Tag: Kafka

When a NGINX upstream becomes unreachable or its DNS entry disappears, NGINX requests begin to fail.

When the configured replication factor for a Kafka topic is greater than the actual number of brokers in the cluster, Kafka repeatedly fails to assign partitions and logs replication-related errors. This results in persistent warnings or an `InvalidReplicationFactorException` when the broker tries to create internal or user-defined topics.

Critical Kafka cluster degradation detected: Multiple partitions have lost replicas due to broker failure,resulting in an under-replicated state. This pattern indicates a broker has become unavailable, causingpartition leadership changes and In-Sync Replica (ISR) shrinkage across multiple topics.