this is the test before the change, for reference:
def test_can_register_udt_before_connecting(self):
"""
Test the registration of UDTs before session creation
"""
c = TestCluster()
s = c.connect(wait_for_all_pools=True)
s.execute("""
CREATE KEYSPACE udt_test_register_before_connecting
WITH replication = { 'class' : 'SimpleStrategy', 'replication_factor': '1' }
""")
s.set_keyspace("udt_test_register_before_connecting")
s.execute("CREATE TYPE user (age int, name text)")
s.execute("CREATE TABLE mytable (a int PRIMARY KEY, b frozen<user>)")
s.execute("""
CREATE KEYSPACE udt_test_register_before_connecting2
WITH replication = { 'class' : 'SimpleStrategy', 'replication_factor': '1' }
""")
s.set_keyspace("udt_test_register_before_connecting2")
s.execute("CREATE TYPE user (state text, is_cool boolean)")
s.execute("CREATE TABLE mytable (a int PRIMARY KEY, b frozen<user>)")
# now that types are defined, shutdown and re-create Cluster
c.shutdown()
c = TestCluster()
User1 = namedtuple('user', ('age', 'name'))
User2 = namedtuple('user', ('state', 'is_cool'))
c.register_user_type("udt_test_register_before_connecting", "user", User1)
c.register_user_type("udt_test_register_before_connecting2", "user", User2)
s = c.connect(wait_for_all_pools=True)
s.set_keyspace("udt_test_register_before_connecting")
s.execute("INSERT INTO mytable (a, b) VALUES (%s, %s)", (0, User1(42, 'bob')))
result = s.execute("SELECT b FROM mytable WHERE a=0")
row = result[0]
self.assertEqual(42, row.b.age)
self.assertEqual('bob', row.b.name)
self.assertTrue(type(row.b) is User1)
# use the same UDT name in a different keyspace
s.set_keyspace("udt_test_register_before_connecting2")
s.execute("INSERT INTO mytable (a, b) VALUES (%s, %s)", (0, User2('Texas', True)))
result = s.execute("SELECT b FROM mytable WHERE a=0")
row = result[0]
self.assertEqual('Texas', row.b.state)
self.assertEqual(True, row.b.is_cool)
self.assertTrue(type(row.b) is User2)
s.execute("DROP KEYSPACE udt_test_register_before_connecting")
s.execute("DROP KEYSPACE udt_test_register_before_connecting2")
the hypophysis I have, is that some connection (of some shard) might have been missed, and didn't got the USE command,
we don't have a mechanism to validate all connect got it, and that the next query can't be executed before they did
test_can_register_udt_before_connecting
was flaky for a long timewe've pinpoint it to be the usage of
set_keyspace
and in https://github.com/scylladb/python-driver/pull/299 we stop usingset_keyspace
this is the test before the change, for reference:
the hypophysis I have, is that some connection (of some shard) might have been missed, and didn't got the
USE
command, we don't have a mechanism to validate all connect got it, and that the next query can't be executed before they did