Question

我的Spring Boot应用程序遇到了一个非常奇怪的问题。我正在使用Eureka / Ribbon开发微服务应用程序以进行服务发现，该应用程序是一个统计生成器，提供了用于csv上传的API，并链接到数据库以进行数据检索，比较和持久性。

存在问题的流程非常简单：

在上传目录中检查未处理的文件
获取未处理文件的路径并将其放置在数组中
对于此数组的每个元素，请将其从Csv转换为pojo
???
致富

该调用是通过api（通过邮递员和浏览器进行尝试）进行的，该API调用了转换器微服务。转换器微服务将遍历上传直接列出每个未处理的文件。然后，在同一微服务中使用此列表进行处理。首先，转换器调用数据检索器微服务，该服务返回三个对象列表。然后使用它们基于csvs构建pojo。

在这里出现问题的地方是，此方法执行两次，而其他方法仅执行一次。

Csv-uploader微服务（入口端点）

@GetMapping("/proxy/csv/process")
public void processProxyCsv(){
    logger.info("Called for processing uploaded CSVs");
    csvConverterServiceProxy.processPendingCsv();

}

和使用的代理：

@FeignClient(name="bbx-rev-csv-converter")
@RibbonClient(name="bbx-rev-csv-converter")
public interface CsvConverterServiceProxy {
    @GetMapping("/csv/process/running")
    public String processPendingCsv();
}

到目前为止，一切似乎都正常，日志仅显示一次。

然后，我们转到csv-converter微服务，其中发生了所有魔术（错误也包括bug），入口端点先前称为：

@GetMapping("/csv/process/running")
public ResponseEntity<String> processPendingCsv() {
    HttpHeaders headers = new HttpHeaders();
    HttpStatus status = HttpStatus.BAD_REQUEST;
    String reason = "Pending...";

    logger.info("API call for processing pending CSVs.");
    if (fileHandlerService.checkForNonProcessedFiles()) {
        logger.info("Check over, returning to entry flow.");
        logger.info("file path : " + fileHandlerService.getUploadedFilePath().toString());
        csvConverterService.convertAllCsv(fileHandlerService.getUploadedFilePath());
        reason = "Processing pending CSVs in progress...";
    } else {
        reason = "No pending files found.";
    }
    status = HttpStatus.OK;

    return new ResponseEntity<String>(reason, headers, status);

}

这时，基于日志，此操作执行两次。

我已经仔细阅读了所有代码，没有两次调用，也没有因为调用此代理方法而错误地创建了一个循环（或者至少没有找到它，实际上，我希望我做些愚蠢的事情）。 / p>

甚至在所有服务都运行了一段时间（几分钟后）后，当我调用同一端点时，它变得很奇怪。调用仅进行一次。

这是日志：

首先，Csv上传器日志：

2018-08-09 14:35:17.407  INFO 4588 --- [nio-8000-exec-7] Csv-up-ctrl : Called for processing uploaded CSVs

csv转换器日志...

2018-08-09 14:35:17.470  INFO 17280 --- [nio-8006-exec-1] o.a.c.c.C.[Tomcat].[localhost].[/]       : Initializing Spring FrameworkServlet 'dispatcherServlet'
2018-08-09 14:35:17.470  INFO 17280 --- [nio-8006-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization started
2018-08-09 14:35:17.504  INFO 17280 --- [nio-8006-exec-1] o.s.web.servlet.DispatcherServlet        : FrameworkServlet 'dispatcherServlet': initialization completed in 34 ms
2018-08-09 14:35:17.547  INFO 17280 --- [nio-8006-exec-1] Csv converter controller                 : API call for processing pending CSVs.
2018-08-09 14:35:17.548  INFO 17280 --- [nio-8006-exec-1] File checker service                     : Checking for unprocessed files ...
2018-08-09 14:35:17.555  INFO 17280 --- [nio-8006-exec-1] File checker service                     : Found 1 unprocessed files : [test_file.csv]
2018-08-09 14:35:17.555  INFO 17280 --- [nio-8006-exec-1] Csv converter controller                 : Check over, returning to entry flow.
2018-08-09 14:35:17.555  INFO 17280 --- [nio-8006-exec-1] Csv converter controller                 : file path : E:\workspace\Blackbox-reversements\csv-uploader\uploads\todo
2018-08-09 14:35:17.555  INFO 17280 --- [nio-8006-exec-1] Csv converter service                    : convertAllCsv call
2018-08-09 14:35:17.561  INFO 17280 --- [nio-8006-exec-1] s.c.a.AnnotationConfigApplicationContext : Refreshing SpringClientFactory-bbx-rev-ext-data-retriever: startup date [Thu Aug 09 14:35:17 CEST 2018]; parent: org.springframework.boot.web.servlet.context.AnnotationConfigServletWebServerApplicationContext@7d18bd1a
2018-08-09 14:35:17.659  INFO 17280 --- [nio-8006-exec-1] f.a.AutowiredAnnotationBeanPostProcessor : JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
2018-08-09 14:35:18.002  INFO 17280 --- [nio-8006-exec-1] c.netflix.config.ChainedDynamicProperty  : Flipping property: bbx-rev-ext-data-retriever.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647
2018-08-09 14:35:18.034  INFO 17280 --- [nio-8006-exec-1] c.n.u.concurrent.ShutdownEnabledTimer    : Shutdown hook installed for: NFLoadBalancer-PingTimer-bbx-rev-ext-data-retriever
2018-08-09 14:35:18.079  INFO 17280 --- [nio-8006-exec-1] c.netflix.loadbalancer.BaseLoadBalancer  : Client: bbx-rev-ext-data-retriever instantiated a LoadBalancer: DynamicServerListLoadBalancer:{NFLoadBalancer:name=bbx-rev-ext-data-retriever,current list of Servers=[],Load balancer stats=Zone stats: {},Server stats: []}ServerList:null
2018-08-09 14:35:18.090  INFO 17280 --- [nio-8006-exec-1] c.n.l.DynamicServerListLoadBalancer      : Using serverListUpdater PollingServerListUpdater
2018-08-09 14:35:18.125  INFO 17280 --- [nio-8006-exec-1] c.netflix.config.ChainedDynamicProperty  : Flipping property: bbx-rev-ext-data-retriever.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647
2018-08-09 14:35:18.127  INFO 17280 --- [nio-8006-exec-1] c.n.l.DynamicServerListLoadBalancer      : DynamicServerListLoadBalancer for client bbx-rev-ext-data-retriever initialized: DynamicServerListLoadBalancer:{NFLoadBalancer:name=bbx-rev-ext-data-retriever,current list of Servers=[192.168.0.130:8036],Load balancer stats=Zone stats: {defaultzone=[Zone:defaultzone;    Instance count:1;   Active connections count: 0;    Circuit breaker tripped count: 0;   Active connections per server: 0.0;]
},Server stats: [[Server:192.168.0.130:8036;    Zone:defaultZone;   Total Requests:0;   Successive connection failure:0;    Total blackout seconds:0;   Last connection made:Thu Jan 01 01:00:00 CET 1970;  First connection made: Thu Jan 01 01:00:00 CET 1970;    Active Connections:0;   total failure count in last (1000) msecs:0; average resp time:0.0;  90 percentile resp time:0.0;    95 percentile resp time:0.0;    min resp time:0.0;  max resp time:0.0;  stddev resp time:0.0]
]}ServerList:org.springframework.cloud.netflix.ribbon.eureka.DomainExtractingServerList@11bc0eb
2018-08-09 14:35:18.414  INFO 17280 --- [nio-8006-exec-5] Csv converter controller                 : API call for processing pending CSVs.
2018-08-09 14:35:18.414  INFO 17280 --- [nio-8006-exec-5] File checker service                     : Checking for unprocessed files ...
2018-08-09 14:35:18.415  INFO 17280 --- [nio-8006-exec-5] File checker service                     : Found 1 unprocessed files : [test_file.csv]
2018-08-09 14:35:18.415  INFO 17280 --- [nio-8006-exec-5] Csv converter controller                 : Check over, returning to entry flow.
2018-08-09 14:35:18.415  INFO 17280 --- [nio-8006-exec-5] Csv converter controller                 : file path : E:\workspace\Blackbox-reversements\csv-uploader\uploads\todo
2018-08-09 14:35:18.415  INFO 17280 --- [nio-8006-exec-5] Csv converter service                    : convertAllCsv call
2018-08-09 14:35:18.989  INFO 17280 --- [nio-8006-exec-5] Csv converter service                    : CSVs path will go here
2018-08-09 14:35:19.050  INFO 17280 --- [nio-8006-exec-1] Csv converter service                    : CSVs path will go here
2018-08-09 14:35:19.095  INFO 17280 --- [erListUpdater-0] c.netflix.config.ChainedDynamicProperty  : Flipping property: bbx-rev-ext-data-retriever.ribbon.ActiveConnectionsLimit to use NEXT property: niws.loadbalancer.availabilityFilteringRule.activeConnectionsLimit = 2147483647

所以不太好。可能是配置问题吗？对于我的微服务配置，我一直将其保持为原始状态：

对于主要班级：

@SpringBootApplication
@EnableFeignClients("com.telemaque.blackbox.reversement.csvuploader")
@EnableDiscoveryClient
public class CsvUploaderApplication {...

对于application.properties文件：

spring.application.name=bbx-rev-csv-converter
server.port=8006
eureka.client.service-url.default-zone=http://localhost:8761/eureka

和命名服务器的application.properties：

spring.application.name=bbx-rev-naming-server
server.port=8761

eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false

对于命名服务器：

@SpringBootApplication
@EnableEurekaServer
public class NamingServerApplication {...

对于代理：

@FeignClient(name="bbx-rev-ext-data-retriever")
@RibbonClient(name="bbx-rev-ext-data-retriever")
public interface ExternalDataRetrieverProxy {...

我一直在浏览eureka git，看向弹簧的一面，但仍然不明白。这让我发疯，如果您有任何想法，我想听听！

非常感谢您的帮助！

编辑：进行了更多测试，我在命名服务器中发现了奇怪的日志：

2018-08-09 14:55:08.320  INFO 15068 --- [nio-8761-exec-2] c.n.e.registry.AbstractInstanceRegistry  : Registered instance BBX-REV-CSV-CONVERTER/192.168.0.130:bbx-rev-csv-converter:8006 with status UP (replication=false)
2018-08-09 14:55:08.832  INFO 15068 --- [io-8761-exec-10] c.n.e.registry.AbstractInstanceRegistry  : Registered instance BBX-REV-CSV-CONVERTER/192.168.0.130:bbx-rev-csv-converter:8006 with status UP (replication=true)

此外，当我直接调用API（而不是通过第一个微服务）时，它只能正确执行一次。

Answer 1

这可能是因为功能区在连接超时时会重试。有关该检查的详细信息spring retry。要解决此问题，您可以按照以下步骤操作：-

在您的csv转换器微服务feignClientName.ribbon.OkToRetryOnAllOperations=false使用者的 application.properties 中

，您还可以在application.yml

处查看更多属性

春季Eureka Ribbon方法执行两次

1 个答案: