coordination
Heartbeat Monitor
Nodes send periodic heartbeats every 1s. Missing heartbeats for 3s marks a node as dead.
alive nodes3/3
paused nodes0
timeout threshold3s
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Node-A
sending heartbeats
last: 0s ago
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Node-B
sending heartbeats
last: 0s ago
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Node-C
sending heartbeats
last: 0s ago
Click a node to pause/resume heartbeats
// event log
No events yet
How It Works
- Nodes send periodic heartbeat messages
- Monitor tracks last heartbeat timestamp
- If no heartbeat within timeout window → dead
- Used for failure detection in distributed systems
Use Cases
- Cluster membership (Cassandra, Kafka)
- Health checking (Consul, etcd)
- Session management
- Load balancer health probes