Hello all, I have written following code: Code: NSURL *theURL = [NSURL URLWithString:strURL]; NSMutableURLRequest *theRequest = [NSMutableURLRequest requestWithURL:theURL cachePolicy:NSURLRequestReloadIgnoringCacheData timeoutInterval:10.0f]; [theRequest setHTTPMethod:@"POST"]; [theRequest setHTTPBody:streamBuffer]; NSURLResponse *theResponse; NSError *theError; NSData *theResponseData = [NSURLConnection sendSynchronousRequest:theRequest returningResponse:&theResponse error:&theError]; But i got a memory leak when execution completes. These are two memory leaks that i don't able to understand: 1. NSMachPort 2. CFRunLoopSource Any body have any idea about this, please let me know. thanks in advance.