The error I'm getting:
Error: A JNI error has occurred, please check your installation and try again
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/beam/sdk/transforms/DoFn
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2701)
at java.lang.Class.privateGetMethodRecursive(Class.java:3048)
at java.lang.Class.getMethod0(Class.java:3018)
at java.lang.Class.getMethod(Class.java:1784)
at sun.launcher.LauncherHelper.validateMainClass(LauncherHelper.java:544)
at sun.launcher.LauncherHelper.checkAndLoadMain(LauncherHelper.java:526)
Caused by: java.lang.ClassNotFoundException: org.apache.beam.sdk.transforms.DoFn
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 7 more
My pom dependencies:
<dependencies>
<dependency>
<groupId>com.google.cloud.bigtable</groupId>
<artifactId>bigtable-hbase-beam</artifactId>
<version>1.11.0</version>
</dependency>
<dependency>
<groupId>org.apache.beam</groupId>
<artifactId>beam-runners-google-cloud-dataflow-java</artifactId>
<version>2.13.0</version>
<scope>runtime</scope>
</dependency>
</dependencies>
I assumed that the issue was coming from the two dependencies using different versions of the beam sdk, so I changed the beam-runners-google-cloud-dataflow-java version to 2.11.0, which uses the same beam sdk version. But I got the same error.
Any help would be greatly appreciated!
How are you running the pipeline? I'm guessing that the issue is that the beam jars are not on your classpath. You either need to use the maven exec plugin to invoke your main() with all of the maven dependencies on the classpath or you need to create a fat jar using something like the maven shade plugin or the maven assembly plugin. Please see here for example of how to use the maven exec plugin to run a pipeline:
https://github.com/GoogleCloudPlatform/cloud-bigtable-examples/blob/a017a237fa8dae764451a658150190743c1b4127/java/dataflow-connector-examples/pom.xml#L146-L161
I have a spring boot project and getting some error related to javax servlet filter.
Is it some kind of version compatibility or I am missing something in pom file.
Following is the log from the console and the pom file.
I have been searching all over, couldn't find anything.
Exception in thread "main" java.lang.IllegalStateException: Cannot load configuration class: org.springframework.security.oauth2.config.annotation.web.configuration.AuthorizationServerSecurityConfiguration
at org.springframework.context.annotation.ConfigurationClassPostProcessor.enhanceConfigurationClasses(ConfigurationClassPostProcessor.java:403)
at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanFactory(ConfigurationClassPostProcessor.java:249)
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:281)
at org.springframework.context.support.PostProcessorRegistrationDelegate.invokeBeanFactoryPostProcessors(PostProcessorRegistrationDelegate.java:125)
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:687)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:525)
at org.springframework.boot.SpringApplication.refresh(SpringApplication.java:693)
at org.springframework.boot.SpringApplication.refreshContext(SpringApplication.java:360)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:303)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1118)
at org.springframework.boot.SpringApplication.run(SpringApplication.java:1107)
at com.abc.application.Application.main(Application.java:15)
Caused by: java.lang.IllegalStateException: Unable to load cache item
at org.springframework.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:79)
at org.springframework.cglib.core.internal.LoadingCache.get(LoadingCache.java:34)
at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData.get(AbstractClassGenerator.java:116)
at org.springframework.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:291)
at org.springframework.cglib.proxy.Enhancer.createHelper(Enhancer.java:480)
at org.springframework.cglib.proxy.Enhancer.createClass(Enhancer.java:337)
at org.springframework.context.annotation.ConfigurationClassEnhancer.createClass(ConfigurationClassEnhancer.java:138)
at org.springframework.context.annotation.ConfigurationClassEnhancer.enhance(ConfigurationClassEnhancer.java:110)
at org.springframework.context.annotation.ConfigurationClassPostProcessor.enhanceConfigurationClasses(ConfigurationClassPostProcessor.java:393)
... 11 more
Caused by: java.lang.NoClassDefFoundError: javax/servlet/Filter
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)
at java.lang.Class.getDeclaredConstructors(Class.java:2020)
at org.springframework.cglib.proxy.Enhancer.generateClass(Enhancer.java:566)
at org.springframework.cglib.transform.TransformingClassGenerator.generateClass(TransformingClassGenerator.java:33)
at org.springframework.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25)
at org.springframework.context.annotation.ConfigurationClassEnhancer$BeanFactoryAwareGeneratorStrategy.generate(ConfigurationClassEnhancer.java:252)
at org.springframework.cglib.core.AbstractClassGenerator.generate(AbstractClassGenerator.java:329)
at org.springframework.cglib.proxy.Enhancer.generate(Enhancer.java:492)
at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:93)
at org.springframework.cglib.core.AbstractClassGenerator$ClassLoaderData$3.apply(AbstractClassGenerator.java:91)
at org.springframework.cglib.core.internal.LoadingCache$2.call(LoadingCache.java:54)
at java.util.concurrent.FutureTask.run(FutureTask.java:266)
at org.springframework.cglib.core.internal.LoadingCache.createEntry(LoadingCache.java:61)
... 19 more
Caused by: java.lang.ClassNotFoundException: javax.servlet.Filter
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:331)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 33 more
For me problem were in pom file (in spring boot 2 project),
when I used a parent spring boot in version 2.1.9 which under the hood uses spring-core in version 5.1.10.RELEASE
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.1.9.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
I had dependency:
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>5.2.0.RELEASE</version>
</dependency>
removing it resolved problem
I was getting the similar error in my Gradle project(might be a problem with Maven too) when I was trying to upgrade my Spring Boot version to latest one.
A quick gradle clean solved that problem for me.
Usually, this Filter class can be found in embedded tomcat jar.
So please make sure that your application (jar) contains this file:
Open up the Jar file of the compiled spring boot application and check whether the jar named like tomcat-embed-core resides in the BOOT-INF\lib folder.
This answer is valid as long as you're running tomcat of course + use JAR artifact for spring boot application (for WAR the folder is different, probably WEB-INF/lib although I've never worked with WARs of Spring Boot application so I might be wrong here)
I am running the normal Nutch indexing, it used to work 2 days ago perfectly but today out of nowhere it just stopped working with the previous error. Following the stack error:
Exception in thread "main" java.lang.NoClassDefFoundError: org/springframework/retry/RetryCallback
at java.lang.Class.getDeclaredConstructors0(Native Method)
at java.lang.Class.privateGetDeclaredConstructors(Class.java:2671)
at java.lang.Class.getConstructor0(Class.java:3075)
at java.lang.Class.newInstance(Class.java:412)
at org.apache.nutch.plugin.Extension.getExtensionInstance(Extension.java:161)
at org.apache.nutch.indexer.IndexWriters.<init>(IndexWriters.java:55)
at org.apache.nutch.indexer.IndexingJob.index(IndexingJob.java:121)
at org.apache.nutch.indexer.IndexingJob.run(IndexingJob.java:228)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:70)
at org.apache.nutch.indexer.IndexingJob.main(IndexingJob.java:238)
Caused by: java.lang.ClassNotFoundException: org.springframework.retry.RetryCallback
at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:335)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 10 more
I ended up seeing that the error occurred at this exact piece of code :
Object object = extensionClazz.newInstance();
Another question on SO but with different project was able to fix the issue by adding the spring-framework-messaging dependency
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-messaging</artifactId>
<version>4.2.4.RELEASE</version>
</dependency>
well i am using nutch version 1.12 with ivy for dependency management so in my config is the following:
<dependency org="org.springframework.retry" name="spring-retry" rev="1.2.0.RELEASE">
<exclude module="spring-beans"/>
<exclude module="spring-context"/>
<exclude module="spring-core"/>
<exclude module="spring-aop"/>
</dependency>
and even with adding the spring-messaging dependency it's still not working.
Any ideas?
These kind of errors might come when you have more than one version of same jar (same class) in your classpath, You can see the dependency tree by executing
<report conf="compile" /> for ivy projects
And
mvn dependency:tree for maven projects
Narrow down to the version that you want and you can exclude the other jar by explicitly excluding that jar from the module which is importing it .
No idea what went wrong but this was able to fix the problem
ant clean
ant runtime
I am using JXLS Java library to generate excel reports. I am trying to run the sample getting started tutorial (Object collection output demo). As suggested in the tutorial I am using maven to specify the required libraries in my project build configuration file. Below is the java code used
List<Employee> employees = generateSampleEmployeeData();
try(InputStream is = ObjectCollectionDemo.class.getResourceAsStream("object_collection_template1.xls")) {
try(OutputStream os = new FileOutputStream("target/" + fileName)) {
Context context = new Context();
context.putVar("employees", employees);
JxlsHelper.getInstance().processTemplate(is, os, context);
}
}
When i run the program in my eclipse i get the below exception:
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/poi/openxml4j/exceptions/InvalidFormatException
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Unknown Source)
at java.lang.Class.privateGetMethodRecursive(Unknown Source)
at java.lang.Class.getMethod0(Unknown Source)
at java.lang.Class.getMethod(Unknown Source)
at org.jxls.util.TransformerFactory.createTransformer(TransformerFactory.java:34)
at org.jxls.util.JxlsHelper.createTransformer(JxlsHelper.java:217)
at org.jxls.util.JxlsHelper.processTemplate(JxlsHelper.java:104)
at com.ucas.ObjectCollectionDemo.main(ObjectCollectionDemo.java:42)
Caused by: java.lang.ClassNotFoundException: org.apache.poi.openxml4j.exceptions.InvalidFormatException
at java.net.URLClassLoader.findClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
at java.lang.ClassLoader.loadClass(Unknown Source)
... 9 more
Below is a snapshot of the maven dependencies
Java Version: 1.8
Environment: Windows 7
IDE: Eclipse Neon
It looks like you have an issue with some XML dependencies required for Apache POI processing.
I can see them in your dependencies screenshot however for some reason they are not in effect when you are running your program. May be there is some conflict between the dependencies.
Try to create a minimal jxls project by just adding only the following two dependencies and see if it works
<dependency>
<groupId>org.jxls</groupId>
<artifactId>jxls</artifactId>
<version>2.4.0</version>
</dependency>
<dependency>
<groupId>org.jxls</groupId>
<artifactId>jxls-poi</artifactId>
<version>1.0.12</version>
</dependency>
Then you can add your own dependencies one by one and see at which point it breaks.
Not seeing very much in the way of code in your question, so I'll be shooting blanks here. It almost looks like you have a version mismatch with the file object_collection_template1.xls being created with a different version of Excel than JXLS is compatible with, at least as its written.
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)
Add a SLF4J implementation (as you only have its API):
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.26</version>
</dependency>
You have to provide one of the various SLF4J implementation .jar files in the classpath, as well as the interface .jar file. This is documented.
Download slf4j-1.7.5.zip
It holds different jar files.
Go to -> Integration folder after extracting zip and include following jar files
slf4j-api-2.0.99
slf4j-simple-1.6.99
junit-3.8.1
Right click on project properties and follow below steps Project Properties" --> "Deployment Assembly", adding "Java Build Path Entries -> Maven Dependencies
I tried other solutions and the exception didn't go away. So I decompiled the entire jose4j 0.6.5 jar with a Java Decomplier and look at its pom.xml.
I realised it has a specific dependency on slf4j-api, version 1.7.21:
So in my project's pom.xml, I added the exact same dependency, updated my Maven project so that it downloads this jar into my repository and the exception was gone.
However it may bring up another error caused by slf4j itself:
SLF4J: Failed to load class "org.slf4j.impl.StaticLoggerBinder".
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#StaticLoggerBinder for further details.
To overcome this issue, I added the following into my project's pom.xml. So altogether you need to add the following to your pom.xml and my jose4j ran without anymore issues:
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.21</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.6.4</version>
</dependency>
Remember to update your Maven project after amending your pom.xml.
(Right-click Project folder in Eclipse -> Maven -> Update Project..)
I also had the similar problem. I had a maven project and was testing rabbitmq. Firstly it showed me the similar error then I added all the SLF4J dependencies in the maven project and then error changed to "Maven SLF4J: Class path contains multiple SLF4J bindings". Here is the complete list of dependencies from pom.xlm
<dependencies>
<dependency>
<groupId>com.rabbitmq</groupId>
<artifactId>amqp-client</artifactId>
<version>4.0.0</version>
</dependency>
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.0</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.21</version>
<scope>compile</scope>
</dependency>
</dependencies>
It worked finally.
I was facing a similar issue and below line fixed the issue for me.
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
</dependency>
Edit: I realized that I was using spring boot and the version of the dependency was getting pulled from spring-boot-starter-parent.
To be more specific if you are missing the class com.vaadin.external.org.slf4j.LoggerFactory add the below dependency.
<dependency>
<groupId>com.vaadin.external.slf4j</groupId>
<artifactId>vaadin-slf4j-jdk14</artifactId>
<version>1.6.1</version>
</dependency>
If you are missing any other org.slf4j.LoggerFactory, just go to Maven central class name search and search for the exact class name to determine what exact dependency you are missing.
You can use bellow dependency
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.7</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-log4j12</artifactId>
<version>1.7.7</version>
</dependency>
Add the following jars to the class path or lib folder
slf4j-api-1.7.2.jar
slf4j-jdk14-1.7.2.jar
The perfect solution which works undoubtedly is to just add these packages to your app:
https://mvnrepository.com/artifact/org.slf4j/slf4j-api/1.7.2
http://archive.apache.org/dist/logging/log4j/1.2.16/
after adding so you may encounter following WARNING which you can simply ignore!
SLF4J: No SLF4J providers were found.
SLF4J: Defaulting to no-operation (NOP) logger implementation
SLF4J: See http://www.slf4j.org/codes.html#noProviders for further details.
credits:
https://www.javacodegeeks.com/2018/02/fix-exception-thread-main-java-lang-noclassdeffounderror-org-slf4j-loggerfactory-java.html
This error occurs because of referenced jars are not checked in our project's order and export tab.
Choose Project ->ALT+Enter->Java Build Path ->Order and Export->check necessary jar files into your project.
Finally clean your project and run.It will run successfully.
When we use the slf4j api jar, we need any of the logger implementations like log4j. On my system, we have the complete set and it works fine.
1. slf4j-api-1.5.6.jar
2. slf4j-log4j12-1.5.6.jar
3. **log4j-1.2.15.jar**
I believe the answer is outlined on the slf4j web-site (Failed to load class org.slf4j.impl.StaticLoggerBinder)
For a very quick solution I suggest adding no-operation (NOP) logger implementation (slf4j-nop.jar)
For example, if using maven:
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-nop</artifactId>
<version>${slf4j-nop-version}</version>
</dependency>
I have the same issue for zookeeper start up.
# sh /opt/zookeeper-3.4.13-1.hardtop.0.9.1/bin/zkServer.sh start-foreground
ZooKeeper JMX enabled by default
Using config: /opt/zookeeper-3.4.13-1.hardtop.0.9.1/bin/../conf/zoo.cfg
Exception in thread "main" java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
at org.apache.zookeeper.server.quorum.QuorumPeerMain.<clinit>(QuorumPeerMain.java:67)
Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
at java.net.URLClassLoader.findClass(URLClassLoader.java:387)
at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:355)
at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
... 1 more
But the class is already there as part of other slf4j jars:
# grep LoggerFactory lib/*jar
Binary file lib/log4j-1.2-api-2.17.1.jar matches
Binary file lib/log4j-slf4j-impl-2.17.1.jar matches
Binary file lib/netty-all-4.1.30.Final.jar matches
make sure your MANIFEST.MF contains the name of the referenced jar in my application was slf4j-api-*. jar.
You need slf4j-api library. For most cases only slf4j-api and slf4j-jkd14 are only required:
Here you can download the version 1.7.2:
slf4j-api-1.7.2.jar
slf4j-jkd14-1.7.2jar
If you need an example to see how these are used, refers to this tutorial:
http://www.ibm.com/developerworks/java/library/j-hangman-app/index.html
All the code for the tutorial is available
get the compatible version of this jar slf4j-jdk14 and add it as a dependency.
this solved the problem for me.
You need slf4j-api library and slf4j-log4j12-1.7.25 jar. Copy this jars in your project-> WEBINF-> lib folder and in tomcat server lib folder to execute successfully.
When you copy dependency from maven repository there is:
<scope>test</scope>
Try to remove it from dependencies in pom.xml like this.
<!-- https://mvnrepository.com/artifact/ch.qos.logback/logback-classic -->
<dependency>
<groupId>ch.qos.logback</groupId>
<artifactId>logback-classic</artifactId>
<version>1.2.3</version>
</dependency>
This works for me. I hope it would be helpful for someone else.
this worked for me /properties/maven uncheck resolve dependencies from Workspace projects.
First, check the dependency hierarchy than to exclude all slf4j jars from other dependencies and add separate slf4j as dependencies.
If it is not maven project then make sure the jar file is inside the project folder. If it is a maven project then make sure it's in the pom.xml.
use maven it will download all the required jar files for you.
in this case you need the below jar files:
slf4j-log4j12-1.6.1.jar
slf4j-api-1.6.1.jar
These jars will also depend on the cassandra version which you are running.
There are dependencies with cassandra version , jar version and jdk version you use.
You can use : jdk1.6
with : cassandra 1.1.12
and the above jars.
If you are facing java.lang.NoClassDefFoundError: org.slf4j.LoggerFactory
Add slf4j-log4j12 jar in the library folder of the project
The LoggerFactory class is msising according to the error message:
java.lang.NoClassDefFoundError: org.slf4j.LoggerFactory
Apparently, the slf4j.jar file is not getting loaded for some reason.