yahoo-eng-team team mailing list archive

[junbo <1907411@xxxxxxxxxxxxxxxxxx>]

Public bug reported:

the https://bugs.launchpad.net/neutron/+bug/1870313 fix the code to use
threading to send grap, well the grap works, but it also introduced
another very seriously bug file descriptor leak!

I tested the train, ussuri branches, both can reproduce the bug, the
reproduce steps is simple, just create floating ip with --port option,
which trigger the l3-agent to configure ip address on qg- interface,
then the neutron-keepalived-state-change will send garp, AND there is
file named "anon_inode:[eventpoll]" left in /proc/<pid of neutron-
keepalived-state-change >/fd.

AS you can imagine, frequently create floating ip and delete floating
ip, what will happen in /proc/X/fd

this could also cause the memory leak in some cases, cause the process
neutron-keepalived-state-change consume huge memory like 10G+

** Affects: neutron
     Importance: Undecided
     Assignee: junbo (junbo)
         Status: New

** Changed in: neutron
     Assignee: (unassigned) => junbo (junbo)

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https://bugs.launchpad.net/bugs/1907411

Title:
  neutron-keepalived-state-change file descriptor leak

Status in neutron:
  New

Bug description:
  the https://bugs.launchpad.net/neutron/+bug/1870313 fix the code to
  use threading to send grap, well the grap works, but it also
  introduced another very seriously bug file descriptor leak!

  I tested the train, ussuri branches, both can reproduce the bug, the
  reproduce steps is simple, just create floating ip with --port option,
  which trigger the l3-agent to configure ip address on qg- interface,
  then the neutron-keepalived-state-change will send garp, AND there is
  file named "anon_inode:[eventpoll]" left in /proc/<pid of neutron-
  keepalived-state-change >/fd.

  AS you can imagine, frequently create floating ip and delete floating
  ip, what will happen in /proc/X/fd

  this could also cause the memory leak in some cases, cause the process
  neutron-keepalived-state-change consume huge memory like 10G+

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