After completing flush region, we will append a log edit in the hlog file through HLog#completeCacheFlush.
when we make the hlog key, we use the seqId from the parameter, and it is generated by HLog#startCacheFlush,
Here, we may append a lower seq id edit than the last edit in the hlog file.
If it is the last edit log in the file, it may cause data loss.
We may skip the splitted log file, because we use the lase edit's seq id as its file name, and consider this seqId as the max seq id in this log file.