最近项目修复安全漏洞,需要升级 hadoop-common 版本,从 2.7.2 升级到 2.10.2 版本。
升级一般通常是在 父类工程 使用 <dependencyManagement>
标签限制版本号,如下:
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version>2.10.2</version>
</dependency>
...
</dependencies>
</dependencyManagement>
结果运行工程,出现 如下错误:
SLF4J: Class path contains multiple SLF4J bindings.
SLF4J: Found binding in [jar:file:/C:/Users/.m2/repository/org/slf4j/slf4j-reload4j/1.7.36/slf4j-reload4j-1.7.36.jar!/org/slf4j/impl/StaticLoggerBinder.class]
SLF4J: Found binding in [jar:file:/C:/Users/.m2/repository/ch/qos/logback/logback-classic/1.2.3/logback-classic-1.2.3.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 [org.slf4j.impl.Reload4jLoggerFactory]
Exception in thread "main" java.lang.IllegalArgumentException: LoggerFactory is not a Logback LoggerContext but Logback is on the classpath. Either remove Logback or the competing implementation (class org.slf4j.impl.Reload4jLoggerFactory loaded from file:/C:/Users/.m2/repository/org/slf4j/slf4j-reload4j/1.7.36/slf4j-reload4j-1.7.36.jar). If you are using WebLogic you will need to add 'org.slf4j' to prefer-application-packages in WEB-INF/weblogic.xml: org.slf4j.impl.Reload4jLoggerFactory
产生这个错误的原因是在产生日志信息的时候有两个桥接器,发生冲突导致error。
通过 mvn dependency:tree 查看依赖关系, 确认发现 : slf4j-reload4j
桥接器在前面,取代 logback-classic
。
这里最直观是使用 idea 工具查看 pom 的依赖关系:
如何解决此问题?
- 可以找到指定依赖地方使用 ,剔除即可
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-reload4j</artifactId>
</exclusion>
</exclusions>
- 第2种类同上面,在
<dependencyManagement>
标签限制版本号 直接使用<exclusions>
, 如下:
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-common</artifactId>
<version>2.10.2</version>
<exclusions>
<exclusion>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-reload4j</artifactId>
</exclusion>
</exclusions>
</dependency>
...
</dependencies>
</dependencyManagement>