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Why DirectMemory In Java Heap ?
See original GitHub issueI use a code without release like OutOfDirectMemoryError
when Stress test it by jmeter and see it by Jconsole.
this is a DirectMemoryError, why Heap is full and directMemory is empty?
Netty version
4.1.65
JVM version (e.g. java -version)
❯ java -version
java version "1.8.0_261"
Java(TM) SE Runtime Environment (build 1.8.0_261-b12)
Java HotSpot(TM) 64-Bit Server VM (build 25.261-b12, mixed mode)
Issue Analytics
- State:
- Created 2 years ago
- Comments:11 (5 by maintainers)
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Netty has its own memory accounting. What you see from the JMX beans is the accounting done by the JVM, but that only takes the DirectByteBuffer instances into account. In Netty, when Unsafe is available, we allocate direct memory with it, and those allocations are not counted by the JVM.
Closing this for now