fix shutdown hang when enable socket (#835) (#845)

* fix shutdown hang when enable socket

Signed-off-by: Loong <loong.dai@intel.com>

* feedback

Signed-off-by: Loong <loong.dai@intel.com>

Co-authored-by: Loong <loong.dai@intel.com>
Co-authored-by: Mukundan Sundararajan <musundar@microsoft.com>

Co-authored-by: Long Dai <long.dai@intel.com>
Co-authored-by: Loong <loong.dai@intel.com>
Co-authored-by: Mukundan Sundararajan <musundar@microsoft.com>

pkg/metadata/metadata.go

@@ -78,6 +78,10 @@ func Put(httpPort int, key, value, appID, socket string) error {
 	}
 
 	defer r.Body.Close()
+	if socket != "" {
+		// Retryablehttp does not close idle socket connections.
+		defer client.HTTPClient.CloseIdleConnections()
+	}
 	return nil
 }
 

tests/e2e/standalone/standalone_test.go

@@ -37,9 +37,7 @@ const (
 	daprDashboardVersion = "0.9.0"
 )
 
-// Removing unix domain socket tests till shutdown API with unix domain sockets is fixed.
-// https://github.com/dapr/dapr/issues/3894
-var socketCases = []string{""}
+var socketCases = []string{"", "/tmp"}
 
 func TestStandaloneInstall(t *testing.T) {
 	// Ensure a clean environment.
@@ -382,14 +380,13 @@ func testRun(t *testing.T) {
 		assert.Contains(t, output, "Exited Dapr successfully")
 	})
 
-	// t.Run("API shutdown with socket", func(t *testing.T) {
-	// 	// Test that the CLI exits on a daprd shutdown.
-	// 	output, err := spawn.Command(daprPath, "run", "--app-id", "testapp", "--unix-domain-socket", "/tmp", "--", "bash", "-c", "curl --unix-socket /tmp/dapr-testapp-http.socket -v -X POST http://unix/v1.0/shutdown; sleep 10; exit 1")
-	// 	t.Log(output)
-	// 	require.NoError(t, err, "run failed")
-	// 	assert.Contains(t, output, "Exited App successfully", "App should be shutdown before it has a chance to return non-zero")
-	// 	assert.Contains(t, output, "Exited Dapr successfully")
-	// })
+	t.Run("API shutdown with socket", func(t *testing.T) {
+		// Test that the CLI exits on a daprd shutdown.
+		output, err := spawn.Command(daprPath, "run", "--app-id", "testapp", "--unix-domain-socket", "/tmp", "--", "bash", "-c", "curl --unix-socket /tmp/dapr-testapp-http.socket -v -X POST http://unix/v1.0/shutdown; sleep 10; exit 1")
+		t.Log(output)
+		require.NoError(t, err, "run failed")
+		assert.Contains(t, output, "Exited Dapr successfully")
+	})
 }
 
 func executeAgainstRunningDapr(t *testing.T, f func(), daprArgs ...string) {