From 14eae8f360cc023f72fb347f45e8ac33f40fdf4c Mon Sep 17 00:00:00 2001
From: Carl Mastrangelo <notcarl@google.com>
Date: Tue, 27 Sep 2016 10:54:02 -0700
Subject: [PATCH] Update Protocol spec to mention idempotency

---
 doc/PROTOCOL-HTTP2.md | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/doc/PROTOCOL-HTTP2.md b/doc/PROTOCOL-HTTP2.md
index df7585d609..18803f2a09 100644
--- a/doc/PROTOCOL-HTTP2.md
+++ b/doc/PROTOCOL-HTTP2.md
@@ -175,6 +175,16 @@ grpc-ruby/1.2.3
 grpc-ruby-jruby/1.3.4
 grpc-java-android/0.9.1 (gingerbread/1.2.4; nexus5; tmobile)
 ```
+
+####Idempotency and Retries
+
+Unless explicitly defined to be, gRPC Calls are not assumed to be idempotent.  Specifically:
+
+* Calls that cannot be proven to have started will not be retried.
+* There is no mechanisim for duplicate suppression as it is not necessary.
+* Calls that are marked as idempotent may be sent multiple times.
+
+
 ####HTTP2 Transport Mapping
 
 #####Stream Identification
-- 
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