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https://openjdk.org/jeps/444#Pinning
There are two scenarios in which a virtual thread cannot be unmounted during blocking operations because it is pinned to its carrier:
When it executes code inside a synchronized block or method, or
When it executes a native method or a foreign function.
第一个坑： https://openjdk.org/jeps/491 ，首个解决此问题的 JDK LTS 版本是 25 。
第二个坑：目前没有办法根治，知名库如 netty 的 native 代码应该能比较快发现和解决。
所以还是再等等吧，反正已经用上 Kotlin 协程了，等 virtual threads 成熟了拿来当阻塞 IO 的 dispatcher 用
Executors.newVirtualThreadPerTaskExecutor().asCoroutineDispatcher() |
