Fix

src/Storages/RabbitMQ/StorageRabbitMQ.cpp

@@ -645,7 +645,10 @@ Pipe StorageRabbitMQ::read(
     }
 
     if (!connection->getHandler().loopRunning() && connection->isConnected())
+    {
+        connection->getHandler().updateLoopState(Loop::RUN);
         looping_task->activateAndSchedule();
+    }
 
     LOG_DEBUG(log, "Starting reading {} streams", pipes.size());
     auto united_pipe = Pipe::unitePipes(std::move(pipes));

tests/integration/test_storage_rabbitmq/test.py

@@ -2042,6 +2042,148 @@ def test_rabbitmq_bad_args(rabbitmq_cluster):
     ''')
 
 
+def test_rabbitmq_issue_30691(rabbitmq_cluster):
+    instance.query('''
+        CREATE TABLE test.rabbitmq_drop (json String)
+            ENGINE = RabbitMQ
+            SETTINGS rabbitmq_host_port = 'rabbitmq1:5672',
+                     rabbitmq_exchange_name = '30691',
+                     rabbitmq_row_delimiter = '\\n', -- Works only if adding this setting
+                     rabbitmq_format = 'LineAsString',
+                     rabbitmq_queue_base = '30691';
+        ''')
+
+    credentials = pika.PlainCredentials('root', 'clickhouse')
+    parameters = pika.ConnectionParameters(rabbitmq_cluster.rabbitmq_ip, rabbitmq_cluster.rabbitmq_port, '/', credentials)
+    connection = pika.BlockingConnection(parameters)
+    channel = connection.channel()
+
+    channel.basic_publish(exchange='30691', routing_key='', body=json.dumps({"event_type": "purge", "as_src": 1234, "as_dst": 0, "as_path": "",
+                                                                            "local_pref": 100, "med": 0, "peer_as_dst": 0,
+                                                                            "ip_src": "<redacted ipv6>", "ip_dst": "<redacted ipv6>",
+                                                                            "port_src": 443, "port_dst": 41930, "ip_proto": "tcp",
+                                                                            "tos": 0, "stamp_inserted": "2021-10-26 15:20:00",
+                                                                            "stamp_updated": "2021-10-26 15:23:14", "packets": 2, "bytes": 1216, "writer_id": "default_amqp/449206"}))
+    result = ''
+    while True:
+        result = instance.query('SELECT * FROM test.rabbitmq_drop', ignore_error=True)
+        print(result)
+        if result != "":
+            break
+    assert(result.strip() =="""{"event_type": "purge", "as_src": 1234, "as_dst": 0, "as_path": "", "local_pref": 100, "med": 0, "peer_as_dst": 0, "ip_src": "<redacted ipv6>", "ip_dst": "<redacted ipv6>", "port_src": 443, "port_dst": 41930, "ip_proto": "tcp", "tos": 0, "stamp_inserted": "2021-10-26 15:20:00", "stamp_updated": "2021-10-26 15:23:14", "packets": 2, "bytes": 1216, "writer_id": "default_amqp/449206"}""")
+
+
+def test_rabbitmq_drop_mv(rabbitmq_cluster):
+    instance.query('''
+        CREATE TABLE test.rabbitmq (key UInt64, value UInt64)
+            ENGINE = RabbitMQ
+            SETTINGS rabbitmq_host_port = 'rabbitmq1:5672',
+                     rabbitmq_exchange_name = 'mv',
+                     rabbitmq_format = 'JSONEachRow',
+                     rabbitmq_queue_base = 'drop_mv';
+        CREATE TABLE test.view (key UInt64, value UInt64)
+            ENGINE = MergeTree()
+            ORDER BY key;
+        CREATE MATERIALIZED VIEW test.consumer TO test.view AS
+            SELECT * FROM test.rabbitmq;
+    ''')
+
+    credentials = pika.PlainCredentials('root', 'clickhouse')
+    parameters = pika.ConnectionParameters(rabbitmq_cluster.rabbitmq_ip, rabbitmq_cluster.rabbitmq_port, '/', credentials)
+    connection = pika.BlockingConnection(parameters)
+    channel = connection.channel()
+
+    messages = []
+    for i in range(20):
+        channel.basic_publish(exchange='mv', routing_key='', body=json.dumps({'key': i, 'value': i}))
+
+    instance.query('DROP VIEW test.consumer')
+    for i in range(20, 40):
+        channel.basic_publish(exchange='mv', routing_key='', body=json.dumps({'key': i, 'value': i}))
+
+    instance.query('''
+        CREATE MATERIALIZED VIEW test.consumer TO test.view AS
+            SELECT * FROM test.rabbitmq;
+    ''')
+    for i in range(40, 50):
+        channel.basic_publish(exchange='mv', routing_key='', body=json.dumps({'key': i, 'value': i}))
+
+    while True:
+        result = instance.query('SELECT * FROM test.view ORDER BY key')
+        if (rabbitmq_check_result(result)):
+            break
+
+    rabbitmq_check_result(result, True)
+
+    instance.query('DROP VIEW test.consumer')
+    for i in range(50, 60):
+        channel.basic_publish(exchange='mv', routing_key='', body=json.dumps({'key': i, 'value': i}))
+    connection.close()
+
+    count = 0
+    while True:
+        count = int(instance.query('SELECT count() FROM test.rabbitmq'))
+        if (count):
+            break
+
+    assert(count > 0)
+
+
+def test_rabbitmq_random_detach(rabbitmq_cluster):
+    NUM_CONSUMERS = 2
+    NUM_QUEUES = 2
+    instance.query('''
+        CREATE TABLE test.rabbitmq (key UInt64, value UInt64)
+            ENGINE = RabbitMQ
+            SETTINGS rabbitmq_host_port = 'rabbitmq1:5672',
+                     rabbitmq_exchange_name = 'random',
+                     rabbitmq_queue_base = 'random',
+                     rabbitmq_num_queues = 2,
+                     rabbitmq_num_consumers = 2,
+                     rabbitmq_format = 'JSONEachRow';
+        CREATE TABLE test.view (key UInt64, value UInt64, channel_id String)
+            ENGINE = MergeTree
+            ORDER BY key;
+        CREATE MATERIALIZED VIEW test.consumer TO test.view AS
+            SELECT *, _channel_id AS channel_id FROM test.rabbitmq;
+    ''')
+
+    i = [0]
+    messages_num = 10000
+
+    credentials = pika.PlainCredentials('root', 'clickhouse')
+    parameters = pika.ConnectionParameters(rabbitmq_cluster.rabbitmq_ip, rabbitmq_cluster.rabbitmq_port, '/', credentials)
+
+    def produce():
+        connection = pika.BlockingConnection(parameters)
+        channel = connection.channel()
+
+        messages = []
+        for i in range(messages_num):
+            messages.append(json.dumps({'key': i[0], 'value': i[0]}))
+            i[0] += 1
+            mes_id = str(i)
+            channel.basic_publish(exchange='test_sharding', routing_key='', properties=pika.BasicProperties(message_id=mes_id), body=message)
+        connection.close()
+
+    threads = []
+    threads_num = 20
+
+    for _ in range(threads_num):
+        threads.append(threading.Thread(target=produce))
+    for thread in threads:
+        time.sleep(random.uniform(0, 1))
+        thread.start()
+
+    time.sleep(5)
+    kill_rabbitmq(rabbitmq_cluster.rabbitmq_docker_id)
+    instance.query("detach table test.rabbitmq")
+    revive_rabbitmq(rabbitmq_cluster.rabbitmq_docker_id)
+
+    for thread in threads:
+        thread.join()
+
+
 if __name__ == '__main__':
     cluster.start()
     input("Cluster created, press any key to destroy...")