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-errors
60 PostsKafka 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 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.
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 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 Timeout Before Position for Partition Could Be Determined
Kafka consumer failing with TimeoutException: Timeout of 60000ms expired before the position for partition could be determined? Here's the fix.
Kafka: Timed out waiting for a node assignment — Fix
Kafka AdminClient and kafka-topics.sh fail with 'Timed out waiting for a node assignment. Call: createTopics'. Here's why it happens and the exact fix.
Kafka: Connection Terminated During Authentication — Fix
Kafka AuthenticationException 'terminated during authentication' with its three-reason hint decoded: security.protocol mismatch, TLS/firewall, and mTLS. Repro plus 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 Streams TaskCorruptedException: Fix and Prevent It
Kafka Streams TaskCorruptedException wipes local state and re-restores from the changelog. Here's why it fires under EOS, how to fix it, and how to stop it.