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XROOTD-L  April 2018

XROOTD-L April 2018

Subject:

xrootd 4.8.3-rc1 FUSE mount "eligible servers shunned"

From:

Heiko Schröter <[log in to unmask]>

Reply-To:

Support use of xrootd by HEP experiments <[log in to unmask]>

Date:

Thu, 26 Apr 2018 10:45:41 +0200

Content-Type:

text/plain

Parts/Attachments:

Parts/Attachments

text/plain (270 lines)

In short:
1) cp file via xrootd FUSE mount -> no permission # OK. Wanted behaviour.
2) xrdfs rm file -> Unable to write file; eligible servers shunned
3) xrdcp file -> Unable to create new file; file already exists.

It does not happen when copying a file with xrdcp into a forbidden
directory.

Only solution seems to be restarting the redirector.
This situation may lead into a completely blocked namespace if a user
starts a mass copy job via FUSE mount (by accident).

Are there any other options ?
IMHO xrootd should not create any caching issues when a file is
forbidden to write/create/copy.


Heiko

P.S: Also this "stalling client" pops up.



++++++++++++++++++++++++++++++++++++++++++++++
Resume State after fresh restart of redirector:
180426 10:03:53 4079 setStatus REDIRECTOR sent resume event
180426 10:03:53 4079 cms_setStatus: Manager REDIRECTOR resumed


Copy via FUSE mnt without permissions which is the wanted behaviour:
schroete@CLIENT:~$ cp MetopA.sh /mnt/xrootd/schroete/willi.dat
cp: reguläre Datei '/mnt/xrootd/schroete/willi.dat' kann nicht angelegt
werden: Keine Berechtigung
i.e. no permissions

```bash
180426 10:15:21 4071 XrdSched: Now have 3 workers
180426 10:15:21 4071 XrdSched: running main accept inq=0
180426 10:15:21 4247 XrdXeq: Worker thread started
180426 10:15:21 4072 XrdInet: Accepted connection from 7@CLIENT
180426 10:15:21 4072 XrdProtocol: matched protocol xrootd
180426 10:15:21 4072 ?:7@CLIENT XrdPoll: FD 7 attached to poller 0; num=1
180426 10:15:21 4072 ?:7@CLIENT XrootdProtocol: 0000 req=login dlen=104
180426 10:15:21 4072 root.271390:7@CLIENT XrootdResponse: 0000 sending
16 data bytes
180426 10:15:21 4072 XrootdXeq: root.271390:7@CLIENT pvt IPv4 login
180426 10:15:21 4072 root.271390:7@CLIENT XrootdProtocol: 0100
req=locate dlen=8
180426 10:15:21 4072 root.271390:7@CLIENT XrootdProtocol: 0100 locate 
/xrootd/
180426 10:15:21 4072 root.271390:7@CLIENT ofs_fsctl:  fn=/xrootd/
180426 10:15:21 4079 Receive glogin1 4 bytes on 3071
180426 10:15:21 4079 Decode glogin1 delays root.271390:7@CLIENT 5 /xrootd/
180426 10:15:21 4072 root.271390:7@CLIENT XrootdProtocol: 0100 rc=5
locate /xrootd/
180426 10:15:21 4072 root.271390:7@CLIENT XrootdProtocol: 0100 stalling
client for 5 sec
180426 10:15:21 4072 root.271390:7@CLIENT XrootdResponse: 0100 sending 4
data bytes; status=4005
180426 10:15:23 4247 XrdSched: Now have 4 workers
180426 10:15:23 4247 XrdSched: running underused thread monitor inq=0
180426 10:15:23 4247 XrdSched: 4 threads; 0 idle
180426 10:15:23 4247 XrdSched: scheduling underused thread monitor in
780 seconds
180426 10:15:23 4249 XrdXeq: Worker thread started
180426 10:15:24 4072 root.271390:7@CLIENT XrootdProtocol: 0100 request
timeout; read 0 of 24 bytes
180426 10:15:24 4072 XrdPoll: Poller 0 enabled root.271390:7@CLIENT
180426 10:15:26 4247 XrdSched: running root.271390:7@CLIENT inq=0
180426 10:15:26 4247 root.271390:7@CLIENT XrootdProtocol: 0100
req=locate dlen=8
180426 10:15:26 4247 root.271390:7@CLIENT XrootdProtocol: 0100 locate 
/xrootd/
180426 10:15:26 4247 root.271390:7@CLIENT ofs_fsctl:  fn=/xrootd/
180426 10:15:26 4079 Receive glogin1 315 bytes on 4095
180426 10:15:26 4079 Decode glogin1 sent root.271390:7@CLIENT
'Sw[::192.168.16.146]:1094 Sw[::192.168.16.144]:1094
Sw[::192.168.16.127]:1094 Sw[::192.168.16.120]:1094
Sw[::192.168.16.147]:1094 Sw[::192.168.16.139]:1094
Sw[::192.168.16.97]:1094 Sw[::192.168.16.195]:1094
Sw[::192.168.16.196]:1094 Sw[::192.168.16.134]:1094
Sw[::192.168.16.121]:1094 Sw[::192.168.16.217]:1094' /xrootd/
180426 10:15:26 4247 root.271390:7@CLIENT XrootdProtocol: 0100 rc=-1024
locate /xrootd/
180426 10:15:26 4247 root.271390:7@CLIENT XrootdResponse: 0100 sending
311 data bytes
180426 10:15:26 4249 XrdSched: running main accept inq=0
180426 10:15:26 4071 XrdInet: Accepted connection from 19@CLIENT
180426 10:15:26 4071 XrdProtocol: matched protocol xrootd
180426 10:15:26 4071 ?:19@CLIENT XrdPoll: FD 19 attached to poller 1; num=1
180426 10:15:26 4071 ?:19@CLIENT XrootdProtocol: 0000 req=login dlen=104
180426 10:15:26 4071 h21.271390:19@CLIENT XrootdResponse: 0000 sending
16 data bytes
180426 10:15:26 4071 XrootdXeq: h21.271390:19@CLIENT pvt IPv4 login
180426 10:15:26 4071 h21.271390:19@CLIENT XrootdProtocol: 0100 req=open
dlen=27
180426 10:15:26 4071 h21.271390:19@CLIENT XrootdProtocol: 0100 open
udmat /xrootd//schroete/willi.dat
180426 10:15:26 4071 h21.271390:19@CLIENT ofs_open: 200-40644
fn=/xrootd/schroete/willi.dat
180426 10:15:26 4079 Receive glogin1 4 bytes on 5119
180426 10:15:26 4079 Decode glogin1 delays h21.271390:19@CLIENT 5
/xrootd/schroete/willi.dat
180426 10:15:26 4071 h21.271390:19@CLIENT XrootdProtocol: 0100 stalling
client for 5 sec
180426 10:15:26 4071 h21.271390:19@CLIENT XrootdResponse: 0100 sending 4
data bytes; status=4005
180426 10:15:26 4071 h21.271390:19@CLIENT ofs_close: use=0 fn=dummy
180426 10:15:29 4247 root.271390:7@CLIENT XrootdProtocol: 0100 request
timeout; read 0 of 24 bytes
180426 10:15:29 4247 XrdPoll: Poller 0 enabled root.271390:7@CLIENT
180426 10:15:29 4071 h21.271390:19@CLIENT XrootdProtocol: 0100 request
timeout; read 0 of 24 bytes
180426 10:15:29 4071 XrdPoll: Poller 1 enabled h21.271390:19@CLIENT
180426 10:15:31 4072 XrdSched: running h21.271390:19@CLIENT inq=0
180426 10:15:31 4072 h21.271390:19@CLIENT XrootdProtocol: 0100 req=open
dlen=27
180426 10:15:31 4072 h21.271390:19@CLIENT XrootdProtocol: 0100 open
udmat /xrootd//schroete/willi.dat
180426 10:15:31 4072 h21.271390:19@CLIENT ofs_open: 200-40644
fn=/xrootd/schroete/willi.dat
180426 10:15:31 4079 Receive glogin1 19 bytes on 6143
180426 10:15:31 4079 Decode glogin1 redirects h21.271390:19@CLIENT to
192.168.16.217:1094 /xrootd/schroete/willi.dat
180426 10:15:31 4072 h21.271390:19@CLIENT XrootdProtocol: 0100
redirecting to 192.168.16.217:1094
180426 10:15:31 4072 h21.271390:19@CLIENT XrootdResponse: 0100 sending
18 data bytes; status=4004
180426 10:15:31 4072 h21.271390:19@CLIENT ofs_close: use=0 fn=dummy
180426 10:15:34 4072 h21.271390:19@CLIENT XrootdProtocol: 0100 request
timeout; read 0 of 24 bytes
180426 10:15:34 4072 XrdPoll: Poller 1 enabled h21.271390:19@CLIENT
```

Trying to remove the file:
schroete@CLIENT:~$ xrdfs glogin1 rm /xrootd/schroete/willi.dat
[ERROR] Server responded with an error: [3011] Unable to write file;
eligible servers shunned.

```bash
180426 10:20:15 4247 XrdSched: running main accept inq=0
180426 10:20:15 4249 XrdInet: Accepted connection from 18@CLIENT
180426 10:20:15 4249 XrdProtocol: matched protocol xrootd
180426 10:20:15 4249 ?:18@CLIENT XrdPoll: FD 18 attached to poller 2; num=1
180426 10:20:15 4249 ?:18@CLIENT XrootdProtocol: 0000 req=login dlen=101
180426 10:20:15 4249 schroete.271507:18@CLIENT XrootdResponse: 0000
sending 16 data bytes
180426 10:20:15 4249 XrootdXeq: schroete.271507:18@CLIENT pvt IPv4 login
180426 10:20:15 4249 schroete.271507:18@CLIENT XrootdProtocol: 0100
req=rm dlen=26
180426 10:20:15 4249 schroete.271507:18@CLIENT ofs_remove: f
fn=/xrootd/schroete/willi.dat
180426 10:20:15 4079 Receive glogin1 19 bytes on 7167
180426 10:20:15 4079 Decode glogin1 redirects schroete.271507:18@CLIENT
to 192.168.16.217:1094 /xrootd/schroete/willi.dat
180426 10:20:15 4249 schroete.271507:18@CLIENT XrootdProtocol: 0100
rc=-256 rm /xrootd/schroete/willi.dat
180426 10:20:15 4249 schroete.271507:18@CLIENT XrootdProtocol: 0100
redirecting to 192.168.16.217:1094
180426 10:20:15 4249 schroete.271507:18@CLIENT XrootdResponse: 0100
sending 18 data bytes; status=4004
180426 10:20:15 4249 schroete.271507:18@CLIENT XrootdProtocol: 0100
req=rm dlen=62
180426 10:20:15 4249 schroete.271507:18@CLIENT ofs_remove: f
fn=/xrootd/schroete/willi.dat
180426 10:20:15 4079 Receive glogin1 52 bytes on 8191
180426 10:20:15 4079 Decode glogin1 gave schroete.271507:18@CLIENT err
-2 'Unable to write file; eligible servers shunned.'
/xrootd/schroete/willi.dat
180426 10:20:15 4249 schroete.271507:18@CLIENT XrootdProtocol: 0100
rc=-1 rm /xrootd/schroete/willi.dat
180426 10:20:15 4249 schroete.271507:18@CLIENT XrootdResponse: 0100
sending err 3011: Unable to write file; eligible servers shunned.
180426 10:20:15 4249 XrootdXeq: schroete.271507:18@CLIENT disc 0:00:00
180426 10:20:15 4249 schroete.271507:18@CLIENT XrdPoll: FD 18 detached
from poller 2; num=0
```


Tryint to copy with xrdcp tool:
schroete@CLIENT:~$ xrdcp MetopA.sh
xroot://glogin1//xrootd/schroete/willi.dat
[0B/0B][100%][==================================================][0B/s]
Run: [ERROR] Server responded with an error: [3011] Unable to create new
file; file already exists.180426

```bash
180426 10:21:03 4071 XrdSched: running h21.271390:19@CLIENT inq=0
180426 10:21:03 4071 XrootdXeq: h21.271390:19@CLIENT disc 0:05:37
180426 10:21:03 4071 h21.271390:19@CLIENT XrdPoll: FD 19 detached from
poller 1; num=0
180426 10:21:03 4072 XrdSched: running root.271390:7@CLIENT inq=0
180426 10:21:03 4072 XrootdXeq: root.271390:7@CLIENT disc 0:05:42
180426 10:21:03 4072 root.271390:7@CLIENT XrdPoll: FD 7 detached from
poller 0; num=0
180426 10:21:05 4247 XrdInet: Accepted connection from 21@CLIENT
180426 10:21:05 4247 XrdProtocol: matched protocol xrootd
180426 10:21:05 4247 ?:21@CLIENT XrdPoll: FD 21 attached to poller 0; num=1
180426 10:21:05 4247 ?:21@CLIENT XrootdProtocol: 0000 req=login dlen=101
180426 10:21:05 4247 schroete.271528:21@CLIENT XrootdResponse: 0000
sending 16 data bytes
180426 10:21:05 4247 XrootdXeq: schroete.271528:21@CLIENT pvt IPv4 login
180426 10:21:05 4249 XrdSched: running main accept inq=0
180426 10:21:05 4247 schroete.271528:21@CLIENT XrootdProtocol: 0100
req=stat dlen=26
180426 10:21:05 4247 schroete.271528:21@CLIENT ofs_stat:
fn=/xrootd/schroete/willi.dat
180426 10:21:05 4079 Receive glogin1 19 bytes on 9215
180426 10:21:05 4079 Decode glogin1 redirects schroete.271528:21@CLIENT
to 192.168.16.217:1094 /xrootd/schroete/willi.dat
180426 10:21:05 4247 schroete.271528:21@CLIENT XrootdProtocol: 0100
rc=-256 stat /xrootd/schroete/willi.dat
180426 10:21:05 4247 schroete.271528:21@CLIENT XrootdProtocol: 0100
redirecting to 192.168.16.217:1094
180426 10:21:05 4247 schroete.271528:21@CLIENT XrootdResponse: 0100
sending 18 data bytes; status=4004
180426 10:21:05 4247 schroete.271528:21@CLIENT XrootdProtocol: 0100
req=stat dlen=62
180426 10:21:05 4247 schroete.271528:21@CLIENT ofs_stat:
fn=/xrootd/schroete/willi.dat
180426 10:21:05 4079 Receive glogin1 47 bytes on 10239
180426 10:21:05 4079 Decode glogin1 gave schroete.271528:21@CLIENT err
-2 'No servers are available to read the file.' /xrootd/schroete/willi.dat
180426 10:21:05 4247 schroete.271528:21@CLIENT XrootdProtocol: 0100
rc=-1 stat /xrootd/schroete/willi.dat
180426 10:21:05 4247 schroete.271528:21@CLIENT XrootdResponse: 0100
sending err 3011: No servers are available to read the file.
180426 10:21:05 4247 schroete.271528:21@CLIENT XrootdProtocol: 0100
req=open dlen=40
180426 10:21:05 4247 schroete.271528:21@CLIENT XrootdProtocol: 0100 open
unmat /xrootd/schroete/willi.dat?oss.asize=226
180426 10:21:05 4247 schroete.271528:21@CLIENT ofs_open: 102-40644
fn=/xrootd/schroete/willi.dat
180426 10:21:05 4079 Receive glogin1 4 bytes on 11263
180426 10:21:05 4079 Decode glogin1 delays schroete.271528:21@CLIENT 5
/xrootd/schroete/willi.dat
180426 10:21:05 4247 schroete.271528:21@CLIENT XrootdProtocol: 0100
stalling client for 5 sec
180426 10:21:05 4247 schroete.271528:21@CLIENT XrootdResponse: 0100
sending 4 data bytes; status=4005
180426 10:21:05 4247 schroete.271528:21@CLIENT ofs_close: use=0 fn=dummy
180426 10:21:08 4247 schroete.271528:21@CLIENT XrootdProtocol: 0100
request timeout; read 0 of 24 bytes
180426 10:21:08 4247 XrdPoll: Poller 0 enabled schroete.271528:21@CLIENT
180426 10:21:10 4071 XrdSched: running schroete.271528:21@CLIENT inq=0
180426 10:21:10 4071 schroete.271528:21@CLIENT XrootdProtocol: 0100
req=open dlen=40
180426 10:21:10 4071 schroete.271528:21@CLIENT XrootdProtocol: 0100 open
unmat /xrootd/schroete/willi.dat?oss.asize=226
180426 10:21:10 4071 schroete.271528:21@CLIENT ofs_open: 102-40644
fn=/xrootd/schroete/willi.dat
180426 10:21:10 4079 Receive glogin1 52 bytes on 12287
180426 10:21:10 4079 Decode glogin1 gave schroete.271528:21@CLIENT err
-2 'Unable to create new file; file already exists.'
/xrootd/schroete/willi.dat
180426 10:21:10 4071 schroete.271528:21@CLIENT XrootdResponse: 0100
sending err 3011: Unable to create new file; file already exists.
180426 10:21:10 4071 schroete.271528:21@CLIENT ofs_close: use=0 fn=dummy
180426 10:21:10 4071 XrootdXeq: schroete.271528:21@CLIENT disc 0:00:05
180426 10:21:10 4071 schroete.271528:21@CLIENT XrdPoll: FD 21 detached
from poller 0; num=0
180426 10:22:23 4069 XrdBuffManager: Reshaper has 3K; target 403877K
```

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