PASSEDcache / service_crash

Varnish 7.5 Process Crashed — Segmentation Fault on Oracle Linux 9

The Varnish 7.5 process crashed with a segmentation fault. Service is down and not auto-restarting. All dependent connections failing.

Pattern

PROCESS_CRASH_LOOP

Severity

HIGH

Confidence

72%

Remediation

Auto-Heal

Test Results

Metric	Expected	Actual
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

Oracle Linux 9. Varnish 7.5 running on default config. Process PID 22076 received SIGSEGV. Service not configured for auto-restart. 168 users/connections affected.

Injected Error Messages (1)

varnishd process segfault crash loop on Oracle Linux 9 — signal 11 (SIGSEGV), core dump at /var/crash/varnishd.core, service down, port 6081 connection refused, 168 users/connections 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: cmnhnorwy00g7lig7860nk31t