This document provides guidance on reporting bugs in the Apache Hadoop project. It explains that the JIRA issue tracker is used to report bugs and feature requests, and outlines best practices for submitting high-quality issue reports. These include searching for existing issues and solutions first, providing detailed steps to replicate the problem, and attaching relevant logs and stack traces. The document discourages "help!" emails and stresses that the best way to get a bug fixed is often for the reporter to propose a patch with tests.