VUM stops working when one of the VCs is patched to 6.7 P01 in enhanced linked mode with error "Could not resolve dependencies for plugins packages"

Products

• VMware vCenter Server

Issue/Introduction

To use the Update manager in mixed versions.

Symptoms:

• During the patch update of vCenters in enhanced linked mode, when one of the vCenter is updated to later patch VMware Update Manager(VUM) stops working.
• The update manager tab goes missing on the other vCenter servers which are in lower build.
• The VUM plugins are only visible for the upgraded vCenter in HTML client.
• In the vSphere_client_virgo.log  similar entry is seen

[2020-01-27T18:47:27.336Z] [ERROR] e-extension-mngr-pool-103736 70079665 109838 200093 com.vmware.vise.extensionfw.impl.PackagesDeployer                 Could not resolve dependencies for plugins packages: [ com.vmware.vum.client:6.7.0.41905 requires: [ com.vmware.vsphere.client.html greaterOrEqual 6.7.0.30000 ]; ];

Note:The preceding log excerpts are only examples.Date,time and environmental variables may vary depending on your environment.

Environment

VMware vCenter Server Appliance 6.7.x

Cause

Newest VUM version i.e. the one provided by the 6.7 P01 vCenter Server is not compatible with 6.7 U1 vSphere HTML Client due to the Client version being lower than the required one.

Resolution

Currently there is no resolution.

Workaround:

1. Open the plugin-package.xml from the below location
2. Location: /etc/vmware/vsphere-ui/cm-service-packages/com.vmware.cis.vsphereclient.plugin/com.vmware.vum.client-6.7.0.41905/plugin-package.xml
3. Change version=“6.7.0.30000” to version=“6.7.0.20000"
4. Restart the vSphere Client using below command,

service-control --restart vsphere-ui       

Additional Information

Impact/Risks:
Requires restart  of vSphere Client.