method not found error while accessing web service using asihttprequest

Question

I've created SOAP web service that would be accessible from Objective-C environment with ASIHTTPRequest library using JSON-RPC bridge . When I tested it from JavaScript everything where OK. But from Objective-C I got an error

 {"id":2,"error":{"code":591,"msg":"method not found (session may have timed out)"}}

Web Service:

@WebService() 
public class UserWS {

/**
 * User data list - id, first name, last name, service number, username
 */
/**
 * Provides web service to get current user with waiter role data.
 */
@WebMethod(operationName = "getUsers")
public String[][] getUsers() {
    String[][] userDara = null;
    try {
        Context context = POSNamingService.getContext();
        Users us = (Users) context.lookup("business.Users");
        List<User> users = us.getWaiterUsers();
        userDara = new String[users.size()][5];
        for (int i = 0; i < userDara.length; i++) {
            User user = users.get(i);
            userDara[i][0] = String.valueOf(user.getUserNo());
            userDara[i][1] = user.getFirstName();
            userDara[i][2] = user.getLastName();
            userDara[i][3] = user.getServiceNo();
            userDara[i][4] = user.getLogin();
        }
    } catch (NamingException ex) {
        Logger.getLogger(UserWS.class.getName()).log(Level.SEVERE, null, ex);
    }
    return userDara;
}

Bridge class:

public class Bridge {

private UserWS userWS = new UserWS();

public String[][] getUsers(int i) {
    return userWS.getUsers();
}

Objecitive-C side:

(IBAction)clickDownloadButton:(id)sender {
NSURL *url = [NSURL URLWithString:@"http://10.200.0.24:1445/TestRPC-war/JSONRPC"];
ASIHTTPRequest *request = [[[ASIHTTPRequest alloc] initWithURL:url] autorelease];
NSString *sendData = [NSString stringWithFormat:@"{\"method\": \"getUsers\"}"];
request appendPostData:[sendData dataUsingEncoding:NSUTF8StringEncoding]];
[request setRequestMethod:@"GET"];
[request setDelegate:self];
[request setDidFailSelector:@selector(requestWentWrong:)];
[request setTimeOutSeconds:60]; 
[request startAsynchronous];
}

Answer 1

Your ASIHTTPRequest instance request is autoreleased. That means that it will be deallocated pretty much as soon as your -clickDownloadButton: method ends, which is probably terminating your session early.

Instead, you should make request an instance variable, allocate it within your method here (but don't autorelease it), then release it when the request has completed.