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PASSEDcache / service_crash
Varnish 7.5 Service Stopped — Exit Code 1 on Amazon Linux 2023
The Varnish 7.5 service exited with code 1 due to a configuration error introduced in the last update. Service will not start until config is fixed.
Pattern
PROCESS_CRASH_LOOP
Severity
HIGH
Confidence
72%
Remediation
Auto-Heal
Test Results
| Metric | Expected | Actual | Result |
|---|---|---|---|
| Pattern Recognition | PROCESS_CRASH_LOOP | PROCESS_CRASH_LOOP | |
| Severity Assessment | HIGH | HIGH | |
| Incident Correlation | N/A | None | |
| Cascade Escalation | N/A | No | |
| Remediation | — | Auto-Heal — Corax resolves autonomously |
Scenario Conditions
Amazon Linux 2023. Varnish 7.5 config file has syntax error after update. Service entered failed state. systemd status: failed. 132 users/connections users impacted.
Injected Error Messages (1)
varnishd crash loop on Amazon Linux 2023 — service restart fail with exit code 1, configuration error in /etc/varnishd/varnishd.conf, systemd restart loop detected, port 6081 connection refused, 132 users/connections dependent services affected
Neural Engine Root Cause Analysis
Process crash loop detected — a service is repeatedly crashing and restarting, failing to reach a stable running state. This indicates a persistent issue such as a missing dependency, corrupted configuration, incompatible library version, memory corruption, or an unhandled exception that occurs during startup. In Kubernetes environments, this manifests as CrashLoopBackOff with exponentially increasing restart delays.
Remediation Plan
1. Check service logs immediately before each crash for the error message or stack trace.
2. Look for core dumps in /var/crash/ or the configured core dump location.
3. Verify all dependencies (config files, environment variables, database connectivity) are available.
4. Roll back to the last known working version if the crash started after a deployment.
5. For segfaults, check for library version mismatches or corrupted binaries — reinstall the package.
Tested: 2026-04-02Monitors: 1 | Incidents: 1Test ID: cmnhnox9v010glig7lax1y5dx