This browser is no longer supported.
Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support.
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(262.40000000000003, 53%, 35%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAR%3C/text%3E%3C/svg%3E)
When graph endpoint for adding tabs POST: /tabs gives throttling (429) error. When RetryHandler calls retryRequest it checks for isBuffered where it requires header Transfer-Encoding as Chunked, in order to send True and to set shouldRetry flag as True.
Issue Class : com.microsoft.graph.httpcore.RetryHandler (microsoft-graph SDK version 2.7.1)
Some times header "Transfer-Encoding = chunked" is missing in the response headers. Causing it to return False. As a result it sets shouldRetry flag as False and it never retry again.
Response Headers :
[
Cache-Control : private,
client-request-id : 5a064a73-9106-40ec-8dff-4069c5752de4,
Content-Length : 885,
Content-Type : application/json,
Date : Fri, 26 Feb 2021 14:03:23 GMT,
request-id : 64638ad8-1f98-49d1-9185-238341d4938e,
Retry-After : 60,
Strict-Transport-Security : max-age=31536000,
x-ms-ags-diagnostic :
{"ServerInfo": {"DataCenter":"SouthIndia","Slice":"SliceC","Ring":"3", "ScaleUnit":"001","RoleInstance":"AGSFE_IN_7" }}
]
Response Body :
{
"error": {
"code": "TooManyRequests",
"message": "Too many requests from Identifier:9155ce04-4eae-42ae-905e-ac219c282f72+786c9214-bb88-448d-9a43-3afeb1518b52+786c9214-bb88-448d-9a43-3afeb1518b52 under category:throttle.teams.ags.api_complex_level_10.tenant_normal.app_normal.operation_write_sustained. Please try again later.",
"innerError": {
"date": "2021-02-26T14:03:23",
"request-id": "64638ad8-1f98-49d1-9185-238341d4938e",
"client-request-id": "5a064a73-9106-40ec-8dff-4069c5752de4",
"status": 429,
"code": "429",
"message": "Too many requests from Identifier:9155ce04-4eae-42ae-905e-ac219c282f72+786c9214-bb88-448d-9a43-3afeb1518b52+786c9214-bb88-448d-9a43-3afeb1518b52 under category:throttle.teams.ags.api_complex_level_10.tenant_normal.app_normal.operation_write_sustained. Please try again later."
}
}
}
Building, integrating, or customizing apps and workflows within Microsoft Teams using developer tools and APIs
An API that connects multiple Microsoft services, enabling data access and automation across platforms
Adding right tags/teams to answer....
Just a quick question, outside of SDK can you repro the issue as well (say, with POSTMAN/Graph explorer)
Yes, I have tested by throttling POST /tabs endpoint.
I throttled the /tabs endpoint using while loop in program. And fire same endpoint using postman. I have seen in some cases "Transfer-Encoding = chunked" was missing in the response. 
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(102.4, 35%, 19%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJM%3C/text%3E%3C/svg%3E)
Hi AadityaRane-1988,
Sorry for the delayed response.
We are working on it practically and throttled the /tabs endpoint using parallel loop. so will update the progress ASAP.
The issue was got fixed in msgraph-sdk-java-core 1.0.9
https://github.com/microsoftgraph/msgraph-sdk-java-core/issues/160
Hi AadityaRane-1988, We have tested the retry handler code using parallel loop by taking threshold limit = 200, didn't face any issue while creating the tab in this scenario. Could you please try with below code.
int i, n = 200;
Parallel.For(0, n, i =>
{
var teamsTab = new TeamsTab
{
DisplayName = "My Tab" + i,
Configuration = new TeamsTabConfiguration
{
EntityId = "2DCA2E6C7A10415CAF6B8AB66121435",
ContentUrl = _configuration["BaseUri"] + "/TestTab" + i,
WebsiteUrl = _configuration["BaseUri"] + "/TestTab" + i
},
AdditionalData = new Dictionary<string, object>()
{
{ "******@odata.bind", "https://graph.microsoft.com/v1.0/appCatalogs/teamsApps/" + teamsAppId }
}
};
var result = graphClient.Teams[teamId].Channels[channelId].Tabs
.Request()
.AddAsync(teamsTab);
});
