NoClassDefFoundError: org/slf4j/LoggerFactory

Assuntos Gerais
#1

Opa… Estou desenvolvendo com o Vraptor faz alguns meses. Entretanto uma coisa me incomoda algumas vezes, um erro na inicialização do tomcat:

31/07/2013 22:51:24 org.apache.catalina.core.AprLifecycleListener init
INFO: The APR based Apache Tomcat Native library which allows optimal performance in production environments was not found on the java.library.path: C:\Program Files\Java\jre6\bin;C:\Windows\Sun\Java\bin;C:\Windows\system32;C:\Windows;C:\Program Files\Common Files\Microsoft Shared\Windows Live;C:\Program Files (x86)\Common Files\Microsoft Shared\Windows Live;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Program Files\Intel\WiFi\bin\;C:\Program Files\Common Files\Intel\WirelessCommon\;C:\Program Files (x86)\Windows Live\Shared;C:\Program Files (x86)\Common Files\Roxio Shared\DLLShared\;C:\Program Files (x86)\Common Files\Roxio Shared\OEM\DLLShared\;C:\Program Files (x86)\Common Files\Roxio Shared\OEM\DLLShared\;C:\Program Files (x86)\Common Files\Roxio Shared\OEM\12.0\DLLShared\;C:\Program Files (x86)\Roxio\OEM\AudioCore\;C:\Program Files\Satsuki Decoder Pack\Filtres;C:\Program Files (x86)\SSH Communications Security\SSH Secure Shell;.
31/07/2013 22:51:24 org.apache.tomcat.util.digester.SetPropertiesRule begin
AVISO: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:Simulado' did not find a matching property.
31/07/2013 22:51:24 org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["http-bio-8080"]
31/07/2013 22:51:24 org.apache.coyote.AbstractProtocol init
INFO: Initializing ProtocolHandler ["ajp-bio-8009"]
31/07/2013 22:51:24 org.apache.catalina.startup.Catalina load
INFO: Initialization processed in 842 ms
31/07/2013 22:51:24 org.apache.catalina.core.StandardService startInternal
INFO: Starting service Catalina
31/07/2013 22:51:24 org.apache.catalina.core.StandardEngine startInternal
INFO: Starting Servlet Engine: Apache Tomcat/7.0.20
31/07/2013 22:51:25 org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["http-bio-8080"]
31/07/2013 22:51:25 org.apache.coyote.AbstractProtocol start
INFO: Starting ProtocolHandler ["ajp-bio-8009"]
31/07/2013 22:51:25 org.apache.catalina.startup.Catalina start
INFO: Server startup in 1077 ms
31/07/2013 22:51:35 org.apache.catalina.loader.WebappClassLoader modified
INFO:     Additional JARs have been added
31/07/2013 22:51:35 org.apache.catalina.core.StandardContext reload
INFO: Reloading Context with name [] has started
31/07/2013 22:51:36 org.apache.catalina.core.StandardContext filterStart
GRAVE: Exception starting filter vraptor
java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
	at br.com.caelum.vraptor.VRaptor.<clinit>(VRaptor.java:59)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(Unknown Source)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source)
	at java.lang.reflect.Constructor.newInstance(Unknown Source)
	at java.lang.Class.newInstance0(Unknown Source)
	at java.lang.Class.newInstance(Unknown Source)
	at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:119)
	at org.apache.catalina.core.ApplicationFilterConfig.getFilter(ApplicationFilterConfig.java:252)
	at org.apache.catalina.core.ApplicationFilterConfig.setFilterDef(ApplicationFilterConfig.java:372)
	at org.apache.catalina.core.ApplicationFilterConfig.<init>(ApplicationFilterConfig.java:98)
	at org.apache.catalina.core.StandardContext.filterStart(StandardContext.java:4584)
	at org.apache.catalina.core.StandardContext$2.call(StandardContext.java:5262)
	at org.apache.catalina.core.StandardContext$2.call(StandardContext.java:5257)
	at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
	at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1678)
	at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1523)
	... 19 more
31/07/2013 22:51:36 org.apache.catalina.core.StandardContext startInternal
GRAVE: Error filterStart
31/07/2013 22:51:36 org.apache.catalina.core.StandardContext startInternal
GRAVE: Context [] startup failed due to previous errors
31/07/2013 22:51:36 org.apache.catalina.core.StandardContext reload
INFO: Reloading Context with name [] is completed

A lib “slf4j-api-1.6.1.jar” está lá!
Para contornar a situação, tenho que dar um clean no projeto, clean no work do tomcat e tentar novamente (se necessário repetir algumas vezes).
Uso o eclipse indigo, vraptor 3.4.1, apache-tomcat-7.0.20 e jdk1.6.

Alguém poderia me dar uma luz para acabar com esse incômodo?
Agradeço!

#2

Boa noite Felipe!

Vc está usando o eclipse com maven? Tive um problema parecido, onde o eclipse toda hora removia as dependências do maven do meu Web Deployment Assembly.

Abs.

#3

Até tenho o plugin do maven, mas ele não está configurado…
É o seu caso??

#4

não adianta o jar estar no classpath… ele precisa estar em WEB-INF/lib, ou vc marcá-lo na configuração de deployment assembly do projeto.

#5

Boa noite Lucas,

Então… a lib está na pasta e a lib “slf4j-log4j12-1.6.1.jar” também!!
Note que é um problema casual… Tem vezes que ocorre, tem vezes que não. Mas eu imagino que tenha alguma razão lógica.
Quando ocorre eu faço a operação que citei (clean tomcat, project …) e tento de novo. As vezes dá certo, as vezes tenho que repetir o processo.

#6