Application Profiling & Debugging

Java Flight Recorder is a profiling and event collection framework built into the Oracle JDK. Java Mission Control is an advanced set of tools that enables efficient and detailed analysis of the extensive of data collected by Java Flight Recorder. Example configuration:

If you encounter OutOfMemoryExceptions with your Flink application, then it is a good idea to enable heap dumps on out of memory errors.

Memory usage and garbage collection can have a profound impact on your application. The effects can range from slight performance degradation to a complete cluster failure if the GC pauses are too long. If you want to better understand the memory and GC behaviour of your application, then you can enable memory logging on the TaskManagers.