devendra tagare created KAFKA-1789:
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             Summary: Issue with Async producer
                 Key: KAFKA-1789
                 URL: https://issues.apache.org/jira/browse/KAFKA-1789
             Project: Kafka
          Issue Type: Bug
    Affects Versions: 0.8.1, 0.8.0
            Reporter: devendra tagare


Hi,

We are using an async producer to send data to a kafka cluster.The event rate 
at peak is around 250 events/second of size 25KB each.

In the producer code base we have added specific debug statements to capture 
the time taken to create a producer,create a keyed message with a byte payload 
& send the message.

We have added the below properties to the producerConfig

queue.enqueue.timeout.ms=20
send.buffer.bytes=1024000
topic.metadata.refresh.interval.ms=30000

Based on the documentation, producer.send() queues the message on the async 
producer's queue.

So, ideally if the queue is full then the enqueue operation should result in an 
kafka.common.QueueFullException in 20 ms.

The logs indicate that the enqueue operation is taking more than 20ms (takes 
around 250ms) without throwing any exceptions.

Is there any other property that could conflict with queue.enqueue.timeout.ms 
which is causing this behavior ?

Or is it possible that the queue is not full & yet the producer.send() call is 
still taking around 200ms under peak load ?

Also, could you suggest any other alternatives so that we can either enforce a 
timeout or throw an exception in-case the async producer is taking more than a 
specified amount of time.

Regards,
Dev



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