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-rw-r--r--src/proto/grpc/lb/v1/load_balancer.proto2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/proto/grpc/lb/v1/load_balancer.proto b/src/proto/grpc/lb/v1/load_balancer.proto
index 210fba1323..b6849c10d7 100644
--- a/src/proto/grpc/lb/v1/load_balancer.proto
+++ b/src/proto/grpc/lb/v1/load_balancer.proto
@@ -130,6 +130,8 @@ message Server {
// frontend requests for that pick must include the token in its initial
// metadata. The token is used by the backend to verify the request and to
// allow the backend to report load to the gRPC LB system.
+ //
+ // Its length is variable but less than 50 bytes.
string load_balance_token = 3;
// Indicates whether this particular request should be dropped by the client