NSPOSIXErrorDomain Code=12 “Cannot allocate memory” in 3G network

Question

I\'m trying to send a file on FTP server in my iPhone application. Everything seems to be okay in WiFi and GSM:EDGE network, but in 3G network an error appears (not always, but

Answer 1

Have resolved this error with using operation for request (NSMutableUrlConnection) with @autorelease{} for main function

- (void)main
 NSURLConnection* connection;
    @autoreleasepool //urgently needed for 3G upload
    {

        self.currentRequest = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"test.php"]];
        [self.currentRequest setHTTPMethod:@"PUT"];

        [self.currentRequest setHTTPBody:self.data];//inpustStream doesn't work

        connection = [NSURLConnection connectionWithRequest:self.currentRequest delegate:self];
        [connection start];

    }//end autorelease pool

        do 
        {

            [[NSRunLoop currentRunLoop] runMode: NSDefaultRunLoopMode beforeDate: [NSDate distantFuture]];
            if ([self isCancelled])
            {
                connection          = nil;
                isFailed = YES;
                break;
            }
            self.status(statusUpdateMessage);
        } 
        while (!isFailed && !isCompleted);
        [timer invalidate];//test
        timer = nil;

//corresponding of status via blocks
        self.completed(!isFailed);
        self.status(isFailed ? errorMessage : @"Completed");
        if (isFailed)
        {
            self.failed(errorMessage != nil ? errorMessage : @"Undefined error");
        }

        self.data = nil;
        self.currentRequest = nil;

        connection = nil;

}

Answer 2

And here it is - the solution (or rather workaround):

you should set property of writeStream to false, to switch off default persistant connection

CFWriteStreamSetProperty( (CFWriteStreamRef)writeStreamRef, kCFStreamPropertyFTPAttemptPersistentConnection, kCFBooleanFalse ) ;