Name resolution issue in pvagw 4.2.1

["Knap, Giles \(DLSLtd,RAL,CEO\) via Tech-talk" <tech-talk@aps.anl.gov>]

I'm seeing the following isssue when using p4p v4.2.1.

When I set EPICS_PVA_ADDR_LIST it works fine for pvxget but fails for pvagw as follows:

$ pvagw /tmp/pvagw.config 

INFO:p4p.gw:*** Gateway STARTS now using "/tmp/pvagw.config".

INFO:p4p.gw:Client effective configuration for theclient:

INFO:p4p.gw:    EPICS_PVA_ADDR_LIST : bl01t-mo-sim-01 bl01t-di-cam-01 bl01t-ea-fastcs-01

INFO:p4p.gw:    EPICS_PVA_AUTO_ADDR_LIST : NO

INFO:p4p.gw:    EPICS_PVA_BROADCAST_PORT : 5076

INFO:p4p.gw:    EPICS_PVA_SERVER_PORT : 5075

2025-10-01T10:17:10.598392304 ERR pvxs.config EPICS_PVA_ADDR_LIST ignoring invalid 'bl01t-mo-sim-01' : Error resolving "bl01t-mo-sim-01" : nodename nor servname provided, or not known

2025-10-01T10:17:10.598754501 ERR pvxs.config EPICS_PVA_ADDR_LIST ignoring invalid 'bl01t-di-cam-01' : Error resolving "bl01t-di-cam-01" : nodename nor servname provided, or not known

2025-10-01T10:17:10.598816543 ERR pvxs.config EPICS_PVA_ADDR_LIST ignoring invalid 'bl01t-ea-fastcs-01' : Error resolving "bl01t-ea-fastcs-01" : nodename nor servname provided, or not known

pvxinfo/get is OK:

$ pip list | grep p4p

p4p                4.2.1

$ export EPICS_PVA_ADDR_LIST="bl01t-mo-sim-01 bl01t-di-cam-01 bl01t-ea-fastcs-01"

$ pvxinfo BL01T-DI-CAM-01:PVA:OUTPUT

BL01T-DI-CAM-01:PVA:OUTPUT from 10.111.7.5:5075

struct "epics:nt/NTNDArray:1.0" {

...

Downgrading to p4p 4.2.0 fixes the issue.

Regards,

giles

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