SpringBoot与Eureka

• SpringBoot：2.5.4版本
• Eureka：SpringCloud2020.3版本

错误1

• Eureka-Server出错

***************************
APPLICATION FAILED TO START
***************************

Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

    java.lang.invoke.MethodHandleNatives.resolve(Native Method)

The following method did not exist:

    com.google.gson.GsonBuilder.setLenient()Lcom/google/gson/GsonBuilder;

The method's class, com.google.gson.GsonBuilder, is available from the following locations:

    jar:file:/D:/Maven/apache-maven-3.6.3-bin/apache-maven-3.6.3/warehouse/com/google/code/gson/gson/2.1/gson-2.1.jar!/com/google/gson/GsonBuilder.class

The class hierarchy was loaded from the following locations:

    com.google.gson.GsonBuilder: file:/D:/Maven/apache-maven-3.6.3-bin/apache-maven-3.6.3/warehouse/com/google/code/gson/gson/2.1/gson-2.1.jar


Action:

Correct the classpath of your application so that it contains a single, compatible version of com.google.gson.GsonBuilder

• Eurreka-Client出错

***************************
APPLICATION FAILED TO START
***************************

Description:

An attempt was made to call a method that does not exist. The attempt was made from the following location:

    java.lang.invoke.MethodHandleNatives.resolve(Native Method)

The following method did not exist:

    com.google.gson.GsonBuilder.setLenient()Lcom/google/gson/GsonBuilder;

The method's class, com.google.gson.GsonBuilder, is available from the following locations:

    jar:file:/D:/Maven/apache-maven-3.6.3-bin/apache-maven-3.6.3/warehouse/com/google/code/gson/gson/2.1/gson-2.1.jar!/com/google/gson/GsonBuilder.class

The class hierarchy was loaded from the following locations:

    com.google.gson.GsonBuilder: file:/D:/Maven/apache-maven-3.6.3-bin/apache-maven-3.6.3/warehouse/com/google/code/gson/gson/2.1/gson-2.1.jar


Action:

Correct the classpath of your application so that it contains a single, compatible version of com.google.gson.GsonBuilder

• 解决方法：在两个微服务的pom.xml中加入如下依赖

<dependency>
    <groupId>com.google.code.gson</groupId>
    <artifactId>gson</artifactId>
    <version>2.8.6</version>
</dependency>

错误2

• Eureka-Server出错

Caused by: java.lang.NoSuchMethodError: com.fasterxml.jackson.core.JsonParser.getReadCapabilities()Lcom/fasterxml/jackson/core/util/JacksonFeatureSet;

• Eureka-Client出错

com.netflix.discovery.shared.transport.TransportException: Cannot execute request on any known server

• 解决方法：在两个微服务的pom.xml中加入如下依赖

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.12.4</version>
</dependency>

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-annotations</artifactId>
    <version>2.12.4</version>
</dependency>