Azure Java 函数 -502-Bad Gateway

Question

我已经按照以下链接创建了 Java azure 函数：

https://docs.microsoft.com/en-us/azure/azure-functions/functions-create-first-java-maven

Java 类：

package com.khan;

import java.util.*;
import com.microsoft.azure.serverless.functions.annotation.*;
import com.microsoft.azure.serverless.functions.*;

/**
 * Azure Functions with HTTP Trigger.
 */
public class Function {
    /**
     * This function listens at endpoint "/api/hello". Two ways to invoke it using "curl" command in bash:
     * 1. curl -d "HTTP Body" {your host}/api/hello
     * 2. curl {your host}/api/hello?name=HTTP%20Query
     */
    @FunctionName("hello")
    public HttpResponseMessage<String> hello(
            @HttpTrigger(name = "req", methods = {"get", "post"}, authLevel = AuthorizationLevel.ANONYMOUS) HttpRequestMessage<Optional<String>> request,
            final ExecutionContext context) {
                
        context.getLogger().info("Java HTTP trigger processed a request.");

        // Parse query parameter
        String query = request.getQueryParameters().get("name");
        String name = request.getBody().orElse(query);

        if (name == null) {
            return request.createResponse(400, "Please pass a name on the query string or in the request body");
        } else {
            return request.createResponse(200, "Hello, " + name);
        }
                
    }
}

函数创建和部署成功

现在当我尝试使用 curl 访问时

curl -w '\n' https://sundaydemo-20180526141357482.azurewebsites.net -d AzureFunctions

or postman 

https://sundaydemo-20180526141357482.azurewebsites.net/api/hello

然后出现以下错误，我想知道是否有人遇到同样的错误。

502-坏网关

指定的 CGI 应用程序遇到错误，服务器终止了进程。

日志：

2018-05-31T02:02:50  Welcome, you are now connected to log-streaming service.
2018-05-31T02:03:50  No new trace in the past 1 min(s).
2018-05-31T02:04:50  No new trace in the past 2 min(s).
2018-05-31T02:05:50  No new trace in the past 3 min(s).
2018-05-31T02:06:50  No new trace in the past 4 min(s).
2018-05-31T02:07:50  No new trace in the past 5 min(s).
2018-05-31T02:08:50  No new trace in the past 6 min(s).
2018-05-31T02:09:17.161 [Information] Executing 'Functions.hello' (Reason='This function was programmatically called via the host APIs.', Id=b43d17c9-35c0-4c84-ab7e-26a8ec721fe9)
2018-05-31T02:10:50  No new trace in the past 1 min(s).
2018-05-31T02:11:50  No new trace in the past 2 min(s).
2018-05-31T02:12:50  No new trace in the past 3 min(s).
2018-05-31T02:13:50  No new trace in the past 4 min(s).
2018-05-31T02:14:17.183 [Error] Timeout value of 00:05:00 exceeded by function 'Functions.hello' (Id: 'b43d17c9-35c0-4c84-ab7e-26a8ec721fe9'). Initiating cancellation.
2018-05-31T02:14:17.451 [Error] Microsoft.Azure.WebJobs.Host: Timeout value of 00:05:00 was exceeded by function: Functions.hello.
2018-05-31T02:14:17.572 [Error] Executed 'Functions.hello' (Failed, Id=b43d17c9-35c0-4c84-ab7e-26a8ec721fe9)
2018-05-31T02:15:50  No new trace in the past 1 min(s).
2018-05-31T02:16:50  No new trace in the past 2 min(s).
2018-05-31T02:17:50  No new trace in the past 3 min(s).
2018-05-31T02:18:50  No new trace in the past 4 min(s).

还尝试删除所有并添加 CORS *

存储：

Answer 1

看来你遇到了Function Runtime 2.0 Preview Breaking Change。

在门户上，函数运行时已更新为 2.0.11857.0（检查您的函数应用设置面板）。虽然 maven 插件还没有更新赶上来。

所以旧的mvn插件构建的代码与最新的运行时不兼容。

解决方法是将您的函数运行时固定到前一个。转到应用程序设置面板并将FUNCTIONS_EXTENSION_VERSION 从beta 更改为2.0.11776-alpha。

更多详情请见issue discussion，新插件即将推出。

Update-6/15

新插件已发布。见notice for jave language worker。

• 使用最新的 Maven Azure Functions Archetype 创建新项目

  mvn archetype:generate -DarchetypeGroupId=com.microsoft.azure -DarchetypeArtifactId=azure-functions-archetype 
  

• 更新现有项目以使用最新的 Azure Function mvn 插件

  1. 功能代码(*.java)

     之前

     import com.microsoft.azure.serverless.functions.annotation.*;
     import com.microsoft.azure.serverless.functions.*;
     

     之后（删除无服务器）

     import com.microsoft.azure.functions.annotation.*;
     import com.microsoft.azure.functions.*;
     

  2. pom.xml

     1)之前

     <dependency>
         <groupId>com.microsoft.azure</groupId>
         <artifactId>azure-functions-java-core</artifactId>
         <version>1.0.0-beta-2/3</version>
     </dependency>
     

     之后

     <dependency>
         <groupId>com.microsoft.azure.functions</groupId>
         <artifactId>azure-functions-java-library</artifactId>
         <version>1.0.0-beta-4</version>
     </dependency>
     

     2)在excludeArtifactIds中再找到一个azure-functions-java-core，改成azure-functions-java-library。

     3)找到azure-functions-maven-plugin，将版本改为1.0.0-beta-2。在maven 上查看最新版本。