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[Vasyl Saienko <vsaienko@xxxxxxxxxxxx>]

Public bug reported:

>From time to time apache failed to restart with init script when
keystone wsgi application is running.

There is steps how to reproduce it:

launch apache start/stop in cycle
while :; do service apache2 stop; service apache2 start; done

after sime time apache failed to start, because it can't bind to opened socket:
 * Starting web server apache2
 *
 * Stopping web server apache2
 *
 * Starting web server apache2
 *
 * Stopping web server apache2
 *
 * Starting web server apache2
(98)Address already in use: AH00072: make_sock: could not bind to address [::]:35357
(98)Address already in use: AH00072: make_sock: could not bind to address 0.0.0.0:35357
no listening sockets available, shutting down
AH00015: Unable to open logs
Action 'start' failed.
The Apache error log may have more information.
 *
 * The apache2 instance did not start within 20 seconds. Please read the log files to discover problems
 * Stopping web server apache2
 *
 * Starting web server apache2
 *
 * Stopping web server apache2

Without keystone wsgi application, I can't reproduce error in 12 hours.
horizon and radosgw wsgi were enabled.

It look like root cause is in keystone wsgi application itself.

** Affects: keystone
     Importance: Undecided
         Status: New

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https://bugs.launchpad.net/bugs/1484836

Title:
  apache failed to restart with keystone wsgi app

Status in Keystone:
  New

Bug description:
  From time to time apache failed to restart with init script when
  keystone wsgi application is running.

  There is steps how to reproduce it:

  launch apache start/stop in cycle
  while :; do service apache2 stop; service apache2 start; done

  after sime time apache failed to start, because it can't bind to opened socket:
   * Starting web server apache2
   *
   * Stopping web server apache2
   *
   * Starting web server apache2
   *
   * Stopping web server apache2
   *
   * Starting web server apache2
  (98)Address already in use: AH00072: make_sock: could not bind to address [::]:35357
  (98)Address already in use: AH00072: make_sock: could not bind to address 0.0.0.0:35357
  no listening sockets available, shutting down
  AH00015: Unable to open logs
  Action 'start' failed.
  The Apache error log may have more information.
   *
   * The apache2 instance did not start within 20 seconds. Please read the log files to discover problems
   * Stopping web server apache2
   *
   * Starting web server apache2
   *
   * Stopping web server apache2

  Without keystone wsgi application, I can't reproduce error in 12
  hours. horizon and radosgw wsgi were enabled.

  It look like root cause is in keystone wsgi application itself.

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