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[Kevin O'Gorman <kogorman@xxxxxxxxx>]

Public bug reported:

I have a pipeline of about 2 dozen commands that I expect will run for
2-3 weeks, with top running concurrently in another window.  They are
compute-intensive, and there is always at least one one that is running
and sometimes more.  In spite of this after several days, top stopped
reporting any of them, whether or not I have top showing idle tasks
(when showing idle tasks, it's possible they scrolled off the screen,
when those are not shown, there are only 6 or so processes seen).

I stopped top and restarted, and the 2 running processes immediately
appeared.  I conclude that for some reason, top had lost track of them
in some way.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: procps 1:3.3.9-1ubuntu2.2
ProcVersionSignature: Ubuntu 3.16.0-50.67~14.04.1-generic 3.16.7-ckt16
Uname: Linux 3.16.0-50-generic x86_64
ApportVersion: 2.14.1-0ubuntu3.15
Architecture: amd64
Date: Thu Oct 15 15:48:52 2015
InstallationDate: Installed on 2015-07-06 (101 days ago)
InstallationMedia: Xubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
SourcePackage: procps
UpgradeStatus: No upgrade log present (probably fresh install)
modified.conffile..etc.sysctl.conf: [modified]
mtime.conffile..etc.sysctl.conf: 2015-09-07T13:46:27.714670

** Affects: procps (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug trusty

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https://bugs.launchpad.net/bugs/1506669

Title:
  top loses track of processes when running a very long time

Status in procps package in Ubuntu:
  New

Bug description:
  I have a pipeline of about 2 dozen commands that I expect will run for
  2-3 weeks, with top running concurrently in another window.  They are
  compute-intensive, and there is always at least one one that is
  running and sometimes more.  In spite of this after several days, top
  stopped reporting any of them, whether or not I have top showing idle
  tasks (when showing idle tasks, it's possible they scrolled off the
  screen, when those are not shown, there are only 6 or so processes
  seen).

  I stopped top and restarted, and the 2 running processes immediately
  appeared.  I conclude that for some reason, top had lost track of them
  in some way.

  ProblemType: Bug
  DistroRelease: Ubuntu 14.04
  Package: procps 1:3.3.9-1ubuntu2.2
  ProcVersionSignature: Ubuntu 3.16.0-50.67~14.04.1-generic 3.16.7-ckt16
  Uname: Linux 3.16.0-50-generic x86_64
  ApportVersion: 2.14.1-0ubuntu3.15
  Architecture: amd64
  Date: Thu Oct 15 15:48:52 2015
  InstallationDate: Installed on 2015-07-06 (101 days ago)
  InstallationMedia: Xubuntu 14.04.2 LTS "Trusty Tahr" - Release amd64 (20150218.1)
  SourcePackage: procps
  UpgradeStatus: No upgrade log present (probably fresh install)
  modified.conffile..etc.sysctl.conf: [modified]
  mtime.conffile..etc.sysctl.conf: 2015-09-07T13:46:27.714670

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