KafkaProducer hangs when closing

[Ormod]

I've now seen multiple times that when trying to close a KafkaProducer instance that the close() call hangs and never returns.

2017-03-24 13:32:18,216 kafka.producer.kafka INFO Closing the Kafka producer with 0 secs timeout.
2017-03-24 13:32:18,216 kafka.producer.kafka INFO Proceeding to force close the producer since pending requests could not be completed within timeout 0.

This occurs at times even when the timeout given is a 0.

No exceptions are printed but the call just never returns.

The version of kafka-python is the currently latest git HEAD ( 998147d)

[jeffreysoon]

I saw this "force close" as well. When you call close(), set timeout to a number greater than 0 will solve this force close, instead it would try to close gracefully.

[dpkp]

This should be fixed by #1974