Should java/nio/channels/spi/ be synchronized ?

Alan Bateman Alan.Bateman at
Tue Dec 4 06:13:16 PST 2012

On 04/12/2012 10:53, Sean Chou wrote:
> Hello,
> I found AbstractInterruptibleChannel.close() is synchronized 
> using closeLock, but isOpen() is not synchronized. Javadoc 
> of isOpen() says "Returns: true if, and only if, this channel is 
> open". I want to know if isOpen() method is designed not to 
> synchronize with closeLock ? Because in close() method the closeLock 
> embraces "open = false;" and " implCloseChannel(); " , which looks 
> like the open variable should always reflect the real state.
What problem are you running into? I see anything wrong with isOpen and 
it would create a lot of issues if it were to synchronize on closeLock.


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