App Metrics Not Showing Logs Due to cache-max-memory-size exceeded Error

Products

• VMware Tanzu Application Service

Issue/Introduction

Application logs are visible in Apps Manager but do not appear in App Metrics.
The following error is observed in log-store.stderr.log:

{"level":"error","timestamp":"2025-12-31T04:00:23.107626279Z","caller":"persistence/store.go:85","message":"couldn't write logs to adapter","id":16,"error":"engine: cache-max-memory-size exceeded: (1073833157/1073741824)"}

Environment

App Metrics

Cause

The log-store in-memory cache has reached its maximum size and cannot persist new logs to the backend store. As a result, App Metrics cannot retrieve or display logs, even though live logs may still be visible in Apps Manager.

Resolution

When the engine: cache-max-memory-size exceeded error is present, restart the log-store job on nodes reporting this error to clear the in-memory cache.
After restarting the log-store job on the affected nodes, confirm that the error no longer appears and that new logs are visible in App Metrics again.