java - jackson.databind 没有这样的方法错误

Question

我正在使用 auth0-java与 auth0 交互的客户端库v2服务，我的代码编译并在我的开发环境中运行良好，但是当我在另一个测试环境中部署该构建时，它会抛出以下异常:

java.lang.NoSuchMethodError:com.fasterxml.jackson.databind.ObjectMapper.readerFor(Lcom/fasterxml/jackson/databind/JavaType;)Lcom/fasterxml/jackson/databind/ObjectReader;
    at com.auth0.json.mgmt.users.UsersPageDeserializer.getArrayElements(UsersPageDeserializer.java:52)
    at com.auth0.json.mgmt.users.UsersPageDeserializer.deserialize(UsersPageDeserializer.java:30)
    at com.auth0.json.mgmt.users.UsersPageDeserializer.deserialize(UsersPageDeserializer.java:15)
    at com.fasterxml.jackson.databind.ObjectMapper._readMapAndClose(ObjectMapper.java:3562)
    at com.fasterxml.jackson.databind.ObjectMapper.readValue(ObjectMapper.java:2597)
    at com.auth0.net.CustomRequest.parseResponse(CustomRequest.java:63)
    at com.auth0.net.BaseRequest.execute(BaseRequest.java:37)
    at com.myapp.security.Auth0Service.getUserByEmail(Auth0Service.java:246)
    at com.myapp.security.Auth0Service.checkForExsistingAuth0Account(Auth0Service.java:266)
    at com.myapp.security.AdminUILayout.lambda$launchProgressUpdater$0(AdminUILayout.java:293)
at java.lang.Thread.run(Thread.java:745)

我已经解决了几个 stackover 流程​​问题，例如 this并通过清洁尝试.m2/repository/com/fasterxml该测试环境的文件夹，但无法解决没有此类方法的错误 这是我的pom文件，相关代码如下:

代码

public User getUserByEmail(String email){
        UserFilter filter = new UserFilter();
        filter.withQuery(email);
        Request<UsersPage> request = mgmt.users().list(filter);
        try {
            UsersPage response = request.execute();
            for (User u:response.getItems()) {
                if (u.getEmail().equals(email)) {
                    return u;
                }
            }
        } catch (APIException exception) {
            // api error
            System.out.println("APIException:::::"+exception.getDescription());
        } catch (Auth0Exception exception) {
            // request error
             System.out.println("Auth0Exception:::::"+exception.getMessage());
        }catch(Exception ex){
            System.out.println("Other exception:::::"+ex.getMessage());
        }
        return null;
    }

pom.xml

<properties>
    <jackson.version>2.8.5</jackson.version>
  </properties>
        <dependency>
            <groupId>com.fasterxml.jackson.dataformat</groupId>
            <artifactId>jackson-dataformat-yaml</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-databind</artifactId>
            <version>${jackson.version}</version>
        </dependency>
        <dependency>
            <groupId>com.fasterxml.jackson.core</groupId>
            <artifactId>jackson-annotations</artifactId>
            <version>${jackson.version}</version>
        </dependency>
     <dependency>
        <groupId>com.auth0</groupId>
        <artifactId>auth0</artifactId>
        <version>1.0.0</version>
    </dependency>

更新 我已将那些 jackson 依赖项移动到 <dependencyManagement> 中我的部分 pom.xml文件，

<dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-core</artifactId>
                <version>2.8.5</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-databind</artifactId>
                <version>2.8.5</version>
            </dependency>
            <dependency>
                <groupId>com.fasterxml.jackson.core</groupId>
                <artifactId>jackson-annotations</artifactId>
                <version>2.8.0</version>
            </dependency>
        </dependencies>
    </dependencyManagement>

根据 maven documentation ,无论哪个版本的库jackson-core由依赖项请求，版本 ${jackson.version}将始终被使用，我的代码仍然在本地工作，但在那个测试服务器上 异常保持不变，即使我在该测试服务器代码中部署我的 war 文件也会抛出相同的异常。

Answer 1

很可能你已经针对不同版本的类编译了你的代码，而不是你在运行它时使用的版本。

请确保在您运行代码的环境中没有任何其他版本的 jackson-databind 依赖于您的类路径。