How to analyze heap data from .hprof file and use it to reduce memory leaks?

There are many ways to find the root cause of a memory leak, like using a profiler such as JProfiler and simply applying what is described in this great video. You could also have a look to Eclipse Memory Analyzer also know as MAT that will be able to analyze your heap dump and propose potential causes of your memory leak as you can see in this video (you can find more information about the Suspect Report here). Another way could be to use Java Flight Recorder by applying this approach. Or using JVisualVM using the approach described in this video.