Performance lost contact with DA

Products

• Network Observability
• Virtual Network Assurance
• CA Performance Management

Issue/Introduction

• You observe that the Performance Center (PC) loses contact with the Data Aggregator (DA), or you experience synchronization failures.

• Below exception is seen in the PC DMServie.log:

  • jakarta.xml.ws.WebServiceException: org.apache.cxf.interceptor.Fault: Unmarshalling Error: Illegal character ((CTRL-CHAR, code <no>))

Environment

• Products:
  • DxNetOps Virtual Network Assurance (VNA) - DNAC Plugin
  • DxNetOps Performance Management
• Version: All supported versions prior to 25.4.10

Cause

This issue is seen due to control and non-printable ASCII characters being processed by the VNA DNAC plugin.

Resolution

You must update the regex in the DNAC plugin configuration to restrict hostnames to alphanumeric characters, digits, and a specific set of special characters (hyphens, underscores, dots, and spaces).

Follow these steps to implement the fix:

• Stop the Wildfly service: systemctl stop wildfly

• Delete the ActiveMQ data folder: rm -rf /opt/CA/VNA/wildfly/standalone/data/activemq

• Clear the updates directory: rm -rf /opt/CA/VNA/data/updates/*

• Backup the configuration file: Create a backup of /opt/CA/VNA/plugins/DNAC Plugin/config/inventory/client.perspective in a secure location outside of the VNA directory tree.

• Modify the configuration file: Edit /opt/CA/VNA/plugins/DNAC Plugin/config/inventory/client.perspective and replace the getDisplayName method with the code below and ensure the indentation is consistent with the existing data.

def getDisplayName( hostName )
{
  if( hostName == null || hostName == '' )
  {
      return 'Unnamed Client'
  }
  // Allow only alphanumeric, dot, dash, underscore, and space
  def displayName = hostName.replaceAll("[^a-zA-Z0-9._\\-\\x20]", "").trim()
  if( displayName.isEmpty() )
  {
      return 'Unnamed Client'
  }
  return displayName
}

• Start the Wildfly service: systemctl start wildfly

• Monitor the logs: Check /opt/CA/VNA/wildfly/standalone/log/gateway.log for any errors during startup or synchronization.

• Verify connectivity: Wait for several minutes and verify if the Performance Center successfully establishes contact with the Data Aggregator.

• Manual Resync (if necessary): If the issue persists, use the following API calls to trigger a manual resynchronization:
  • Get the SDN gateway ID from: http://<da>:<port>/rest/sdngateways
  • Run URL: http://<da>:<port>//action/sdngateway/<sdngatewayid>/inventory/resync
    • Method: POST
    • Body: Empty

If the connectivity issue remains unresolved after implementing these steps, please open a case with Broadcom Support for further investigation.