Odin Standal created KAFKA-6817:
-----------------------------------

             Summary: UnknownProducerIdException when writing messages with old 
timestamps
                 Key: KAFKA-6817
                 URL: https://issues.apache.org/jira/browse/KAFKA-6817
             Project: Kafka
          Issue Type: Bug
          Components: producer 
    Affects Versions: 1.1.0
            Reporter: Odin Standal


We are seeing the following exception in our Kafka application:
{code:java}
ERROR o.a.k.s.p.internals.StreamTask - task [0_0] Failed to close producer due 
to the following error: org.apache.kafka.streams.errors.StreamsException: task 
[0_0] Abort sending since an error caught with a previous record (key 222222 
value some-value timestamp 1519200902670) to topic exactly-once-test-topic- v2 
due to This exception is raised by the broker if it could not locate the 
producer metadata associated with the producerId in question. This could happen 
if, for instance, the producer's records were deleted because their retention 
time had elapsed. Once the last records of the producerId are removed, the 
producer's metadata is removed from the broker, and future appends by the 
producer will return this exception. at 
org.apache.kafka.streams.processor.internals.RecordCollectorImpl.recordSendError(RecordCollectorImpl.java:125)
 at 
org.apache.kafka.streams.processor.internals.RecordCollectorImpl.access$500(RecordCollectorImpl.java:48)
 at 
org.apache.kafka.streams.processor.internals.RecordCollectorImpl$1.onCompletion(RecordCollectorImpl.java:180)
 at 
org.apache.kafka.clients.producer.KafkaProducer$InterceptorCallback.onCompletion(KafkaProducer.java:1199)
 at 
org.apache.kafka.clients.producer.internals.ProducerBatch.completeFutureAndFireCallbacks(ProducerBatch.java:204)
 at 
org.apache.kafka.clients.producer.internals.ProducerBatch.done(ProducerBatch.java:187)
 at 
org.apache.kafka.clients.producer.internals.Sender.failBatch(Sender.java:627) 
at 
org.apache.kafka.clients.producer.internals.Sender.failBatch(Sender.java:596) 
at 
org.apache.kafka.clients.producer.internals.Sender.completeBatch(Sender.java:557)
 at 
org.apache.kafka.clients.producer.internals.Sender.handleProduceResponse(Sender.java:481)
 at 
org.apache.kafka.clients.producer.internals.Sender.access$100(Sender.java:74) 
at 
org.apache.kafka.clients.producer.internals.Sender$1.onComplete(Sender.java:692)
 at org.apache.kafka.clients.ClientResponse.onComplete(ClientResponse.java:101) 
at 
org.apache.kafka.clients.NetworkClient.completeResponses(NetworkClient.java:482)
 at org.apache.kafka.clients.NetworkClient.poll(NetworkClient.java:474) at 
org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:239) at 
org.apache.kafka.clients.producer.internals.Sender.run(Sender.java:163) at 
java.lang.Thread.run(Thread.java:748) Caused by: 
org.apache.kafka.common.errors.UnknownProducerIdException

{code}
We discovered this error when we had the need to reprocess old messages.

We have reproduced the error with a smaller example application. The error 
occurs after 10 minutes of producing messages that have old timestamps (type 1 
year old). The topic we are writing to have a retention.ms set to 1 year so we 
are expecting the messages to stay there.

After digging through the ProducerStateManager-code in the Kafka source code we 
have a theory of what might be wrong.

The ProducerStateManager.removeExpiredProducers() seems to remove producers 
from memory erroneously when processing records which are older than the 
maxProducerIdExpirationMs (coming from the `transactional.id.expiration.ms` 
configuration), which is set by default to 7 days. 

 



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