Problems persist in KQueueSelectorProvider (Mac) in 7u6 ea

[Alan Bateman]

On 17/08/2012 22:43, Jason T. Greene wrote:
>
> Sleep and yield don't seem to prevent the dup2 issue, so there must be 
> something more complex going on. For whatever reason I have yet to 
> trigger it with the setInterest patch
>
> Here is the kernel stack:
Thanks for checking, it does appear that something else is going on. It 
would be really useful if you could create a standalone test case that 
duplicates it (don't know if that is possible as I assume you are seeing 
this in conjunction with lots of middleware).

>
> Ok I have tested this very thoroughly, and I think it's ready for 
> submission. This includes jdk 6 (snow leopard, lion, mountain lion) 
> and 7 (lion, mountain lion). I also ran through the nio selector 
> tests, all pass.
>
> What process should I follow?
Thanks for testing in all environments (I'm surprised that it works with 
6 as we have made several changes to this code since the the original 
Apple contribution). For process then you need a sponsor to commit it 
for you so I will do that for you, hopefully this week, I just need to 
spend a bit of time to look at it more closely.

>
> A potential change that could be made, that I think should be left for 
> the future should perf testing ever show it's importance, is that the 
> kqueue change list could be combined into one syscall, instead of a 
> list of N syscalls.
>
Yes, I think that would be a good improvement but it does not need to be 
in this patch. We do in /dev/poll Selector so you might get some ideas 
there.

So thanks for the bug report and patch, I will get back to you soon.

-Alan