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In this article:

  • Naming convention
  • Attributes
  • Example
  1. Traces
  2. Application instrumentation
  3. RPC calls

RPC calls

Written by
Yandex Cloud
Updated at March 24, 2026
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  • Naming convention
  • Attributes
  • Example

If you are using automatic instrumentation, RPC call spans are created and attributes filled automatically. If using manual instrumentation, follow the conventions described below:

Naming conventionNaming convention

The span name has the <package>.<service>/<method> format, e.g., grpc.users.UserService/GetUserInfo. If the package name is missing or unknown, the <package>. part is omitted. For more information, see the RPC span naming specification.

AttributesAttributes

Attribute

Description

rpc.system

RPC system type: grpc, java_rmi, dotnet_wcf, etc.

rpc.service

Service name: UserService

rpc.method

Method name: GetUserInfo

rpc.grpc.status_code

gRPC status code: 0 is OK, 2 is UNKNOWN, etc.

server.address

Host name or IP address of the target server

server.port

Target server port

client.address

Client IP address

client.port

Client port

For a full list of attributes, see the OpenTelemetry specification for RPC spans.

ExampleExample

order-service requests user data from user-service over gRPC:

Attribute

Client span

Server span

Name

grpc.users.UserService/GetUserInfo

grpc.users.UserService/GetUserInfo

Kind

CLIENT

SERVER

Status

OK

OK

rpc.system

grpc

grpc

rpc.service

UserService

UserService

rpc.method

GetUserInfo

GetUserInfo

rpc.grpc.status_code

0

0

server.address

grpc.users.example.com

—

server.port

443

—

client.address

—

10.1.2.80

client.port

—

65123

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