1 //
2 //
3 // Copyright 2017 gRPC authors.
4 //
5 // Licensed under the Apache License, Version 2.0 (the "License");
6 // you may not use this file except in compliance with the License.
7 // You may obtain a copy of the License at
8 //
9 // http://www.apache.org/licenses/LICENSE-2.0
10 //
11 // Unless required by applicable law or agreed to in writing, software
12 // distributed under the License is distributed on an "AS IS" BASIS,
13 // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 // See the License for the specific language governing permissions and
15 // limitations under the License.
16 //
17 //
18
19 #include <memory>
20
21 #include "absl/types/optional.h"
22 #include "gtest/gtest.h"
23
24 #include <grpc/impl/channel_arg_names.h>
25 #include <grpc/status.h>
26
27 #include "src/core/lib/channel/channel_args.h"
28 #include "src/core/lib/gprpp/time.h"
29 #include "test/core/end2end/end2end_tests.h"
30
31 namespace grpc_core {
32
33 // Tests a basic retry scenario:
34 // - 2 retries allowed for ABORTED status
35 // - first attempt returns ABORTED
36 // - second attempt returns OK
CORE_END2END_TEST(RetryTest,Retry)37 CORE_END2END_TEST(RetryTest, Retry) {
38 InitServer(ChannelArgs());
39 InitClient(ChannelArgs().Set(
40 GRPC_ARG_SERVICE_CONFIG,
41 "{\n"
42 " \"methodConfig\": [ {\n"
43 " \"name\": [\n"
44 " { \"service\": \"service\", \"method\": \"method\" }\n"
45 " ],\n"
46 " \"retryPolicy\": {\n"
47 " \"maxAttempts\": 3,\n"
48 " \"initialBackoff\": \"1s\",\n"
49 " \"maxBackoff\": \"120s\",\n"
50 " \"backoffMultiplier\": 1.6,\n"
51 " \"retryableStatusCodes\": [ \"ABORTED\" ]\n"
52 " }\n"
53 " } ]\n"
54 "}"));
55 auto c =
56 NewClientCall("/service/method").Timeout(Duration::Seconds(5)).Create();
57 EXPECT_NE(c.GetPeer(), absl::nullopt);
58 IncomingStatusOnClient server_status;
59 IncomingMetadata server_initial_metadata;
60 IncomingMessage server_message;
61 c.NewBatch(1)
62 .SendInitialMetadata({})
63 .SendMessage("foo")
64 .RecvMessage(server_message)
65 .SendCloseFromClient()
66 .RecvInitialMetadata(server_initial_metadata)
67 .RecvStatusOnClient(server_status);
68 auto s = RequestCall(101);
69 Expect(101, true);
70 Step();
71
72 // Make sure the "grpc-previous-rpc-attempts" header was not sent in the
73 // initial attempt.
74 EXPECT_EQ(s.GetInitialMetadata("grpc-previous-rpc-attempts"), absl::nullopt);
75
76 EXPECT_NE(s.GetPeer(), absl::nullopt);
77 EXPECT_NE(c.GetPeer(), absl::nullopt);
78
79 IncomingCloseOnServer client_close;
80 s.NewBatch(102)
81 .SendInitialMetadata({})
82 .SendStatusFromServer(GRPC_STATUS_ABORTED, "xyz", {})
83 .RecvCloseOnServer(client_close);
84 Expect(102, true);
85 Step();
86
87 auto s2 = RequestCall(201);
88 Expect(201, true);
89 Step();
90
91 // Make sure the "grpc-previous-rpc-attempts" header was sent in the retry.
92 EXPECT_EQ(s2.GetInitialMetadata("grpc-previous-rpc-attempts"), "1");
93
94 EXPECT_NE(s2.GetPeer(), absl::nullopt);
95 EXPECT_NE(c.GetPeer(), absl::nullopt);
96
97 IncomingMessage server_message2;
98 s2.NewBatch(202)
99 .SendInitialMetadata({})
100 .RecvMessage(server_message2)
101 .SendMessage("bar");
102 IncomingCloseOnServer client_close2;
103 s2.NewBatch(203)
104 .SendStatusFromServer(GRPC_STATUS_OK, "xyz", {})
105 .RecvCloseOnServer(client_close2);
106 Expect(202, true);
107 Expect(203, true);
108 Expect(1, true);
109 Step();
110
111 EXPECT_EQ(server_status.status(), GRPC_STATUS_OK);
112 EXPECT_EQ(server_status.message(), "xyz");
113 EXPECT_EQ(s.method(), "/service/method");
114 EXPECT_FALSE(client_close2.was_cancelled());
115 }
116
117 } // namespace grpc_core
118