imc dbman定时备份失败

imc通过dbman每天定时备份还原，但是最近出现1-2个月自动备份还原失败，手动删除备份的数据库文件，再设置一下手动备份就可以了。查看备份日志如下：

主：

2022-07-28 23:12:16 [INFO] [CDbBackup::BackupOneLocalDBase] Success to backup 'D:\iMCbak\127.0.0.1@wlan_db_imc_wsm_db_20220728_230000_full.db' 

2022-07-28 23:12:16 [INFO] [CDbBackup::BackupOneLocalDBase] ifAuto: 1;ifTrans: 1;bakDbIp: 10.11.89.28,bakDBReceivePath: D:\iMCbak 2022-07-28 23:12:16 [INFO] [Client::connect_to_server] Starting connect to 10.11.89.28: 2810 

2022-07-28 23:12:16 [INFO] [Client::connect_to_server] Established connection to 10.11.89.28: 2810 

2022-07-28 23:12:16 [INFO] [Client::send_filetrans_msg] Dbman space check ok, preparing to transfer files(D:\iMCbak\127.0.0.1@wlan_db_imc_wsm_db_20220728_230000_full.db). 

2022-07-28 23:13:49 [ERROR] [Client::send_filetrans_msg] Send file data error expect 1024 bytes infact -1 bytes

 2022-07-28 23:13:49 [INFO] [CDbBackup::BackupOneLocalDBase] File trans failed 

2022-07-28 23:13:49 [INFO] [sendTrapAlert] Send trap success 2022-07-28 23:13:49 [WARNING] [CDbBackup::BackupAllDataBase] Backup database: wlan_db failed 

2022-07-28 23:13:49 [ERROR] [CommonBackup] backup all db failed .

备：

2022-07-28 23:11:10 [INFO] [FileTrans] Dbman space is enough, trans files is safety. 

2022-07-28 23:12:16 [DEBUG] [My_Accept_Handler::handle_input] Connection established 10.11.89.24 

2022-07-28 23:12:16 [DEBUG] [CDataConnStreamQueueT::deal_msg] Receive encode length: 24 2022-07-28 23:12:16 [DEBUG] [CDataConnStreamQueueT::deal_msg] Receive encode : 8D41SfS0N3vdFdvF2nfCUw== 

2022-07-28 23:12:16 [DEBUG] [CDataConnStreamQueueT::deal_msg] After debase64 length: 16 

2022-07-28 23:12:16 [DEBUG] [CDataConnStreamQueueT::deal_msg] Receive command code: 10010 

2022-07-28 23:12:16 [DEBUG] [CDataConnStreamQueueT::deal_msg] Succeed to create FileTrans thread 

2022-07-28 23:12:16 [INFO] [FileTrans] Dbman space is enough, trans files is safety. 

2022-07-28 23:13:49 [DEBUG] [FileTrans] errno: 112, strerror: Unknown error 2022-07-28 23:13:49 [ERROR] [FileTrans] Failed to write file: D:\iMCbak\127.0.0.1@wlan_db_imc_wsm_db_20220728_230000_full.db 

2022-07-28 23:13:49 [ERROR] [response_err_code] errCode = -1

出现这个错误是什么意思？

现场两台服务器是有加入到域控里面。