server: fix nil panic in GetProgressByID and GetProgressByAction (#10527)

close #10526

Signed-off-by: songqing <zhangsongqing164@163.com>

Author: songqing

server/handler.go

@@ -335,12 +335,20 @@ func (h *Handler) ResetTS(ts uint64, ignoreSmaller, skipUpperBoundCheck bool, _
 
 // GetProgressByID returns the progress details for a given store ID.
 func (h *Handler) GetProgressByID(storeID uint64) (*progress.Progress, error) {
-	return h.s.GetRaftCluster().GetProgressByID(storeID)
+	c, err := h.GetRaftCluster()
+	if err != nil {
+		return nil, err
+	}
+	return c.GetProgressByID(storeID)
 }
 
 // GetProgressByAction returns the progress details for a given action.
 func (h *Handler) GetProgressByAction(action string) (*progress.Progress, error) {
-	return h.s.GetRaftCluster().GetProgressByAction(action)
+	c, err := h.GetRaftCluster()
+	if err != nil {
+		return nil, err
+	}
+	return c.GetProgressByAction(action)
 }
 
 // PluginLoad loads the plugin referenced by the pluginPath