[receiver/opencensusreceiver] Fix memory leak on shutdown

.chloggen/goleak_opencensuscomps.yaml

@@ -0,0 +1,27 @@
+# Use this changelog template to create an entry for release notes.
+
+# One of 'breaking', 'deprecation', 'new_component', 'enhancement', 'bug_fix'
+change_type: bug_fix
+
+# The name of the component, or a single word describing the area of concern, (e.g. filelogreceiver)
+component: opencensusreceiver
+
+# A brief description of the change.  Surround your text with quotes ("") if it needs to start with a backtick (`).
+note: Fix memory leak on shutdown
+
+# Mandatory: One or more tracking issues related to the change. You can use the PR number here if no issue exists.
+issues: [31152]
+
+# (Optional) One or more lines of additional information to render under the primary note.
+# These lines will be padded with 2 spaces and then inserted directly into the document.
+# Use pipe (|) for multiline entries.
+subtext:
+
+# If your change doesn't affect end users or the exported elements of any package,
+# you should instead start your pull request title with [chore] or use the "Skip Changelog" label.
+# Optional: The change log or logs in which this entry should be included.
+# e.g. '[user]' or '[user, api]'
+# Include 'user' if the change is relevant to end users.
+# Include 'api' if there is a change to a library API.
+# Default: '[user]'
+change_logs: []

exporter/opencensusexporter/go.mod

@@ -21,6 +21,7 @@ require (
 	go.opentelemetry.io/collector/receiver v0.94.1
 	go.opentelemetry.io/otel/metric v1.23.0
 	go.opentelemetry.io/otel/trace v1.23.0
+	go.uber.org/goleak v1.3.0
 	google.golang.org/grpc v1.61.0
 )
 

exporter/opencensusexporter/package_test.go

@@ -0,0 +1,14 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package opencensusexporter
+
+import (
+	"testing"
+
+	"go.uber.org/goleak"
+)
+
+func TestMain(m *testing.M) {
+	goleak.VerifyTestMain(m)
+}

receiver/opencensusreceiver/opencensus.go

@@ -37,6 +37,7 @@ type ocReceiver struct {
 	gatewayMux         *gatewayruntime.ServeMux
 	corsOrigins        []string
 	grpcServerSettings configgrpc.ServerConfig
+	cancel             context.CancelFunc
 
 	traceReceiver   *octrace.Receiver
 	metricsReceiver *ocmetrics.Receiver
@@ -192,6 +193,10 @@ func (ocr *ocReceiver) Shutdown(context.Context) error {
 	// tests and code should be reactive in less than even 1second.
 	// ocr.serverGRPC.Stop()
 
+	if ocr.cancel != nil {
+		ocr.cancel()
+	}
+
 	return err
 }
 
@@ -213,7 +218,8 @@ func (ocr *ocReceiver) httpServer() *http.Server {
 
 func (ocr *ocReceiver) startServer() error {
 	// Register the grpc-gateway on the HTTP server mux
-	c := context.Background()
+	var c context.Context
+	c, ocr.cancel = context.WithCancel(context.Background())
 	opts := []grpc.DialOption{grpc.WithTransportCredentials(insecure.NewCredentials())}
 	endpoint := ocr.ln.Addr().String()
 

receiver/opencensusreceiver/package_test.go

@@ -0,0 +1,14 @@
+// Copyright The OpenTelemetry Authors
+// SPDX-License-Identifier: Apache-2.0
+
+package opencensusreceiver
+
+import (
+	"testing"
+
+	"go.uber.org/goleak"
+)
+
+func TestMain(m *testing.M) {
+	goleak.VerifyTestMain(m)
+}