[Yahoo-eng-team] [Bug 1376211] Re: Retry mechanism does not work on startup when used with MySQL

2016-06-09 Thread Dmitry Mescheryakov 
The fix was ported to Juno here -
https://review.openstack.org/#/c/126732/

** Changed in: oslo.db/juno
   Status: Confirmed => Fix Released

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Title:
  Retry mechanism does not work on startup when used with MySQL

Status in neutron:
  Invalid
Status in oslo.db:
  Fix Released
Status in oslo.db juno series:
  Fix Released

Bug description:
  This is initially revealed as Red Hat bug:
  https://bugzilla.redhat.com/show_bug.cgi?id=1144181

  The problem shows up when Neutron or any other oslo.db based projects
  start while MySQL server is not up yet. Instead of retrying connection
  as per max_retries and retry_interval, service just crashes with
  return code 1.

  This is because during engine initialization, "engine.execute("SHOW
  VARIABLES LIKE 'sql_mode'")" is called, which opens the connection,
  *before* _test_connection() succeeds. So the server just bail out to
  sys.exit() at the top of the stack.

  This behaviour was checked for both oslo.db 0.4.0 and 1.0.1.

  I suspect this is a regression from the original db code from oslo-
  incubator though I haven't checked it specifically.

  The easiest way to reproduce the traceback is:

  1. stop MariaDB.
  2. execute the following Python script:

  '''
  import oslo.db.sqlalchemy.session

  url = 'mysql://neutron:123456@10.35.161.235/neutron'
  engine = oslo.db.sqlalchemy.session.EngineFacade(url)
  '''

  The following traceback can be seen in service log:

  2014-10-01 13:46:10.588 5812 TRACE neutron Traceback (most recent call last):
  2014-10-01 13:46:10.588 5812 TRACE neutron   File "/usr/bin/neutron-server", 
line 10, in 
  2014-10-01 13:46:10.588 5812 TRACE neutron sys.exit(main())
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
"/usr/lib/python2.7/site-packages/neutron/server/__init__.py", line 47, in main
  2014-10-01 13:46:10.588 5812 TRACE neutron neutron_api = 
service.serve_wsgi(service.NeutronApiService)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
"/usr/lib/python2.7/site-packages/neutron/service.py", line 105, in serve_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron LOG.exception(_('Unrecoverable 
error: please check log '
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
"/usr/lib/python2.7/site-packages/neutron/openstack/common/excutils.py", line 
82, in __exit__
  2014-10-01 13:46:10.588 5812 TRACE neutron six.reraise(self.type_, 
self.value, self.tb)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
"/usr/lib/python2.7/site-packages/neutron/service.py", line 102, in serve_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron service.start()
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
"/usr/lib/python2.7/site-packages/neutron/service.py", line 73, in start
  2014-10-01 13:46:10.588 5812 TRACE neutron self.wsgi_app = 
_run_wsgi(self.app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
"/usr/lib/python2.7/site-packages/neutron/service.py", line 168, in _run_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron app = 
config.load_paste_app(app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
"/usr/lib/python2.7/site-packages/neutron/common/config.py", line 182, in 
load_paste_app
  2014-10-01 13:46:10.588 5812 TRACE neutron app = 
deploy.loadapp("config:%s" % config_path, name=app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
"/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 247, in 
loadapp
  2014-10-01 13:46:10.588 5812 TRACE neutron return loadobj(APP, uri, 
name=name, **kw)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
"/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 272, in 
loadobj
  2014-10-01 13:46:10.588 5812 TRACE neutron return context.create()
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
"/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 710, in create
  2014-10-01 13:46:10.588 5812 TRACE neutron return 
self.object_type.invoke(self)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
"/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 144, in invoke
  2014-10-01 13:46:10.588 5812 TRACE neutron **context.local_conf)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
"/usr/lib/python2.7/site-packages/paste/deploy/util.py", line 56, in fix_call
  2014-10-01 13:46:10.588 5812 TRACE neutron val = callable(*args, **kw)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
"/usr/lib/python2.7/site-packages/paste/urlmap.py", line 25, in urlmap_factory
  2014-10-01 13:46:10.588 5812 TRACE neutron app = loader.get_app(app_name, 
global_conf=global_conf)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
"/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py", line 350, in 
get_app
  2014-10-01 13:46:10.588 5812 TRACE neutron name=name,

[Yahoo-eng-team] [Bug 1376211] Re: Retry mechanism does not work on startup when used with MySQL

2015-03-31 Thread Kyle Mestery 
Per discussion above, marking this bug as Invalid for Neutron. It
looks to be fixed in oslo.db and the bug was in fact in oslo.db.

** Changed in: neutron
   Status: Confirmed = Invalid

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Title:
  Retry mechanism does not work on startup when used with MySQL

Status in OpenStack Neutron (virtual network service):
  Invalid
Status in Oslo Database library:
  Fix Released
Status in oslo.db juno series:
  Confirmed

Bug description:
  This is initially revealed as Red Hat bug:
  https://bugzilla.redhat.com/show_bug.cgi?id=1144181

  The problem shows up when Neutron or any other oslo.db based projects
  start while MySQL server is not up yet. Instead of retrying connection
  as per max_retries and retry_interval, service just crashes with
  return code 1.

  This is because during engine initialization, engine.execute(SHOW
  VARIABLES LIKE 'sql_mode') is called, which opens the connection,
  *before* _test_connection() succeeds. So the server just bail out to
  sys.exit() at the top of the stack.

  This behaviour was checked for both oslo.db 0.4.0 and 1.0.1.

  I suspect this is a regression from the original db code from oslo-
  incubator though I haven't checked it specifically.

  The easiest way to reproduce the traceback is:

  1. stop MariaDB.
  2. execute the following Python script:

  '''
  import oslo.db.sqlalchemy.session

  url = 'mysql://neutron:123456@10.35.161.235/neutron'
  engine = oslo.db.sqlalchemy.session.EngineFacade(url)
  '''

  The following traceback can be seen in service log:

  2014-10-01 13:46:10.588 5812 TRACE neutron Traceback (most recent call last):
  2014-10-01 13:46:10.588 5812 TRACE neutron   File /usr/bin/neutron-server, 
line 10, in module
  2014-10-01 13:46:10.588 5812 TRACE neutron sys.exit(main())
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/server/__init__.py, line 47, in main
  2014-10-01 13:46:10.588 5812 TRACE neutron neutron_api = 
service.serve_wsgi(service.NeutronApiService)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 105, in serve_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron LOG.exception(_('Unrecoverable 
error: please check log '
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/openstack/common/excutils.py, line 
82, in __exit__
  2014-10-01 13:46:10.588 5812 TRACE neutron six.reraise(self.type_, 
self.value, self.tb)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 102, in serve_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron service.start()
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 73, in start
  2014-10-01 13:46:10.588 5812 TRACE neutron self.wsgi_app = 
_run_wsgi(self.app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 168, in _run_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron app = 
config.load_paste_app(app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/common/config.py, line 182, in 
load_paste_app
  2014-10-01 13:46:10.588 5812 TRACE neutron app = 
deploy.loadapp(config:%s % config_path, name=app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 247, in 
loadapp
  2014-10-01 13:46:10.588 5812 TRACE neutron return loadobj(APP, uri, 
name=name, **kw)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 272, in 
loadobj
  2014-10-01 13:46:10.588 5812 TRACE neutron return context.create()
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 710, in create
  2014-10-01 13:46:10.588 5812 TRACE neutron return 
self.object_type.invoke(self)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 144, in invoke
  2014-10-01 13:46:10.588 5812 TRACE neutron **context.local_conf)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/util.py, line 56, in fix_call
  2014-10-01 13:46:10.588 5812 TRACE neutron val = callable(*args, **kw)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/urlmap.py, line 25, in urlmap_factory
  2014-10-01 13:46:10.588 5812 TRACE neutron app = loader.get_app(app_name, 
global_conf=global_conf)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 350, in 
get_app
  2014-10-01 13:46:10.588 5812

[Yahoo-eng-team] [Bug 1376211] Re: Retry mechanism does not work on startup when used with MySQL

2014-11-18 Thread Victor Sergeyev 
** Changed in: oslo.db
   Status: Fix Committed = Fix Released

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Title:
  Retry mechanism does not work on startup when used with MySQL

Status in OpenStack Neutron (virtual network service):
  Confirmed
Status in Oslo Database library:
  Fix Released
Status in oslo.db juno series:
  Confirmed

Bug description:
  This is initially revealed as Red Hat bug:
  https://bugzilla.redhat.com/show_bug.cgi?id=1144181

  The problem shows up when Neutron or any other oslo.db based projects
  start while MySQL server is not up yet. Instead of retrying connection
  as per max_retries and retry_interval, service just crashes with
  return code 1.

  This is because during engine initialization, engine.execute(SHOW
  VARIABLES LIKE 'sql_mode') is called, which opens the connection,
  *before* _test_connection() succeeds. So the server just bail out to
  sys.exit() at the top of the stack.

  This behaviour was checked for both oslo.db 0.4.0 and 1.0.1.

  I suspect this is a regression from the original db code from oslo-
  incubator though I haven't checked it specifically.

  The easiest way to reproduce the traceback is:

  1. stop MariaDB.
  2. execute the following Python script:

  '''
  import oslo.db.sqlalchemy.session

  url = 'mysql://neutron:123456@10.35.161.235/neutron'
  engine = oslo.db.sqlalchemy.session.EngineFacade(url)
  '''

  The following traceback can be seen in service log:

  2014-10-01 13:46:10.588 5812 TRACE neutron Traceback (most recent call last):
  2014-10-01 13:46:10.588 5812 TRACE neutron   File /usr/bin/neutron-server, 
line 10, in module
  2014-10-01 13:46:10.588 5812 TRACE neutron sys.exit(main())
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/server/__init__.py, line 47, in main
  2014-10-01 13:46:10.588 5812 TRACE neutron neutron_api = 
service.serve_wsgi(service.NeutronApiService)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 105, in serve_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron LOG.exception(_('Unrecoverable 
error: please check log '
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/openstack/common/excutils.py, line 
82, in __exit__
  2014-10-01 13:46:10.588 5812 TRACE neutron six.reraise(self.type_, 
self.value, self.tb)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 102, in serve_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron service.start()
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 73, in start
  2014-10-01 13:46:10.588 5812 TRACE neutron self.wsgi_app = 
_run_wsgi(self.app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 168, in _run_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron app = 
config.load_paste_app(app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/common/config.py, line 182, in 
load_paste_app
  2014-10-01 13:46:10.588 5812 TRACE neutron app = 
deploy.loadapp(config:%s % config_path, name=app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 247, in 
loadapp
  2014-10-01 13:46:10.588 5812 TRACE neutron return loadobj(APP, uri, 
name=name, **kw)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 272, in 
loadobj
  2014-10-01 13:46:10.588 5812 TRACE neutron return context.create()
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 710, in create
  2014-10-01 13:46:10.588 5812 TRACE neutron return 
self.object_type.invoke(self)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 144, in invoke
  2014-10-01 13:46:10.588 5812 TRACE neutron **context.local_conf)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/util.py, line 56, in fix_call
  2014-10-01 13:46:10.588 5812 TRACE neutron val = callable(*args, **kw)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/urlmap.py, line 25, in urlmap_factory
  2014-10-01 13:46:10.588 5812 TRACE neutron app = loader.get_app(app_name, 
global_conf=global_conf)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 350, in 
get_app
  2014-10-01 13:46:10.588 5812 TRACE neutron name=name, 
global_conf=global_conf).create()
  2014-10-01 13:46:10.588 5812 TRACE neutron   File

[Yahoo-eng-team] [Bug 1376211] Re: Retry mechanism does not work on startup when used with MySQL

2014-10-03 Thread Doug Hellmann 
** Changed in: oslo.db
Milestone: None = next-kilo

** Also affects: oslo.db/juno
   Importance: Undecided
   Status: New

** Changed in: oslo.db/juno
   Importance: Undecided = High

** Changed in: oslo.db/juno
   Status: New = Confirmed

** Changed in: oslo.db/juno
 Assignee: (unassigned) = Roman Podoliaka (rpodolyaka)

** Changed in: oslo.db/juno
Milestone: None = next-juno

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Title:
  Retry mechanism does not work on startup when used with MySQL

Status in OpenStack Neutron (virtual network service):
  Confirmed
Status in Oslo Database library:
  In Progress
Status in oslo.db juno series:
  Confirmed

Bug description:
  This is initially revealed as Red Hat bug:
  https://bugzilla.redhat.com/show_bug.cgi?id=1144181

  The problem shows up when Neutron or any other oslo.db based projects
  start while MySQL server is not up yet. Instead of retrying connection
  as per max_retries and retry_interval, service just crashes with
  return code 1.

  This is because during engine initialization, engine.execute(SHOW
  VARIABLES LIKE 'sql_mode') is called, which opens the connection,
  *before* _test_connection() succeeds. So the server just bail out to
  sys.exit() at the top of the stack.

  This behaviour was checked for both oslo.db 0.4.0 and 1.0.1.

  I suspect this is a regression from the original db code from oslo-
  incubator though I haven't checked it specifically.

  The easiest way to reproduce the traceback is:

  1. stop MariaDB.
  2. execute the following Python script:

  '''
  import oslo.db.sqlalchemy.session

  url = 'mysql://neutron:123456@10.35.161.235/neutron'
  engine = oslo.db.sqlalchemy.session.EngineFacade(url)
  '''

  The following traceback can be seen in service log:

  2014-10-01 13:46:10.588 5812 TRACE neutron Traceback (most recent call last):
  2014-10-01 13:46:10.588 5812 TRACE neutron   File /usr/bin/neutron-server, 
line 10, in module
  2014-10-01 13:46:10.588 5812 TRACE neutron sys.exit(main())
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/server/__init__.py, line 47, in main
  2014-10-01 13:46:10.588 5812 TRACE neutron neutron_api = 
service.serve_wsgi(service.NeutronApiService)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 105, in serve_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron LOG.exception(_('Unrecoverable 
error: please check log '
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/openstack/common/excutils.py, line 
82, in __exit__
  2014-10-01 13:46:10.588 5812 TRACE neutron six.reraise(self.type_, 
self.value, self.tb)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 102, in serve_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron service.start()
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 73, in start
  2014-10-01 13:46:10.588 5812 TRACE neutron self.wsgi_app = 
_run_wsgi(self.app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 168, in _run_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron app = 
config.load_paste_app(app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/common/config.py, line 182, in 
load_paste_app
  2014-10-01 13:46:10.588 5812 TRACE neutron app = 
deploy.loadapp(config:%s % config_path, name=app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 247, in 
loadapp
  2014-10-01 13:46:10.588 5812 TRACE neutron return loadobj(APP, uri, 
name=name, **kw)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 272, in 
loadobj
  2014-10-01 13:46:10.588 5812 TRACE neutron return context.create()
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 710, in create
  2014-10-01 13:46:10.588 5812 TRACE neutron return 
self.object_type.invoke(self)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 144, in invoke
  2014-10-01 13:46:10.588 5812 TRACE neutron **context.local_conf)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/util.py, line 56, in fix_call
  2014-10-01 13:46:10.588 5812 TRACE neutron val = callable(*args, **kw)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/urlmap.py, line 25, in urlmap_factory
  2014-10-01 13:46:10.588 5812 TRACE neutron app =

[Yahoo-eng-team] [Bug 1376211] Re: Retry mechanism does not work on startup when used with MySQL

2014-10-01 Thread Salvatore Orlando 
This bug affects neutron since after a reboot it might be possible that
the service will fail at startup if it's started before the mysql
service.

** Also affects: neutron
   Importance: Undecided
   Status: New

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You received this bug notification because you are a member of Yahoo!
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https://bugs.launchpad.net/bugs/1376211

Title:
  Retry mechanism does not work on startup when used with MySQL

Status in OpenStack Neutron (virtual network service):
  New
Status in Oslo Database library:
  New

Bug description:
  This is initially revealed as Red Hat bug:
  https://bugzilla.redhat.com/show_bug.cgi?id=1144181

  The problem shows up when Neutron or any other oslo.db based projects
  start while MySQL server is not up yet. Instead of retrying connection
  as per max_retries and retry_interval, service just crashes with
  return code 1.

  This is because during engine initialization, engine.execute(SHOW
  VARIABLES LIKE 'sql_mode') is called, which opens the connection,
  *before* _test_connection() succeeds. So the server just bail out to
  sys.exit() at the top of the stack.

  This behaviour was checked for both oslo.db 0.4.0 and 1.0.1.

  I suspect this is a regression from the original db code from oslo-
  incubator though I haven't checked it specifically.

  The easiest way to reproduce the traceback is:

  1. stop MariaDB.
  2. execute the following Python script:

  '''
  import oslo.db.sqlalchemy.session

  url = 'mysql://neutron:123456@10.35.161.235/neutron'
  engine = oslo.db.sqlalchemy.session.EngineFacade(url)
  '''

  The following traceback can be seen in service log:

  2014-10-01 13:46:10.588 5812 TRACE neutron Traceback (most recent call last):
  2014-10-01 13:46:10.588 5812 TRACE neutron   File /usr/bin/neutron-server, 
line 10, in module
  2014-10-01 13:46:10.588 5812 TRACE neutron sys.exit(main())
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/server/__init__.py, line 47, in main
  2014-10-01 13:46:10.588 5812 TRACE neutron neutron_api = 
service.serve_wsgi(service.NeutronApiService)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 105, in serve_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron LOG.exception(_('Unrecoverable 
error: please check log '
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/openstack/common/excutils.py, line 
82, in __exit__
  2014-10-01 13:46:10.588 5812 TRACE neutron six.reraise(self.type_, 
self.value, self.tb)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 102, in serve_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron service.start()
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 73, in start
  2014-10-01 13:46:10.588 5812 TRACE neutron self.wsgi_app = 
_run_wsgi(self.app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/service.py, line 168, in _run_wsgi
  2014-10-01 13:46:10.588 5812 TRACE neutron app = 
config.load_paste_app(app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/neutron/common/config.py, line 182, in 
load_paste_app
  2014-10-01 13:46:10.588 5812 TRACE neutron app = 
deploy.loadapp(config:%s % config_path, name=app_name)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 247, in 
loadapp
  2014-10-01 13:46:10.588 5812 TRACE neutron return loadobj(APP, uri, 
name=name, **kw)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 272, in 
loadobj
  2014-10-01 13:46:10.588 5812 TRACE neutron return context.create()
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 710, in create
  2014-10-01 13:46:10.588 5812 TRACE neutron return 
self.object_type.invoke(self)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 144, in invoke
  2014-10-01 13:46:10.588 5812 TRACE neutron **context.local_conf)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/util.py, line 56, in fix_call
  2014-10-01 13:46:10.588 5812 TRACE neutron val = callable(*args, **kw)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/urlmap.py, line 25, in urlmap_factory
  2014-10-01 13:46:10.588 5812 TRACE neutron app = loader.get_app(app_name, 
global_conf=global_conf)
  2014-10-01 13:46:10.588 5812 TRACE neutron   File 
/usr/lib/python2.7/site-packages/paste/deploy/loadwsgi.py, line 350, in 
get_app
  2014-10-01 13:46:10.588 5812 TRACE neutron name=name,