APPLY_TOPOLOGY_FAILED error occurs while running precheck from NVDS to VDS. Error "Failed to create VDS"
Article ID: 314222
Updated On:
Products
Issue/Introduction
When doing precheck for migration from N-VDS to VDS, it fails with following error.
"Error: Precheck is in progress with state APPLY_TOPOLOGY_FAILED. (Error code: 250012)"
Or with the error:
GetVDSUpgradeSummary: {"precheck_id": "xxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx", "precheck_status": "APPLY_TOPOLOGY_FAILED"}
The below log entries may be seen on var/log/proton/nsxapi.log where the new DVS creation is failed:
2025-09-03T11:44:51.869Z ERROR NvdsUpgradeTaskExecutor1 NvdsUpgradeReadinessCheckServiceImpl 77714 FABRIC [nsx@6876 comp="nsx-manager" errorCode="MP250008" level="ERROR" subcomp="manager"] Failed to create VDS <VDS name> on ComputeManager xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx: com.vmware.nsx.management.switching.sync.host.DvsExecutionException: FAILED_TO_CREATE_VDS_ON_VC
at com.vmware.nsx.management.nvdsupgrade.service.NvdsUpgradeReadinessCheckServiceImpl.performDvsOperations(NvdsUpgradeReadinessCheckServiceImpl.java:1479)
at com.vmware.nsx.management.nvdsupgrade.service.NvdsUpgradeReadinessCheckServiceImpl$NvdsUpgradeTask.run(NvdsUpgradeReadinessCheckServiceImpl.java:1390)
In var/log/syslog a NullPointException error is observed:
2025-09-03T11:44:51.868Z NSX 77714 FABRIC [nsx@6876 comp="nsx-manager" errorCode="MP8347" level="ERROR" subcomp="manager"] Failed to create DVS java.lang.NullPointerException
2025-09-03T11:44:51.869Z t NSX 77714 FABRIC [nsx@6876 comp="nsx-manager" errorCode="MP250008" level="ERROR" subcomp="manager"] Failed to create VDS <VDS name> on ComputeManager xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx: com.vmware.nsx.management.switching.sync.host.DvsExecutionException: FAILED_TO_CREATE_VDS_ON_VC#012#011at com.vmware.nsx.management.switching.hostswitch.dvs.service.DistributedVirtualSwitchOperationImpl.createDistributedVirtualSwitch(DistributedVirtualSwitchOperationImpl.java:876)#012#011at com.vmware.nsx.management.nvdsupgrade.service.NvdsUpgradeReadinessCheckServiceImpl.performDvsOperations(NvdsUpgradeReadinessCheckServiceImpl.java:1479)#012#011at com.vmware.nsx.management.nvdsupgrade.service.NvdsUpgradeReadinessCheckServiceImpl$NvdsUpgradeTask.run(NvdsUpgradeReadinessCheckServiceImpl.java:1390)#012#011at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)#012#011at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)#012#011at java.lang.Thread.run(Thread.java:750)#012
Environment
VMware NSX-T Data Center
Cause
The pNICs connected to NVDS admin or link state is down and when the pNIC status and speed is derived while applying topology, a NullPointExeptionError is thrown since the pNIC is down.
Resolution
Ensure Hosts status is Success/UP without any alarms.
Ensure all pNics assigned to the NVDS are up.
Additional Information
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