[Duplicity-talk] duplicity +par2 hangs (or so it seems)

[harry]

So I installed duplicity from the newest source, installed par2, and 
am now testing it on a virtual machine. The command line command is:

$ duplicity /source par2+pexpect+scp://<user>:<pass>@<ip>//<destination>

and it was started some 10 hours ago (09:49 on May 13th). 
(It's now 20:30) Since then it has created some
duplicity-??????-tempdir instances in its temp dir in which some 
contain what seems to be a simlink to a file
duplicity-full.20170513T103013Z.vol1.difftar.gpg

Those links look like:

duplicity-full.20170513T103013Z.vol1.difftar.gpg
-> /<path>/temp/duplicity-ZIgjka-tempdir/mktemp-Flkw6b-2

while:

ls -ahlrt .temp/duplicity-ZIgjka-tempdir
total 16K
drwx------  2 user user 4.0K May 13 09:49 duplicity_temp.1
drwx------  2 user user 4.0K May 13 09:50 duplicity_temp.2
drwx------  4 user user 4.0K May 13 09:50 .
drwxrwxr-x 11 user user 4.0K May 13 12:01 ..

And we can see there is no 'mktemp-Flkw6b-2 there.

There is one file however that's large:

$ ls -ahlrt /<path>/temp/duplicity-ZI69Av-tempdir/
total 201M
-rw-------  1 user user    0 May 13 12:01 mkstemp-wMMrVz-1
drwxrwxr-x 11 user user 4.0K May 13 12:01 ..
-rw-------  1 user user 201M May 13 12:02 mktemp-sZhQ3Y-2
drwx------  3 user user 4.0K May 13 12:02 .
drwx------  2 user user 4.0K May 13 12:02 duplicity_temp.1

And ps aux gives us an entry:
0.0  0.2  73608  2380 pts/5    Ss+  12:02   0:00 /bin/scp
-oServerAliveInterval=15 -oServerAliveCountMax=2 
/home/user/.temp/duplicity-ZI69Av-tempdir/mktemp-sZhQ3Y-2
<user>@<ip>:/<path>/duplicity/duplicity-test+par2/<destination>/
duplicity-full.20170513T120145Z.vol1.difftar.gpg

You can see the 'transfer' has started at 12:02 and seems to be 
a bit active still (CPU 0.2%). However, at the target the 
destination directory is still completely empty:
$ ls -hl <path>/duplicity/duplicity-test+par2/<destination>
total 0

What seems to be going on here?

Harry