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Errors

Kafka error runbooks: fix first, harden after

Each runbook covers one Kafka error: the exact exception text, what the broker is actually telling you, the fix ranked by likelihood, and the durability step to take before you loosen any guardrail mid-incident.

Runbooks

NotEnoughReplicasException

Producers rejected because the ISR shrank below min.insync.replicas — find the partitions, restore the replicas, and know what not to loosen mid-incident.

InvalidReplicationFactorException

Topic creation asked for more replicas than there are live brokers — the single-broker defaults, KRaft fencing, and restore-time causes, each with its fix.

From the documentation

Common backup errors

Connection, storage, restore, and offset errors from the backup tool itself.

Debug mode

Verbose logging when the error message alone is not enough.

Configuration reference

Every backup and restore option in one place.

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