The remote server returned an error: (429).

Question

Hello! I have 3 services in my company. All services work with one service account and sometime I catch error:
The remote server returned an error: (429). Stack: at System.Net.HttpWebRequest.GetResponse() at Microsoft.SharePoint.Client.SPWebRequestExecutor.Execute() at Microsoft.SharePoint.Client.ClientRequest.ExecuteQueryToServer(ChunkStringBuilder sb) at Microsoft.SharePoint.Client.ClientContext.ExecuteQuery() at DD.ProjectApproval.Model.SPListItemExtensions.GetFieldUserValueNew(ListItem item, String fieldName, ClientContext clientContext).
I read microsoft recomendations, but I undurstend about
e.WebRequestExecutor.WebRequest.UserAgent = "NONISV|Contoso|GovernanceCheck/1.0";
GovernanceCheck - Enterprice app name, Do I only have to register new app in Enterprice App or need to configure it else?
Contoso -name of Company, where I can find name in Azure?

1. 0 -versions of app, where I can find versions?
   And I read about "ExecuteQueryWithIncrementalRetry extension method", Is method better tnan ExecuteQueryRetry in OfficeDevPnP.Core, Version=2.24.1803.0?
   Thanks!

Answer 1

it is better to use ExecuteQueryRetry from OfficeDevPnP Core which was designed to avoid throttling issues.

Answer 2

You should switch over to use Client ID + Certificate/Secret from username/password. This will be more secure and should also help (but may not eliminate, depending on what you're doing, stamp health, etc.) avoid 429 responses.

Answer 3

Hi @Nerobov Andrey ,

Please refer the official document below to use e.WebRequestExecutor.WebRequest.UserAgent for avoid throttling:

Avoid getting throttled or blocked in SharePoint Online

Also you can build a extension method ExecuteQueryWithIncrementalRetry also like official document for handling 429 throttling issue.

Thanks
Best Regards

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Answer 4

@Jerryzy-MSFT thanks. but I am already it : using (var ctx = new ClientContext(new Uri(Consts.PortalUrl, UriKind.Absolute)))
{
log.Info(Environment.UserDomainName);
log.Info(Consts.getMailIP);
var creds = new NetworkCredential(Autorization.UserEmail, Autorization.Password);
ctx.Credentials = new SharePointOnlineCredentials(creds.UserName, creds.SecurePassword);
ctx.ExecutingWebRequest += delegate (object sender, WebRequestEventArgs e)
{
e.WebRequestExecutor.WebRequest.UserAgent = $"NONISV|Digdes|{Consts.AppSettings.Name}/1.0";
};
}
but it don't help me. Probably, is UserAgent wrong? How check it?

Answer 5

@Nerobov Andrey ,

I used the UserAgent "NONISV|Contoso|GovernanceCheck/1.0", it's working per the test:

But as you have met the 429 error in your environment, you should firstly wait for 429 recovery, then use the UserAgent for avoiding the issue.