qsjh898
qsjh898
采纳率40%
2016-02-25 11:42 阅读 1.7k

Mina框架死锁检测算法的原理?

30

private void checkDeadLock() {
if (!(this instanceof CloseFuture || this instanceof WriteFuture || this instanceof ReadFuture || this instanceof ConnectFuture)) {
return;
}
StackTraceElement[] stackTrace = Thread.currentThread().getStackTrace();

    // Simple and quick check.
    for (StackTraceElement s : stackTrace) {
        if (AbstractPollingIoProcessor.class.getName().equals(s.getClassName())) {
            IllegalStateException e = new IllegalStateException("t");
            e.getStackTrace();
            throw new IllegalStateException("DEAD LOCK: " + IoFuture.class.getSimpleName()
                    + ".await() was invoked from an I/O processor thread.  " + "Please use "
                    + IoFutureListener.class.getSimpleName() + " or configure a proper thread model alternatively.");
        }
    }

    // And then more precisely.
    for (StackTraceElement s : stackTrace) {
        try {
            Class<?> cls = DefaultIoFuture.class.getClassLoader().loadClass(s.getClassName());
            if (IoProcessor.class.isAssignableFrom(cls)) {
                throw new IllegalStateException("DEAD LOCK: " + IoFuture.class.getSimpleName()
                        + ".await() was invoked from an I/O processor thread.  " + "Please use "
                        + IoFutureListener.class.getSimpleName()
                        + " or configure a proper thread model alternatively.");
            }
        } catch (Exception cnfe) {
            // Ignore
        }
    }
}

这是Mina框架DefaultIoFuture中检测死锁的算法,有大神可以解释一下原理是什么吗?为什么在当前线程堆栈中调用了AbstractPollingIoProcessor就会造成死锁?
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