我正在使用Web-flux/Reactive和Webclient，在Tomcat和Spring Boot上运行。
一切都运行良好，但我发现使用Webclient时必须返回或使用响应，否则连接会关闭且未被消耗，会产生很多日志消息，显示“连接过早关闭”。如果出现404状态码错误，我可以使用OnStatus并抛出异常，但我的情况是：当上游服务返回404时，我必须手动返回一个空的mono。因此，我不使用Webclient请求的响应，而是使用.exchange()中的ClientResponse来检查状态并处理。我的初始问题是这些日志消息，它们只是“垃圾”，你不想在日志消息中看到很多它们。我曾经读过如果发生这种情况，连接也无法再次使用，所以听起来非常糟糕，但我不确定……只有在未找到时才会收到此消息，如果响应为200，则会返回对象，且日志消息不会打印。
我尝试使用clientResponse.BodyToMono(Void.Class)，但它也无效。日志消息仍在出现。
@Bean
public WebClient webClient(
@Value("${http.client.connection-timeout-millis}") final int connectionTimeoutMillis,
@Value("${http.client.socket-timeout-millis}") final int socketTimeoutMillis,
@Value("${http.client.wire-tap-enabled}") final boolean wireTapEnabled,
final ObjectMapper objectMapper) {
Consumer<Connection> doOnConnectedConsumer = connection ->
connection
.addHandler(new ReadTimeoutHandler(socketTimeoutMillis, MILLISECONDS))
.addHandler(new WriteTimeoutHandler(connectionTimeoutMillis, MILLISECONDS));
TcpClient tcpClient = TcpClient.newConnection()
.wiretap(wireTapEnabled)
.option(CONNECT_TIMEOUT_MILLIS, connectionTimeoutMillis)
.doOnConnected(doOnConnectedConsumer);
return WebClient.builder()
.clientConnector(new ReactorClientHttpConnector(HttpClient.from(tcpClient).compress(true)))
.exchangeStrategies(customExchangeStrategies(objectMapper))
.build();
}
// ..........
MultiValueMap<String, String> params = getParams(t1, t2);
return webClient.get()
.uri(HttpUtils.buildUrl(serviceUrl, params, name))
.exchange()
.flatMap(this::handleClientResponse)
.onErrorMap(Exception.class, ex -> handleUnexpectedEx(ex, name, params));
}
日志条目
2019-07-08 11:56:51.972 WARN [-,,,] 1504 --- [ctor-http-nio-3] reactor.netty.channel.FluxReceive : [id: 0x66c8568c, L:/127.0.0.1:62319 ! R:localhost/127.0.0.1:8990] An exception has been observed post termination
reactor.netty.http.client.PrematureCloseException: Connection prematurely closed DURING response
2019-07-08 11:56:52.013 DEBUG [-,,,] 1504 --- [ctor-http-nio-2] reactor.netty.ReactorNetty : [id: 0xf50bdf8d, L:/127.0.0.1:62324 ! R:localhost/127.0.0.1:8990] Non Removed handler: ReadTimeoutHandler, context: ChannelHandlerContext(ReadTimeoutHandler, [id: 0xf50bdf8d, L:/127.0.0.1:62324 ! R:localhost/127.0.0.1:8990]), pipeline: DefaultChannelPipeline{(reactor.left.httpCodec = io.netty.handler.codec.http.HttpClientCodec), (reactor.left.decompressor = io.netty.handler.codec.http.HttpContentDecompressor), (WriteTimeoutHandler = io.netty.handler.timeout.WriteTimeoutHandler), (ReadTimeoutHandler = io.netty.handler.timeout.ReadTimeoutHandler), (reactor.right.reactiveBridge = reactor.netty.channel.ChannelOperationsHandler)}
2019-07-08 11:56:52.014 DEBUG [-,,,] 1504 --- [ctor-http-nio-2] reactor.netty.ReactorNetty : [id: 0xf50bdf8d, L:/127.0.0.1:62324 ! R:localhost/127.0.0.1:8990] Non Removed handler: WriteTimeoutHandler, context: ChannelHandlerContext(WriteTimeoutHandler, [id: 0xf50bdf8d, L:/127.0.0.1:62324 ! R:localhost/127.0.0.1:8990]), pipeline: DefaultChannelPipeline{(reactor.left.httpCodec = io.netty.handler.codec.http.HttpClientCodec), (reactor.left.decompressor = io.netty.handler.codec.http.HttpContentDecompressor), (WriteTimeoutHandler = io.netty.handler.timeout.WriteTimeoutHandler), (ReadTimeoutHandler = io.netty.handler.timeout.ReadTimeoutHandler), (reactor.right.reactiveBridge = reactor.netty.channel.ChannelOperationsHandler)}
2019-07-08 11:56:52.014 DEBUG [-,,,] 1504 --- [ctor-http-nio-2] r.netty.resources.NewConnectionProvider : [id: 0xf50bdf8d, L:/127.0.0.1:62324 ! R:localhost/127.0.0.1:8990] onStateChange([response_incomplete], GET{uri=/service/TWFDHF?T1=1.0.0&T2=1, connection=SimpleConnection{channel=[id: 0xf50bdf8d, L:/127.0.0.1:62324 ! R:localhost/127.0.0.1:8990]}})
2019-07-08 11:56:52.014 WARN [-,,,] 1504 --- [ctor-http-nio-2] reactor.netty.channel.FluxReceive : [id: 0xf50bdf8d, L:/127.0.0.1:62324 ! R:localhost/127.0.0.1:8990] An exception has been observed post termination
启用了窃听功能的日志条目
2019-07-10 14:51:19.295 DEBUG [-,,,] 2940 --- [ctor-http-nio-2] reactor.netty.tcp.TcpClient : [id: 0x677da0d4, L:/127.0.0.1:62385 ! R:localhost/127.0.0.1:8990] UNREGISTERED
2019-07-10 14:51:19.541 DEBUG [-,,,] 2940 --- [ctor-http-nio-4] reactor.netty.tcp.TcpClient : [id: 0xa7f41d1e, L:/127.0.0.1:62384 - R:localhost/127.0.0.1:8990] CLOSE
2019-07-10 14:51:19.542 DEBUG [-,,,] 2940 --- [ctor-http-nio-4] r.n.resources.PooledConnectionProvider : [id: 0xa7f41d1e, L:/127.0.0.1:62384 ! R:localhost/127.0.0.1:8990] Channel cleaned, now 0 active connections and 9 inactive connections
2019-07-10 14:51:19.542 DEBUG [-,,,] 2940 --- [ctor-http-nio-4] r.n.resources.PooledConnectionProvider : [id: 0xa7f41d1e, L:/127.0.0.1:62384 ! R:localhost/127.0.0.1:8990] Channel closed, now 0 active connections and 8 inactive connections
2019-07-10 14:51:19.542 DEBUG [-,,,] 2940 --- [ctor-http-nio-4] reactor.netty.ReactorNetty : [id: 0xa7f41d1e, L:/127.0.0.1:62384 ! R:localhost/127.0.0.1:8990] Non Removed handler: ReadTimeoutHandler, context: ChannelHandlerContext(ReadTimeoutHandler, [id: 0xa7f41d1e, L:/127.0.0.1:62384 ! R:localhost/127.0.0.1:8990]), pipeline: DefaultChannelPipeline{(reactor.left.loggingHandler = io.netty.handler.logging.LoggingHandler), (reactor.left.httpCodec = io.netty.handler.codec.http.HttpClientCodec), (WriteTimeoutHandler = io.netty.handler.timeout.WriteTimeoutHandler), (ReadTimeoutHandler = io.netty.handler.timeout.ReadTimeoutHandler), (reactor.right.reactiveBridge = reactor.netty.channel.ChannelOperationsHandler)}
2019-07-10 14:51:19.543 DEBUG [-,,,] 2940 --- [ctor-http-nio-4] reactor.netty.ReactorNetty : [id: 0xa7f41d1e, L:/127.0.0.1:62384 ! R:localhost/127.0.0.1:8990] Non Removed handler: WriteTimeoutHandler, context: ChannelHandlerContext(WriteTimeoutHandler, [id: 0xa7f41d1e, L:/127.0.0.1:62384 ! R:localhost/127.0.0.1:8990]), pipeline: DefaultChannelPipeline{(reactor.left.loggingHandler = io.netty.handler.logging.LoggingHandler), (reactor.left.httpCodec = io.netty.handler.codec.http.HttpClientCodec), (WriteTimeoutHandler = io.netty.handler.timeout.WriteTimeoutHandler), (ReadTimeoutHandler = io.netty.handler.timeout.ReadTimeoutHandler), (reactor.right.reactiveBridge = reactor.netty.channel.ChannelOperationsHandler)}
2019-07-10 14:51:19.543 DEBUG [-,,,] 2940 --- [ctor-http-nio-4] reactor.netty.tcp.TcpClient : [id: 0xa7f41d1e, L:/127.0.0.1:62384 ! R:localhost/127.0.0.1:8990] INACTIVE
2019-07-10 14:51:19.544 DEBUG [-,,,] 2940 --- [ctor-http-nio-4] r.n.resources.PooledConnectionProvider : [id: 0xa7f41d1e, L:/127.0.0.1:62384 ! R:localhost/127.0.0.1:8990] onStateChange(GET{uri=/dataviews/TWN_EMPLBENINFO_FIXED?version=1.0.0&sequence=1, connection=PooledConnection{channel=[id: 0xa7f41d1e, L:/127.0.0.1:62384 ! R:localhost/127.0.0.1:8990]}}, [response_incomplete])
2019-07-10 14:51:19.544 WARN [-,,,] 2940 --- [ctor-http-nio-4] reactor.netty.channel.FluxReceive : [id: 0xa7f41d1e, L:/127.0.0.1:62384 ! R:localhost/127.0.0.1:8990] An exception has been observed post termination
和我的处理程序
protected Mono handleClientResponseError(final ClientResponse clientResponse) {
clientResponse.bodyToMono(Void.class);
Mono<ErrorResponse> errorResponse = clientResponse.body(BodyExtractors.toMono(ErrorResponse.class));
return errorResponse.flatMap(err -> {
log.debug("Received HttpStatusCodeException when calling {} Registry: {}", getGatewayName(),
err.getErrorEnvelope().getMessage());
return Mono.error(new UpStreamServiceHttpException(err, clientResponse.rawStatusCode()));
}).switchIfEmpty(Mono.error(() -> {
log.debug("Received HttpStatusCodeException when calling {} Registry: {}", getGatewayName());
return new UpStreamServiceHttpException("Bad Gateway", clientResponse.rawStatusCode());
}));
}
我已经尝试使用clientResponse.bodyToMono(Void.class);来完成响应，但它仍然无法正常工作，我需要一种方法来完成Web客户端的响应，然后能够重用连接池并摆脱那些日志消息。
我在GitHub上创建了一个问题，但它已经关闭了，所以我在这里提出这个问题。 https://github.com/spring-projects/spring-framework/issues/23249
