Details
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Bug
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Status: Closed (View Workflow)
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Critical
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Resolution: Fixed
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0.9.53
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None
Description
I'm having issues using connection pools. I've only managed to get them to work when the C code allocates the connection, either via creation of the pool object (where the connect options allocates all the available pool slots) or by adding connection options via set_config() and then using add_connection() with no arg. If I try to add a connection I've made in the python code it either fails with an error or I get a segfault. So, to be clear, here's what works and what doesn't:
Works (all connections pre-allocated):
pool = mariadb.ConnectionPool( |
pool_name = 'pool1', |
pool_size = 3, |
host = 'localhost', |
user = 'root', |
database = 'test', |
)
|
Works (all connections added via internal connection):
pool = mariadb.ConnectionPool(pool_name = 'pool1') |
pool.set_config(
|
pool_size = 3, |
host = 'localhost', |
user = 'root', |
database = 'test', |
)
|
for j in range(3): |
pool.add_connection()
|
Fails with an error on the first add:
pool = mariadb.ConnectionPool( |
pool_name = 'pool1', |
pool_size = 3, |
)
|
for j in range(3): |
c = mariadb.connect( |
host = 'localhost', |
user = 'root', |
database = 'test', |
)
|
pool.add_connection(c)
|
=> mariadb.PoolError: Couldn't get configuration for pool 'pool1'.
This segfaults on the first add:
pool = mariadb.ConnectionPool(pool_name = 'pool1') |
pool.set_config(pool_size = 3) |
for j in range(3): |
c = mariadb.connect( |
host = 'localhost', |
user = 'root', |
database = 'test', |
)
|
pool.add_connection(c)
|
Here's one more failure:
def get_a_connection(pool): |
conn = None |
while not conn: |
try: |
conn = pool.get_connection() |
break |
except mariadb.PoolError as e: |
pass |
try: |
pool.add_connection()
|
except mariadb.PoolError as e: |
print(f"Pool is full: {e}") |
break |
|
|
return conn |
|
|
pool = mariadb.ConnectionPool(pool_name = 'pool1') |
|
|
pool.set_config(
|
pool_size = 3, |
host = 'localhost', |
user = 'root', |
database = 'test', |
)
|
for j in range(3): |
conn = get_a_connection(pool) |
=> first add_connection() fails with:
=> TypeError: 'sqlstate' is an invalid keyword argument for this function
These tests were done with the latest pip3 install --pre mariadb code using python 3.6.9.
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