Michael Kopaniov questions

Michael Kopaniov answers

• What is ElasticSearch-Hadoop (es-hadoop) and its benefit over HBase for a live web application?
• how to filter out a null value from spark dataframe
• Drop first row of Spark DataFrame
• Spark Streaming textFileStream not supporting wildcards
• How to save latest offset that Spark consumed to ZK or Kafka and can read back after restart