问题描述
在Spring Boot应用中集成Event Hub，发送消息时指定Partition Key，日志中发现异常：
应用使用Event Hub版本为
<dependency> <groupId>com.azure.spring</groupId> <artifactId>azure-spring-cloud-stream-binder-eventhubs</artifactId> <version>2.5.0</version> </dependency>
发送消息指定Partition Key
@RestController public class ReactiveEventProducerController { private static final Logger LOGGER = LoggerFactory.getLogger(ReactiveEventProducerController.class); @Autowired private Sinks.Many<Message<String>> many; @PostMapping("/messages/reactive") public ResponseEntity<String> reactiveSendMessage(@RequestParam String message) { LOGGER.info("Reactive method to send message: {} to destination.", message); many.emitNext(MessageBuilder.withPayload(message).setHeaderIfAbsent(EventHubHeaders.PARTITION_KEY, String.valueOf(vin.hashCode())).build(), Sinks.EmitFailureHandler.FAIL_FAST); return ResponseEntity.ok(message); } @GetMapping("/") public String welcome() { return "welcome"; } }
异常消息
{"@timestamp":"2022-04-05 13:15:08.643","level":"WARN","host":"bogon","APP":"myehapp","microservice":"ehcenter", "class":"com.azure.spring.integration.eventhub.converter.EventHubMessageConverter","trackingID":"","spanID":"", "data":"System property azure_partition_key(1916947495) is not allowed to be defined and will be ignored.","xcptn":""}
问题解答
经过多次测试验证，这个异常消息只是一个Warning（警告），并不影响真正消息的发送。 可以使用Service Bus Explorer( https://github.com/paolosalvatori/ServiceBusExplorer )工具进行查看发送端发送的消息。此外，在消费数据的时候，加上EventHubHeaders.RAW_PARTITION_ID 就可以查看分区情况。
message.getHeaders().get(EventHubHeaders.RAW_PARTITION_ID))
