RHEL 7 – journalctl Flooded by rsyslog Looping Messages

📖 ~1 min read

Table of contents

1. Symptom & Impact
2. Environment & Reproduction
3. Root Cause Analysis
4. Quick Triage
5. Step-by-Step Diagnosis
6. Solution – Primary Fix
7. Solution – Alternative Approaches
8. Verification & Acceptance Criteria
9. Rollback Plan
10. Prevention & Hardening
11. Related Errors & Cross-Refs
12. References & Further Reading

Symptom & Impact

Disk usage grows quickly and useful troubleshooting data is buried by repeated log lines.

Environment & Reproduction

Appears after incorrect rsyslog forwarding rules or recursive local logging directives.

Root Cause Analysis

Log message loop routes events back into source input repeatedly without rate limiting.

Quick Triage

Inspect journalctl rate spikes and check systemctl status rsyslog for warning patterns.

Step-by-Step Diagnosis

Validate rsyslog include files and forwarding targets for duplicate or recursive actions.

Solution – Primary Fix

Correct rsyslog rules, restart rsyslog service, and verify journal growth returns to normal.

Solution – Alternative Approaches

Enable conservative rate limiting to reduce impact while full config remediation is reviewed.

Verification & Acceptance Criteria

journalctl volume drops to expected levels and important service logs are visible.

Rollback Plan

Reapply previous rsyslog config backup if new rules miss required forwarding paths.

Prevention & Hardening

Lint rsyslog config in CI and enforce change approvals for logging pipeline updates.

Related Errors & Cross-Refs

imjournal state repeated, forwarding loop detected, excessive duplicate messages.

Related tutorial: View the step-by-step tutorial for rhel-7.

View all rhel-7 tutorials on the Tutorials Hub →

Browse all common problems & solutions on the Tutorials Hub.

References & Further Reading

RHEL 7 logging architecture, rsyslog configuration, and journalctl troubleshooting.