NSStream streamError 57 - Socket is not connected happening intermittently and consistently

Question

After making some changes to my app for iOS 6 (none of them actually pertaining to networking), I started encountering a strange error with my stream event handler. This is occurring on both iOS 5 and iOS 6, however much more frequently on iOS 5. This error occurs every 50 seconds or so, my stream event handler encounters NSStreamEventErrorOccurred. The error information is as follows:

Application[6370:707] Error Occured with stream [<__NSCFInputStream: 0xd622ab0>]
Application[6370:707] Stream Status: 7
Application[6370:707] Error Code: 57
Application[6370:707] Error Desc: The operation couldn’t be completed. Socket is not connected
Application[6370:707] Error Reason: Socket is not connected
Application[6370:707] Error Domain: NSPOSIXErrorDomain

Following this error, the handler will encounter a couple 'Connection Reset by Peer' TCP errors, which I believe to be caused by the server sending an RST Packet. Is there any other scenario that can cause this error? My app is connecting to a hardware device that broadcasts a wifi network in AP mode.

The following is my code for the NSStreamEventHasBytesAvailable event.

case NSStreamEventHasBytesAvailable: {
    NSLog(@"Stream has bytes available! Stream is %@", stream);
    if (stream == iStream)
    {
        @try {

            uint8_t buf[2048];
            unsigned int len = 0;

            len = [(NSInputStream *)stream read:buf maxLength:2048];
            if(len) {    
                NSString *incomingData = [[NSString alloc] initWithBytes:(const void *)buf length:len encoding:NSUTF8StringEncoding];
            }
        } catch (NSException *e) {
            NSLog(@"Caught Exception: %@",e);
        }
    }
    break;
}

Please request information as needed, thank you for your time!

Grower