system-upgrade download fails after power failure

[Ewan Slater]

Hi,

I'm trying to upgrade from 27 -> 28.

Yesterday I was running `sudo dnf system-upgrade download --releasever=28` when I had a power failure.

After I got power back, I tried to run it again I get the trace below.

I have tried repeating the process again from `sudo dnf upgrade --refresh` and removing and reinstalling system-upgrade, but I still get the same message.

Any suggestions on how to get round this?

Cheers,

Ewan

[ewan@headcrash ~]$ sudo dnf system-upgrade download --releasever=28
Traceback (most recent call last):
  File "/bin/dnf", line 58, in <module>
    main.user_main(sys.argv[1:], exit_code=True)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 179, in user_main
    errcode = main(args)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 64, in main
    return _main(base, args, cli_class, option_parser_class)
  File "/usr/lib/python3.6/site-packages/dnf/cli/main.py", line 95, in _main
    cli.configure(list(map(ucd, args)), option_parser())
  File "/usr/lib/python3.6/site-packages/dnf/cli/cli.py", line 860, in configure
    self._parse_commands(opts, args)
  File "/usr/lib/python3.6/site-packages/dnf/cli/cli.py", line 783, in _parse_commands
    self.command = command_cls(self)
  File "/usr/lib/python3.6/site-packages/dnf-plugins/system_upgrade.py", line 292, in __init__
    self.state = State()
  File "/usr/lib/python3.6/site-packages/dnf-plugins/system_upgrade.py", line 109, in __init__
    self._read()
  File "/usr/lib/python3.6/site-packages/dnf-plugins/system_upgrade.py", line 114, in _read
    self._data = json.load(fp)
  File "/usr/lib64/python3.6/json/__init__.py", line 299, in load
    parse_constant=parse_constant, object_pairs_hook=object_pairs_hook, **kw)
  File "/usr/lib64/python3.6/json/__init__.py", line 354, in loads
    return _default_decoder.decode(s)
  File "/usr/lib64/python3.6/json/decoder.py", line 339, in decode
    obj, end = self.raw_decode(s, idx=_w(s, 0).end())
  File "/usr/lib64/python3.6/json/decoder.py", line 357, in raw_decode
    raise JSONDecodeError("Expecting value", s, err.value) from None
json.decoder.JSONDecodeError: Expecting value: line 1 column 1 (char 0)

[Sam Varshavchik]

Ewan Slater writes:
> Hi,
>
> I'm trying to upgrade from 27 -> 28.
>
> Yesterday I was running `sudo dnf system-upgrade download --releasever=28`  
> when I had a power failure.
>
> After I got power back, I tried to run it again I get the trace below.
>
> I have tried repeating the process again from `sudo dnf upgrade --refresh`  
> and removing and reinstalling system-upgrade, but I still get the same  
> message.
>
> Any suggestions on how to get round this?

Try dnf system-upgrade clean

[Ewan Slater]

@Sam - thanks, but it gives the same error.

[Sam Varshavchik]

Ewan Slater writes:
> @Sam - thanks, but it gives the same error.

rm -rf /var/lib/dnf/system-upgrade*
dnf clean all

If this is still doesn't work, something else is broken, not just dnf.

[Ewan Slater]

That helped after a few goes.

The full story was:

1.  sudo dnf remove system-upgrade
2.  rm -rf /var/lib/dnf/system-upgrade*
3.  dnf clean all
4.  reboot
5.  start again

It needed the reboot.

It's running now (fingers crossed).

Many thanks :-)

[Samuel Sieb]

On 12/7/18 3:15 AM, Ewan Slater wrote:
> I'm trying to upgrade from 27 -> 28.
>
> Yesterday I was running `sudo dnf system-upgrade download --releasever=28` when I had a power failure.
>
> After I got power back, I tried to run it again I get the trace below.
>
> I have tried repeating the process again from `sudo dnf upgrade --refresh` and removing and reinstalling system-upgrade, but I still get the same message.
>
> Any suggestions on how to get round this?

Try deleting everything in /var/lib/dnf/system-upgrade or just start 
with any json files you find in there to save the packages you have 
already downloaded.

[Matthew Miller]

On Fri, Dec 07, 2018 at 11:15:13AM -0000, Ewan Slater wrote:
> I have tried repeating the process again from `sudo dnf upgrade --refresh` and removing and reinstalling system-upgrade, but I still get the same message.
> Any suggestions on how to get round this?

What does `dnf check` return?

[Ewan Slater]

nothing (blank line).

[Patrick O'Callaghan]

On Sat, 2018-12-08 at 13:17 +0000, Ewan Slater wrote:
> nothing (blank line).

Kindly quote some context when replying. HyperKitty doesn't do this by
default. Or use a real email client.

poc