VCF Operations for Logs UI hangs on loading page after NTP server update

Products

• VCF Operations

Issue/Introduction

When attempting to log in to the VMware Cloud Foundation (VCF) Operations for Logs (formerly vRealize Log Insight) user interface, the page remains stuck on the loading animation after credentials are provided. Authentication does not complete, and the dashboard is never displayed.

Environment

VCF Operations for logs 9.x

Cause

This issue occurs when multiple, conflicting NTP servers are configured across the cluster nodes. If legacy NTP servers are not removed after adding new ones (common during DC migrations), the resulting time synchronization drift or DNS resolution failures on old entries prevent the UI from completing the secure authentication handshake.

Resolution

To resolve this issue, you must manually clean up the NTP configuration on each node in the cluster.

Step 1: Identify and Remove Legacy NTP Servers

1. Log in to the VCF Operations for Logs node via SSH as the root user.
2. Open the NTP configuration file for editing:

   vi /etc/ntp.conf

3. Locate the server entries. Identify the legacy NTP server IP addresses or FQDNs.
4. Remove the lines associated with the old NTP servers.
5. Ensure the new NTP servers are correctly listed. You may add the prefer keyword to your primary server entry: server <New_NTP_IP> prefer
6. Save and close the file (:wq).

Step 2: Restart Log Insight Services

This command will make changes to your system. Review it carefully before running.

service loginsight restart