vCenter UI shows error "No healthy upstream", due to memory contention
Article ID: 416676
Updated On:
Products
Issue/Introduction
vCenter UI shows 'no healthy upstream' message as shown below, post login with SSO or domain credentials. This error message is generic as its occurrence is for multiple reasons, however, in this case, the services fails to start or leads to 'no healthy upstream' when the ESXi host which has vCenter server registered, runs out of memory.
Apart from the vCenter UI message, following symptoms exhibit the behavior of resource contention;
- Restarting the services always stops at vmware-sps.
- Services that have started, fails to write logs.
- Command execution is extremely slow.
- vCenter server does not experience storage contention.
- vCenter server does not experience log disk exhaustion or root partition full situation.
- This issue isn't observed when DRS is enabled.
Environment
vCenter Server
Cause
This issue occurs when ESXi host has insufficient system memory.
Resolution
vCenter server requires specified amount of CPU and memory resources as per its deployment size. For information, please refer to Hardware Requirements for the vCenter Server Appliance
Accordingly, please free up system memory by either powering off virtual machine or migrating to another ESXi host. Once, sufficient system memory is available, restart vCenter server virtual machine or restart vCenter server services.
Additional Information
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