mirror of https://github.com/apache/kafka.git
8ed53a15ee
The Kafka consumer makes a variety of requests to brokers such as fetching committed offsets and updating metadata. In the LegacyKafkaConsumer, the approach is typically to prepare RPC requests and then poll the network to wait for responses. In the AsyncKafkaConsumer, the approach is to enqueue an ApplicationEvent for processing by one of the request managers on the background thread. However, it is still important to wait for responses rather than spinning enqueuing events for the request managers before they have had a chance to respond. In general, the behaviour will not be changed by this code. The PlaintextConsumerTest.testSeek test was flaky because operations such as KafkaConsumer.position were not properly waiting for a response which meant that subsequent operations were being attempted in the wrong state. This test is no longer flaky. Reviewers: Kirk True <ktrue@confluent.io>, Lianet Magrans <lianetmr@gmail.com>, Bruno Cadonna <cadonna@apache.org> |
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