Hi, Trying to deploy this architecture (https://cvmfs.readthedocs.io/en/stable/_images/xcache2.svg), I'm facing a problem when downloading a file through http. Everythting works well till the last chunk is downloaded. As an example, here is a simple curl performed from the client machine (and this is the same behaviour with cvmfs client) : ### Through xcache server ### $ curl -v -o file1 http://my_xcache_server:1094//http://path/to/my/file % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0* About to connect() to my_xcache_server port 1094 (#0) * Trying xxx.xxx.xxx.xxx... * Connected to my_xcache_server (xxx.xxx.xxx.xxx) port 1094 (#0) > GET //http://path/to/my/file HTTP/1.1 > User-Agent: curl/7.29.0 > Host: my_xcache_server:1094 > Accept: */* > < HTTP/1.1 200 OK < Connection: Keep-Alive < Content-Length: 506173152 < { [data not shown] 99 482M 99 480M 0 0 57.9M 0 0:00:08 0:00:08 --:--:-- 29.9M* transfer closed with 2856672 bytes remaining to read 99 482M 99 480M 0 0 57.7M 0 0:00:08 0:00:08 --:--:-- 11.5M * Closing connection 0 curl: (18) transfer closed with 2856672 bytes remaining to read ### Direct download ### curl -v -o file2 http://path/to/my/file % Total % Received % Xferd Average Speed Time Time Time Current Dload Upload Total Spent Left Speed 0 0 0 0 0 0 0 0 --:--:-- --:--:-- --:--:-- 0* About to connect() to source_server port 8000 (#0) * Trying 145.146.100.30... * Connected to source_server (xxx.xxx.xxx.xxx) port 8000 (#0) > GET path/to/my/file HTTP/1.1 > User-Agent: curl/7.29.0 > Host: source_server:8000 > Accept: */* > < HTTP/1.1 200 OK < Connection: Keep-Alive < Content-Length: 506173152 < { [data not shown] 100 482M 100 482M 0 0 101M 0 0:00:04 0:00:04 --:--:-- 101M * Connection #0 to host source_server left intact ### Xcache server logs (last chunk) ### 210506 08:53:05 155627 sysXrdHttp: XrdHttpReq::Data! final=1 210506 08:53:05 155627 unknown.2:23@clientmachine sysXrdHttp: PostProcessHTTPReq req: 2 reqstate: 481 210506 08:53:05 155627 unknown.2:23@clientmachine sysXrdHttp: Got data vectors to send:1 210506 08:53:05 155627 sysXrdHttp: Sending 1048576 bytes 210506 08:53:05 155627 unknown.2:23@clientmachine sysXrdHttp: Process. lp:0 reqstate: 481 210506 08:53:05 155627 unknown.2:23@clientmachine sysXrdHttp: Process is exiting rc:0 210506 08:53:05 155627 XrdPfc_IO: dump Read() 0x7fc1d00019f0 off: 503316480 size: 1048576 http:[log in to unmask]:8000/http/source.server:8000/path/to/file? 210506 08:53:05 155627 XrdPfc_File: dump Read() idx 120 http/source.server:8000/path/to/file 210506 08:53:05 155627 XrdPfc_File: dump inc_ref_count 0x7fc1a0403530 refcnt 1 http/source.server:8000/path/to/file 210506 08:53:05 155627 XrdPfc_File: dump Read() 0x7fc1f0028000inc_ref_count for existing block 0x7fc1a0403530 idx = 120 http/source.server:8000/path/to/file XcacheH: stagein list snapshot: available workers: 10, list length: 0 [2021-05-06 08:53:09.092614 +0200][Error ][XrdClHttp ] Could not read URL: http:[log in to unmask]:8000//path/to/file?, error: [ERROR] Internal error: no such device or address: Result Invalid Read in request after 3 attempts 210506 08:53:09 155645 XrdPfc_File: dump Prefetch enter to check download status http/source.server:8000/path/to/file 210506 08:53:09 155645 XrdPfc_File: debug Prefetch file is complete, stopping prefetch. http/source.server:8000/path/to/file 210506 08:53:09 155626 XrdPfc_File: dump ProcessBlockResponse block=0x7fc1a0403530, idx=120, off=503316480, res=-6 http/source.server:8000/path/to/file 210506 08:53:09 155626 XrdPfc_File: debug ProcessBlockResponse after failed prefetch on io 0x7fc1d00019f0 disabling prefetching on this io. http/source.server:8000/path/to/file 210506 08:53:09 155626 XrdPfc_File: error ProcessBlockResponse block 0x7fc1a0403530, idx=120, off=503316480 error=-6 http/source.server:8000/path/to/file 210506 08:53:09 155627 XrdPfc_File: dump Read() requested block finished 0x7fc1a0403530, is_failed()=True http/source.server:8000/path/to/file 210506 08:53:09 155627 XrdPfc_File: error Read() io 0x7fc1d00019f0, block 120 finished with error 6 no such device or address http/source.server:8000/path/to/file 210506 08:53:09 155627 XrdPfc_File: dump Read() dec_ref_count 0x7fc1a0403530 idx = 120 http/source.server:8000/path/to/file 210506 08:53:09 155627 XrdPfc_File: dump free_block block 0x7fc1a0403530 idx = 120 http/source.server:8000/path/to/file 210506 08:53:09 155627 XrdPfc_IO: warning Read() error in File::Read(), exit status=-6, error=no such device or address http:[log in to unmask]:8000/http/source.server:8000/path/to/file? 210506 08:53:09 155627 ofs_read: unknown.2:23@clientmachine Unable to read /http:/source.server:8000/path/to/file; no such device or address 210506 08:53:09 155627 sysXrdHttp: XrdHttpReq::Error 210506 08:53:09 155627 unknown.2:23@clientmachine sysXrdHttp: PostProcessHTTPReq req: 2 reqstate: 482 210506 08:53:09 155627 unknown.2:23@clientmachine sysXrdHttp: PostProcessHTTPReq mapping Xrd error [3005] to status code [500] 210506 08:53:09 155627 unknown.2:23@clientmachine sysXrdHttp: Stopping request because more data is expected but no data has been read. 210506 08:53:09 155627 sysXrdHttp: XrdHttpReq request ended. 210506 08:53:09 155627 sysXrdHttp: Cleanup 210506 08:53:09 155627 sysXrdHttp: Reset 210506 08:53:09 155627 sysXrdHttp: XrdHttpReq request ended. 210506 08:53:09 155627 XrootdXeq: unknown.2:23@clientmachine disc 0:00:09 (send failure) 210506 08:53:09 155627 XrdPfc_File: debug ioActive start for io 0x7fc1d00019f0 http/path/to/file 210506 08:53:09 155627 XrdPfc_File: info ioActive for io 0x7fc1d00019f0, active_prefetches 0, allow_prefetching False, ioactive_false_reported False, ios_in_detach 0 210506 08:53:09 155627 XrdPfc_File: info io_map.size() 1, block_map.size() 0, file http/path/to/file 210506 08:53:09 155627 XrdPfc_File: info ioActive for io 0x7fc1d00019f0 returning False, file http/path/to/file 210506 08:53:09 155627 XrdPfc_IO: info DetachFinalize() 0x7fc1d00019f0 210506 08:53:09 155627 XrdPfc_Cache: debug ReleaseFile http/path/to/file, io 0x7fc1d00019f0 210506 08:53:09 155627 XrdPfc_File: debug RemoveIO() io = 0x7fc1d00019f0 http/path/to/file 210506 08:53:09 155627 XrdPfc_Cache: debug dec_ref_cnt http/path/to/file, cnt at entry = 1 210506 08:53:09 155627 XrdPfc_File: debug FinalizeSyncBeforeExit requesting sync to write detach stats http/path/to/file 210506 08:53:09 155627 XrdPfc_Cache: debug dec_ref_cnt http/path/to/file, scheduling final sync 210506 08:53:09 155627 XrdPfc_IO: debug ~IOEntireFile() 0x7fc1d00019f0 http:[log in to unmask]:8000/http/path/to/file? 210506 08:53:09 155627 Posix_PrepIODisable: Disabling defered open http:[log in to unmask]:8000//path/to/file? 210506 08:53:09 160872 XrdPfc_File: dump Sync() http/path/to/file 210506 08:53:09 160872 XrdPfc_File: dump Sync 0 blocks written during sync http/path/to/file 210506 08:53:09 160872 XrdPfc_Cache: debug dec_ref_cnt http/path/to/file, cnt at entry = 1 210506 08:53:09 160872 XrdPfc_File: debug FinalizeSyncBeforeExit sync not required http/path/to/file 210506 08:53:09 160872 XrdPfc_Cache: debug dec_ref_cnt http/path/to/file, cnt after sync_check and dec_ref_cnt = 0 210506 08:53:09 160872 XrdPfc_File: debug ~File() close info http/path/to/file 210506 08:53:09 160872 XrdPfc_File: debug ~File() close output http/path/to/file 210506 08:53:09 160872 XrdPfc_File: debug ~File() ended, prefetch score = 3.95238 http/path/to/file 210506 08:53:11 155631 Posix_DDestroy: DLY destory of 1 objects; 0 already lost. 210506 08:53:11 155631 Posix_DDestroy: DLY destory end; 0 objects deferred and 0 lost. ### Xcache config ### all.role proxy server all.export /http:/ all.export /https:/ ofs.osslib libXrdPss.so xrootd.seclib /usr/lib64/libXrdSec.so pss.origin =http,https # US data servers pss.permit source.server pss.permit source.server pss.permit source.server pss.permit source.server pss.permit source.server pss.permit source.server pss.permit source.server # EU data servers pss.permit source.server pss.permit source.server pss.permit source.server pss.cachelib libXrdPfc.so pss.config streams 8 # XcacheH pss.namelib -lfncachesrc+ /usr/lib64/XrdName2NameXcacheH.so cacheLife=1d cacheBlockSize=4m pss.ccmlib /usr/lib64/XrdName2NameXcacheH.so oss.localroot /xcache/ns # Metadata directories (cinfo files) oss.space meta /xcache/meta # Data directories oss.space data /xcache/data # Xcache spaces assignement pfc.spaces data meta if exec xrootd xrd.protocol http:1094 libXrdHttp.so fi pfc.diskusage 0.90 0.95 pfc.ram 6g pfc.blocksize 4M pfc.prefetch 32 pfc.trace dump http.trace all pss.trace all pss.debug ### xrootd version: 5.1.1 ### As a result, I got an almost file downloaded on client side, and also in xcache server, cached data is an almost file. Just this last chunk missing. Are there directives missing in congig file? Thank you, Bertrand Rigaud Centre de Calcul de l'IN2P3 - CNRS 21 avenue Pierre de Coubertin 69627 Villeurbanne CEDEX Tél : 04.78.93.08.80 ######################################################################## Use REPLY-ALL to reply to list To unsubscribe from the XROOTD-L list, click the following link: https://listserv.slac.stanford.edu/cgi-bin/wa?SUBED1=XROOTD-L&A=1