Error: NetOps Portal health display issues after RHEL 9.x patching
Article ID: 428810
Updated On:
Products
Issue/Introduction
The NetOps Portal web GUI fails to display server health information for the Data Aggregator (DA) following the installation of RHEL 9.6 OS patches.
SYMPTOMS:
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Portal web GUI error when viewing DA server health.
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Connection issues detected in system logs.
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DA and Data Collector (DC) services show potential disconnection.
CONTEXT: Issue occurs specifically after OS patching on the Data Aggregator server
Resolution
PREREQUISITES:
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Root or administrative access to DA and DC servers.
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Access to network security/firewall configuration.
STEPS:
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CHECK NETWORK AND SECURITY CONFIGURATION Review local firewall and security software settings. OS patching may have enabled the firewall or updated security policies that now block communication.
EXPECTED: Port access for NetOps components is open and unblocked.
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PERFORM SERVICE RESTART ON DATA COLLECTOR If the DA was updated, the DC may have disconnected. Restart the dcmd service on the Data Collector.
EXPECTED: DC reconnects to the DA.
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RESTART DATA AGGREGOR SERVICES If the GUI issue persists, stop and start the activemq and dadaemon services on the DA.
Command: systemctl stop activemq
systemctl stop dadaemon
systemctl start dadaemon
EXPECTED: Services initialize without errors.
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VALIDATE NETWORK ROUTING Ensure no internal routing changes or network device transitions are interfering with traffic between NetOps servers.
EXPECTED: Internal routing is stable and allows cross-organization traffic.
VERIFY SUCCESS:
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Log in to the Portal web GUI.
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Navigate to the DA server health page.
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Confirm health metrics are displaying correctly.
The resolution was ultimately environmental (routing), but technical steps for service restarts provide a complete troubleshooting path for other users.
Additional Information
PREVENTION: Coordinate network infrastructure changes with monitoring teams to ensure routing stability.
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