Beyond the Security Manager: JEP 484 and the Rise of the 'Clean Room' Pattern Now that the Security Manager is a fossil of the past, we've entered the Wild West of AI-generated bytecode execution. If you're letting an LLM write "glue code" for your data pipelines and running it without JEP 484-driven instrumentation, you're one prompt-injection away from a total system compromise. Want to go deeper? javalld.com — machine coding interview problems with working Java code and full execution traces. Why Most Developers Get This Wrong The Container Fallacy: Relying on OS-level containers for isolation adds 200ms of latency per execution when you only need a 5ms data transform. It’s overkill for logic and under-kill for throughput. The Thread.stop() Delusion: Thinking Thread.interrupt() will kill a runaway agent-generated loop. Malicious or poorly formed AI code can easily ignore interrupts, leading to CPU exhaustion.…