ios - Domain=NSURLErrorDomain Code=-1021 "request body stream exhausted"

Question

I am getting the NSURLErrorDomain Code=-1021 "request body stream exhausted"

NSLocalizedDescription=request body stream exhausted, NSUnderlyingError=0x2088c080 "request body stream exhausted"}

This error is generated when uploading multiple big size images I am using AFNetworking and tried to search for a fix online, but didn't succeed

NSDictionary *clientUniqueId = [NSDictionary dictionaryWithObject:NSLocalizedString(uniqueDrId, nil) forKey:@"clientUniqueId"];
NSMutableURLRequest *request = [client multipartFormRequestWithMethod:@"POST"
                                                                 path:pendingUpload.urlPath
                                                           parameters:clientUniqueId
                                            constructingBodyWithBlock:^(id<AFMultipartFormData> formData)
                                {
                                    [formData appendPartWithFormData:[pendingUpload dataRecordData] name:@"dr"];
                                    NSArray *attachments = pendingUpload.attachments;
                                    if (attachments != nil) {
                                        for (Attachment *attachment in attachments) {


                                            [formData appendPartWithFileData:attachment.data
                                                                        name:attachment.key
                                                                    fileName:attachment.filename
                                                                    mimeType:attachment.contentType];


                                        }
                                    }

                                }];