长时间没有同步，再次重做位点后，同步无法恢复，且最后更新时间和最后位点时间都不刷新

查看node日志，里面显示mainstem is not run any in node。之前有几个重新建了新的channal后同步恢复，但这次重建新的channal后也无法恢复同步，想问题的根源是什么？还望大神指点迷津。

Start with the node log around “mainstem is not run any in node” and trace the synchronization state after a long pause, position reset, and channel recreation. Determine why synchronization does not resume and why the last-update and last-position times remain unchanged; done means the root cause and a reliable recovery or verification path are documented.

Written by the indexing model from the issue text.