ValueError: need more than 1 value to unpack

[chetankabra]

Description
I am running glances as a service using systemd on "Red Hat Enterprise Linux Server 7.5 (Maipo)" OS .
using Below command
.env/bin/python .env/bin/glances --quiet --export influxdb -C glances.conf

For an enhancement or new feature: Describe your needs.

Versions
Glances & psutil (glances -V): Glances v3.0.2 with psutil v5.4.7
Operating System (lsb_release -a): Red Hat Enterprise Linux Server 7.5 (Maipo)

Logs
Below is the service status.

proc.info = proc.as_dict(attrs=attrs, ad_value=ad_value)
File "/var/data/monitoring-ui/.env/lib/python2.7/site-packages/psutil/init.py", line 526, in as_dict
ret = meth()
File "/var/data/monitoring-ui/.env/lib/python2.7/site-packages/psutil/init.py", line 750, in io_counters
return self._proc.io_counters()
File "/var/data/monitoring-ui/.env/lib/python2.7/site-packages/psutil/_pslinux.py", line 1459, in wrapper
return fun(self, *args, **kwargs)
File "/var/data/monitoring-ui/.env/lib/python2.7/site-packages/psutil/_pslinux.py", line 1604, in io_counters
name, value = line.split(b': ')
ValueError: need more than 1 value to unpack

[nicolargo]

@chetankabra thanks for the report.

The problem is in the PsUtil lib.

@giampaolo : It look like the giampaolo/psutil#1004 is back...

Note: related to #1183 (i close the other issue to only have one issue for this PsUtil problem).

[giampaolo]

Can you put a print(line) statement before the culprit line in psutil/_pslinux.py?

[giampaolo]

Alternatively also cat /proc/self/io is fine.

[chetankabra]

rchar: 2012
wchar: 0
syscr: 7
syscw: 0
read_bytes: 0
write_bytes: 0
cancelled_write_bytes: 0

[giampaolo]

That looks fine so probably the problem occurs for a specific PID only. Can you identify the culprit PID and do cat /proc/{PID}/io?

[chetankabra]

Hi @giampaolo ,

I have edited psutil/_pslinux.py to see the results: PFA
proc.info = proc.as_dict(attrs=attrs, ad_value=ad_value)
File "/var/data/monitoring-ui/.env/lib/python2.7/site-packages/psutil/init.py", line 526, in as_dict
ret = meth()
File "/var/data/monitoring-ui/.env/lib/python2.7/site-packages/psutil/init.py", line 750, in io_counters
return self._proc.io_counters()
File "/var/data/monitoring-ui/.env/lib/python2.7/site-packages/psutil/_pslinux.py", line 1459, in wrapper
return fun(self, *args, **kwargs)
File "/var/data/monitoring-ui/.env/lib/python2.7/site-packages/psutil/_pslinux.py", line 1605, in io_counters
raise ValueError(line)
ValueError: 0

Thanks,
Chetan K

[giampaolo]

Please add this:

with open_binary(fname) as fd:
     print(repr(fd.read())

(I want to see the content of the file)

[chetankabra]

Hi Giampaolo,

Contents of the files:

ValueError: ['rchar: 120', 'wchar: 1153', 'syscr: 9', 'syscw: 17', 'read_bytes: 0', 'write_bytes: 0', 'cancelled_write_bytes: 0', ' 0']

[giampaolo]

OK, I should have fixed this in giampaolo/psutil@7300bd4. If you want to confirm you can install latest psutil version from GIT/master but I think it's good.

[nicolargo]

Thanks to both of you !