Fix lazy initialization in RabbitMQ, fix possible deadlock on insert into unitialized queue engine

src/Storages/IMessageProducer.cpp

@@ -12,7 +12,16 @@ void AsynchronousMessageProducer::start(const ContextPtr & context)
 {
     LOG_TEST(log, "Executing startup");
 
-    initialize();
+    try
+    {
+        initialize();
+    }
+    catch (...)
+    {
+        finished = true;
+        throw;
+    }
+
     producing_task = context->getSchedulePool().createTask(getProducingTaskName(), [this]
     {
         LOG_TEST(log, "Starting producing task loop");

src/Storages/RabbitMQ/StorageRabbitMQ.cpp

@@ -69,7 +69,7 @@ StorageRabbitMQ::StorageRabbitMQ(
         ContextPtr context_,
         const ColumnsDescription & columns_,
         std::unique_ptr<RabbitMQSettings> rabbitmq_settings_,
-        bool is_attach_)
+        bool is_attach)
         : IStorage(table_id_)
         , WithContext(context_->getGlobalContext())
         , rabbitmq_settings(std::move(rabbitmq_settings_))
@@ -91,7 +91,6 @@ StorageRabbitMQ::StorageRabbitMQ(
         , unique_strbase(getRandomName())
         , queue_size(std::max(QUEUE_SIZE, static_cast<uint32_t>(getMaxBlockSize())))
         , milliseconds_to_wait(rabbitmq_settings->rabbitmq_empty_queue_backoff_start_ms)
-        , is_attach(is_attach_)
 {
     const auto & config = getContext()->getConfigRef();
 
@@ -318,10 +317,11 @@ void StorageRabbitMQ::connectionFunc()
     try
     {
         if (connection->reconnect())
+        {
             initRabbitMQ();
-
-        streaming_task->scheduleAfter(RESCHEDULE_MS);
-        return;
+            streaming_task->scheduleAfter(RESCHEDULE_MS);
+            return;
+        }
     }
     catch (...)
     {
@@ -373,57 +373,37 @@ void StorageRabbitMQ::initRabbitMQ()
     }
     else
     {
-        try
+        auto rabbit_channel = connection->createChannel();
+
+        /// Main exchange -> Bridge exchange -> ( Sharding exchange ) -> Queues -> Consumers
+
+        initExchange(*rabbit_channel);
+        bindExchange(*rabbit_channel);
+
+        for (const auto i : collections::range(0, num_queues))
+            bindQueue(i + 1, *rabbit_channel);
+
+        if (queues.size() != num_queues)
         {
-            auto rabbit_channel = connection->createChannel();
-
-            /// Main exchange -> Bridge exchange -> ( Sharding exchange ) -> Queues -> Consumers
-
-            initExchange(*rabbit_channel);
-            bindExchange(*rabbit_channel);
-
-            for (const auto i : collections::range(0, num_queues))
-                bindQueue(i + 1, *rabbit_channel);
-
-            if (queues.size() != num_queues)
-            {
-                throw Exception(
-                    ErrorCodes::LOGICAL_ERROR,
-                    "Expected all queues to be initialized (but having {}/{})",
-                    queues.size(), num_queues);
-            }
-
-            LOG_TRACE(log, "RabbitMQ setup completed");
-            rabbit_channel->close();
-        }
-        catch (...)
-        {
-            tryLogCurrentException(log);
-            if (is_attach)
-                return; /// A user will have to reattach the table.
-            throw;
+            throw Exception(
+                ErrorCodes::LOGICAL_ERROR,
+                "Expected all queues to be initialized (but having {}/{})",
+                queues.size(), num_queues);
         }
+
+        LOG_TRACE(log, "RabbitMQ setup completed");
+        rabbit_channel->close();
     }
 
     LOG_TRACE(log, "Registering {} conumers", num_consumers);
 
     for (size_t i = 0; i < num_consumers; ++i)
     {
-        try
-        {
-            auto consumer = createConsumer();
-            consumer->updateChannel(*connection);
-            consumers_ref.push_back(consumer);
-            pushConsumer(consumer);
-            ++num_created_consumers;
-        }
-        catch (...)
-        {
-            if (!is_attach)
-                throw;
-
-            tryLogCurrentException(log);
-        }
+        auto consumer = createConsumer();
+        consumer->updateChannel(*connection);
+        consumers_ref.push_back(consumer);
+        pushConsumer(consumer);
+        ++num_created_consumers;
     }
 
     LOG_TRACE(log, "Registered {}/{} conumers", num_created_consumers, num_consumers);

src/Storages/RabbitMQ/StorageRabbitMQ.h

@@ -27,7 +27,7 @@ public:
             ContextPtr context_,
             const ColumnsDescription & columns_,
             std::unique_ptr<RabbitMQSettings> rabbitmq_settings_,
-            bool is_attach_);
+            bool is_attach);
 
     std::string getName() const override { return "RabbitMQ"; }
 
@@ -158,10 +158,9 @@ private:
 
     size_t read_attempts = 0;
     mutable bool drop_table = false;
-    bool is_attach;
 
     RabbitMQConsumerPtr createConsumer();
-    bool initialized = false;
+    std::atomic<bool> initialized = false;
 
     /// Functions working in the background
     void streamingToViewsFunc();

tests/integration/test_storage_rabbitmq/test.py

@@ -3538,3 +3538,15 @@ def test_rabbitmq_handle_error_mode_stream(rabbitmq_cluster):
 
     expected = "".join(sorted(expected))
     assert broken_messages == expected
+
+
+def test_attach_broken_table(rabbitmq_cluster):
+    instance.query(
+        "ATTACH TABLE rabbit_queue UUID '2d1cdf1a-f060-4a61-a7c9-5b59e59992c6' (`payload` String) ENGINE = RabbitMQ SETTINGS rabbitmq_host_port = 'nonexisting:5671', rabbitmq_format = 'JSONEachRow', rabbitmq_username = 'test', rabbitmq_password = 'test'"
+    )
+
+    error = instance.query_and_get_error("SELECT * FROM rabbit_queue")
+    assert "CANNOT_CONNECT_RABBITMQ" in error
+
+    error = instance.query_and_get_error("INSERT INTO rabbit_queue VALUES ('test')")
+    assert "CANNOT_CONNECT_RABBITMQ" in error