Kafka Stream:正常关闭 [英] Kafka Stream: Graceful shutdown

问题描述

如果我们在后台启动KafkaStream应用程序(例如Linux)，是否有一种方法可以从外部向应用程序发出信号，从而启动正常关机?

If we start the KafkaStream app in the background (say Linux), is there a way to signal from external, to the app, that can initiate the graceful shutdown?

推荐答案

如文档中所述(

As describe in the docs (https://kafka.apache.org/11/documentation/streams/tutorial), it's recommended to register a shutdown hook that calls KafkaStreams#close() for a clean shutdown:

final CountDownLatch latch = new CountDownLatch(1);

// attach shutdown handler to catch control-c
Runtime.getRuntime().addShutdownHook(new Thread("streams-shutdown-hook") {
    @Override
    public void run() {
        streams.close();
        latch.countDown();
    }
});

try {
    streams.start();
    latch.await();
} catch (Throwable e) {
    System.exit(1);
}
System.exit(0);

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