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Java ReentrantReadWriteLock 同一个线程先 readlock, 再 witelock 死锁 - dead lock

本文主要是介绍Java ReentrantReadWriteLock 同一个线程先 readlock, 再 witelock 死锁 - dead lock，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

 

Refr to https://josephmate.github.io/2020-02-24-deadlock-who-owns-the-lock/

 

What I Learned

  1. Locking a readlock, then locking the write lock on the same lock creates a deadlock.
  2. Deadlocks created using locks instead of monitors does not appear in thread dumps (like those created by kill -3 (linux) or Ctrl+Break (windows)).
  3. Keep digging and you’ll uncover a nasty incorrect assumption you’ve been making.
  4. -XX:+PrintConcurrentLocks detects some deadlocks
  5. -XX:+PrintConcurrentLocks does not print reentrant locks on stack traces
  6. -XX:+PrintConcurrentLocks does not detect acquiring read then write lock in the same thread deadlock
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