Kafka notifier: do not wait until timeout when there is no backlog to process, ie. no message in the partition queue
Kafka notifier: do not wait until timeout when there is no backlog to process, ie. no message in the partition queue

raintank/metrictank,raintank/metrictank,raintank/metrictank,replay/metrictank,replay/metrictank,raintank/raintank-metric,replay/metrictank,replay/metrictank,raintank/raintank-metric,raintank/metrictank,raintank/raintank-metric