Kafka Connect Task Threw an Uncaught and Unrecoverable Exception
Kafka Connect task killed with 'uncaught and unrecoverable exception'? It's usually a converter poison pill. Here's the DataException root cause, DLQ fix, and design.
event-streaming
29 PostsKafka Connect Failed to Flush: Offset Commit Timeout Fix
Kafka Connect source task logs 'Failed to flush, timed out while waiting for producer to flush outstanding N messages'. Here's the real cause and the fix.
Kafka Connect: Failed to Find Any Class That Implements Connector
Kafka Connect throws 'Failed to find any class that implements Connector' when plugin.path is wrong or classloader isolation hides your JAR. Here's the fix.
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: 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.
Kafka NotControllerException: Why It Happens and How to Fix It
Kafka throws NotControllerException (code 41) when an admin request hits a broker that isn't the active controller. Here's the mechanism and the real fix.
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 RecordTooLargeException: The 1MB Limit and How to Fix It
Hitting RecordTooLargeException in Kafka? Learn why the 1MB default bites on both producer and broker, and the exact configs to fix it properly.
Kafka ListenerNotFoundException: No Matching Listener Fix
Kafka ListenerNotFoundException and 'leader brokers without a matching listener' explained: why the leader lacks the listener, how to reproduce, and the fix.