Attempts to create a new network pool in SDDC manager fail with "Failed to save network pool data. NetworkPoool Internal Server Error"

Products

• VMware SDDC Manager

Issue/Introduction

Users attempting to create a new network pool via API or UI method fails with error.

Environment

SDDC 5.x

Cause

There is a network pool present will null values

1. /var/log/vmware/vcf/commonsvcs/commonsvc.log reports a null pointer: 
 

  2026-01-20T12:29:52.603+0000 ERROR [common,xxxxxxx] [c.v.e.s.n.r.a.c.v.NetworkPoolsApiController,http-nio-127.0.0.1-7100-exec-13821] Unknown exception encountered java.lang.NullPointerException: Cannot invoke "java.lang.CharSequence.length()" because "this.text" is null 
  .. 
  2026-01-20T12:29:52.620+0000 ERROR [common,xxxxxxx] [c.v.e.s.e.h.LocalizableRuntimeExceptionHandler,http-nio-127.0.0.1-7100-exec-13821] [XXXXX] NETWORKPOOL_INTERNAL_SERVER_ERROR NetworkPoool Internal Server Error 
  com.vmware.evo.sddc.networkpool.common.NetworkPoolApiException: NetworkPoool Internal Server Error

2. Open ssh session to SDDC manager and su to root to check the current network pools.

psql -h localhost -U postgres -d platform -c "select * from vcf_network";

Output will observe a network pool with any or all of the following missing values
- Subnet
- Gateway
- vlan_id 0

3. In the SDDC Manager UI->Network settings, the network pool will also have these missing values but there will be X number of IPs being used.

Resolution

Please engage with Broadcom support team for assistance to update the Null values in the network pool