Traceflow Operations Failing with "Traceflow Request Timeout" in NSX-T
Article ID: 409592
Updated On:
Products
Issue/Introduction
In NSX-T, customers may encounter a scenario where traceflow operations consistently fail with the error message:
“Traceflow request timeout. Please retry.”
This issue can occur even when the two VMs involved are on the same host and segment.
Environment
VMware NSX-T Data Center
Cause
The failure occurs due to cache overflow on the NSX-T Managers, likely caused by prolonged uptime.
Evidence for this includes:
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Notification: "Traceflow result was dropped because of cache overflow."
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Browser repeatedly sending the same query during debug sessions.
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NSX-T Managers had uptime exceeding 340 days, indicating a possible accumulation of cached data or stale states.
Resolution
Perform a rolling reboot of the NSX-T Managers.
After the reboot, traceflow operations completed successfully, confirming that clearing the manager cache and resetting its operational state resolved the issue.
Additional Information
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