error while copying with a local xrootd server (due to hash?)

[kiderrien]

I generated a local server with an adler32 checksum. When copying a file, this type of error is obtained :

client:

[userxroot@resticrclone3 rclone]$ rclone -vv copy /tmp/back2/adler xrootd:back2/p --checksum
2020/07/03 10:13:47 DEBUG : large: Hash:path= /tmp/back2/p/large
panic: mux: cannot find data waiter for id [0 0]

goroutine 187 [running]:
go-hep.org/x/hep/xrootd.(*cliSession).consume(0xc0002a4c30)
        /home/userxroot/go/pkg/mod/go-hep.org/x/[email protected]/xrootd/session.go:258 +0x3f7
created by go-hep.org/x/hep/xrootd.newSession
        /home/userxroot/go/pkg/mod/go-hep.org/x/[email protected]/xrootd/session.go:103 +0x2c6

Server :

00703 10:13:47 21170 XrootdXeq: .21345:25@localhost unbind 0:00:00
200703 10:13:47 21170 XrdPoll: Unable to exclude fd 25 during disc (0) event; link .21345:25@localhost; no such file or directory
200703 10:13:47 21170 XrootdXeq: .21345:31@localhost unbind 0:00:00
200703 10:13:47 21168 XrootdXeq: .21345:34@localhost disc 0:00:00
200703 10:13:47 21087 XrdLink: Unable to receive from .21345:19@localhost; connection reset by peer
200703 10:13:47 21172 XrdLink: Unable to receive from .21345:24@localhost; connection reset by peer
200703 10:13:47 21087 XrootdXeq: .21345:19@localhost disc 0:00:00 (link read error)
200703 10:13:47 21087 XrdPoll: Unable to exclude fd 19 during disc (0) event; link .21345:19@localhost; no such file or directory
200703 10:13:47 21172 XrootdXeq: .21345:24@localhost disc 0:00:00 (link read error)
200703 10:13:47 21172 XrootdXeq: .21345:23@localhost unbind 0:00:00
200703 10:13:47 21172 XrootdXeq: .21345:29@localhost unbind 0:00:00
200703 10:13:47 21172 XrdPoll: Unable to exclude fd 24 during disc (0) event; link .21345:24@localhost; no such file or directory

This error seems to come from the hash function.

When copying for a file only it works but there is a hash problem:

2020/07/03 11:09:12 DEBUG : test3: Using hash function with hash.Type= Adler32Hash
2020/07/03 11:09:12 DEBUG : test3: Hash:path= /tmp/back2/p/test3
2020/07/03 11:09:12 DEBUG : test3: Hash: o.Hash=  && Data=  �XJob scheduled.

Data= �XJob scheduled
Normally Data = adler32 224d3ec3
This is the same problem with a local xrootd server configured with the md5 checksum

However the copy works well with the remote xrootd server using adler32.

[kiderrien]

It does not seem to succeed in finding the file that the path indicates when copying to the local server while the remote does not have this problem during a copy.
The request for the checksum returns "�XJob scheduled" when it does not find the file.

[kiderrien]

ok. the issue is that currently go-hep/xrootd doesn't handle async responses (ie: kXR_attn server responses) at all.

See here.