Hadoop is a widely-used Big Data tool. The Hadoop market revenue is expected to expand at a CAGR of 23% from 2017 to 2023. Although it is known for its many advantages, it also suffers from various limitations. Some of these include slow processing speeds, issues with small-sized data, no real-time data processing, low efficiency for iterative processing, and missing encryption at storage and network levels. Despite the limitations, Hadoop is thriving in the Big Data world, with its market expected to reach USD 340 billion by 2027.