使用Elasticsearch 5.0客戶端的Springboot-Log4j2錯誤

Question

我試圖將Elasticsearch 5.0 transport客戶端與sprintboot應用程序一起使用。 Elasticsearch 5.0客戶端使用log4j2，當我啟動springboot服務時，ES客戶端拋出錯誤，因為它找不到log4j2類。 我嘗試了許多組合，但還沒有碰運氣。 有人在springboot應用程序中使用過ES 5客戶端嗎？

這是我的寶

<dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>org.springframework.boot</groupId>
                    <artifactId>spring-boot-starter-logging</artifactId>
                </exclusion>
                <exclusion>
                    <artifactId>logback-classic</artifactId>
                    <groupId>ch.qos.logback</groupId>
                </exclusion>
                <exclusion>
                    <artifactId>log4j-over-slf4j</artifactId>
                    <groupId>org.slf4j</groupId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>org.slf4j</groupId>
            <artifactId>log4j-over-slf4j</artifactId>

        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-log4j2</artifactId>
        </dependency>

錯誤..

 Caused by: java.lang.NoClassDefFoundError: org/apache/logging/log4j/Logger
    at org.elasticsearch.common.logging.Loggers.getLogger(Loggers.java:105)
    at org.elasticsearch.common.logging.Loggers.getLogger(Loggers.java:72)
    at org.elasticsearch.common.component.AbstractComponent.<init>(AbstractComponent.java:37)
    at org.elasticsearch.plugins.PluginsService.<init>(PluginsService.java:110)
    at org.elasticsearch.client.transport.TransportClient.newPluginService(TransportClient.java:81)
    at org.elasticsearch.client.transport.TransportClient.buildTemplate(TransportClient.java:106)
    at org.elasticsearch.client.transport.TransportClient.<init>(TransportClient.java:228)
    at org.elasticsearch.transport.client.PreBuiltTransportClient.<init>(PreBuiltTransportClient.java:69)
    at org.elasticsearch.transport.client.PreBuiltTransportClient.<init>(PreBuiltTransportClient.java:65)
    at com.qualys.service.config.IndexingServiceConfiguration.indexingClient(IndexingServiceConfiguration.java:149)
    at com.qualys.service.config.IndexingServiceConfiguration$$EnhancerBySpringCGLIB$$67ddb691.CGLIB$indexingClient$1(<generated>)
    at com.qualys.service.config.IndexingServiceConfiguration$$EnhancerBySpringCGLIB$$67ddb691$$FastClassBySpringCGLIB$$806f0fda.invoke(<generated>)
    at org.springframework.cglib.proxy.MethodProxy.invokeSuper(MethodProxy.java:228)
    at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanMethodInterceptor.intercept(ConfigurationClassEnhancer.java:356)
    at com.qualys.service.config.IndexingServiceConfiguration$$EnhancerBySpringCGLIB$$67ddb691.indexingClient(<generated>)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:162)
    ... 38 more
Caused by: java.lang.ClassNotFoundException: org.apache.logging.log4j.Logger
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    ... 58 more

Answer 1

請添加依賴項

1. log4j的-API
2. log4j的核心
3. log4j的-SLF4J-IMPL

當前的最新版本是2.8。

您可以刪除log4j-over-slf4j依賴性，這是針對舊Log4j 1.2的。

Answer 2

如果您對version有dependency ，該怎么辦：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-log4j2</artifactId>
    <version>1.2.3.RELEASE</version>
</dependency>

資源

Answer 3

我正在將Spring Boot與ES客戶端一起使用。 嘗試以下依賴項

<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>


        <!--elastic search client-->
        <dependency>
            <groupId>org.elasticsearch.client</groupId>
            <artifactId>transport</artifactId>
            <version>5.0.1</version>
        </dependency>

        <!--log 4j-->
        <dependency>
            <groupId>org.apache.logging.log4j</groupId>
            <artifactId>log4j-api</artifactId>
            <version>2.6.2</version>
        </dependency>
    </dependencies> 

同樣在pom.xml的屬性中添加以下內容

<properties>
        <elasticsearch.version>5.0.0</elasticsearch.version>
</properties>

Answer 4

檢查此鏈接，顯然尚未完成Springboot版本，尚不支持彈性搜索5.0.0版本，您可能希望將es版本降級為2.xx.xx。

https://github.com/spring-projects/spring-data-elasticsearch/wiki/Spring-Data-Elasticsearch---Spring-Boot---version-matrix