Add echo in ServiceProtocol. (#1829)

Azure · Sep 8, 2023 · 79d99e9 · 79d99e9
1 parent d050dd2
commit 79d99e9
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diff --git a/specs/ServiceProtocol.md b/specs/ServiceProtocol.md
@@ -114,6 +114,7 @@ EMPTY | EMPTY | Both | Keep server connection alive ping
 `offline` | `finack` | Service -> Server | Response of received `offline` request
 `servers` | EMPTY | Server -> Service | Request to get all server ids connect to the service 
 `servers` | `<timestamp>:<server1>;<server2>` | Service -> Server | Response of `servers` ping of all server ids
+`echo` | `<identify>` | Service <-> Server | Identify the latency of server connection, available from SDK 1.21.6.
 
 ## Message Encodings