后台检查点线程遇到了不可恢复的错误。检查点进程正在终止，以便该线程能够清除其资源。这只是一条信息性消息，用户不需要执行任何操作。

The background checkpoint thread has encountered an unrecoverable error. The checkpoint process is terminating so that the thread can clean up its resources. This is an informational message only. No user action is required.