java.lang.ClassNotFoundException: org.apache.log4j.Logger
Oct 05 2020
Sto cercando di eseguire un'applicazione Spring ma continua a generare questo errore:
"Servlet.service () per servlet [dispatcherServlet] nel contesto con percorso [] ha generato un'eccezione [Invio del gestore non riuscito; l'eccezione annidata è java.lang.NoClassDefFoundError: org / apache / log4j / Logger] con causa principale
java.lang.ClassNotFoundException: org.apache.log4j.Logger "
Di seguito è la traccia dello stack dell'errore.
2020-10-05 12:52:34.835 ERROR 20412 --- [nio-8080-exec-2] o.a.c.c.C.[.[.[/].[dispatcherServlet] : Servlet.service() for servlet [dispatcherServlet] in context with path [] threw exception [Handler dispatch failed; nested exception is java.lang.NoClassDefFoundError: org/apache/log4j/Logger] with root cause
java.lang.ClassNotFoundException: org.apache.log4j.Logger
at java.net.URLClassLoader.findClass(URLClassLoader.java:382) ~[na:1.8.0_265]
at java.lang.ClassLoader.loadClass(ClassLoader.java:418) ~[na:1.8.0_265]
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352) ~[na:1.8.0_265] at java.lang.ClassLoader.loadClass(ClassLoader.java:351) ~[na:1.8.0_265] at com.mis.serverdata.utils.STWLogger.<init>(STWLogger.java:26) ~[ServerSharedUtils-1.1.4.jar:na] at com.mis.serverdata.utils.STWLogger.getLogger(STWLogger.java:35) ~[ServerSharedUtils-1.1.4.jar:na] at com.moveinsync.routeconfiguration.application.services.RouteConfigurationServiceAmazonS3Impl.getRoutingParameters(RouteConfigurationServiceAmazonS3Impl.java:102) ~[classes/:na] at com.moveinsync.routeconfiguration.application.controllers.RouteConfigurationController.getConfiguration(RouteConfigurationController.java:23) ~[classes/:na] at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) ~[na:1.8.0_265] at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) ~[na:1.8.0_265] at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) ~[na:1.8.0_265] at java.lang.reflect.Method.invoke(Method.java:498) ~[na:1.8.0_265] at org.springframework.web.method.support.InvocableHandlerMethod.doInvoke(InvocableHandlerMethod.java:190) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.springframework.web.method.support.InvocableHandlerMethod.invokeForRequest(InvocableHandlerMethod.java:138) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.ServletInvocableHandlerMethod.invokeAndHandle(ServletInvocableHandlerMethod.java:105) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.invokeHandlerMethod(RequestMappingHandlerAdapter.java:878) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter.handleInternal(RequestMappingHandlerAdapter.java:792) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.springframework.web.servlet.mvc.method.AbstractHandlerMethodAdapter.handle(AbstractHandlerMethodAdapter.java:87) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doDispatch(DispatcherServlet.java:1040) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.springframework.web.servlet.DispatcherServlet.doService(DispatcherServlet.java:943) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.springframework.web.servlet.FrameworkServlet.processRequest(FrameworkServlet.java:1006) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.springframework.web.servlet.FrameworkServlet.doGet(FrameworkServlet.java:898) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:626) ~[tomcat-embed-core-9.0.38.jar:4.0.FR] at org.springframework.web.servlet.FrameworkServlet.service(FrameworkServlet.java:883) ~[spring-webmvc-5.2.9.RELEASE.jar:5.2.9.RELEASE] at javax.servlet.http.HttpServlet.service(HttpServlet.java:733) ~[tomcat-embed-core-9.0.38.jar:4.0.FR] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:231) ~[tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:53) ~[tomcat-embed-websocket-9.0.38.jar:9.0.38] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.38.jar:9.0.38] at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:100) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.38.jar:9.0.38] at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:93) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.38.jar:9.0.38] at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:201) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:119) ~[spring-web-5.2.9.RELEASE.jar:5.2.9.RELEASE] at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:202) ~[tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:97) [tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:541) [tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:143) [tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) [tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:78) [tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) [tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:374) [tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65) [tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:868) [tomcat-embed-core-9.0.38.jar:9.0.38]
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1590) [tomcat-embed-core-9.0.38.jar:9.0.38] at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) [tomcat-embed-core-9.0.38.jar:9.0.38] at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149) [na:1.8.0_265] at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624) [na:1.8.0_265]
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) [tomcat-embed-core-9.0.38.jar:9.0.38]
at java.lang.Thread.run(Thread.java:748) [na:1.8.0_265]
Questo è il metodo getRoutingParameters nella classe RouteConfigurationServiceAmazonS3Impl in cui si verifica l'errore sulla riga STWLogger . Non so come risolvere questo problema. Qualcuno?
@Override
public RoutingParameters getRoutingParameters(String businessUnit) throws Exception {
RoutingParameters params = null;
String content = getRouteConfigurationData(businessUnit,
Constants.ROUTE_PARAMETER_FILENAME);
if (content == null) {
STWLogger.getLogger().debug("No Parameter Configuration found for " + businessUnit + "\nFetching Configuration for Default for businessUnit ");
content = getRouteConfigurationData(Constants.ROUTE_CONFIGURATION_DEFAULT_BUSINESSUNIT, Constants.ROUTE_PARAMETER_FILENAME);
if (content == null) {
return params;
}
params = GsonUtils.getGson().fromJson(content, RoutingParameters.class);
saveRoutingParameters(businessUnit, params);
return params;
}
params = GsonUtils.getGson().fromJson(content, RoutingParameters.class);
return params;
}
Aggiornamento : ho apportato le modifiche in base al secondo approccio della prima risposta fornita di seguito, ma l'errore persiste.
Di seguito è riportato il file pom.xml aggiornato per la mia applicazione
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.3.4.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.moveinsync.routeconfiguration</groupId>
<artifactId>RouteConfigurationCRUD</artifactId>
<version>0.0.1-SNAPSHOT</version>
<name>RouteConfigurationCRUD</name>
<description>Spring Application for Route Configuration</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Hoxton.SR8</spring-cloud.version>
</properties>
<dependencies>
<!-- MoveInSync Dependencies-->
<dependency>
<groupId>com.moveinsync.routeconfiguration</groupId>
<artifactId>mis-routeconfiguration-model</artifactId>
<version>2.1.4-SNAPSHOT</version>
</dependency>
<dependency>
<groupId>com.moveinsync.routeconfiguration</groupId>
<artifactId>mis-routeconfiguration-client</artifactId>
<version>2.1.8-SNAPSHOT</version>
</dependency>
<!-- Spring Boot -->
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-web</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-log4j2</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-cache</artifactId>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-aws</artifactId>
<version>2.2.2.RELEASE</version>
<exclusions>
<exclusion>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-configuration-processor</artifactId>
<optional>true</optional>
</dependency>
<!-- SLF4J-API -->
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.30</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.30</version>
<scope>test</scope>
</dependency>
<!-- Link SLF4J and log4j2 -->
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>2.0.1</version>
</dependency>
<!-- Spring -->
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version>5.2.9.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>5.2.9.RELEASE</version>
<exclusions>
<!-- Exclude Commons Logging in favor of SLF4j -->
<exclusion>
<groupId>commons-logging</groupId>
<artifactId>commons-logging</artifactId>
</exclusion>
</exclusions>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<!-- https://mvnrepository.com/artifact/org.springframework.cloud/spring-cloud-aws-context -->
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-aws-context</artifactId>
<version>2.2.2.RELEASE</version>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
<version>2.3.4.RELEASE</version>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>3.2.0</version>
<configuration>
<archive>
<manifest>
<addClasspath>true</addClasspath>
<classpathPrefix>lib/</classpathPrefix>
<mainClass>theMainClass</mainClass>
</manifest>
</archive>
</configuration>
</plugin>
</plugins>
</build>
</project>
Risposte
1 AdrienFerrand Oct 05 2020 at 08:29
Ok. La linea difettosa qui è:
STWLogger.getLogger().debug("No Parameter Configuration found for " + businessUnit + "\nFetching Configuration for Default for businessUnit ");
Non riesco a trovare il codice sorgente della STWLoggerclasse per confermare da un'analisi diretta, ma dallo stacktrace sembra che cerchi di istanziare il sistema di registrazione esplicitamente tramite Log4j, invece di fare affidamento sull'API di registrazione standard SLF4J che selezionerebbe il sistema di registrazione appropriato in fase di esecuzione.
Il problema qui è che non hai Log4j disponibile con la configurazione standard di Spring Boot che hai applicato. Infatti Spring Boot importerà e utilizzerà Logback come soluzione di registrazione predefinita nel tuo classpath, fornita dallo starter spring-boot-starter-loggingche è una dipendenza dello starter spring-boot-starter-webche usi in te pom.xml.
Hai due soluzioni secondo me.
- Sostituisci la linea difettosa con una chiamata all'API SLF4J, che utilizzerà Logback automaticamente dietro. Potrebbe essere qualcosa del tipo:
package org.mypackage;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
public class TestLog {
private static final Logger LOGGER = LoggerFactory.getLogger(TestLog.class);
public void test() {
LOGGER.info("Your log.");
}
}
- Sostituisci Logback con Log4j nella tua applicazione Spring Boot. Puoi seguire queste guide per farlo:
- https://docs.spring.io/spring-boot/docs/2.0.x/reference/html/howto-logging.html#howto-configure-log4j-for-logging
- https://www.baeldung.com/spring-boot-logging#log4j2-configuration-logging