搭建zipkin-server踩的坑

当前最新的zipkin-server版本为2.12.9，于是在pom文件中导入以下依赖

		<dependency>
            <groupId>io.zipkin.java</groupId>
            <artifactId>zipkin-server</artifactId>
            <version>2.12.9</version>
        </dependency>
        <dependency>
            <groupId>io.zipkin.java</groupId>
            <artifactId>zipkin-autoconfigure-ui</artifactId>
            <version>2.12.9</version>
        </dependency>

启动项目时，提示

SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/D:/MyRepository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/D:/MyRepository/org/apache/logging/log4j/log4j-slf4j-impl/2.11.2/log4j-slf4j-impl-2.11.2.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.
SLF4J: Actual binding is of type [ch.qos.logback.classic.util.ContextSelectorStaticBinder]

SLF4J绑定了多个实现的日志框架，不影响项目启动，但作为一个强迫症肯定是要改好的，pom文件中将zipkin-server绑定的log4j移除即可

		<dependency>
            <groupId>io.zipkin.java</groupId>
            <artifactId>zipkin-server</artifactId>
            <version>2.12.9</version>
            <exclusions>
                <exclusion>
                    <artifactId>log4j-slf4j-impl</artifactId>
                    <groupId>org.apache.logging.log4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>io.zipkin.java</groupId>
            <artifactId>zipkin-autoconfigure-ui</artifactId>
            <version>2.12.9</version>
        </dependency>

使用zipkin-server 2.12.9版本启动的话还会报错

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'armeriaServer' defined in class path resource [com/linecorp/armeria/spring/ArmeriaAutoConfiguration.class]: Bean instantiation via factory method failed; nested exception is org.springframework.beans.BeanInstantiationException: Failed to instantiate [com.linecorp.armeria.server.Server]: Factory method 'armeriaServer' threw exception; nested exception is java.lang.NullPointerException

网上查了以下，是因为从 2.12.6 版本开始有个较大的更新，迁移使用 Armeria HTTP 引擎。从此版本开始，若直接添加依赖的 Spring Boot 应用启动会存在冲突。既然2.12.6不行的话，那就试试2.12.5版本吧，改完pom文件后重新启动项目，项目完美启动。然后打开浏览器输入http://localhost:9411/

然而还是不行，不得已再降一下zipkin-server的版本试下吧，于是就换成了2.12.3版本

哎呀终于可以了，我太难了

最终引入的zipkin依赖是这样的

		<dependency>
            <groupId>io.zipkin.java</groupId>
            <artifactId>zipkin-server</artifactId>
            <version>2.12.3</version>
            <exclusions>
                <exclusion>
                    <artifactId>log4j-slf4j-impl</artifactId>
                    <groupId>org.apache.logging.log4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>io.zipkin.java</groupId>
            <artifactId>zipkin-autoconfigure-ui</artifactId>
            <version>2.12.3</version>
        </dependency>