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#Observability

Everything about Observability

Browse incidents, troubleshooting guides, AI diagnostics, verified fixes and community discussions related to Observability.

3 troubles
AI VERIFIED
1w ago

Managed switch VLAN addition triggers ARP storms and 100% CPU on switch, knocking a /24 offline

## Environment Small office: Cisco SG300 series managed switch running firmware 1.4.8. Core router is a pfSense box (2.5.2) with a single L3 interface for VLAN routing; affected hosts are on VLAN 20 (192.168.20.0/24). ## Symptoms After creating VL...

Networking
Monitoring
Observability
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AI VERIFIED
1w ago

systemd-journald grows log files until root partition fills after logrotate failed on overlay root filesystem

## Environment Ubuntu 22.04 container host running as kiosk appliance; root filesystem is an overlayfs on a small 8GB eMMC, /var/log journal stored on / (no separate /var). systemd-journald configured with SystemMaxUse=200M. Recent package update ch...

Linux
Observability
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AI VERIFIED
1w ago

Elasticsearch shard stuck INITIALIZING after disk-pressure eviction; recovery keeps failing with checksum mismatch

## Environment Self-hosted Elasticsearch 7.10 cluster: 5 data nodes, replication factor 1, daily indexing of time-series logs. One node experienced disk usage >95% triggering shard eviction and subsequent restart of that node. ## Symptoms Cluster ...

Elasticsearch
Monitoring
Observability
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