Best practices for preventing Java OutOfMemoryError

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Java Finalization Queue: How finalize(), Weak/Phantom References, and Cleaner Impact Heap OOME
The article discusses Java's resource cleanup mechanisms, highlighting issues with finalizers, which are deprecated due to their unreliability. It contrasts phantom references and cleaners, introduced in Java 9, emphasizing the complexities of using them properly. The preferred method for resource management is implementing the AutoCloseable interface with try-with-resources for simplicity and reliability.
Optimizing Java Direct Buffer Memory: The NIO/WebClient Performance Trade-off
The article discusses how a Java application can encounter OutOfMemoryError due to excessive direct buffer memory usage, which is often overlooked during monitoring. It highlights the distinction between heap and direct buffer memory, the performance benefits of using direct buffers, and offers solutions for detection and tuning to prevent memory leaks, especially in containerized environments.
Heap Pollution: Comparing Memory Models of Reactive Streams vs. Virtual Threads
The discussion evaluates whether Java's Virtual Threads technology leads to heap pollution. It clarifies that, by the most accepted definition, virtual threads do not cause heap pollution. Additionally, it compares memory usage between virtual threads and CompletableFuture, concluding that virtual threads improve memory efficiency and scalability without leading to heap pollution concerns.