spring-kafka - Gopi Gorantala

Kafka TransactionalIdAuthorizationException: Fix the ACL

TransactionalIdAuthorizationException: Transactional Id authorization failed. Why your EOS/Spring transactional producer dies on a secured cluster and the exact ACLs that fix it.

Kafka TopicAuthorizationException: Not Authorized to Access Topics — Fix

Hitting TopicAuthorizationException: Not authorized to access topics in Kafka? Here's why ACLs deny you, how principals really resolve, and the exact fix.

Kafka InstanceAlreadyExistsException: AppInfo Mbean Fix

Kafka logs 'Error registering AppInfo mbean javax.management.InstanceAlreadyExistsException'. Here's what a duplicate client.id really breaks and how to fix it.

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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: Subscription to Topics, Partitions and Pattern Are Mutually Exclusive

Kafka throws IllegalStateException: Subscription to topics, partitions and pattern are mutually exclusive when you mix subscribe() and assign(). Here's the fix.

Kafka InitProducerId Timeout: Why It Hangs and the Fix

Kafka producer throws 'Timeout expired after 60000ms while awaiting InitProducerId' and initTransactions() hangs on startup. Here's the real root cause 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 UnknownMemberIdException: Why It Happens and How to Fix It

Kafka UnknownMemberIdException — 'The coordinator is not aware of this member' (code 25). Learn the three triggers, the memberId lifecycle, and the exact fix.

Kafka OffsetOutOfRangeException: auto.offset.reset Explained

Fix OffsetOutOfRangeException and NoOffsetForPartitionException in Kafka: why committed offsets vanish, what auto.offset.reset really does, and safe resets.

Kafka TopicExistsException: Why It Happens and How to Fix It

Kafka TopicExistsException: Topic 'X' already exists. Why AdminClient, Spring KafkaAdmin, and kafka-topics.sh throw it, and how to handle it idempotently.