kafka-errors - GopiGorantala — Java, Spring, Kafka, Flink, Distributed systems (Page 5)

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.

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 InconsistentGroupProtocolException: Cause and Fix

Kafka InconsistentGroupProtocolException: the group member's supported protocols are incompatible. Why it hits mid-upgrade and how to fix the assignor mismatch.

Kafka InconsistentClusterIdException: Cluster ID Mismatch Fix

Fix kafka.common.InconsistentClusterIdException: Cluster ID doesn't match stored clusterId in meta.properties — the Docker volume cause and the real fix.

Kafka FETCH_SESSION_ID_NOT_FOUND: Causes and Fix

Kafka logs spamming FETCH_SESSION_ID_NOT_FOUND or INVALID_FETCH_SESSION_EPOCH? Here's what the fetch session cache is doing and how to stop the noise.

Kafka FencedInstanceIdException: Fix Static Membership Collisions

FencedInstanceIdException means two live consumers share one group.instance.id. Here's why the broker fences the old one, and how to fix it for good.

Kafka "Failed to construct kafka consumer": Every Cause, Fixed

KafkaException: Failed to construct kafka consumer — how to triage every common cause (deserializer class, classpath, DNS, JAAS, SSL) and fix each one fast.

Kafka Failed to Acquire Lock on File .lock: How to Fix It

Kafka broker won't start: 'Failed to acquire lock on file .lock ... A Kafka instance in another process is using this directory.' Why it happens and how to fix it.

Kafka CorruptRecordException: Record Is Corrupt — Fix It

Kafka CorruptRecordException: Record is corrupt (stored crc != computed crc). Why the CRC check fails, how to recover the partition, and how to stop it recurring.

Kafka: Consumer Is Not Subscribed to Any Topics — Fix

IllegalStateException: Consumer is not subscribed to any topics or assigned any partitions — why poll() throws it, the subscribe/assign contract, and the fix.