Hi all,
I hit a problem when using sqlalchemy operates mysql.
Engine.execute hangs about 5 mins... and then, get error:
'MySQL server has gone away' or 'Lost connection to MySQL server during
query'.
Actually, when operation hangs, I login mysql server is OK.
Why this happened?
Or how to
Hi all,
Does anyone know hoe to interpret the following error?
AssertionError: A conflicting state is already present in the identity
map for key (class 'models.data.database.Keuze', (1,))
Cheers, Lars
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Yeah I confirmed set collections don't actually fix it, I guess setting a
rollback point is required.
Is there any chance this is a difference between the way mysql does table
locking and postgres?
The collections in question have lazy=dynamic set so I'm wondering if
previously it wasn't a
it means this:
a1 = A(id=1)
session.add(a1)
session.commit()
a2 = A(id=1)
session.add(a2) # -- error
On Mar 18, 2014, at 9:59 AM, lars van gemerden l...@rational-it.com wrote:
Hi all,
Does anyone know hoe to interpret the following error?
AssertionError: A conflicting state is
On Mar 18, 2014, at 11:30 AM, Morgan McClure mcclure.mor...@gmail.com wrote:
Yeah I confirmed set collections don't actually fix it, I guess setting a
rollback point is required.
Is there any chance this is a difference between the way mysql does table
locking and postgres?
The
Your connection to the database has been idle for too long and MySQL has
disconnected it. You can mitigate it by having fake traffic that will use the
connection. Increasing the timeout of MySQL. Set SQLAlchemy to recycle
connections in the connection pool more aggressively (and make sure
I tried all you said. Here is my code:
engine = create_engine(db_url,
pool_size=100,max_overflow=150,echo=engine_echo,pool_recycle=3600)
And, in the beginning, I googled a lot and add this:
def _ping_db():
#session.execute('show variables')
try:
session.execute('select 1')
