VNA Gateway shows Operational DOWN Administration UP

Products

• Network Observability
• Virtual Network Assurance
• CA Performance Management

Issue/Introduction

In DX NetOps, the Virtual Network Assurance (VNA) component displays an
Administrative-Status of UP, but an Operational Status of DOWN.
When reviewing the Data Collector logs, you may observe the SDN connection closing
abnormally and continually failing to reconnect. The logs will display entries similar to the
following:

2026-05-19T17:44:50,420 | ERROR | Grizzly(1) | SDNInventory
.impl.SdnInventory UpdateListener 815 | -1 | SDN connection 4080249
is closed with reason: Close Reason: code [1006], reason [Closed
abnormally.]. Set the OperStatus to DOWN with error code SUCCESS

2026-05-19T17:49:50,699 | INFO | nnector- thread-1 | SDNInventory
a.im.dm.sdn.config.SdnGatewayMgr 497 | || Failed to reconnect SDN
Gateway 4080249 with start time: Tue May 19 17:25:00 2026 - 0400

Environment

DX NetOps Performance Management

DX NetOps Virtual Network Assurance

Cause

This issue is caused by a race condition between WildFly and MySQL, typically occurring during a post-upgrade restart or a general system reboot.

● WildFly begins deploying its applications at the same time MySQL is shutting down or restarting.
● WildFly's Hibernate layer attempts to connect to MySQL exactly as the database goes offline.
● Because of the timing, WildFly exhausts its 3 connection retry attempts and permanently fails to build its Hibernate SessionFactories.
● As a result, WildFly continues to run but in a severely degraded state (e.g., with numerous failed services), causing the VNA operational status to remain DOWN.

Resolution

To resolve the issue, you must fully restart the services in the correct sequence to ensure MySQL is fully operational before WildFly attempts to connect.
Perform the following steps on the VNA server:

1. Stop the WildFly service.
2. Stop the MySQL service.
3. Start the MySQL service. Verify that the database is fully up and running.
4. Start the WildFly service.

Once WildFly has fully started with an active MySQL connection, verify that the VNA Operational Status returns to UP and the Data Collector successfully reconnects to the SDN gateway.