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Merge pull request #9291 from gyuho/fragment-watch
*: fragment watch response by server request limit
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,123 @@ | ||
| // Copyright 2018 The etcd Authors | ||
| // | ||
| // Licensed under the Apache License, Version 2.0 (the "License"); | ||
| // you may not use this file except in compliance with the License. | ||
| // You may obtain a copy of the License at | ||
| // | ||
| // http://www.apache.org/licenses/LICENSE-2.0 | ||
| // | ||
| // Unless required by applicable law or agreed to in writing, software | ||
| // distributed under the License is distributed on an "AS IS" BASIS, | ||
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| // See the License for the specific language governing permissions and | ||
| // limitations under the License. | ||
|
|
||
| package integration | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "strings" | ||
| "testing" | ||
| "time" | ||
|
|
||
| "github.com/coreos/etcd/clientv3" | ||
| "github.com/coreos/etcd/integration" | ||
| "github.com/coreos/etcd/pkg/testutil" | ||
| ) | ||
|
|
||
| // TestWatchFragmentDisable ensures that large watch | ||
| // response exceeding server-side request limit can | ||
| // arrive even without watch response fragmentation. | ||
| func TestWatchFragmentDisable(t *testing.T) { | ||
| testWatchFragment(t, false, false) | ||
| } | ||
|
|
||
| // TestWatchFragmentDisableWithGRPCLimit verifies | ||
| // large watch response exceeding server-side request | ||
| // limit and client-side gRPC response receive limit | ||
| // cannot arrive without watch events fragmentation, | ||
| // because multiple events exceed client-side gRPC | ||
| // response receive limit. | ||
| func TestWatchFragmentDisableWithGRPCLimit(t *testing.T) { | ||
| testWatchFragment(t, false, true) | ||
| } | ||
|
|
||
| // TestWatchFragmentEnable ensures that large watch | ||
| // response exceeding server-side request limit arrive | ||
| // with watch response fragmentation. | ||
| func TestWatchFragmentEnable(t *testing.T) { | ||
| testWatchFragment(t, true, false) | ||
| } | ||
|
|
||
| // TestWatchFragmentEnableWithGRPCLimit verifies | ||
| // large watch response exceeding server-side request | ||
| // limit and client-side gRPC response receive limit | ||
| // can arrive only when watch events are fragmented. | ||
| func TestWatchFragmentEnableWithGRPCLimit(t *testing.T) { | ||
| testWatchFragment(t, true, true) | ||
| } | ||
|
|
||
| // testWatchFragment triggers watch response that spans over multiple | ||
| // revisions exceeding server request limits when combined. | ||
| func testWatchFragment(t *testing.T, fragment, exceedRecvLimit bool) { | ||
| cfg := &integration.ClusterConfig{ | ||
| Size: 1, | ||
| MaxRequestBytes: 1.5 * 1024 * 1024, | ||
| } | ||
| if exceedRecvLimit { | ||
| cfg.ClientMaxCallRecvMsgSize = 1.5 * 1024 * 1024 | ||
| } | ||
| clus := integration.NewClusterV3(t, cfg) | ||
| defer clus.Terminate(t) | ||
|
|
||
| cli := clus.Client(0) | ||
| errc := make(chan error) | ||
| for i := 0; i < 10; i++ { | ||
| go func(i int) { | ||
| _, err := cli.Put(context.TODO(), | ||
| fmt.Sprint("foo", i), | ||
| strings.Repeat("a", 1024*1024), | ||
| ) | ||
| errc <- err | ||
| }(i) | ||
| } | ||
| for i := 0; i < 10; i++ { | ||
| if err := <-errc; err != nil { | ||
| t.Fatalf("failed to put: %v", err) | ||
| } | ||
| } | ||
|
|
||
| opts := []clientv3.OpOption{clientv3.WithPrefix(), clientv3.WithRev(1)} | ||
| if fragment { | ||
| opts = append(opts, clientv3.WithFragment()) | ||
| } | ||
| wch := cli.Watch(context.TODO(), "foo", opts...) | ||
|
|
||
| // expect 10 MiB watch response | ||
| select { | ||
| case ws := <-wch: | ||
| // without fragment, should exceed gRPC client receive limit | ||
| if !fragment && exceedRecvLimit { | ||
| if len(ws.Events) != 0 { | ||
| t.Fatalf("expected 0 events with watch fragmentation, got %d", len(ws.Events)) | ||
| } | ||
| exp := "code = ResourceExhausted desc = grpc: received message larger than max (" | ||
| if !strings.Contains(ws.Err().Error(), exp) { | ||
| t.Fatalf("expected 'ResourceExhausted' error, got %v", ws.Err()) | ||
| } | ||
| return | ||
| } | ||
|
|
||
| // still expect merged watch events | ||
| if len(ws.Events) != 10 { | ||
| t.Fatalf("expected 10 events with watch fragmentation, got %d", len(ws.Events)) | ||
| } | ||
| if ws.Err() != nil { | ||
| t.Fatalf("unexpected error %v", ws.Err()) | ||
| } | ||
|
|
||
| case <-time.After(testutil.RequestTimeout): | ||
| t.Fatalf("took too long to receive events") | ||
| } | ||
| } |
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