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Update service_invocation_api.md (#415) 

* Update service_invocation_api.md

* Update service_invocation_api.md
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Yaron Schneider 2020-03-10 12:15:48 -07:00 committed by GitHub
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reference/api/service_invocation_api.md
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@ -19,9 +19,13 @@ POST/GET/PUT/DELETE http://localhost:<daprPort>/v1.0/invoke/<appId>/method/<meth
### HTTP Response codes ### HTTP Response codes
When a service invokes another service with Dapr, the status code of the called service will be returned to the caller.
If there's a network error or other transient error, Dapr will return a `500` error with the detailed error message.
In case a user invokes Dapr over HTTP to talk to a gRPC enabled service, an error from the called gRPC service will return as `500` and a successful response will return as `200OK`.
Code | Description Code | Description
---- | ----------- ---- | -----------
200 | Request successful
500 | Request failed 500 | Request failed
### URL Parameters ### URL Parameters