Develop Reference

java.lang.ClassNotFoundException: com.fasterxml.jackson.module.scala.experimental.ScalaObjectMapper

I am trying to run a spark job. However everytime I try to get it to run locally it fails because of
caused by: java.lang.ClassNotFoundException: com.fasterxml.jackson.module.scala.experimental.ScalaObjectMapper$class
at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
at java.lang.ClassLoader.loadClass(ClassLoader.java:419)
at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:352)
at java.lang.ClassLoader.loadClass(ClassLoader.java:352)
My Pom File includes Jackson dependencies already
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-databind</artifactId>
<version>2.11.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-annotations</artifactId>
<version>2.11.2</version>
</dependency>
<dependency>
<groupId>com.fasterxml.jackson.core</groupId>
<artifactId>jackson-core</artifactId>
<version>2.11.2</version>
</dependency>
My scala version is 2.11.12 and spark 2.4.4. Looking online, it was recommended jackson dependencies match and they do.
Any suggestions?

This solved my issue, worked like a charm!
https://programming.vip/docs/resolution-of-jackson-version-conflict-in-spark-application.html

Vertx2: org.vertx.java.platform.impl.cli.Starter

I'm writing a "Hello-World" application in Vertx2.
I have the following dependencies in pom.xml:
<dependency>
<groupId>io.vertx</groupId>
<artifactId>vertx-core</artifactId>
<version>2.1.6</version>
</dependency>
<dependency>
<groupId>io.vertx</groupId>
<artifactId>vertx-platform</artifactId>
<version>2.0.0-beta1</version>
</dependency>
and run it as IntelliJ application with the following configuration:
I get the error:
Exception in thread "main" java.lang.NoSuchMethodError:
org.vertx.java.core.impl.VertxInternal.getOrAssignContext()Lorg/vertx/java/core/impl/DefaultContext;
Do you know what is the problem here?
Edit:
This project is for Vertx version 2 (not version 3). This is why the solution in this IntelliJ and Vertx: How to run org.vertx.java.deploy.impl.cli.Starter ? doesn't resolve the issue.

I found a solution to this problem. I just changed the version numbers for vertx-core and vertx-platform, and now it works.
The new dependencies in pom.xml are:
<dependency>
<groupId>io.vertx</groupId>
<artifactId>vertx-core</artifactId>
<version>2.1RC3</version>
</dependency>
<dependency>
<groupId>io.vertx</groupId>
<artifactId>vertx-platform</artifactId>
<version>2.1.5</version>
</dependency>

Class ch.qos.logback.classic.LoggerContext does not implement the requested interface org.slf4j.ILoggerFactory

When starting the Maven Project Wizard while having installed my own plug-in, leads to this error in the console and not starting the Wizard.
Caused by: java.lang.IncompatibleClassChangeError: Class ch.qos.logback.classic.LoggerContext does not implement the requested interface org.slf4j.ILoggerFactory
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:270)
at org.slf4j.LoggerFactory.getLogger(LoggerFactory.java:281)
at org.eclipse.m2e.core.internal.MavenPluginActivator.<init>(MavenPluginActivator.java:87)
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.newInstance(Unknown Source)
at org.eclipse.osgi.internal.framework.BundleContextImpl.loadBundleActivator(BundleContextImpl.java:758)
at org.eclipse.osgi.internal.framework.BundleContextImpl.start(BundleContextImpl.java:711)
at org.eclipse.osgi.internal.framework.EquinoxBundle.startWorker0(EquinoxBundle.java:932)
at org.eclipse.osgi.internal.framework.EquinoxBundle$EquinoxModule.startWorker(EquinoxBundle.java:309)
at org.eclipse.osgi.container.Module.doStart(Module.java:581)
My research yielded in this having something to do with multiple bindings of different versions of slf4j jars? My plug-in is a maven project and the pom.xml contains the following items:
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-api</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-core</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.apache.logging.log4j</groupId>
<artifactId>log4j-slf4j-impl</artifactId>
<version>2.5</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-api</artifactId>
<version>1.7.10</version>
</dependency>
Any thoughts why the error happens or is more information needed?

I know this is an old question, but perhaps this will help someone else as they try to resolve this issue.
The IncompatibleClassChangeError error is the result of SLF4J looking for an implementation to satisfy its API interface for ILoggerFactory.
Based on the provided pom.xml file, I'd guess StaticLoggerBinder in 'log4j-slf4j-impl' is attempting to use 'logback-classic' as the implementation.
You can try to use 'slf4j-simple' as the implementation for 'slf4j-api' to resolve the issue. However, slf4j-simple logs only to std error/out.
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.7.10</version>
</dependency>

HBase Java API for HBaseTable creation shows Error

I am a beginner in Hadoop and Hbase. I am getting error when I try to create an HBase Table using Java API. My project is a maven Project. I am using cloudera machine for running my application. Code sample and error and POM.xml is given below
public static void main(String[] args) throws IOException {
// Instantiating configuration class
Configuration con = HBaseConfiguration.create();
HBaseAdmin admin = new HBaseAdmin(con);
// Instantiating table descriptor class
HTableDescriptor tableDescriptor = new HTableDescriptor(TableName.valueOf("empdata"));
// Adding column families to table descriptor
tableDescriptor.addFamily(new HColumnDescriptor("personal"));
tableDescriptor.addFamily(new HColumnDescriptor("official"));
// Execute the table through admin
admin.createTable(tableDescriptor);
System.out.println(" Table created ");
}
Command I am giving like this :
-bash-4.1$ hadoop jar HBaseTableCreation-1.0-SNAPSHOT.jar com.HBaseTable
Exception in thread "main" java.lang.NoClassDefFoundError: org/apache/hadoop/hbase/HBaseConfiguration
at com.Feathersoft.HBaseTable.main(HBaseTable.java:17)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.hadoop.util.RunJar.main(RunJar.java:212)
Caused by: java.lang.ClassNotFoundException: org.apache.hadoop.hbase.HBaseConfiguration
at java.net.URLClassLoader$1.run(URLClassLoader.java:366)
at java.net.URLClassLoader$1.run(URLClassLoader.java:355)
at java.security.AccessController.doPrivileged(Native Method)
at java.net.URLClassLoader.findClass(URLClassLoader.java:354)
at java.lang.ClassLoader.loadClass(ClassLoader.java:425)
at java.lang.ClassLoader.loadClass(ClassLoader.java:358)
... 6 more
-bash-4.1$
POM.xml dependancies
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-common</artifactId>
<version>0.98.8-hadoop2</version>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-server</artifactId>
<version>0.95.0</version>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-shell</artifactId>
<version>0.98.8-hadoop2</version>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-protocol</artifactId>
<version>0.98.8-hadoop2</version>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-thrift</artifactId>
<version>0.98.8-hadoop2</version>
</dependency>
<dependency>
<groupId>org.apache.zookeeper</groupId>
<artifactId>zookeeper</artifactId>
<version>3.4.5</version>
</dependency>
<dependency>
<groupId>com.google.protobuf</groupId>
<artifactId>protobuf-java</artifactId>
<version>2.4.0a</version>
</dependency>
<dependency>
<groupId>com.google.guava</groupId>
<artifactId>guava</artifactId>
<version>11.0.2</version>
</dependency>
<dependency>
<groupId>org.apache.hadoop</groupId>
<artifactId>hadoop-client</artifactId>
<version>2.0.0-cdh4.2.0</version>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-client</artifactId>
<version>0.98.8-hadoop2</version>
</dependency>
How can I set classpath in Cloudera Machine. I am not so much familiar in Linux.
Can any one help, It would be great ....

Kafka Quickstart: What Dependencies do I need?

I am working through the kafka quickstart:
http://kafka.apache.org/07/quickstart.html
and the basic Consumer Group example:
https://cwiki.apache.org/confluence/display/KAFKA/Consumer+Group+Example
I have coded up the Consumer and ConsumerThreadPool as above:
import kafka.consumer.KafkaStream;
import kafka.consumer.ConsumerIterator;
public class Consumer implements Runnable {
private KafkaStream m_stream;
private Integer m_threadNumber;
public Consumer(KafkaStream a_stream, Integer a_threadNumber) {
m_threadNumber = a_threadNumber;
m_stream = a_stream;
}
public void run() {
ConsumerIterator<byte[], byte[]> it = m_stream.iterator();
while (it.hasNext()) {
System.out.println("Thread " + m_threadNumber + ": " + new String(it.next().message()));
}
System.out.println("Shutting down Thread: " + m_threadNumber);
}
}
A couple of other facets: I am using spring to manage my zookeeper:
import javax.inject.Named;
import java.util.Properties;
import kafka.consumer.ConsumerConfig;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
#Configuration
#ComponentScan("com.truecar.inventory.worker.core")
public class AppConfig {
#Bean
#Named("consumerConfig")
private static ConsumerConfig createConsumerConfig() {
String zookeeperAddress = "127.0.0.1:2181";
String groupId = "inventory";
Properties props = new Properties();
props.put("zookeeper.connect", zookeeperAddress);
props.put("group.id", groupId);
props.put("zookeeper.session.timeout.ms", "400");
props.put("zookeeper.sync.time.ms", "200");
props.put("auto.commit.interval.ms", "1000");
return new ConsumerConfig(props);
}
}
And I am compiling with Maven and the OneJar Maven plugin. However, I compile and then run the resulting one jar I get the following error:
Aug 26, 2013 6:15:41 PM org.springframework.context.annotation.ClassPathScanningCandidateComponentProvider registerDefaultFilters
INFO: JSR-330 'javax.inject.Named' annotation found and supported for component scanning
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.simontuffs.onejar.Boot.run(Boot.java:340)
at com.simontuffs.onejar.Boot.main(Boot.java:166)
Caused by: java.lang.NoClassDefFoundError: scala/ScalaObject
at java.lang.ClassLoader.defineClass1(Native Method)
at java.lang.ClassLoader.defineClass(ClassLoader.java:792)
at com.simontuffs.onejar.JarClassLoader.defineClass(JarClassLoader.java:803)
at com.simontuffs.onejar.JarClassLoader.findClass(JarClassLoader.java:710)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at com.simontuffs.onejar.JarClassLoader.loadClass(JarClassLoader.java:630)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
at java.lang.Class.getDeclaredMethods0(Native Method)
at java.lang.Class.privateGetDeclaredMethods(Class.java:2521)
at java.lang.Class.getDeclaredMethods(Class.java:1845)
at org.springframework.core.type.StandardAnnotationMetadata.getAnnotatedMethods(StandardAnnotationMetadata.java:180)
at org.springframework.context.annotation.ConfigurationClassParser.doProcessConfigurationClass(ConfigurationClassParser.java:222)
at org.springframework.context.annotation.ConfigurationClassParser.processConfigurationClass(ConfigurationClassParser.java:165)
at org.springframework.context.annotation.ConfigurationClassParser.parse(ConfigurationClassParser.java:140)
at org.springframework.context.annotation.ConfigurationClassPostProcessor.processConfigBeanDefinitions(ConfigurationClassPostProcessor.java:282)
at org.springframework.context.annotation.ConfigurationClassPostProcessor.postProcessBeanDefinitionRegistry(ConfigurationClassPostProcessor.java:223)
at org.springframework.context.support.AbstractApplicationContext.invokeBeanFactoryPostProcessors(AbstractApplicationContext.java:630)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:461)
at org.springframework.context.annotation.AnnotationConfigApplicationContext.<init>(AnnotationConfigApplicationContext.java:73)
at com.truecar.inventory.worker.core.consumer.ConsumerThreadPool.<clinit>(ConsumerThreadPool.java:31)
at com.truecar.inventory.worker.core.application.Starter.main(Starter.java:20)
... 6 more
Caused by: java.lang.ClassNotFoundException: scala.ScalaObject
at com.simontuffs.onejar.JarClassLoader.findClass(JarClassLoader.java:713)
at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
at com.simontuffs.onejar.JarClassLoader.loadClass(JarClassLoader.java:630)
at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
... 27 more
Now, I know little about Kafka, and nothing about Scala. How do I fix this? What should i try next? Is this a known issue? Do I need other dependencies? Here is the kafka version in my pom.xml:
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.9.2</artifactId>
<version>0.8.0-beta1</version>
</dependency>
Update: I contacted the Kafka dev mailing list, and they let me know some specific version requirements for the scala dependencies. However, there is also an undocumented log4j dependency, which results in another runtime, not compile time, exception.
Exception in thread "main" java.lang.reflect.InvocationTargetException
Caused by: java.lang.NoSuchMethodError: ch.qos.logback.classic.Logger.filterAndLog(Ljava/lang/String;Lorg/slf4j/Marker;Lch/qos/logback/classic/Level;Ljava/lang/String;[Ljava/lang/Object;Ljava/lang/Throwable;)V
at org.apache.log4j.Category.log(Category.java:333)
at org.apache.commons.logging.impl.Log4JLogger.debug(Log4JLogger.java:177)
Another Update:
I found the correct log4j dependency:
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
But now I am met with an even more cryptic runtime exception:
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.simontuffs.onejar.Boot.run(Boot.java:340)
at com.simontuffs.onejar.Boot.main(Boot.java:166)
Caused by: java.lang.NoClassDefFoundError: org/I0Itec/zkclient/IZkStateListener
at kafka.javaapi.consumer.ZookeeperConsumerConnector.<init>(ZookeeperConsumerConnector.scala:64)
at kafka.javaapi.consumer.ZookeeperConsumerConnector.<init>(ZookeeperConsumerConnector.scala:66)
at kafka.consumer.Consumer$.createJavaConsumerConnector(ConsumerConnector.scala:100)
at kafka.consumer.Consumer.createJavaConsumerConnector(ConsumerConnector.scala)
At this point I got the WTF kind of feeling. So I added another dependency:
<dependency>
<groupId>com.101tec</groupId>
<artifactId>zkclient</artifactId>
<version>0.3</version>
</dependency>
But this exposed yet another runtime exception:
Exception in thread "main" java.lang.reflect.InvocationTargetException
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at com.simontuffs.onejar.Boot.run(Boot.java:340)
at com.simontuffs.onejar.Boot.main(Boot.java:166)
Caused by: java.lang.NoClassDefFoundError: com/yammer/metrics/core/Gauge
at kafka.consumer.ZookeeperConsumerConnector.createFetcher(ZookeeperConsumerConnector.scala:146)
at kafka.consumer.ZookeeperConsumerConnector.<init>(ZookeeperConsumerConnector.scala:113)
at kafka.javaapi.consumer.ZookeeperConsumerConnector.<init>(ZookeeperConsumerConnector.scala:64)
at kafka.javaapi.consumer.ZookeeperConsumerConnector.<init>(ZookeeperConsumerConnector.scala:66)
at kafka.consumer.Consumer$.createJavaConsumerConnector(ConsumerConnector.scala:100)
at kafka.consumer.Consumer.createJavaConsumerConnector(ConsumerConnector.scala)
I am hoping to be able to get this baby example up and running, but maybe this is the price to pay for using beta products? Maybe I should switch to Apache Active MQ. But that sounds less fun. Am I missing something?

The problem is that kafka beta was built in a way that pom generated with a jar isn't valid and maven could not recognize it and parse properly, thus fetching transitive dependencies. We've managed to mitigate this problem by enlisting all of the dependencies from that pom (scala, zk, etc) in our pom definition. We're waiting for next beta builds of kafka, in which problem will be fixed.
Full dependencies list is below. Note that you have to change scala version dependency accordingly to the postfix of your kafka artifact.
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>2.8.0</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.15</version>
<exclusions>
<exclusion>
<groupId>com.sun.jmx</groupId>
<artifactId>jmxri</artifactId>
</exclusion>
<exclusion>
<groupId>com.sun.jdmk</groupId>
<artifactId>jmxtools</artifactId>
</exclusion>
<exclusion>
<groupId>javax.jms</groupId>
<artifactId>jms</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>net.sf.jopt-simple</groupId>
<artifactId>jopt-simple</artifactId>
<version>3.2</version>
</dependency>
<dependency>
<groupId>org.slf4j</groupId>
<artifactId>slf4j-simple</artifactId>
<version>1.6.4</version>
</dependency>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-compiler</artifactId>
<version>2.8.0</version>
</dependency>
<dependency>
<groupId>com.101tec</groupId>
<artifactId>zkclient</artifactId>
<version>0.3</version>
</dependency>
<dependency>
<groupId>com.yammer.metrics</groupId>
<artifactId>metrics-core</artifactId>
<version>2.2.0</version>
</dependency>
<dependency>
<groupId>com.yammer.metrics</groupId>
<artifactId>metrics-annotation</artifactId>
<version>2.2.0</version>
</dependency>
<dependency>
<groupId>org.easymock</groupId>
<artifactId>easymock</artifactId>
<version>3.0</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.scalatest</groupId>
<artifactId>scalatest</artifactId>
<version>1.2</version>
<scope>test</scope>
</dependency>
As for the
Maybe I should switch to Apache Active MQ. But that sounds less fun.
Am I missing something?
Well, don't you forget that this is the beta release? Some bad things are happening, indeed, but currently we're running kafka 0.7 without any efforts.

I found this configuration of dependencies to be functional:
<dependencies>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-core</artifactId>
<version>3.2.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-context</artifactId>
<version>3.2.4.RELEASE</version>
</dependency>
<dependency>
<groupId>org.apache.kafka</groupId>
<artifactId>kafka_2.9.2</artifactId>
<version>0.8.0-beta1</version>
</dependency>
<dependency>
<groupId>javax.inject</groupId>
<artifactId>javax.inject</artifactId>
<version>1</version>
</dependency>
<dependency>
<groupId>org.scala-lang</groupId>
<artifactId>scala-library</artifactId>
<version>2.9.2</version>
</dependency>
<dependency>
<groupId>log4j</groupId>
<artifactId>log4j</artifactId>
<version>1.2.17</version>
</dependency>
<dependency>
<groupId>com.101tec</groupId>
<artifactId>zkclient</artifactId>
<version>0.3</version>
</dependency>
<dependency>
<groupId>com.yammer.metrics</groupId>
<artifactId>metrics-core</artifactId>
<version>2.2.0</version>
</dependency>
</dependencies>

This seems to work :
$ git clone https://github.com/buildlackey/cep
$ cd cep/kafka-0.8.x
$ mvn package
$ mvn exec:java -Dexec.mainClass=TestKafkaProducer
(via where can I find maven repository for kafka? )