84 lines
2.7 KiB
Python
84 lines
2.7 KiB
Python
# Copyright 2013-2017 DataStax, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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try:
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import unittest2 as unittest
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except ImportError:
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import unittest
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import os
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from cassandra.cluster import Cluster
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from tests.integration import use_singledc, PROTOCOL_VERSION
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def setup_module():
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use_singledc()
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class StressInsertsTests(unittest.TestCase):
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"""
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Test case for PYTHON-124: Repeated inserts may exhaust all connections
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causing NoConnectionsAvailable, in_flight never decreased
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"""
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def setUp(self):
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"""
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USE test1rf;
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DROP TABLE IF EXISTS race;
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CREATE TABLE race (x int PRIMARY KEY);
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"""
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self.cluster = Cluster(protocol_version=PROTOCOL_VERSION)
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self.session = self.cluster.connect('test1rf')
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ddl1 = '''
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DROP TABLE IF EXISTS race'''
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self.session.execute(ddl1)
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ddl2 = '''
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CREATE TABLE race (x int PRIMARY KEY)'''
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self.session.execute(ddl2)
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def tearDown(self):
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"""
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DROP TABLE test1rf.race
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Shutdown cluster
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"""
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self.session.execute("DROP TABLE race")
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self.cluster.shutdown()
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def test_in_flight_is_one(self):
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"""
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Verify that in_flight value stays equal to one while doing multiple inserts.
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The number of inserts can be set through INSERTS_ITERATIONS environmental variable.
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Default value is 1000000.
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"""
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prepared = self.session.prepare("INSERT INTO race (x) VALUES (?)")
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iterations = int(os.getenv("INSERT_ITERATIONS", 1000000))
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i = 0
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leaking_connections = False
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while i < iterations and not leaking_connections:
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bound = prepared.bind((i,))
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self.session.execute(bound)
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for pool in self.session._pools.values():
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if leaking_connections:
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break
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for conn in pool.get_connections():
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if conn.in_flight > 1:
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print(self.session.get_pool_state())
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leaking_connections = True
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break
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i = i + 1
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self.assertFalse(leaking_connections, 'Detected leaking connection after %s iterations' % i)
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