Hi.

I'm developing a web server application using threads and sockets. It's quite
simple but it throws "Error: Access Violation" and stops responding for
incoming connections very frequently. When it occurs I have to Ctrl-C the
server and restart to continue its work. I've put tons of debug info to trace
the error but I've found no order on where it throws. So for a try I disabled
the GC and now it works as it should.
Why does this happen? How could I re-enable the GC (memory consuming is
increasing by every connection) without having to fear of Access Violation errors?

Regards,
Nahon

Nahon wrote:
> Hi.
> 
> I'm developing a web server application using threads and sockets. It's quite
> simple but it throws "Error: Access Violation" and stops responding for
> incoming connections very frequently. When it occurs I have to Ctrl-C the
> server and restart to continue its work. I've put tons of debug info to trace
> the error but I've found no order on where it throws. So for a try I disabled
> the GC and now it works as it should.
> Why does this happen? How could I re-enable the GC (memory consuming is
> increasing by every connection) without having to fear of Access Violation errors?
> 
> Regards,
> Nahon

Access Violations can be caused by a few things.  One of these is attempting to use a null object, but it doesn't sound like that.  The other is attempting to use an object that's been deleted.

D's GC should never delete an object you still have a reference to; are you deleting objects manually?  If so, that could be your problem: you're deleting an object and then trying to use it again.

It's really the only thing I can think of at the moment; sorry.

	-- Daniel

-- 
Unlike Knuth, I have neither proven or tried the above; it may not even make sense.

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Daniel Keep wrote:
> 
> Nahon wrote:
>> Hi.
>>
>> I'm developing a web server application using threads and sockets. It's quite
>> simple but it throws "Error: Access Violation" and stops responding for
> 
> Access Violations can be caused by a few things.  One of these is
> attempting to use a null object, but it doesn't sound like that.  The
> other is attempting to use an object that's been deleted.
> 

Could also be because you're passing D char[]'s to C functions that expect char*.  Any time you call a C function that takes a string, you need to call toStringz() on it.

--bb