Python Node.start方法代码示例

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
    def replace_active_node_test(self):

        debug("Starting cluster with 3 nodes.")
        cluster = self.cluster
        cluster.populate(3).start()
        [node1,node2, node3] = cluster.nodelist()

        debug("Inserting Data...")
        if cluster.version() < "2.1":
            node1.stress(['-o', 'insert', '--num-keys=10000', '--replication-factor=3'])
        else:
            node1.stress(['write', 'n=10000', '-schema', 'replication(factor=3)'])
        cursor = self.patient_cql_connection(node1)
        stress_table = 'keyspace1.standard1' if self.cluster.version() >= '2.1' else '"Keyspace1"."Standard1"'
        query = SimpleStatement('select * from %s LIMIT 1' % stress_table, consistency_level=ConsistencyLevel.THREE)
        initialData = cursor.execute(query)

        #replace active node 3 with node 4
        debug("Starting node 4 to replace active node 3")
        node4 = Node('node4', cluster, True, ('127.0.0.4', 9160), ('127.0.0.4', 7000), '7400', '0', None, ('127.0.0.4',9042))
        cluster.add(node4, False)

        with self.assertRaises(NodeError):
            try:
                node4.start(replace_address='127.0.0.3', wait_for_binary_proto=True)
            except (NodeError, TimeoutError):
                raise NodeError("Node could not start.")

        checkError = node4.grep_log("java.lang.UnsupportedOperationException: Cannot replace a live node...")
        self.assertEqual(len(checkError), 1)

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
    def decommission_node_test(self):
        debug("decommission_node_test()")
        cluster = self.cluster

        cluster.populate(1)
        # create and add a new node, I must not be a seed, otherwise
        # we get schema disagreement issues for awhile after decommissioning it.
        node2 = Node("node2", cluster, True, ("127.0.0.2", 9160), ("127.0.0.2", 7000), "7200", None)
        cluster.add(node2, False)

        [node1, node2] = cluster.nodelist()
        node1.start()
        node2.start()
        wait(2)

        cursor = self.cql_connection(node1).cursor()
        self.prepare_for_changes(cursor)

        node2.decommission()
        wait(30)

        self.validate_schema_consistent(node1)
        self.make_schema_changes(cursor, namespace="ns1")

        # create and add a new node
        node3 = Node("node3", cluster, True, ("127.0.0.3", 9160), ("127.0.0.3", 7000), "7300", None)

        cluster.add(node3, True)
        node3.start()

        wait(30)
        self.validate_schema_consistent(node1)

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
    def test_upgrade_legacy_table(self):
        """
        Upgrade with bringing up the legacy tables after the newer nodes (without legacy tables)
        were started.

        @jira_ticket CASSANDRA-12813
        """

        cluster = self.cluster

        # Forcing cluster version on purpose
        cluster.set_install_dir(version="2.1.16")
        cluster.populate(3).start()

        node1, node2, node3 = cluster.nodelist()

        # Wait for default user to get created on one of the nodes
        time.sleep(15)

        # Upgrade to current version
        for node in [node1, node2, node3]:
            node.drain()
            node.watch_log_for("DRAINED")
            node.stop(gently=True)
            self.set_node_to_current_version(node)

        cluster.start()

        # Make sure the system_auth table will get replicated to the node that we're going to replace
        session = self.patient_cql_connection(node1, user='cassandra', password='cassandra')
        session.execute("ALTER KEYSPACE system_auth WITH REPLICATION = { 'class' : 'SimpleStrategy', 'replication_factor' : 3 };")
        cluster.repair()

        cluster.stop()

        # Replace the node
        cluster.seeds.remove(node1)
        cluster.remove(node1)

        replacement_address = node1.address()
        replacement_node = Node('replacement', cluster=self.cluster, auto_bootstrap=True,
                                thrift_interface=(replacement_address, 9160), storage_interface=(replacement_address, 7000),
                                jmx_port='7400', remote_debug_port='0', initial_token=None, binary_interface=(replacement_address, 9042))
        self.set_node_to_current_version(replacement_node)

        cluster.add(replacement_node, True)
        replacement_node.start(wait_for_binary_proto=True)

        node2.start(wait_for_binary_proto=True)
        node3.start(wait_for_binary_proto=True)

        replacement_node.watch_log_for('Initializing system_auth.credentials')
        replacement_node.watch_log_for('Initializing system_auth.permissions')
        replacement_node.watch_log_for('Initializing system_auth.users')

        cluster.repair()
        replacement_node.watch_log_for('Repair command')

        # Should succeed. Will throw an NPE on pre-12813 code.
        self.patient_cql_connection(replacement_node, user='cassandra', password='cassandra')

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
 def _init_new_loading_node(self, ks_name, create_stmt, use_thrift=False):
     loading_node = Node(
         name='node2',
         cluster=self.cluster,
         auto_bootstrap=False,
         thrift_interface=('127.0.0.2', 9160) if use_thrift else None,
         storage_interface=('127.0.0.2', 7000),
         jmx_port='7400',
         remote_debug_port='0',
         initial_token=None,
         binary_interface=('127.0.0.2', 9042)
     )
     logger.debug('adding node')
     self.cluster.add(loading_node, is_seed=True)
     logger.debug('starting new node')
     loading_node.start(wait_for_binary_proto=True)
     logger.debug('recreating ks and table')
     loading_session = self.patient_exclusive_cql_connection(loading_node)
     create_ks(loading_session, ks_name, rf=1)
     logger.debug('creating new table')
     loading_session.execute(create_stmt)
     logger.debug('stopping new node')
     loading_session.cluster.shutdown()
     loading_node.stop()
     return loading_node

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
    def replace_nonexistent_node_test(self):
        debug("Starting cluster with 3 nodes.")
        cluster = self.cluster
        cluster.populate(3).start()
        [node1,node2, node3] = cluster.nodelist()

        debug("Inserting Data...")
        if cluster.version() < "2.1":
            node1.stress(['-o', 'insert', '--num-keys=10000', '--replication-factor=3'])
        else:
            node1.stress(['write', 'n=10000', '-schema', 'replication(factor=3)'])
        cursor = self.patient_cql_connection(node1)
        stress_table = 'keyspace1.standard1' if self.cluster.version() >= '2.1' else '"Keyspace1"."Standard1"'
        query = SimpleStatement('select * from %s LIMIT 1' % stress_table, consistency_level=ConsistencyLevel.THREE)
        initialData = cursor.execute(query)

        debug('Start node 4 and replace an address with no node')
        node4 = Node('node4', cluster, True, ('127.0.0.4', 9160), ('127.0.0.4', 7000), '7400', '0', None, ('127.0.0.4',9042))
        cluster.add(node4, False)

        #try to replace an unassigned ip address
        with self.assertRaises(NodeError):
            try:
                node4.start(replace_address='127.0.0.5', wait_for_binary_proto=True)
            except (NodeError, TimeoutError):
                raise NodeError("Node could not start.")

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
    def replace_with_reset_resume_state_test(self):
        """Test replace with resetting bootstrap progress"""

        cluster = self.cluster
        cluster.populate(3).start()
        node1, node2, node3 = cluster.nodelist()

        node1.stress(['write', 'n=100K', 'no-warmup', '-schema', 'replication(factor=3)'])

        session = self.patient_cql_connection(node1)
        stress_table = 'keyspace1.standard1'
        query = SimpleStatement('select * from %s LIMIT 1' % stress_table, consistency_level=ConsistencyLevel.THREE)
        initial_data = rows_to_list(session.execute(query))

        node3.stop(gently=False)

        # kill node1 in the middle of streaming to let it fail
        t = InterruptBootstrap(node1)
        t.start()
        # replace node 3 with node 4
        debug("Starting node 4 to replace node 3")
        node4 = Node('node4', cluster=cluster, auto_bootstrap=True, thrift_interface=('127.0.0.4', 9160),
                     storage_interface=('127.0.0.4', 7000), jmx_port='7400', remote_debug_port='0',
                     initial_token=None, binary_interface=('127.0.0.4', 9042))

        # keep timeout low so that test won't hang
        node4.set_configuration_options(values={'streaming_socket_timeout_in_ms': 1000})
        cluster.add(node4, False)
        try:
            node4.start(jvm_args=["-Dcassandra.replace_address_first_boot=127.0.0.3"], wait_other_notice=False)
        except NodeError:
            pass  # node doesn't start as expected
        t.join()
        node1.start()

        # restart node4 bootstrap with resetting bootstrap state
        node4.stop()
        mark = node4.mark_log()
        node4.start(jvm_args=[
                    "-Dcassandra.replace_address_first_boot=127.0.0.3",
                    "-Dcassandra.reset_bootstrap_progress=true"
                    ])
        # check if we reset bootstrap state
        node4.watch_log_for("Resetting bootstrap progress to start fresh", from_mark=mark)
        # wait for node3 ready to query
        node4.watch_log_for("Listening for thrift clients...", from_mark=mark)

        # check if 2nd bootstrap succeeded
        assert_bootstrap_state(self, node4, 'COMPLETED')

        # query should work again
        debug("Stopping old nodes")
        node1.stop(gently=False, wait_other_notice=True)
        node2.stop(gently=False, wait_other_notice=True)

        debug("Verifying data on new node.")
        session = self.patient_exclusive_cql_connection(node4)
        assert_all(session, 'SELECT * from {} LIMIT 1'.format(stress_table),
                   expected=initial_data,
                   cl=ConsistencyLevel.ONE)

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
    def _test_disk_balance_replace(self, same_address):
        logger.debug("Creating cluster")
        cluster = self.cluster
        if self.dtest_config.use_vnodes:
            cluster.set_configuration_options(values={'num_tokens': 256})
        # apparently we have legitimate errors in the log when bootstrapping (see bootstrap_test.py)
        self.fixture_dtest_setup.allow_log_errors = True
        cluster.populate(4).start(wait_for_binary_proto=True)
        node1 = cluster.nodes['node1']

        logger.debug("Populating")
        node1.stress(['write', 'n=50k', 'no-warmup', '-rate', 'threads=100', '-schema', 'replication(factor=3)', 'compaction(strategy=SizeTieredCompactionStrategy,enabled=false)'])
        cluster.flush()

        logger.debug("Stopping and removing node2")
        node2 = cluster.nodes['node2']
        node2.stop(gently=False)
        self.cluster.remove(node2)

        node5_address = node2.address() if same_address else '127.0.0.5'
        logger.debug("Starting replacement node")
        node5 = Node('node5', cluster=self.cluster, auto_bootstrap=True,
                     thrift_interface=None, storage_interface=(node5_address, 7000),
                     jmx_port='7500', remote_debug_port='0', initial_token=None,
                     binary_interface=(node5_address, 9042))
        self.cluster.add(node5, False)
        node5.start(jvm_args=["-Dcassandra.replace_address_first_boot={}".format(node2.address())],
                    wait_for_binary_proto=True,
                    wait_other_notice=True)

        logger.debug("Checking replacement node is balanced")
        self.assert_balanced(node5)

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
    def resumable_replace_test(self):
        """
        Test resumable bootstrap while replacing node. Feature introduced in
        2.2 with ticket https://issues.apache.org/jira/browse/CASSANDRA-8838

        @jira_ticket https://issues.apache.org/jira/browse/CASSANDRA-8838
        """

        cluster = self.cluster
        cluster.populate(3).start()
        node1, node2, node3 = cluster.nodelist()

        node1.stress(['write', 'n=100K', 'no-warmup', '-schema', 'replication(factor=3)'])

        session = self.patient_cql_connection(node1)
        stress_table = 'keyspace1.standard1'
        query = SimpleStatement('select * from %s LIMIT 1' % stress_table, consistency_level=ConsistencyLevel.THREE)
        initial_data = rows_to_list(session.execute(query))

        node3.stop(gently=False)

        # kill node1 in the middle of streaming to let it fail
        t = InterruptBootstrap(node1)
        t.start()
        # replace node 3 with node 4
        debug("Starting node 4 to replace node 3")
        node4 = Node('node4', cluster=cluster, auto_bootstrap=True, thrift_interface=('127.0.0.4', 9160),
                     storage_interface=('127.0.0.4', 7000), jmx_port='7400', remote_debug_port='0',
                     initial_token=None, binary_interface=('127.0.0.4', 9042))
        # keep timeout low so that test won't hang
        node4.set_configuration_options(values={'streaming_socket_timeout_in_ms': 1000})
        cluster.add(node4, False)
        try:
            node4.start(jvm_args=["-Dcassandra.replace_address_first_boot=127.0.0.3"], wait_other_notice=False)
        except NodeError:
            pass  # node doesn't start as expected
        t.join()

        # bring back node1 and invoke nodetool bootstrap to resume bootstrapping
        node1.start()
        node4.nodetool('bootstrap resume')
        # check if we skipped already retrieved ranges
        node4.watch_log_for("already available. Skipping streaming.")
        # wait for node3 ready to query
        node4.watch_log_for("Listening for thrift clients...")

        # check if 2nd bootstrap succeeded
        assert_bootstrap_state(self, node4, 'COMPLETED')

        # query should work again
        debug("Stopping old nodes")
        node1.stop(gently=False, wait_other_notice=True)
        node2.stop(gently=False, wait_other_notice=True)

        debug("Verifying data on new node.")
        session = self.patient_exclusive_cql_connection(node4)
        assert_all(session, 'SELECT * from {} LIMIT 1'.format(stress_table),
                   expected=initial_data,
                   cl=ConsistencyLevel.ONE)

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
    def multiple_repair_test(self):
        cluster = self.cluster
        cluster.populate(3).start()
        node1, node2, node3 = cluster.nodelist()

        session = self.patient_cql_connection(node1)
        self.create_ks(session, 'ks', 3)
        self.create_cf(session, 'cf', read_repair=0.0, columns={'c1': 'text', 'c2': 'text'})

        debug("insert data")

        insert_c1c2(session, keys=range(1, 50), consistency=ConsistencyLevel.ALL)
        node1.flush()

        debug("bringing down node 3")
        node3.flush()
        node3.stop(gently=False)

        debug("inserting additional data into node 1 and 2")
        insert_c1c2(session, keys=range(50, 100), consistency=ConsistencyLevel.TWO)
        node1.flush()
        node2.flush()

        debug("restarting and repairing node 3")
        node3.start(wait_for_binary_proto=True)

        if cluster.version() >= "2.2":
            node3.repair()
        else:
            node3.nodetool("repair -par -inc")

        # wait stream handlers to be closed on windows
        # after session is finished (See CASSANDRA-10644)
        if is_win:
            time.sleep(2)

        debug("stopping node 2")
        node2.stop(gently=False)

        debug("inserting data in nodes 1 and 3")
        insert_c1c2(session, keys=range(100, 150), consistency=ConsistencyLevel.TWO)
        node1.flush()
        node3.flush()

        debug("start and repair node 2")
        node2.start(wait_for_binary_proto=True)

        if cluster.version() >= "2.2":
            node2.repair()
        else:
            node2.nodetool("repair -par -inc")

        debug("replace node and check data integrity")
        node3.stop(gently=False)
        node5 = Node('node5', cluster, True, ('127.0.0.5', 9160), ('127.0.0.5', 7000), '7500', '0', None, ('127.0.0.5', 9042))
        cluster.add(node5, False)
        node5.start(replace_address='127.0.0.3', wait_other_notice=True)

        assert_one(session, "SELECT COUNT(*) FROM ks.cf LIMIT 200", [149])

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
    def multiple_repair_test(self):
        cluster = self.cluster
        cluster.populate(3).start()
        [node1, node2, node3] = cluster.nodelist()

        cursor = self.patient_cql_connection(node1)
        self.create_ks(cursor, 'ks', 3)
        self.create_cf(cursor, 'cf', read_repair=0.0, columns={'c1': 'text', 'c2': 'text'})

        debug("insert data")

        for x in range(1, 50):
            insert_c1c2(cursor, x, ConsistencyLevel.ALL)
        node1.flush()

        debug("bringing down node 3")
        node3.flush()
        node3.stop(gently=False)

        debug("inserting additional data into node 1 and 2")
        for y in range(50, 100):
            insert_c1c2(cursor, y, ConsistencyLevel.TWO)
        node1.flush()
        node2.flush()

        debug("restarting and repairing node 3")
        node3.start()

        if cluster.version() >= "3.0":
            node3.repair()
        else:
            node3.nodetool("repair -par -inc")

        debug("stopping node 2")
        node2.stop(gently=False)

        debug("inserting data in nodes 1 and 3")
        for z in range(100, 150):
            insert_c1c2(cursor, z, ConsistencyLevel.TWO)
        node1.flush()
        node3.flush()

        debug("start and repair node 2")
        node2.start()

        if cluster.version() >= "3.0":
            node2.repair()
        else:
            node2.nodetool("repair -par -inc")

        debug("replace node and check data integrity")
        node3.stop(gently=False)
        node5 = Node('node5', cluster, True, ('127.0.0.5', 9160), ('127.0.0.5', 7000), '7500', '0', None, ('127.0.0.5',9042))
        cluster.add(node5, False)
        node5.start(replace_address = '127.0.0.3', wait_other_notice=True)

        assert_one(cursor, "SELECT COUNT(*) FROM ks.cf LIMIT 200", [149])

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
    def resumable_replace_test(self):
        """
        Test resumable bootstrap while replacing node. Feature introduced in
        2.2 with ticket https://issues.apache.org/jira/browse/CASSANDRA-8838

        @jira_ticket https://issues.apache.org/jira/browse/CASSANDRA-8838
        """

        cluster = self.cluster
        cluster.populate(3).start()
        node1, node2, node3 = cluster.nodelist()

        node1.stress(['write', 'n=100K', '-schema', 'replication(factor=3)'])

        session = self.patient_cql_connection(node1)
        stress_table = 'keyspace1.standard1'
        query = SimpleStatement('select * from %s LIMIT 1' % stress_table, consistency_level=ConsistencyLevel.THREE)
        initialData = list(session.execute(query))

        node3.stop(gently=False)

        # kill node1 in the middle of streaming to let it fail
        t = InterruptBootstrap(node1)
        t.start()
        # replace node 3 with node 4
        debug("Starting node 4 to replace node 3")
        node4 = Node('node4', cluster, True, ('127.0.0.4', 9160), ('127.0.0.4', 7000), '7400', '0', None, binary_interface=('127.0.0.4', 9042))
        # keep timeout low so that test won't hang
        node4.set_configuration_options(values={'streaming_socket_timeout_in_ms': 1000})
        cluster.add(node4, False)
        try:
            node4.start(jvm_args=["-Dcassandra.replace_address_first_boot=127.0.0.3"], wait_other_notice=False)
        except NodeError:
            pass  # node doesn't start as expected
        t.join()

        # bring back node1 and invoke nodetool bootstrap to resume bootstrapping
        node1.start()
        node4.nodetool('bootstrap resume')
        # check if we skipped already retrieved ranges
        node4.watch_log_for("already available. Skipping streaming.")
        # wait for node3 ready to query
        node4.watch_log_for("Listening for thrift clients...")

        # check if 2nd bootstrap succeeded
        session = self.exclusive_cql_connection(node4)
        rows = list(session.execute("SELECT bootstrapped FROM system.local WHERE key='local'"))
        assert len(rows) == 1
        assert rows[0][0] == 'COMPLETED', rows[0][0]

        # query should work again
        debug("Verifying querying works again.")
        finalData = list(session.execute(query))
        self.assertListEqual(initialData, finalData)

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
    def replace_with_reset_resume_state_test(self):
        """Test replace with resetting bootstrap progress"""

        cluster = self.cluster
        cluster.populate(3).start()
        node1, node2, node3 = cluster.nodelist()

        node1.stress(['write', 'n=100000', '-schema', 'replication(factor=3)'])

        session = self.patient_cql_connection(node1)
        stress_table = 'keyspace1.standard1'
        query = SimpleStatement('select * from %s LIMIT 1' % stress_table, consistency_level=ConsistencyLevel.THREE)
        initialData = list(session.execute(query))

        node3.stop(gently=False)

        # kill node1 in the middle of streaming to let it fail
        t = InterruptBootstrap(node1)
        t.start()
        # replace node 3 with node 4
        debug("Starting node 4 to replace node 3")
        node4 = Node('node4', cluster, True, ('127.0.0.4', 9160), ('127.0.0.4', 7000), '7400', '0', None, binary_interface=('127.0.0.4', 9042))
        # keep timeout low so that test won't hang
        node4.set_configuration_options(values={'streaming_socket_timeout_in_ms': 1000})
        cluster.add(node4, False)
        try:
            node4.start(jvm_args=["-Dcassandra.replace_address_first_boot=127.0.0.3"], wait_other_notice=False)
        except NodeError:
            pass  # node doesn't start as expected
        t.join()
        node1.start()

        # restart node4 bootstrap with resetting bootstrap state
        node4.stop()
        mark = node4.mark_log()
        node4.start(jvm_args=[
                    "-Dcassandra.replace_address_first_boot=127.0.0.3",
                    "-Dcassandra.reset_bootstrap_progress=true"
                    ])
        # check if we reset bootstrap state
        node4.watch_log_for("Resetting bootstrap progress to start fresh", from_mark=mark)
        # wait for node3 ready to query
        node4.watch_log_for("Listening for thrift clients...", from_mark=mark)

        # check if 2nd bootstrap succeeded
        session = self.exclusive_cql_connection(node4)
        rows = list(session.execute("SELECT bootstrapped FROM system.local WHERE key='local'"))
        assert len(rows) == 1
        assert rows[0][0] == 'COMPLETED', rows[0][0]

        # query should work again
        debug("Verifying querying works again.")
        finalData = list(session.execute(query))
        self.assertListEqual(initialData, finalData)

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
    def issue_150_test(self):
        self.cluster = Cluster(CLUSTER_PATH, "150", cassandra_version='2.0.9')
        self.cluster.populate([1, 2], use_vnodes=True)
        self.cluster.start()
        dcs = [node.data_center for node in self.cluster.nodelist()]
        dcs.append('dc2')

        node4 = Node('node4', self.cluster, True, ('127.0.0.4', 9160), ('127.0.0.4', 7000),
            '7400', '2000', None)
        self.cluster.add(node4, False, 'dc2')
        node4.start()

        dcs_2 = [node.data_center for node in self.cluster.nodelist()]
        self.assertItemsEqual(dcs, dcs_2)
        node4.nodetool('status')

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
    def replace_nonexistent_node_test(self):
        debug("Starting cluster with 3 nodes.")
        cluster = self.cluster
        cluster.populate(3).start()
        node1, node2, node3 = cluster.nodelist()

        debug('Start node 4 and replace an address with no node')
        node4 = Node('node4', cluster, True, ('127.0.0.4', 9160), ('127.0.0.4', 7000), '7400', '0', None, binary_interface=('127.0.0.4', 9042))
        cluster.add(node4, False)

        # try to replace an unassigned ip address
        mark = node4.mark_log()
        node4.start(replace_address='127.0.0.5', wait_other_notice=False)
        node4.watch_log_for("java.lang.RuntimeException: Cannot replace_address /127.0.0.5 because it doesn't exist in gossip", from_mark=mark)
        self.check_not_running(node4)

# 需要导入模块: from ccmlib.node import Node [as 别名]
# 或者: from ccmlib.node.Node import start [as 别名]
    def test_decommission_node(self):
        logger.debug("decommission_node_test()")
        cluster = self.cluster

        cluster.populate(1)
        # create and add a new node, I must not be a seed, otherwise
        # we get schema disagreement issues for awhile after decommissioning it.
        node2 = Node('node2',
                     cluster,
                     True,
                     ('127.0.0.2', 9160),
                     ('127.0.0.2', 7000),
                     '7200',
                     '0',
                     None,
                     binary_interface=('127.0.0.2', 9042))
        cluster.add(node2, False)

        node1, node2 = cluster.nodelist()
        node1.start(wait_for_binary_proto=True)
        node2.start(wait_for_binary_proto=True)
        wait(2)

        session = self.patient_cql_connection(node1)
        self.prepare_for_changes(session)

        node2.decommission()
        wait(30)

        self.validate_schema_consistent(node1)
        self.make_schema_changes(session, namespace='ns1')

        # create and add a new node
        node3 = Node('node3',
                     cluster,
                     True,
                     ('127.0.0.3', 9160),
                     ('127.0.0.3', 7000),
                     '7300',
                     '0',
                     None,
                     binary_interface=('127.0.0.3', 9042))

        cluster.add(node3, True)
        node3.start(wait_for_binary_proto=True)

        wait(30)
        self.validate_schema_consistent(node1)