Question

我的目标是在RabbitMq发送者和使用者之间维持traceId中的brave.Span。为了实现这一点，我使用在2.1.0.RELEASE版本中自动配置的spring-cloud-sleuth。

创建跨度并最终通过RabbitTemplate向代理发送消息并在同一（测试）应用程序中接收消息时，我希望spring-cloud-sleuth可以在发送方和发送方之间维持traceId消费者。

我的观察是，当通过RabbitMq发送消息时，traceId没有正确地附加到消息的标题中。确实有一个traceId / context附加并提交了，但是它是一个新的，与我在创建跨度时看到的（见下面的代码）不同。在消费者上，新创建（但不相关）的traceId随后会被正确处理，并可以从Tracer中读取。

@Test
public void messaging_ShouldPreserveTraceId() {
        final Span spanProbe = tracer.newTrace().name("TraceIT").start();
        spanProbe.start();

        final String traceIdBefore = spanProbe.context().traceIdString();
        log.info("TRACE CONTEXT BEFORE: " + spanProbe.context());
        log.info("TRACE ID BEFORE: " + traceIdBefore);
        log.info("TRACE ID BEFORE Parent: " + spanProbe.context().parentIdString());

        // send - the actual rabbitTemplate Call (in the producer) happens in the same (main) thread
        try{
            producer.sendAsString(ROUTING_KEY, "CONTENT");
        }finally {
            spanProbe.finish();
        }
        // consume
        Awaitility.await().atMost(TEN_MINUTES).until(() -> {
            assertThat(consumer.spans(), hasSize(1));
        });

        // assert
        final Span consumerSpan = consumer.spans().get(0);
        final String traceIdAfter = consumerSpan.context().traceIdString();

        log.info("TRACE CONTEXT AFTER: " + consumerSpan.context());
        log.info("TRACE ID AFTER: " + traceIdAfter);

        assertEquals(traceIdAfter, traceIdBefore);

    }

consumer（测试类字段）为：

 static class TraceTestListener implements MessageListener {

        private final List<Span> spans = new ArrayList<>();

        @Autowired
        private Tracing tracing;

        @Override
        public void onMessage(Message message) {
            log.info("---> Received MESSAGE: {}", message);
            spans.add(tracing.tracer().currentSpan());
        }

        public List<Span> spans() {
            return spans;
        }
    }

 [main      ] sl.euth.debug.boot.rabbit.trace.TraceIT.messaging_ShouldPreserveTraceId(114) - TRACE CONTEXT BEFORE: 23ca5b3b9f068716/23ca5b3b9f068716
 [main      ] sl.euth.debug.boot.rabbit.trace.TraceIT.messaging_ShouldPreserveTraceId(115) - TRACE ID BEFORE: 23ca5b3b9f068716
 [main      ] sl.euth.debug.boot.rabbit.trace.TraceIT.messaging_ShouldPreserveTraceId(116) - TRACE ID BEFORE Parent: null
 [Rabbit-4  ] org.springframework.amqp.rabbit.listener.BlockingQueueConsumer$InternalConsumer.handleDelivery(897) - Storing delivery for consumerTag: 'amq.ctag-HnuJEiuRHAHTYfzypJDW6w' with deliveryTag: '1' in Consumer@6c27e700: tags=[[amq.ctag-HnuJEiuRHAHTYfzypJDW6w]], channel=Cached Rabbit Channel: AMQChannel(amqp://asdasdaa@35.243.142.228:5672/asdasdaa,2), conn: Proxy@33ebe4f0 Shared Rabbit Connection: SimpleConnection@3a88f6fb [delegate=amqp://asdasdaa@35.243.142.228:5672/asdasdaa, localPort= 58539], acknowledgeMode=AUTO local queue size=0

// Please mind how in the received message's headers a different traceId is present

 [test_rabbitConsumer1] org.springframework.amqp.rabbit.listener.BlockingQueueConsumer.handle(469) - Received message: (Body:'[B@1989ac6d(byte[7])' MessageProperties [headers={X-B3-SpanId=b335bbaf06a08879, X-B3-Sampled=0, X-B3-TraceId=b335bbaf06a08879}, timestamp=Tue May 21 13:44:57 CEST 2019, contentType=text/plain; charset=utf-8, contentLength=0, receivedDeliveryMode=PERSISTENT, priority=0, redelivered=false, receivedExchange=test-exchange, receivedRoutingKey=test-routing, deliveryTag=1, consumerTag=amq.ctag-HnuJEiuRHAHTYfzypJDW6w, consumerQueue=test-queue])
 [test_rabbitConsumer1] org.springframework.cloud.sleuth.log.Slf4jScopeDecorator.log(180) - Starting scope for span: b335bbaf06a08879/46a25dd87dc63878
 [test_rabbitConsumer1] org.springframework.cloud.sleuth.log.Slf4jScopeDecorator.decorateScope(102) - With parent: 4663306299116113188
 [test_rabbitConsumer1] sl.euth.debug.boot.rabbit.trace.TraceIT$TraceTestListener.onMessage(150) - ---> Received MESSAGE: (Body:'[B@1989ac6d(byte[7])' MessageProperties [headers={}, timestamp=Tue May 21 13:44:57 CEST 2019, contentType=text/plain; charset=utf-8, contentLength=0, receivedDeliveryMode=PERSISTENT, priority=0, redelivered=false, receivedExchange=test-exchange, receivedRoutingKey=test-routing, deliveryTag=1, consumerTag=amq.ctag-HnuJEiuRHAHTYfzypJDW6w, consumerQueue=test-queue])
 [test_rabbitConsumer1] org.springframework.cloud.sleuth.log.Slf4jScopeDecorator.log(180) - Closing scope for span: b335bbaf06a08879/46a25dd87dc63878
 [main      ] sl.euth.debug.boot.rabbit.trace.TraceIT.messaging_ShouldPreserveTraceId(133) - TRACE CONTEXT AFTER: b335bbaf06a08879/46a25dd87dc63878

// Here we would expect the traceId to be 23ca5b3b9f068716
 [main      ] sl.euth.debug.boot.rabbit.trace.TraceIT.messaging_ShouldPreserveTraceId(134) - TRACE ID AFTER: b335bbaf06a08879
 [main      ] sl.euth.debug.commons.lib.test.junit.rules.LoggingRule$1.evaluate(77) - Finished test messaging_ShouldPreserveTraceId(sl.euth.debug.boot.rabbit.trace.TraceIT) in 13102 ms

Spring Cloud Sleuth Rabbit集成似乎在发送时创建了新的TraceId

0 个答案: