Node Liveness Issues#

Every node must renew its liveness record every 4.5 seconds. Failure to renew marks the node suspect, then dead, triggering re-replication of its ranges.

cockroach node status --insecure --host=localhost:26257

Look at is_live. If a node shows false, check in order:

Process crashed. Check cockroach-data/logs/ for fatal or panic entries. OOM kills are the most common cause – check dmesg | grep -i oom on the host.

Network partition. The node runs but cannot reach peers. If cockroach node status succeeds locally but fails from other nodes, the problem is network-level (firewalls, security groups, DNS).