| 2014-12-12 17:03:19 |
Jason Hobbs |
description |
I have a MAAS with 100+ nodes in it, and in its maas-django.log I'm seeing these errors from time to time, especially if i try to start many nodes at once:
ERROR 2014-12-12 16:30:25,747 maasserver ################################ Exception: deadlock detected
DETAIL: Process 746 waits for ShareLock on transaction 43344353; blocked by process 742.
Process 742 waits for ExclusiveLock on tuple (5,3) of relation 16585 of database 16385; blocked by process 746.
HINT: See server log for query details.
################################
ERROR 2014-12-12 16:30:25,747 maasserver Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 112, in get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/usr/lib/python2.7/dist-packages/maasserver/api/pxeconfig.py", line 171, in pxeconfig
node.save()
File "/usr/lib/python2.7/dist-packages/maasserver/models/cleansave.py", line 38, in save
return super(CleanSave, self).save(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/maasserver/models/timestampedmodel.py", line 55, in save
return super(TimestampedModel, self).save(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 545, in save
force_update=force_update, update_fields=update_fields)
File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 573, in save_base
updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 635, in _save_table
forced_update)
File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 679, in _do_update
return filtered._update(values) > 0
File "/usr/lib/python2.7/dist-packages/django/db/models/query.py", line 507, in _update
return query.get_compiler(self.db).execute_sql(None)
File "/usr/lib/python2.7/dist-packages/django/db/models/sql/compiler.py", line 975, in execute_sql
cursor = super(SQLUpdateCompiler, self).execute_sql(result_type)
File "/usr/lib/python2.7/dist-packages/django/db/models/sql/compiler.py", line 781, in execute_sql
cursor.execute(sql, params)
File "/usr/lib/python2.7/dist-packages/django/db/backends/util.py", line 53, in execute
return self.cursor.execute(sql, params)
File "/usr/lib/python2.7/dist-packages/django/db/utils.py", line 99, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/usr/lib/python2.7/dist-packages/django/db/backends/util.py", line 53, in execute
return self.cursor.execute(sql, params)
OperationalError: deadlock detected
DETAIL: Process 746 waits for ShareLock on transaction 43344353; blocked by process 742.
Process 742 waits for ExclusiveLock on tuple (5,3) of relation 16585 of database 16385; blocked by process 746.
HINT: See server log for query details. |
I have a MAAS with 100+ nodes in it, and in its maas-django.log I'm seeing these errors from time to time, especially if I try to start many nodes at once.
ERROR 2014-12-12 16:30:25,747 maasserver ################################ Exception: deadlock detected
DETAIL: Process 746 waits for ShareLock on transaction 43344353; blocked by process 742.
Process 742 waits for ExclusiveLock on tuple (5,3) of relation 16585 of database 16385; blocked by process 746.
HINT: See server log for query details.
################################
ERROR 2014-12-12 16:30:25,747 maasserver Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 112, in get_response
response = wrapped_callback(request, *callback_args, **callback_kwargs)
File "/usr/lib/python2.7/dist-packages/maasserver/api/pxeconfig.py", line 171, in pxeconfig
node.save()
File "/usr/lib/python2.7/dist-packages/maasserver/models/cleansave.py", line 38, in save
return super(CleanSave, self).save(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/maasserver/models/timestampedmodel.py", line 55, in save
return super(TimestampedModel, self).save(*args, **kwargs)
File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 545, in save
force_update=force_update, update_fields=update_fields)
File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 573, in save_base
updated = self._save_table(raw, cls, force_insert, force_update, using, update_fields)
File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 635, in _save_table
forced_update)
File "/usr/lib/python2.7/dist-packages/django/db/models/base.py", line 679, in _do_update
return filtered._update(values) > 0
File "/usr/lib/python2.7/dist-packages/django/db/models/query.py", line 507, in _update
return query.get_compiler(self.db).execute_sql(None)
File "/usr/lib/python2.7/dist-packages/django/db/models/sql/compiler.py", line 975, in execute_sql
cursor = super(SQLUpdateCompiler, self).execute_sql(result_type)
File "/usr/lib/python2.7/dist-packages/django/db/models/sql/compiler.py", line 781, in execute_sql
cursor.execute(sql, params)
File "/usr/lib/python2.7/dist-packages/django/db/backends/util.py", line 53, in execute
return self.cursor.execute(sql, params)
File "/usr/lib/python2.7/dist-packages/django/db/utils.py", line 99, in __exit__
six.reraise(dj_exc_type, dj_exc_value, traceback)
File "/usr/lib/python2.7/dist-packages/django/db/backends/util.py", line 53, in execute
return self.cursor.execute(sql, params)
OperationalError: deadlock detected
DETAIL: Process 746 waits for ShareLock on transaction 43344353; blocked by process 742.
Process 742 waits for ExclusiveLock on tuple (5,3) of relation 16585 of database 16385; blocked by process 746.
HINT: See server log for query details. |
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