Kafka Delete Topic and its messages
Kafka Delete Topic - Every message Apache Kafka receives stores it in log and by…
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January 25, 2019
How to Setup a Kafka Cluster (step-by-step)
This article provides step by step instructions on how to install, setup, and run Apache…
January 11, 2019
Spark Step-by-Step Setup on Hadoop Yarn Cluster
This post explains how to setup Apache Spark and run Spark applications on the Hadoop…
January 10, 2019
Kafka consumer and producer example with a custom serializer
Kafka allows us to create our own serializer and deserializer so that we can produce and consume different data types like Json, POJO e.t.c. In this post will see how to produce and consumer User pojo object. To stream pojo objects one need to create custom serializer and deserializer.
January 4, 2019
Apache Kafka Producer and Consumer in Scala
This article explains how to write Kafka Producer and Consumer example in Scala. Producer sends messages to Kafka topics in the form of records, a record is a key-value pair along with topic name and consumer receives a messages from a topic.
January 4, 2019
Cassandra : java.lang.RuntimeException: Unable to gossip with any peers
If you are getting below exception while setting up Cassandra cluster, please follow below steps…
January 4, 2019
Spark – Create a SparkSession and SparkContext
In Spark or PySpark SparkSession object is created programmatically using SparkSession.builder() and if you are…
December 17, 2018
WARNING: “HADOOP_PREFIX has been replaced by HADOOP_HOME. Using value of HADOOP_PREFIX.
Are you getting WARNING: "HADOOP_PREFIX has been replaced by HADOOP_HOME. Using value of HADOOP_PREFIX. ? for every command you issue on a cluster, follow below step to resolve it.
December 9, 2018
Incompatible clusterIDs error in datanode logs
When your datanodes are not starting due to java.io.IOException: Incompatible clusterIDs error, means you have formatted namenode with out deleting files from datanode.
December 9, 2018
Create a Spark RDD using Parallelize
Let's see how to create Spark RDD using sparkContext.parallelize() method and using Spark shell and…
December 4, 2018
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