I am trying to deploy a my storm topology on cluster. I am using kafka as the input(kafka Spout).This is the error i am getting java.lang.NoClassDefFoundError: Could not initialize class org.apache.log4j.Log4jLoggerFactory at org.apache.log4j.Logger.getLogger(Logger.java:39) at kafka.utils.Logging$class.logger(Logging.scala:24) at kafka.consumer.SimpleConsumer.logger$lzycompute(SimpleConsumer.scala:35) at kafka.consumer.SimpleConsumer.logger(SimpleConsumer.scala:35) at kafka.utils.Logging$class.info(Logging.scala:75) at kafka.consumer.SimpleConsumer.info(SimpleConsumer.scala:35) at kafka.consumer.SimpleConsumer.liftedTree1$1(SimpleConsumer.scala:94) at kafka.consumer.SimpleConsumer.kafka$consumer$SimpleConsumer$$sendRequest(SimpleConsumer.scala:83) at kafka.consumer.SimpleConsumer.getOffsetsBefore(SimpleConsumer.scala:149) at kafka.javaapi.consumer.SimpleConsumer.getOffsetsBefore(SimpleConsumer.scala:79) at org.apache.storm.kafka.KafkaUtils.getOffset(KafkaUtils.java:75) at org.apache.storm.kafka.KafkaUtils.getOffset(KafkaUtils.java:65) at org.apache.storm.kafka.PartitionManager.<init>(PartitionManager.java:94) at org.apache.storm.kafka.ZkCoordinator.refresh(ZkCoordinator.java:98) at org.apache.storm.kafka.ZkCoordinator.getMyManagedPartitions(ZkCoordinator.java:69) at org.apache.storm.kafka.KafkaSpout.nextTuple(KafkaSpout.java:129) at org.apache.storm.daemon.executor$fn__6505$fn__6520$fn__6551.invoke(executor.clj:651) at org.apache.storm.util$async_loop$fn__554.invoke(util.clj:484) at clojure.lang.AFn.run(AFn.java:22) at java.lang.Thread.run(Thread.java:745) My pom.xml looks like this:- <dependencies> <dependency> <groupId>org.apache.storm</groupId> <artifactId>storm-hdfs</artifactId> <version>1.0.1</version> <exclusions> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </exclusion> <exclusion> <groupId>log4j</groupId> <artifactId>log4j</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.kafka</groupId> <artifactId>kafka_2.10</artifactId> <version>0.9.0.1</version> <exclusions> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </exclusion> <exclusion> <groupId>log4j</groupId> <artifactId>log4j</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.kafka</groupId> <artifactId>kafka-clients</artifactId> <version>0.9.0.1</version> <exclusions> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </exclusion> <exclusion> <groupId>log4j</groupId> <artifactId>log4j</artifactId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.storm</groupId> <artifactId>storm-kafka</artifactId> <version>1.0.1</version> </dependency> <dependency> <groupId>org.apache.storm</groupId> <artifactId>storm-core</artifactId> <scope>provided</scope> <version>1.0.1</version> </dependency> <!-- https://mvnrepository.com/artifact/org.apache.hadoop/hadoop-auth --> <dependency> <groupId>org.apache.hadoop</groupId> <artifactId>hadoop-auth</artifactId> <version>2.2.0</version> </dependency> <dependency> <groupId>org.apache.storm</groupId> <artifactId>storm-redis</artifactId> <version>1.0.1</version> <exclusions> <exclusion> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> </exclusion> <exclusion> <groupId>log4j</groupId> <artifactId>log4j</artifactId> </exclusion> </exclusions> </dependency> </dependencies> ... View more