15

Rgds
Alex