求助：fastdfs+fastdht上传错误码 17

hxb_200214

fastdfs+fastdht上传问题第一次上传文件能正常返回，同一个文件再上传时会出现始下错误日志，应该是fastdht的排重功能生效了，文件已经存在了。
文档里说明当文件已经存在时会返回文件的连接，但现在怎么只返回了错误码呢。这种情况需要怎么处理呢？
日志里错误

[2016-11-16 12:36:07] ERROR - file: storage_service.c, line: 7527, client ip: 192.168.1.80, slave file: /home/fastdfs/storage/data/00/00/wKgBx1gr4c6AHcygAACurn53WtI862_150x150.JPG already exist
[2016-11-16 12:40:14] ERROR - file: storage_service.c, line: 7527, client ip: 192.168.1.80, slave file: /home/fastdfs/storage/data/00/00/wKgBx1gr4vuAT7djAADzvGTHjiQ102_150x150.JPG already exist
[2016-11-16 12:48:17] ERROR - file: storage_service.c, line: 7527, client ip: 192.168.1.80, slave file: /home/fastdfs/storage/data/00/00/wKgBx1gr4vuAT7djAADzvGTHjiQ102_150x150.JPG already exist
[2016-11-16 12:51:23] INFO - cleanup task count: 1
[2016-11-16 12:55:18] ERROR - file: storage_service.c, line: 7527, client ip: 192.168.1.80, slave file: /home/fastdfs/storage/data/00/00/wKgBx1gr5qKAQNHxAAFmmksQNGs016_150x150.jpg already exist
[2016-11-16 13:24:42] INFO - cleanup task count: 1
[2016-11-16 13:49:52] ERROR - file: storage_service.c, line: 7527, client ip: 192.168.1.80, slave file: /home/fastdfs/storage/data/00/00/wKgBx1gr826ADXKPAAIO4xJEP2Q575_150x150.jpg already exist
[2016-11-16 13:53:54] ERROR - file: storage_service.c, line: 7527, client ip: 192.168.1.80, slave file: /home/fastdfs/storage/data/00/00/wKgBx1gr9GOAJplVAAIO429f7tQ972_150x150.jpg already exist
[2016-11-16 13:55:28] ERROR - file: storage_service.c, line: 7527, client ip: 192.168.1.80, slave file: /home/fastdfs/storage/data/00/00/wKgBx1gr9MmAGHGSAAFmmg-tuV4058_150x150.jpg already exist
[2016-11-16 13:57:08] ERROR - file: storage_service.c, line: 7527, client ip: 192.168.1.80, slave file: /home/fastdfs/storage/data/00/00/wKgBx1gr9MmAGHGSAAFmmg-tuV4058_150x150_150x150_150x150.jpg already exist
[2016-11-16 13:59:20] ERROR - file: storage_service.c, line: 7527, client ip: 192.168.1.80, slave file: /home/fastdfs/storage/data/00/00/wKgBx1gr9MmAGHGSAAFmmg-tuV4058_150x150_150x150_150x150_150x150_150x150.jpg already exist
[2016-11-16 14:03:10] INFO - cleanup task count: 1
[2016-11-16 14:42:14] ERROR - file: storage_service.c, line: 7527, client ip: 192.168.1.80, slave file: /home/fastdfs/storage/data/00/01/wKgBx1gr_52AK7cRAAFmmgcGP38031_150x150.jpg already exist
[2016-11-16 14:47:11] INFO - cleanup task count: 1
[2016-11-16 15:30:10] INFO - cleanup task count: 1
[2016-11-16 15:38:13] ERROR - file: storage_service.c, line: 7527, client ip: 192.168.1.80, slave file: /home/fastdfs/storage/data/00/01/wKgBx1gsDFKAKyfrAAFmmkozBCs384_150x150.jpg already exist
[2016-11-16 15:42:10] INFO - cleanup task count: 1
[2016-11-16 16:21:11] INFO - cleanup task count: 1
[2016-11-16 17:04:28] CRIT - file: fdfs_storaged.c, line: 516, catch signal 15, program exiting...
[2016-11-16 17:04:28] INFO - exit normally.

配置是这样的
check_file_duplicate=1
file_signature_method=hash
key_namespace=FastDFS
keep_alive=1
#include /etc/fdht/fdht_servers.conf

其它配置也都设置好了。
返回信息解析出来
PROTO_HEADER_CMD_INDEX：100
PROTO_HEADER_STATUS_INDEX：17
错误码是17