def test_rolling_bounces_will_not_trigger_rebalance_under_static_membership(
self):
self.zookeeper.start()
self.kafka.start()
numThreads = 3
processor1 = StaticMemberTestService(self.test_context, self.kafka,
"consumer-A", numThreads)
processor2 = StaticMemberTestService(self.test_context, self.kafka,
"consumer-B", numThreads)
processor3 = StaticMemberTestService(self.test_context, self.kafka,
"consumer-C", numThreads)
processors = [processor1, processor2, processor3]
self.producer.start()
for processor in processors:
processor.CLEAN_NODE_ENABLED = False
self.set_topics(processor)
verify_running(processor, self.running_message)
self.verify_processing(processors)
# do several rolling bounces
num_bounces = 3
for i in range(0, num_bounces):
for processor in processors:
verify_stopped(processor, self.stopped_message)
verify_running(processor, self.running_message)
stable_generation = -1
for processor in processors:
generations = extract_generation_from_logs(processor)
num_bounce_generations = num_bounces * numThreads
assert num_bounce_generations <= len(generations), \
"Smaller than minimum expected %d generation messages, actual %d" % (num_bounce_generations, len(generations))
for generation in generations[-num_bounce_generations:]:
generation = extract_generation_id(generation)
if stable_generation == -1:
stable_generation = generation
assert stable_generation == generation, \
"Stream rolling bounce have caused unexpected generation bump %d" % generation
self.verify_processing(processors)
stop_processors(processors, self.stopped_message)
self.producer.stop()
self.kafka.stop()
self.zookeeper.stop()
def extract_highest_generation(self, found_generations):
return extract_generation_id(found_generations[-1])