Paul Hübner · Oct 18, 2025
Help, My Java Object Vanished (and the GC is Not at Fault)
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Today I’m going to talk about a recent journey as a HotSpot Java Virtual Machine developer working on the OpenJDK project. While running tests for a new feature, I realized my Java objects and classes were arbitrarily disappearing! What followed was probably the most interesting debugging and fixing experience of my life (so far), which I wanted to share with the world.

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