THIS IS A TEST INSTANCE. ALL YOUR CHANGES WILL BE LOST!!!!
A parser takes an input, which is usually a byte array coming from the Kafka Spout, and turns it into a Metron JSON Object. The Grok parser does this by utilizing the Grok library inside of the Parser Kafka Bolt Adapter. So instead of coding the parser in Java, the Grok Adapter allows for creating Grok Statements, outputs of which is understood by the Storm Bolt, which turns it into a JSON. For more information on the Grok parser please refer to the following file.