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process with no cmd are shown with no name #2315

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rade opened this issue Mar 9, 2017 · 0 comments
Closed

process with no cmd are shown with no name #2315

rade opened this issue Mar 9, 2017 · 0 comments
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bug Broken end user or developer functionality; not working as the developers intended it
Milestone
1.3

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rade commented Mar 9, 2017

Launch scope on your machine (or look at pretty much any instance in Weave Cloud), bring up a host details panel, and look at the list of processes. Observe that many process names are blank.

screenshot_2017-03-09_13-19-19

Contrast with ps:

root     27901  0.0  0.0      0     0 ?        S    13:09   0:00 [kworker/2:2]

That's probably because

# cat /proc/27901/cmdline 
# cat /proc/27901/comm
kworker/2:2
@rade rade added the bug Broken end user or developer functionality; not working as the developers intended it label Mar 9, 2017
@2opremio 2opremio added this to the 1.3 milestone Mar 9, 2017
@rade rade self-assigned this Mar 9, 2017
rade added a commit that referenced this issue Mar 9, 2017
@rade
fall back to /proc/<pid>/comm for process name
245c2e9 
when proc/<pid>/cmdline is empty, which is the case for some system
and defunct processes.

Fixes #2315
@rade rade mentioned this issue Mar 9, 2017
Merged
@rade rade closed this as completed in #2316 Mar 9, 2017
rade added a commit that referenced this issue Mar 9, 2017
@rade
Merge pull request #2316 from weaveworks/2315-empty-proc-cmdline
456ac0b 
fall back to /proc/<pid>/comm for process name

Fixes #2315
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@rade @2opremio