kafka-producer - Gopi Gorantala

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Kafka TimeoutException: Expiring N record(s) — Cause and Fix

Kafka producer failing with TimeoutException: Expiring N record(s): ms has passed since batch creation? What delivery.timeout.ms really does — and the fix.

Kafka LEADER_NOT_AVAILABLE: Why It Happens and How to Fix It

Kafka LEADER_NOT_AVAILABLE floods your producer logs the moment you write to a fresh topic. Here's the exact cause, the reproduction, and the real fix.

Kafka NotLeaderOrFollowerException: Cause and Fix

Producer or consumer failing with NotLeaderOrFollowerException (NOT_LEADER_OR_FOLLOWER)? Why stale leader metadata causes it and how to fix it for good.

Kafka InvalidTxnStateException: Causes and How to Fix It

InvalidTxnStateException means your producer called a transactional API in the wrong state. Here's the state machine, the exact triggers, and the fix.

Kafka NotEnoughReplicasException: Fix NOT_ENOUGH_REPLICAS Errors

Kafka NotEnoughReplicasException: messages rejected since there are fewer in-sync replicas than required. Fix min.insync.replicas vs acks=all, fast.

Kafka SerializationException: Can't Convert Value of Class Fix

Kafka SerializationException: Can't convert value of class X to StringSerializer? The ClassCastException behind it, the config fix, and the safer design.

Kafka: Cannot Perform Operation After Producer Closed

Kafka IllegalStateException 'Cannot perform operation after producer has been closed' explained: why it happens, the Spring share

Kafka BufferExhaustedException: Fix Failed to Allocate Memory

Kafka producer throws BufferExhaustedException: failed to allocate memory within max blocking time? Here's why buffer.memory fills up and the exact fix.

Kafka ProducerFencedException: Why It Happens and How to Fix It

ProducerFencedException: there is a newer producer with the same transactionalId. What fences a Kafka transactional producer and the exact fix, explained.

Kafka NetworkException: The Server Disconnected — How to Fix It

Fix org.apache.kafka.common.errors.NetworkException: the server disconnected before a response was received. Root causes, idempotent retries, LB timeouts.