Strange Exception at read

[Vikram A]

>> in windows, WSA use some error code scopes. 5 is a windows common
>>error. I not think it in aio scope.

i think, windows error 0x05 is not windows specific.
it is a general x86 line read write error, can even happen during
windows/solaris x86 installation, if it encounters a problem.

rgds,
Vikram.



On Thu, Nov 12, 2009 at 8:03 PM, 向雅 <fyaoxy at gmail.com> wrote:

> I not family with other part howto wrap the os error.
> Just in this case, Indeed I cannot take any action to cover it.
> I checked out sun.nio.fs.WindowsException which do some exception
> wrap. I think sun.nio.ch maybe need some same like thing.
> My question is :
> If both do wrap, so whether can unify these wrap?
>
> WindowsException:
>  private IOException translateToIOException(String file, String other) {
>        // not created with last error
>        if (lastError() == 0)
>            return new IOException(errorString());
>
>        // handle specific cases
>        if (lastError() == ERROR_FILE_NOT_FOUND || lastError() ==
> ERROR_PATH_NOT_FOUND)
>            return new NoSuchFileException(file, other, null);
>        if (lastError() == ERROR_FILE_EXISTS || lastError() ==
> ERROR_ALREADY_EXISTS)
>            return new FileAlreadyExistsException(file, other, null);
>        if (lastError() == ERROR_ACCESS_DENIED)
>            return new AccessDeniedException(file, other, null);
>
>        // fallback to the more general exception
>        return new FileSystemException(file, other, errorString());
>    }
>
> BTW, I think, for those os error not in given domain, whether wrap to
> RuntimeException subclass.
> in windows, WSA use some error code scopes. 5 is a windows common
> error. I not think it in aio scope.
> And in the callback mode, failed method already hide the exception
> type. Pass a RuntimeException no any difference.
> So we can tell user in API doc, failed method's exc parameter maybe
> unchecked, maybe checked.
> unchecked exception in the failed method indicate that some true
> exception occurs.
>
> 致敬
> 向雅
>
>
>
> 2009/11/12 Alan Bateman <Alan.Bateman at sun.com>:
> > 向雅 wrote:
> >>
> >> :
> >> Yes,
> >> for example the IOException in this message, I got a "IOException:
> >> Access Denied".
> >> I debug to Iocp get the os errno: 5, windows system error number.
> >> I tested aio File channel, I get the errno 5 again, but it wrapped
> >> with AccessDeniedException.
> >> So I browsed the new file channel implementation, besides
> >> AccessDeniedException,
> >> there have more specific exception.
> >>
> >
> > The "Access denied" issue that you ran into with the Windows 7 firewall
> is,
> > in my mind anyway, obscure and probably impossible to differentiate from
> a
> > serious implementation bug. It's also not clear to me what recovery
> action
> > you could take that would be different to other I/O errors. The only case
> > that I think we should add a specific exception for is the "reset by
> peer"
> > case (that applies to SocketChannel and legacy Socket aswell).
> >
> > -Alan.
> >
>
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