Fix JetBrains IDEs not properly sending heartbeats to Gitpod's server.

components/ide/jetbrains/backend-plugin/src/main/kotlin/io/gitpod/jetbrains/remote/latest/GitpodTerminalService.kt

@@ -204,6 +204,11 @@ class GitpodTerminalService(private val session: ClientProjectSession) {
                     }
                 }
 
+                override fun onPortForwardingEnded(hostPort: Int) {
+                    thisLogger().info("gitpod: Port $hostPort from Supervisor's Terminal " +
+                            "${supervisorTerminal.pid} is not being forwarded anymore.")
+                }
+
                 override fun onPortForwardingFailed(hostPort: Int, reason: String) {
                     thisLogger().error("gitpod: Failed to forward port $hostPort from Supervisor's Terminal " +
                             "${supervisorTerminal.pid}: $reason")

dev/gpctl/cmd/workspaces-last-heartbeat.go

@@ -0,0 +1,47 @@
+// Copyright (c) 2020 Gitpod GmbH. All rights reserved.
+// Licensed under the GNU Affero General Public License (AGPL).
+// See License-AGPL.txt in the project root for license information.
+
+package cmd
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/spf13/cobra"
+
+	"github.com/gitpod-io/gitpod/common-go/log"
+	"github.com/gitpod-io/gitpod/ws-manager/api"
+)
+
+// workspacesLastHeartbeatCmd get workspace last heartbeat time
+var workspacesLastHeartbeatCmd = &cobra.Command{
+	Use:   "last-heartbeat <instanceID>",
+	Short: "get workspace last heartbeat time",
+	Args:  cobra.ExactArgs(1),
+	Run: func(cmd *cobra.Command, args []string) {
+		ctx, cancel := context.WithCancel(context.Background())
+		defer cancel()
+
+		conn, client, err := getWorkspacesClient(ctx)
+		if err != nil {
+			log.WithError(err).Fatal("cannot connect")
+		}
+		defer conn.Close()
+
+		instanceID := args[0]
+
+		resp, err := client.DescribeWorkspace(ctx, &api.DescribeWorkspaceRequest{
+			Id: instanceID,
+		})
+		if err != nil {
+			log.WithError(err).Fatal("error during RPC call")
+		}
+
+		fmt.Println(resp.LastActivity)
+	},
+}
+
+func init() {
+	workspacesCmd.AddCommand(workspacesLastHeartbeatCmd)
+}