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PASSEDcache / config_syntax
Varnish 7.5 Config Syntax Error — Service Won't Reload on Oracle Linux 9
A configuration change introduced a syntax error in Varnish 7.5's config file. Service reload fails, running on stale config. New changes not applied.
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 | MEDIUM | HIGH | |
| Incident Correlation | N/A | None | |
| Cascade Escalation | N/A | No | |
| Remediation | — | Auto-Heal — Corax resolves autonomously |
Scenario Conditions
Oracle Linux 9. Varnish 7.5 config file edited with syntax error on line 31. Reload/restart fails with parse error. Service running stale config if it was already up.
Injected Error Messages (1)
Varnish 7.5 crash loop on Oracle Linux 9 — config syntax error line 31, service restart fail: 'parse error near unexpected token', varnishd in restart loop, connection refused on port 6081
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.
Improvements Applied
- Severity: HIGH (expected MEDIUM)
Tested: 2026-04-02Monitors: 1 | Incidents: 1Test ID: cmnhnr7w3097zlig76onpbtbg