NetworkChannel.getOption(...) throws java.lang.AssertionError: Option not found

[Norman Maurer]

Just to add some more informations, this also happens on Linux.

To workaround this I opened the following PR in netty:

https://github.com/netty/netty/pull/8183 <https://github.com/netty/netty/pull/8183>

Let me know if you need any more infos or if I should open a bug-report.

Bye
Norman


> On 8. Aug 2018, at 19:18, Norman Maurer <norman.maurer at googlemail.com> wrote:
> 
> Hi,
> 
> I just wanted to double check that I am not doing something wrong here.
> 
> This code will throw an java.lang.AssertionError: Option not found :
> 
> 
> public static void main(String[] args) throws IOException {
>     getAllSupportedOptions(DatagramChannel.open());
>     getAllSupportedOptions(SocketChannel.open());
>     getAllSupportedOptions(ServerSocketChannel.open());
> }
> 
> private static void getAllSupportedOptions(NetworkChannel channel) throws IOException {
>     try {
>         for (SocketOption<?> option : channel.supportedOptions()) {
>             channel.getOption(option);
>         }
>     } finally {
>         channel.close();
>     }
> }
> 
> 
> It throws for ServerSocketChannel. The option that throws here is IP_TOS which is returned by supportedOptions().
> 
> We recently got this reported in netty where we make use of such a pattern:
> 
> https://github.com/netty/netty/issues/8182 <https://github.com/netty/netty/issues/8182>
> 
> If this sounds like a bug (I am very confident it is one) I can create an issue. 
> 
> This happens on latest java8, 9, 10 and 11 on MacOS. I did not test Linux yet.
> 
> As a side-note it would be nice if the AssertionError would have included the option for which it throws.
> 
> Thanks,
> Norman
> 
> 
> 
> 

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