** Changed in: neutron
Status: Fix Committed => Fix Released
** Changed in: neutron
Milestone: None => juno-rc1
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https://bugs.launchpad.net/bugs/1357102
Title:
Big Switch: Multiple read calls to consistency DB fails
Status in OpenStack Neutron (virtual network service):
Fix Released
Status in neutron icehouse series:
Fix Released
Bug description:
The Big Switch consistency DB throws an exception if read_for_update() is
called multiple times without closing the transaction in between. This was
originally because there was a DB lock in place and a single thread could
deadlock if it tried twice. However,
there is no longer a point to this protection because the DB lock is gone and
certain response failures result in the DB being read twice (the second time
for a retry).
2014-08-14 21:56:41.496 12939 ERROR neutron.plugins.ml2.managers
[req-ee311173-b38a-481e-8900-d963c676b05f None] Mechanism driver 'bigswitch'
failed in update_port_postcommit
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers Traceback
(most recent call last):
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers File
"/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/managers.py", line 168,
in _call_on_drivers
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers
getattr(driver.obj, method_name)(context)
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers File
"/usr/lib/python2.7/dist-packages/neutron/plugins/ml2/drivers/mech_bigswitch/driver.py",
line 91, in update_port_postcommit
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers
port["network"]["id"], port)
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers File
"/usr/lib/python2.7/dist-packages/neutron/plugins/bigswitch/servermanager.py",
line 555, in rest_update_port
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers
self.rest_create_port(tenant_id, net_id, port)
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers File
"/usr/lib/python2.7/dist-packages/neutron/plugins/bigswitch/servermanager.py",
line 545, in rest_create_port
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers
self.rest_action('PUT', resource, data, errstr)
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers File
"/usr/lib/python2.7/dist-packages/neutron/plugins/bigswitch/servermanager.py",
line 476, in rest_action
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers timeout)
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers File
"/usr/lib/python2.7/dist-packages/neutron/openstack/common/lockutils.py", line
249, in inner
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers return
f(*args, **kwargs)
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers File
"/usr/lib/python2.7/dist-packages/neutron/plugins/bigswitch/servermanager.py",
line 423, in rest_call
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers
hash_handler=hash_handler)
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers File
"/usr/lib/python2.7/dist-packages/neutron/plugins/bigswitch/servermanager.py",
line 139, in rest_call
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers
headers[HASH_MATCH_HEADER] = hash_handler.read_for_update()
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers File
"/usr/lib/python2.7/dist-packages/neutron/plugins/bigswitch/db/consistency_db.py",
line 56, in read_for_update
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers raise
MultipleReadForUpdateCalls()
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers
MultipleReadForUpdateCalls: Only one read_for_update call may be made at a time.
2014-08-14 21:56:41.496 12939 TRACE neutron.plugins.ml2.managers
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