Unable to upgrade vCenter from 7.0 U2b to 8.0 version, precheck fails with error "Unable to read netdumper port from netdumper configuration!"

Products

• VMware vCenter Server 7.0

Issue/Introduction

• vCenter server upgrade from 7.0 U2b to 8.X version failed at precheck stage. 
• Error snippets:

• From requirements-upgrade-runner.log

YYYY-MM-DDTHH:MM:SS.627Z INFO upgrade.states.component_states netdump:CollectRequirements: YYYY-MM-DDTHH:MM:SS.415Z INFO extensions Executing upgrade phase '<module 'netdump' from '/var/tmp/vmware-upgrade-requirements/cis-upgrade-runner/payload/component-scripts/netdump/__init__.py'>:CollectRequirements' with context {'sourceVcVersion': '7.0', 'sourceSsoVersion': '7.0', 'sourcePlatform': 'Linux', 'destinationVcVersion': '8.0', 'destinationSsoVersion': '8.0', 'destinationPlatform': 'Linux', 'locale': 'en', 'systemExportDir': '/var/tmp/vmware-upgrade-requirements/cis-upgrade-runner/upgrade_working_directory/system-data', 'resourceDir': '/var/tmp/vmware-upgrade-requirements/cis-upgrade-runner/upgrade_working_directory', 'devMode': False, 'sourceSsoUsername': None, 'sourceSsoPassword': 'CENSORED', 'sourceManagementAddress': 'w4-hs1-l1036.eng.vmware.com', 'sourceManagementUsername': 'root', 'sourceManagementPassword': 'CENSORED', 'sourceManagementPort': 443, 'sourceManagementThumbprint': None, 'targetManagementAddress': 'w4-hs1-l1036.eng.vmware.com', 'targetManagementUsername': 'root', 'targetManagementPassword': 'CENSORED', 'targetManagementPort': 443, 'targetManagementThumbprint': None, 'logDir': '/var/log/vmware/upgrade'}.
YYYY-MM-DDTHH:MM:SS.627Z INFO upgrade.states.component_states netdump:CollectRequirements: YYYY-MM-DDTHH:MM:SS.415Z INFO netdump.netdump_upgrader Netdumper port from netdumper config file is NETDUMP_SVCPORT_VALUE@@
YYYY-MM-DDTHH:MM:SS.627Z INFO upgrade.states.component_states netdump:CollectRequirements: YYYY-MM-DDTHH:MM:SS.415Z ERROR netdump.netdump_upgrader Netdumper Ports Req Mismatch Error - ValueError("invalid literal for int() with base 10: 'NETDUMP_SVCPORT_VALUE@@'").
YYYY-MM-DDTHH:MM:SS.628Z INFO upgrade.states.component_states netdump:CollectRequirements: YYYY-MM-DDTHH:MM:SS.415Z ERROR netdump.netdump_upgrader Unable to read netdumper port from netdumper configuration!
YYYY-MM-DDTHH:MM:SS.628Z INFO upgrade.states.component_states netdump:CollectRequirements: YYYY-MM-DDTHH:MM:SS.415Z INFO extensions The component script returned '{'coreRequirement': {'requiredSrcDiskSpace': 0.0001, 'requiredDstDiskSpace': {'/storage/netdump': 0.0001}, 'exportEstimationTime': 1, 'importEstimationTime': 1}, 'dstPortSpecs': [], 'srcPorts': [], 'userOptionSpecs': [], 'installArguments': {}, 'extraArguments': {}, 'requirementMismatchSpecs': [{'text': vSphere ESXi Dump Collector Ports!, 'description': Unable to read netdumper port from netdumper configuration!, 'resolution': Netdumper port in Netdumper configuration is unreadable. The Netdumper configuration may be corrupted. Please contact customer support and submit a support bundle., 'problemId': None, 'severity': 'ERROR'}]}'
YYYY-MM-DDTHH:MM:SS.628Z INFO upgrade.states.component_states netdump:CollectRequirements: STDERR: /var/tmp/vmware-upgrade-requirements/cis-upgrade-runner/payload/componentPhaseLauncher.py:86: DeprecationWarning: the imp module is deprecated in favour of importlib; see the module's documentation for alternative uses
YYYY-MM-DDTHH:MM:SS.628Z INFO upgrade.states.component_states netdump:CollectRequirements: STDERR:   import imp
YYYY-MM-DDTHH:MM:SS.628Z INFO upgrade.states.component_states netdump:CollectRequirements: Script completed for 0.6876258850097656 secs with return-code='0', and executionId=0fb3054f-b674-4364-a8a0-c8b9834eda1a
YYYY-MM-DDTHH:MM:SS.629Z INFO upgrade.states.component_states netdump:CollectRequirements: Remote Command Returned: {'coreRequirement': {'requiredSrcDiskSpace': 0.01, 'requiredDstDiskSpace': {'/storage/netdump': 0.01}, 'exportEstimationTime': 1, 'importEstimationTime': 1}, 'dstPortSpecs': [], 'srcPorts': [], 'userOptionSpecs': [], 'installArguments': {}, 'extraArguments': {}, 'requirementMismatchSpecs': [{'text': vSphere ESXi Dump Collector Ports!, 'description': Unable to read netdumper port from netdumper configuration!, 'resolution': Netdumper port in Netdumper configuration is unreadable. The Netdumper configuration may be corrupted. Please contact customer support and submit a support bundle., 'problemId': None, 'severity': 'ERROR'}]}
YYYY-MM-DDTHH:MM:SS.629Z INFO upgrade.states.component_states netdump:CollectRequirements: Completed successfully.
YYYY-MM-DDTHH:MM:SS.642Z INFO wf.wf_processor State CollectRequirements com.vmware.netdump has succeeded.

 

Environment

• vCenter Server 7.0 U2b

Cause

Its a known issue with vCenter server running on version 7.0 U2b.

Resolution

This issue has been resolved in 7.0 U3 and later version. 

Note: While performing the upgrade of the vCenter from 7.0 U2b to 8.x, first patching the vCenter version of 7.0 U3 or later and then upgrade the vCenter to 8.x