Public bug reported:
During concurent allocation/deallocation/update multiple ips in
ipam_pluggable_backend deadlock can be raised [1]. It causes rollback actions
to be performed in [2], but because of raising deadlock exception database is
not in operatable state unless full transaction restart. So it cause rollback
action to fail and raise another exception 'InternalError'.
As a result original exception DeadLock was replaced with InternalError and
db_retry wrapper does not restart transaction in this case.
Resulting exception as seen in logs[3]:
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
[req-15281429-cfa8-4b9f-a904-0105fc947933 admin -] DBAPIError exception wrapped
from (pymysql.err.InternalError) (1305, u'SAVEPOINT sa_savepoint_3 does not
exist') [SQL: u'ROLLBACK TO SAVEPOINT sa_savepoint_3']
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters Traceback
(most recent call last):
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1139,
in _execute_context
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters context)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/default.py", line
450, in do_execute
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
cursor.execute(statement, parameters)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/cursors.py", line 158, in
execute
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters result =
self._query(query)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/cursors.py", line 308, in _query
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
conn.query(q)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 820, in
query
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
self._affected_rows = self._read_query_result(unbuffered=unbuffered)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 1002, in
_read_query_result
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
result.read()
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 1285, in
read
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
first_packet = self.connection._read_packet()
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 966, in
_read_packet
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
packet.check_error()
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 394, in
check_error
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
err.raise_mysql_exception(self._data)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/err.py", line 120, in
raise_mysql_exception
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
_check_mysql_exception(errinfo)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/err.py", line 115, in
_check_mysql_exception
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters raise
InternalError(errno, errorvalue)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
InternalError: (1305, u'SAVEPOINT sa_savepoint_3 does not exist')
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
2016-04-13 12:15:04.687 18294 DEBUG oslo_messaging._drivers.amqpdriver
[req-56495b4e-29c9-4360-8609-f5b3ded6ed8f - -] sending reply msg_id:
ee2f4dd536fb48e79bee32a668e3cc1d reply queue:
reply_d2a1789c66c141888838b059e322350c time elapsed: 0.006736069s _send_reply
/usr/local/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py:74
/usr/local/lib/python2.7/dist-packages/sqlalchemy/util/langhelpers.py:68:
SAWarning: An exception has occurred during handling of a previous exception.
The previous exception is:
<class 'oslo_db.exception.DBDeadlock'> (pymysql.err.InternalError) (1213,
u'Deadlock found when trying to get lock; try restarting transaction') [SQL:
u'INSERT INTO ipamallocations (ip_address, status, ipam_subnet_id) VALUES
(%(ip_address)s, %(status)s, %(ipam_subnet_id)s)'] [parameters: {'status':
'ALLOCATED', 'ip_address': u'2001:db8::4e', 'ipam_subnet_id':
u'1c084441-cec0-4865-848a-a75f01711e36'}]
"is:\n %s %s\n" % (self._exc_info[0], self._exc_info[1]))
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
[req-15281429-cfa8-4b9f-a904-0105fc947933 admin -] DBAPIError exception wrapped
from (pymysql.err.InternalError) (1305, u'SAVEPOINT sa_savepoint_3 does not
exist') [SQL: u'ROLLBACK TO SAVEPOINT sa_savepoint_3']
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters Traceback
(most recent call last):
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1139,
in _execute_context
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters context)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/default.py", line
450, in do_execute
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
cursor.execute(statement, parameters)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/cursors.py", line 158, in
execute
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters result =
self._query(query)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/cursors.py", line 308, in _query
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
conn.query(q)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 820, in
query
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
self._affected_rows = self._read_query_result(unbuffered=unbuffered)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 1002, in
_read_query_result
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
result.read()
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 1285, in
read
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
first_packet = self.connection._read_packet()
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 966, in
_read_packet
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
packet.check_error()
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 394, in
check_error
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
err.raise_mysql_exception(self._data)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/err.py", line 120, in
raise_mysql_exception
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
_check_mysql_exception(errinfo)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/err.py", line 115, in
_check_mysql_exception
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters raise
InternalError(errno, errorvalue)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
InternalError: (1305, u'SAVEPOINT sa_savepoint_3 does not exist')
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
[1]
https://github.com/openstack/neutron/blob/2a305c563073a3066aac3f07aab3c895ec2cd2fb/neutron/db/ipam_pluggable_backend.py#L59
[2]
https://github.com/openstack/neutron/blob/2a305c563073a3066aac3f07aab3c895ec2cd2fb/neutron/db/ipam_pluggable_backend.py#L69
[3]
http://logs.openstack.org/23/181023/64/check/gate-tempest-dsvm-neutron-dvr/f503538/logs/screen-q-svc.txt.gz#_2016-04-13_12_15_04_685
** Affects: neutron
Importance: Undecided
Assignee: Pavel Bondar (pasha117)
Status: New
** Tags: l3-ipam-dhcp
** Changed in: neutron
Assignee: (unassigned) => Pavel Bondar (pasha117)
** Tags added: l3-ipam-dhcp
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https://bugs.launchpad.net/bugs/1571666
Title:
[Pluggable IPAM] Original exception is replaced on rollback failure
Status in neutron:
New
Bug description:
During concurent allocation/deallocation/update multiple ips in
ipam_pluggable_backend deadlock can be raised [1]. It causes rollback actions
to be performed in [2], but because of raising deadlock exception database is
not in operatable state unless full transaction restart. So it cause rollback
action to fail and raise another exception 'InternalError'.
As a result original exception DeadLock was replaced with InternalError and
db_retry wrapper does not restart transaction in this case.
Resulting exception as seen in logs[3]:
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
[req-15281429-cfa8-4b9f-a904-0105fc947933 admin -] DBAPIError exception wrapped
from (pymysql.err.InternalError) (1305, u'SAVEPOINT sa_savepoint_3 does not
exist') [SQL: u'ROLLBACK TO SAVEPOINT sa_savepoint_3']
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters Traceback
(most recent call last):
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1139,
in _execute_context
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
context)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/default.py", line
450, in do_execute
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
cursor.execute(statement, parameters)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/cursors.py", line 158, in
execute
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters result
= self._query(query)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/cursors.py", line 308, in _query
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
conn.query(q)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 820, in
query
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
self._affected_rows = self._read_query_result(unbuffered=unbuffered)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 1002, in
_read_query_result
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
result.read()
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 1285, in
read
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
first_packet = self.connection._read_packet()
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 966, in
_read_packet
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
packet.check_error()
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 394, in
check_error
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
err.raise_mysql_exception(self._data)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/err.py", line 120, in
raise_mysql_exception
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
_check_mysql_exception(errinfo)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/err.py", line 115, in
_check_mysql_exception
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters raise
InternalError(errno, errorvalue)
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
InternalError: (1305, u'SAVEPOINT sa_savepoint_3 does not exist')
2016-04-13 12:15:04.685 18292 ERROR oslo_db.sqlalchemy.exc_filters
2016-04-13 12:15:04.687 18294 DEBUG oslo_messaging._drivers.amqpdriver
[req-56495b4e-29c9-4360-8609-f5b3ded6ed8f - -] sending reply msg_id:
ee2f4dd536fb48e79bee32a668e3cc1d reply queue:
reply_d2a1789c66c141888838b059e322350c time elapsed: 0.006736069s _send_reply
/usr/local/lib/python2.7/dist-packages/oslo_messaging/_drivers/amqpdriver.py:74
/usr/local/lib/python2.7/dist-packages/sqlalchemy/util/langhelpers.py:68:
SAWarning: An exception has occurred during handling of a previous exception.
The previous exception is:
<class 'oslo_db.exception.DBDeadlock'> (pymysql.err.InternalError) (1213,
u'Deadlock found when trying to get lock; try restarting transaction') [SQL:
u'INSERT INTO ipamallocations (ip_address, status, ipam_subnet_id) VALUES
(%(ip_address)s, %(status)s, %(ipam_subnet_id)s)'] [parameters: {'status':
'ALLOCATED', 'ip_address': u'2001:db8::4e', 'ipam_subnet_id':
u'1c084441-cec0-4865-848a-a75f01711e36'}]
"is:\n %s %s\n" % (self._exc_info[0], self._exc_info[1]))
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
[req-15281429-cfa8-4b9f-a904-0105fc947933 admin -] DBAPIError exception wrapped
from (pymysql.err.InternalError) (1305, u'SAVEPOINT sa_savepoint_3 does not
exist') [SQL: u'ROLLBACK TO SAVEPOINT sa_savepoint_3']
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters Traceback
(most recent call last):
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/base.py", line 1139,
in _execute_context
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
context)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/sqlalchemy/engine/default.py", line
450, in do_execute
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
cursor.execute(statement, parameters)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/cursors.py", line 158, in
execute
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters result
= self._query(query)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/cursors.py", line 308, in _query
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
conn.query(q)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 820, in
query
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
self._affected_rows = self._read_query_result(unbuffered=unbuffered)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 1002, in
_read_query_result
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
result.read()
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 1285, in
read
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
first_packet = self.connection._read_packet()
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 966, in
_read_packet
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
packet.check_error()
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/connections.py", line 394, in
check_error
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
err.raise_mysql_exception(self._data)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/err.py", line 120, in
raise_mysql_exception
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
_check_mysql_exception(errinfo)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters File
"/usr/local/lib/python2.7/dist-packages/pymysql/err.py", line 115, in
_check_mysql_exception
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters raise
InternalError(errno, errorvalue)
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
InternalError: (1305, u'SAVEPOINT sa_savepoint_3 does not exist')
2016-04-13 12:15:04.688 18292 ERROR oslo_db.sqlalchemy.exc_filters
[1]
https://github.com/openstack/neutron/blob/2a305c563073a3066aac3f07aab3c895ec2cd2fb/neutron/db/ipam_pluggable_backend.py#L59
[2]
https://github.com/openstack/neutron/blob/2a305c563073a3066aac3f07aab3c895ec2cd2fb/neutron/db/ipam_pluggable_backend.py#L69
[3]
http://logs.openstack.org/23/181023/64/check/gate-tempest-dsvm-neutron-dvr/f503538/logs/screen-q-svc.txt.gz#_2016-04-13_12_15_04_685
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