你好，使用xunsearch 1.4.17 过程中出现下面的问题

[zhishufei]

启动和重启日志中
13:09:11 logging[15160] ALERT >> running in scan mode (HOME:data/, STAT_TAG:2023-W22)
13:09:11 logging[15161] ALERT >> begin child process (NAME:manhua) <<
terminate called after throwing an instance of 'Xapian::DatabaseCorruptError'
2023-06-02 13:09:12 indexd[12030] ERROR failed to find db by pid (PID:15160)

temp php调用搜索 日志出现：
2023-06-02 14:56:10 worker1[12038] ERROR [sock:7] xapian exception on sending doc (ERROR:The revision being read has been discarded - you should call Xapian::Database::reopen() and retry the operation)
2023-06-02 14:56:10 worker1[12038] ERROR [sock:7] xapian exception on sending doc (ERROR:The revision being read has been discarded - you should call Xapian::Database::reopen() and retry the operation)
2023-06-02 14:56:12 worker2[12039] ERROR [sock:7] xapian exception on sending doc (ERROR:The revision being read has been discarded - you should call Xapian::Database::reopen() and retry the operation)
2023-06-02 14:56:12 worker2[12039] ERROR [sock:7] xapian exception on sending doc (ERROR:The revision being read has been discarded - you should call Xapian::Database::reopen() and retry the operation)
2023-06-02 14:56:12 worker2[12039] ERROR [sock:7] xapian exception on sending doc (ERROR:The revision being read has been discarded - you should call Xapian::Database::reopen() and retry the operation)

这个是什么原因