Hi everybody, I found a memory leak caused by a misuse of the DefaultHapiContext. To keep it short, we were creating many different DefaultHapiContext using the default constructor: HapiContext ctx = new DefaultHapiContext();
This caused a memory leak! The instances of DefaultHapiContext are not collected by the garbage collector since they are referenced by the ApplicationShutdownHook! I found that when calling new DefaultHapiContext(), HAPI creates a default ExecutorService which is then registered to the shutdown hook. This happens when the getExecutorService() is called. I don't know if this needs to get fixed (in the code or in the javadoc), but at least I wanted to share with you this problem. We solved the problem passing a custom ExecutorService to the DefaultHapiContext constructor.
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