ECC memory errors
Memory controller reported one or more uncorrectable ECC errors. Data corruption has occurred; the DIMM is failing. Replace immediately.
Remediation
When this rule fires on one of your servers, the dashboard alert detail page renders the full remediation guidance: the command to run, what to verify after, and Furnace's annotation for your specific distro + hardware. Sign in at app.glassmkr.com to see the live alert.