Public bug reported:
When we working with transaction we should use context manager as if exception
appears transaction can hang.
The code like:
context.session.begin(subtransactions=True)
...
try:
context.session.add(binding)
context.session.commit()
except db_exc.DBDuplicateEntry:
context.session.rollback()
is not safe becuase if another exception, not DBDuplicateEntry will be
raised, transaction will hang.
** Affects: neutron
Importance: Low
Assignee: Ann Kamyshnikova (akamyshnikova)
Status: New
** Tags: db
** Changed in: neutron
Importance: Undecided => Low
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https://bugs.launchpad.net/bugs/1557546
Title:
Correct usage of context manager for transactions
Status in neutron:
New
Bug description:
When we working with transaction we should use context manager as if
exception appears transaction can hang.
The code like:
context.session.begin(subtransactions=True)
...
try:
context.session.add(binding)
context.session.commit()
except db_exc.DBDuplicateEntry:
context.session.rollback()
is not safe becuase if another exception, not DBDuplicateEntry will be
raised, transaction will hang.
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https://bugs.launchpad.net/neutron/+bug/1557546/+subscriptions
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