Close idle MetaClient http connections

Prevents too many open files when running tests

cmd/influxd/run/server_helpers_test.go

@@ -96,7 +96,9 @@ func OpenDefaultServer(c *run.Config, joinURLs string) *Server {
 
 // Close shuts down the server and removes all temporary paths.
 func (s *Server) Close() {
-	s.Server.Close()
+	if err := s.Server.Close(); err != nil {
+		panic(err.Error())
+	}
 	os.RemoveAll(s.Config.Meta.Dir)
 	os.RemoveAll(s.Config.Data.Dir)
 	os.RemoveAll(s.Config.HintedHandoff.Dir)

cmd/influxd/run/server_test.go

@@ -4573,7 +4573,6 @@ func TestServer_Query_Chunk(t *testing.T) {
 			t.Error(query.failureMessage())
 		}
 	}
-
 }
 
 func TestServer_Query_DropAndRecreateMeasurement(t *testing.T) {

services/meta/client.go

@@ -101,6 +101,10 @@ func (c *Client) Close() error {
 	c.mu.Lock()
 	defer c.mu.Unlock()
 
+	if t, ok := http.DefaultTransport.(*http.Transport); ok {
+		t.CloseIdleConnections()
+	}
+
 	select {
 	case <-c.closing:
 		return nil