java.lang.NoClassDefFoundError: org.slf4j.LoggerFactory

java

Solution

Add a SLF4J implementation (as you only have its API):

<dependency>
    <groupId>org.slf4j</groupId>
    <artifactId>slf4j-log4j12</artifactId>
    <version>2.0.12</version>
</dependency>

Problem

I am getting the error as mentioned below, while running the feed utility. I am trying to load an image "logo.png". The `slf4j` jar file is also available in the runtime classpath. But still I am getting this error. ``` Oct 16, 2012 7:34:11 PM com.ibm.commerce.foundation.dataload.FeedRetriever invokeDataLoad SEVERE: An error occurred while performing data load. Throwable occurred: com.ibm.commerce.foundation.dataload.exception.DataLoadException: An error occurred while executing the data load. java.lang.NoClassDefFoundError: org.slf4j.LoggerFactory at com.ibm.commerce.foundation.dataload.DataLoaderMain.execute(DataLoaderMain.java:664) at com.ibm.commerce.content.commands.DataLoadInvoker.execute(DataLoadInvoker.java:101) at com.ibm.commerce.foundation.dataload.FeedRetriever.invokeDataLoad(FeedRetriever.java:244) at com.ibm.commerce.foundation.dataload.FeedRetriever.execute(FeedRetriever.java:172) at com.ibm.commerce.foundation.dataload.FeedRetriever.main(FeedRetriever.java:321) Caused by: java.lang.RuntimeException: java.lang.NoClassDefFoundError: org.slf4j.LoggerFactory at com.ibm.commerce.foundation.dataload.DataLoaderMain.execute(DataLoaderMain.java:488) ... 4 more Caused by: java.lang.NoClassDefFoundError: org.slf4j.LoggerFactory at org.apache.wink.client.ClientConfig.<clinit>(ClientConfig.java:52) at java.lang.J9VMInternals.initializeImpl(Native Method) at java.lang.J9VMInternals.initialize(J9VMInternals.java:200) at java.lang.J9VMInternals.initialize(J9VMInternals.java:167) at com.ibm.commerce.foundation.dataload.feedreader.AtomReader.getFeed(AtomReader.java:104) at com.ibm.commerce.foundation.dataload.feedreader.AtomReader.getEntries(AtomReader.java:147) at com.ibm.commerce.foundation.dataload.feedreader.AtomReader.getEntries(AtomReader.java:1) at com.ibm.commerce.foundation.dataload.feedreader.BaseFeedReader.init(BaseFeedReader.java:252) at com.ibm.commerce.foundation.dataload.AbstractBusinessObjectLoader.initializeDataReaders(AbstractBusinessObjectLoader.java:1344) at com.ibm.commerce.foundation.dataload.AbstractBusinessObjectLoader.init(AbstractBusinessObjectLoader.java:369) at com.ibm.commerce.foundation.dataload.BusinessObjectLoader.init(BusinessObjectLoader.java:65) at com.ibm.commerce.foundation.dataload.DataLoaderMain.execute(DataLoaderMain.java:431) ... 4 more Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory at java.lang.ClassNotFoundException.<init>(ClassNotFoundException.java:76) at java.net.URLClassLoader.findClass(URLClassLoader.java:396) at java.lang.ClassLoader.loadClass(ClassLoader.java:660) at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:358) at java.lang.ClassLoader.loadClass(ClassLoader.java:626) ... 16 more Oct 16, 2012 7:34:11 PM com.ibm.commerce.foundation.dataload.FeedRetriever main SEVERE: An error occurred while performing data load. Throwable occurred: com.ibm.commerce.foundation.dataload.exception.DataLoadException: An error has occurred. If this problem persists, contact product support. at com.ibm.commerce.foundation.dataload.FeedRetriever.invokeDataLoad(FeedRetriever.java:247) at com.ibm.commerce.foundation.dataload.FeedRetriever.execute(FeedRetriever.java:172) at com.ibm.commerce.foundation.dataload.FeedRetriever.main(FeedRetriever.java:321) ```

Original source