2021-08-24 12:30:31 +00:00
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#include <Coordination/KeeperDispatcher.h>
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2022-09-21 06:57:58 +00:00
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2021-11-05 10:21:34 +00:00
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#include <Poco/Path.h>
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2022-09-15 07:45:28 +00:00
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#include <Poco/Util/AbstractConfiguration.h>
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2022-09-15 09:01:43 +00:00
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2021-11-05 10:21:34 +00:00
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#include <Common/hex.h>
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2022-09-15 09:01:43 +00:00
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#include <Common/setThreadName.h>
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#include <Common/ZooKeeper/KeeperException.h>
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2021-11-18 20:17:22 +00:00
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#include <Common/checkStackSize.h>
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2022-06-10 07:49:46 +00:00
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#include <Common/CurrentMetrics.h>
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2022-09-15 09:01:43 +00:00
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#include <future>
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#include <chrono>
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#include <filesystem>
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2022-09-07 11:51:56 +00:00
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#include <iterator>
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2022-06-28 08:48:19 +00:00
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#include <limits>
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2022-06-10 07:49:46 +00:00
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namespace CurrentMetrics
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{
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extern const Metric KeeperAliveConnections;
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extern const Metric KeeperOutstandingRequets;
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}
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2021-11-12 12:48:42 +00:00
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namespace fs = std::filesystem;
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2021-01-19 14:22:28 +00:00
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int LOGICAL_ERROR;
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extern const int TIMEOUT_EXCEEDED;
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2021-10-08 13:32:02 +00:00
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extern const int SYSTEM_ERROR;
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2021-10-27 12:26:42 +00:00
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}
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2021-01-19 14:22:28 +00:00
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2021-08-24 12:30:31 +00:00
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KeeperDispatcher::KeeperDispatcher()
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2021-10-27 12:26:42 +00:00
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: responses_queue(std::numeric_limits<size_t>::max())
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2021-11-18 20:17:22 +00:00
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, configuration_and_settings(std::make_shared<KeeperConfigurationAndSettings>())
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2021-03-29 08:24:56 +00:00
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, log(&Poco::Logger::get("KeeperDispatcher"))
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2022-09-21 11:53:54 +00:00
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{}
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2021-04-16 13:50:09 +00:00
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2021-08-24 12:30:31 +00:00
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void KeeperDispatcher::requestThread()
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2021-01-19 14:22:28 +00:00
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{
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2021-03-29 08:24:56 +00:00
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setThreadName("KeeperReqT");
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2021-04-16 13:50:09 +00:00
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/// Result of requests batch from previous iteration
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2022-09-17 17:22:58 +00:00
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RaftAppendResult prev_result = nullptr;
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/// Requests from previous iteration. We store them to be able
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/// to send errors to the client.
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KeeperStorage::RequestsForSessions prev_batch;
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2021-04-16 13:50:09 +00:00
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2021-01-26 14:08:31 +00:00
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while (!shutdown_called)
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2021-01-19 14:22:28 +00:00
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{
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2021-03-29 08:24:56 +00:00
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KeeperStorage::RequestForSession request;
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2021-01-19 14:22:28 +00:00
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2021-11-18 20:17:22 +00:00
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auto coordination_settings = configuration_and_settings->coordination_settings;
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uint64_t max_wait = coordination_settings->operation_timeout_ms.totalMilliseconds();
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uint64_t max_batch_size = coordination_settings->max_requests_batch_size;
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2021-04-16 13:50:09 +00:00
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2022-09-17 17:22:58 +00:00
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/// The code below do a very simple thing: batch all write (quorum) requests into vector until
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/// previous write batch is not finished or max_batch size achieved. The main complexity goes from
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/// the ability to process read requests without quorum (from local state). So when we are collecting
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/// requests into a batch we must check that the new request is not read request. Otherwise we have to
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/// process all already accumulated write requests, wait them synchronously and only after that process
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/// read request. So reads are some kind of "separator" for writes.
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2021-04-16 13:50:09 +00:00
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try
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2021-01-26 07:47:04 +00:00
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{
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2022-09-17 17:22:58 +00:00
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if (requests_queue->tryPop(request, max_wait))
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2021-01-19 14:22:28 +00:00
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{
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2022-06-10 07:49:46 +00:00
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CurrentMetrics::sub(CurrentMetrics::KeeperOutstandingRequets);
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2021-04-16 13:50:09 +00:00
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if (shutdown_called)
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break;
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2022-09-17 17:22:58 +00:00
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KeeperStorage::RequestsForSessions current_batch;
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bool has_read_request = false;
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2021-04-16 13:50:09 +00:00
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2022-09-17 17:22:58 +00:00
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/// If new request is not read request or we must to process it through quorum.
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/// Otherwise we will process it locally.
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if (coordination_settings->quorum_reads || !request.request->isReadRequest())
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2021-04-16 13:50:09 +00:00
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{
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2022-09-17 17:22:58 +00:00
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current_batch.emplace_back(request);
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2021-04-16 13:50:09 +00:00
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2022-09-17 17:22:58 +00:00
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/// Waiting until previous append will be successful, or batch is big enough
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/// has_result == false && get_result_code == OK means that our request still not processed.
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/// Sometimes NuRaft set errorcode without setting result, so we check both here.
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while (prev_result && (!prev_result->has_result() && prev_result->get_result_code() == nuraft::cmd_result_code::OK) && current_batch.size() <= max_batch_size)
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2021-04-16 13:50:09 +00:00
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{
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2022-09-17 17:22:58 +00:00
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/// Trying to get batch requests as fast as possible
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if (requests_queue->tryPop(request, 1))
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{
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CurrentMetrics::sub(CurrentMetrics::KeeperOutstandingRequets);
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/// Don't append read request into batch, we have to process them separately
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if (!coordination_settings->quorum_reads && request.request->isReadRequest())
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{
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has_read_request = true;
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break;
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}
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else
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{
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current_batch.emplace_back(request);
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}
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}
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if (shutdown_called)
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2021-04-16 13:50:09 +00:00
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break;
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}
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2022-09-17 17:22:58 +00:00
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}
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else
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has_read_request = true;
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2021-04-16 13:50:09 +00:00
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2022-09-17 17:22:58 +00:00
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if (shutdown_called)
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break;
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/// Forcefully process all previous pending requests
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if (prev_result)
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forceWaitAndProcessResult(prev_result, prev_batch);
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/// Process collected write requests batch
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if (!current_batch.empty())
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{
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auto result = server->putRequestBatch(current_batch);
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2022-06-27 12:05:27 +00:00
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2022-09-17 17:22:58 +00:00
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if (result)
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2021-04-16 13:50:09 +00:00
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{
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2022-09-17 17:22:58 +00:00
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if (has_read_request) /// If we will execute read request next, than we have to process result now
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forceWaitAndProcessResult(result, current_batch);
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2021-04-16 13:50:09 +00:00
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}
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else
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{
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2022-09-17 17:22:58 +00:00
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addErrorResponses(current_batch, Coordination::Error::ZCONNECTIONLOSS);
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current_batch.clear();
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2021-04-16 13:50:09 +00:00
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}
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2022-09-17 17:22:58 +00:00
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prev_batch = std::move(current_batch);
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prev_result = result;
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2021-04-16 13:50:09 +00:00
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}
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2022-09-17 17:22:58 +00:00
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/// Read request always goes after write batch (last request)
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if (has_read_request)
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{
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if (server->isLeaderAlive())
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server->putLocalReadRequest(request);
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else
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addErrorResponses({request}, Coordination::Error::ZCONNECTIONLOSS);
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}
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2021-02-08 13:06:55 +00:00
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}
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}
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2021-04-16 13:50:09 +00:00
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catch (...)
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{
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tryLogCurrentException(__PRETTY_FUNCTION__);
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}
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2021-02-08 13:06:55 +00:00
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}
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}
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2021-08-24 12:30:31 +00:00
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void KeeperDispatcher::responseThread()
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2021-02-08 13:06:55 +00:00
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{
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2021-03-29 08:24:56 +00:00
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setThreadName("KeeperRspT");
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2021-02-08 13:06:55 +00:00
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while (!shutdown_called)
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{
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2021-03-29 08:24:56 +00:00
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KeeperStorage::ResponseForSession response_for_session;
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2021-02-08 13:06:55 +00:00
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2021-11-18 20:17:22 +00:00
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uint64_t max_wait = configuration_and_settings->coordination_settings->operation_timeout_ms.totalMilliseconds();
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2021-02-08 13:06:55 +00:00
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if (responses_queue.tryPop(response_for_session, max_wait))
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{
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if (shutdown_called)
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break;
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try
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{
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setResponse(response_for_session.session_id, response_for_session.response);
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2021-01-19 14:22:28 +00:00
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}
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2021-01-26 07:47:04 +00:00
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catch (...)
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{
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tryLogCurrentException(__PRETTY_FUNCTION__);
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}
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2021-01-19 14:22:28 +00:00
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}
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}
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}
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2021-08-24 12:30:31 +00:00
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void KeeperDispatcher::snapshotThread()
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2021-03-05 10:40:24 +00:00
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{
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2021-03-29 08:24:56 +00:00
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setThreadName("KeeperSnpT");
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2021-03-05 10:40:24 +00:00
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while (!shutdown_called)
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{
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CreateSnapshotTask task;
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2021-10-06 11:02:40 +00:00
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if (!snapshots_queue.pop(task))
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break;
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2021-03-05 10:40:24 +00:00
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if (shutdown_called)
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break;
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try
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{
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2022-09-15 14:06:22 +00:00
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[[maybe_unused]] auto snapshot_path = task.create_snapshot(std::move(task.snapshot));
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2022-09-14 09:09:47 +00:00
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if (snapshot_path.empty())
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continue;
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2022-09-21 11:53:54 +00:00
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if (isLeader())
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snapshot_s3.uploadSnapshot(snapshot_path);
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2022-09-14 09:09:47 +00:00
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}
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catch (...)
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{
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tryLogCurrentException(__PRETTY_FUNCTION__);
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}
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}
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}
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2021-08-24 12:30:31 +00:00
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void KeeperDispatcher::setResponse(int64_t session_id, const Coordination::ZooKeeperResponsePtr & response)
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2021-01-19 14:22:28 +00:00
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{
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std::lock_guard lock(session_to_response_callback_mutex);
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2021-08-24 12:30:31 +00:00
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/// Special new session response.
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2021-04-16 13:50:09 +00:00
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if (response->xid != Coordination::WATCH_XID && response->getOpNum() == Coordination::OpNum::SessionID)
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{
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const Coordination::ZooKeeperSessionIDResponse & session_id_resp = dynamic_cast<const Coordination::ZooKeeperSessionIDResponse &>(*response);
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2021-04-16 18:31:23 +00:00
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2021-04-16 13:50:09 +00:00
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/// Nobody waits for this session id
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2022-04-18 10:18:43 +00:00
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if (session_id_resp.server_id != server->getServerID() || !new_session_id_response_callback.contains(session_id_resp.internal_id))
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2021-04-16 13:50:09 +00:00
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return;
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auto callback = new_session_id_response_callback[session_id_resp.internal_id];
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callback(response);
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new_session_id_response_callback.erase(session_id_resp.internal_id);
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}
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2021-08-24 12:30:31 +00:00
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else /// Normal response, just write to client
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2021-04-16 13:50:09 +00:00
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{
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2021-08-24 12:30:31 +00:00
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auto session_response_callback = session_to_response_callback.find(session_id);
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/// Session was disconnected, just skip this response
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if (session_response_callback == session_to_response_callback.end())
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2021-11-20 17:35:41 +00:00
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{
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2022-07-07 15:16:42 +00:00
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LOG_TEST(log, "Cannot write response xid={}, op={}, session {} disconnected",
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response->xid, response->xid == Coordination::WATCH_XID ? "Watch" : toString(response->getOpNum()), session_id);
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2021-04-16 13:50:09 +00:00
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return;
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2021-11-20 17:35:41 +00:00
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}
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2021-04-16 13:50:09 +00:00
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2021-08-24 12:30:31 +00:00
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session_response_callback->second(response);
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2021-04-16 18:31:23 +00:00
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2021-04-16 13:50:09 +00:00
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/// Session closed, no more writes
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if (response->xid != Coordination::WATCH_XID && response->getOpNum() == Coordination::OpNum::Close)
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{
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2021-08-24 12:30:31 +00:00
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session_to_response_callback.erase(session_response_callback);
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2022-06-10 07:49:46 +00:00
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CurrentMetrics::sub(CurrentMetrics::KeeperAliveConnections);
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2021-04-16 13:50:09 +00:00
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}
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}
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2021-01-19 14:22:28 +00:00
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}
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2021-08-24 12:30:31 +00:00
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bool KeeperDispatcher::putRequest(const Coordination::ZooKeeperRequestPtr & request, int64_t session_id)
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2021-01-19 14:22:28 +00:00
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{
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{
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2021-08-24 12:30:31 +00:00
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/// If session was already disconnected than we will ignore requests
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2021-01-19 14:22:28 +00:00
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std::lock_guard lock(session_to_response_callback_mutex);
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2022-04-18 10:18:43 +00:00
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if (!session_to_response_callback.contains(session_id))
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2021-01-25 12:29:12 +00:00
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return false;
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2021-01-19 14:22:28 +00:00
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}
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2021-03-29 08:24:56 +00:00
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KeeperStorage::RequestForSession request_info;
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2021-01-19 14:22:28 +00:00
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request_info.request = request;
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2022-01-06 14:44:01 +00:00
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using namespace std::chrono;
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request_info.time = duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count();
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2021-01-19 14:22:28 +00:00
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request_info.session_id = session_id;
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std::lock_guard lock(push_request_mutex);
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2021-05-22 07:46:12 +00:00
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if (shutdown_called)
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return false;
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2021-01-19 14:22:28 +00:00
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/// Put close requests without timeouts
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if (request->getOpNum() == Coordination::OpNum::Close)
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2021-10-07 22:06:33 +00:00
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{
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2022-09-17 17:22:58 +00:00
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if (!requests_queue->push(std::move(request_info)))
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2021-10-08 13:32:02 +00:00
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throw Exception("Cannot push request to queue", ErrorCodes::SYSTEM_ERROR);
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2021-10-07 22:06:33 +00:00
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}
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2022-09-17 17:22:58 +00:00
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else if (!requests_queue->tryPush(std::move(request_info), configuration_and_settings->coordination_settings->operation_timeout_ms.totalMilliseconds()))
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2021-10-07 22:06:33 +00:00
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{
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2021-01-19 14:22:28 +00:00
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|
|
throw Exception("Cannot push request to queue within operation timeout", ErrorCodes::TIMEOUT_EXCEEDED);
|
2021-10-07 22:06:33 +00:00
|
|
|
}
|
2022-06-10 07:49:46 +00:00
|
|
|
CurrentMetrics::add(CurrentMetrics::KeeperOutstandingRequets);
|
2021-01-25 12:29:12 +00:00
|
|
|
return true;
|
2021-01-19 14:22:28 +00:00
|
|
|
}
|
|
|
|
|
2021-10-14 10:21:41 +00:00
|
|
|
void KeeperDispatcher::initialize(const Poco::Util::AbstractConfiguration & config, bool standalone_keeper, bool start_async)
|
2021-01-19 14:22:28 +00:00
|
|
|
{
|
2021-02-01 11:27:26 +00:00
|
|
|
LOG_DEBUG(log, "Initializing storage dispatcher");
|
2021-01-25 12:29:12 +00:00
|
|
|
|
2021-11-18 20:17:22 +00:00
|
|
|
configuration_and_settings = KeeperConfigurationAndSettings::loadFromConfig(config, standalone_keeper);
|
2022-09-17 17:22:58 +00:00
|
|
|
requests_queue = std::make_unique<RequestsQueue>(configuration_and_settings->coordination_settings->max_requests_batch_size);
|
2021-01-25 12:29:12 +00:00
|
|
|
|
2021-03-26 11:18:31 +00:00
|
|
|
request_thread = ThreadFromGlobalPool([this] { requestThread(); });
|
|
|
|
responses_thread = ThreadFromGlobalPool([this] { responseThread(); });
|
|
|
|
snapshot_thread = ThreadFromGlobalPool([this] { snapshotThread(); });
|
|
|
|
|
2022-09-22 13:03:27 +00:00
|
|
|
snapshot_s3.startup(config);
|
2021-03-26 11:18:31 +00:00
|
|
|
|
2022-09-17 17:22:58 +00:00
|
|
|
server = std::make_unique<KeeperServer>(configuration_and_settings, config, responses_queue, snapshots_queue);
|
2021-08-24 12:30:31 +00:00
|
|
|
|
2021-02-01 11:27:26 +00:00
|
|
|
try
|
2021-01-25 14:10:18 +00:00
|
|
|
{
|
2021-02-11 09:17:57 +00:00
|
|
|
LOG_DEBUG(log, "Waiting server to initialize");
|
2022-04-11 06:41:46 +00:00
|
|
|
server->startup(config, configuration_and_settings->enable_ipv6);
|
2021-02-11 09:58:02 +00:00
|
|
|
LOG_DEBUG(log, "Server initialized, waiting for quorum");
|
2021-02-11 09:49:49 +00:00
|
|
|
|
2021-10-14 10:21:41 +00:00
|
|
|
if (!start_async)
|
|
|
|
{
|
|
|
|
server->waitInit();
|
|
|
|
LOG_DEBUG(log, "Quorum initialized");
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
LOG_INFO(log, "Starting Keeper asynchronously, server will accept connections to Keeper when it will be ready");
|
|
|
|
}
|
2021-01-27 17:54:25 +00:00
|
|
|
}
|
2021-02-01 11:27:26 +00:00
|
|
|
catch (...)
|
2021-01-27 17:54:25 +00:00
|
|
|
{
|
2021-02-01 11:27:26 +00:00
|
|
|
tryLogCurrentException(__PRETTY_FUNCTION__);
|
|
|
|
throw;
|
2021-01-25 14:10:18 +00:00
|
|
|
}
|
2021-01-25 12:29:12 +00:00
|
|
|
|
2021-08-24 12:30:31 +00:00
|
|
|
/// Start it after keeper server start
|
2021-02-03 20:32:15 +00:00
|
|
|
session_cleaner_thread = ThreadFromGlobalPool([this] { sessionCleanerTask(); });
|
2021-10-19 12:00:26 +00:00
|
|
|
update_configuration_thread = ThreadFromGlobalPool([this] { updateConfigurationThread(); });
|
2021-01-25 12:29:12 +00:00
|
|
|
|
2021-02-01 11:27:26 +00:00
|
|
|
LOG_DEBUG(log, "Dispatcher initialized");
|
2021-01-19 14:22:28 +00:00
|
|
|
}
|
|
|
|
|
2021-08-24 12:30:31 +00:00
|
|
|
void KeeperDispatcher::shutdown()
|
2021-01-19 14:22:28 +00:00
|
|
|
{
|
|
|
|
try
|
|
|
|
{
|
2021-01-26 14:08:31 +00:00
|
|
|
{
|
|
|
|
std::lock_guard lock(push_request_mutex);
|
|
|
|
|
|
|
|
if (shutdown_called)
|
|
|
|
return;
|
|
|
|
|
2021-02-01 11:27:26 +00:00
|
|
|
LOG_DEBUG(log, "Shutting down storage dispatcher");
|
2021-01-26 14:08:31 +00:00
|
|
|
shutdown_called = true;
|
|
|
|
|
2021-02-03 20:32:15 +00:00
|
|
|
if (session_cleaner_thread.joinable())
|
|
|
|
session_cleaner_thread.join();
|
|
|
|
|
2022-09-17 17:22:58 +00:00
|
|
|
if (requests_queue)
|
2021-08-30 13:23:31 +00:00
|
|
|
{
|
2022-09-17 17:22:58 +00:00
|
|
|
requests_queue->finish();
|
2021-10-08 13:32:02 +00:00
|
|
|
|
|
|
|
if (request_thread.joinable())
|
|
|
|
request_thread.join();
|
2021-08-30 13:23:31 +00:00
|
|
|
}
|
2021-02-08 13:06:55 +00:00
|
|
|
|
2021-10-06 11:02:40 +00:00
|
|
|
responses_queue.finish();
|
2021-02-08 13:06:55 +00:00
|
|
|
if (responses_thread.joinable())
|
|
|
|
responses_thread.join();
|
2021-03-05 10:40:24 +00:00
|
|
|
|
2021-10-06 11:02:40 +00:00
|
|
|
snapshots_queue.finish();
|
2021-03-05 10:40:24 +00:00
|
|
|
if (snapshot_thread.joinable())
|
|
|
|
snapshot_thread.join();
|
2021-10-19 12:00:26 +00:00
|
|
|
|
2022-09-21 11:53:54 +00:00
|
|
|
snapshot_s3.shutdown();
|
2022-09-14 09:09:47 +00:00
|
|
|
|
2021-10-19 12:00:26 +00:00
|
|
|
update_configuration_queue.finish();
|
|
|
|
if (update_configuration_thread.joinable())
|
|
|
|
update_configuration_thread.join();
|
2021-01-26 14:08:31 +00:00
|
|
|
}
|
|
|
|
|
2021-09-02 09:20:11 +00:00
|
|
|
KeeperStorage::RequestForSession request_for_session;
|
2021-08-30 13:23:31 +00:00
|
|
|
|
2021-09-02 09:20:11 +00:00
|
|
|
/// Set session expired for all pending requests
|
2022-09-17 17:22:58 +00:00
|
|
|
while (requests_queue && requests_queue->tryPop(request_for_session))
|
2021-09-02 09:20:11 +00:00
|
|
|
{
|
2022-06-10 07:49:46 +00:00
|
|
|
CurrentMetrics::sub(CurrentMetrics::KeeperOutstandingRequets);
|
2021-10-07 17:13:56 +00:00
|
|
|
auto response = request_for_session.request->makeResponse();
|
|
|
|
response->error = Coordination::Error::ZSESSIONEXPIRED;
|
|
|
|
setResponse(request_for_session.session_id, response);
|
2021-01-26 14:08:31 +00:00
|
|
|
}
|
2021-05-22 07:50:23 +00:00
|
|
|
|
2022-09-12 12:22:48 +00:00
|
|
|
KeeperStorage::RequestsForSessions close_requests;
|
|
|
|
{
|
|
|
|
/// Clear all registered sessions
|
|
|
|
std::lock_guard lock(session_to_response_callback_mutex);
|
|
|
|
|
2022-09-16 10:03:21 +00:00
|
|
|
if (server && hasLeader())
|
2022-09-12 12:22:48 +00:00
|
|
|
{
|
2022-09-12 18:19:41 +00:00
|
|
|
close_requests.reserve(session_to_response_callback.size());
|
2022-09-12 12:22:48 +00:00
|
|
|
// send to leader CLOSE requests for active sessions
|
|
|
|
for (const auto & [session, response] : session_to_response_callback)
|
|
|
|
{
|
2022-09-13 09:51:46 +00:00
|
|
|
auto request = Coordination::ZooKeeperRequestFactory::instance().get(Coordination::OpNum::Close);
|
2022-09-12 12:22:48 +00:00
|
|
|
request->xid = Coordination::CLOSE_XID;
|
|
|
|
using namespace std::chrono;
|
2022-09-13 09:51:46 +00:00
|
|
|
KeeperStorage::RequestForSession request_info
|
|
|
|
{
|
|
|
|
.session_id = session,
|
|
|
|
.time = duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count(),
|
|
|
|
.request = std::move(request),
|
|
|
|
};
|
2022-09-12 12:22:48 +00:00
|
|
|
|
|
|
|
close_requests.push_back(std::move(request_info));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
session_to_response_callback.clear();
|
|
|
|
}
|
|
|
|
|
|
|
|
// if there is no leader, there is no reason to do CLOSE because it's a write request
|
2022-09-16 10:03:21 +00:00
|
|
|
if (server && hasLeader() && !close_requests.empty())
|
2022-09-12 12:22:48 +00:00
|
|
|
{
|
|
|
|
LOG_INFO(log, "Trying to close {} session(s)", close_requests.size());
|
|
|
|
const auto raft_result = server->putRequestBatch(close_requests);
|
2022-09-12 18:19:41 +00:00
|
|
|
auto sessions_closing_done_promise = std::make_shared<std::promise<void>>();
|
|
|
|
auto sessions_closing_done = sessions_closing_done_promise->get_future();
|
|
|
|
raft_result->when_ready([sessions_closing_done_promise = std::move(sessions_closing_done_promise)](
|
|
|
|
nuraft::cmd_result<nuraft::ptr<nuraft::buffer>> & /*result*/,
|
|
|
|
nuraft::ptr<std::exception> & /*exception*/) { sessions_closing_done_promise->set_value(); });
|
2022-09-12 12:22:48 +00:00
|
|
|
|
|
|
|
auto session_shutdown_timeout = configuration_and_settings->coordination_settings->session_shutdown_timeout.totalMilliseconds();
|
2022-09-12 18:19:41 +00:00
|
|
|
if (sessions_closing_done.wait_for(std::chrono::milliseconds(session_shutdown_timeout)) != std::future_status::ready)
|
|
|
|
LOG_WARNING(
|
|
|
|
log,
|
|
|
|
"Failed to close sessions in {}ms. If they are not closed, they will be closed after session timeout.",
|
|
|
|
session_shutdown_timeout);
|
2022-09-12 12:22:48 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (server)
|
|
|
|
server->shutdown();
|
|
|
|
|
2022-06-10 07:49:46 +00:00
|
|
|
CurrentMetrics::set(CurrentMetrics::KeeperAliveConnections, 0);
|
2022-09-12 12:22:48 +00:00
|
|
|
|
2021-01-19 14:22:28 +00:00
|
|
|
}
|
|
|
|
catch (...)
|
|
|
|
{
|
|
|
|
tryLogCurrentException(__PRETTY_FUNCTION__);
|
|
|
|
}
|
2021-02-01 11:27:26 +00:00
|
|
|
|
|
|
|
LOG_DEBUG(log, "Dispatcher shut down");
|
2021-01-19 14:22:28 +00:00
|
|
|
}
|
|
|
|
|
2022-04-13 14:08:13 +00:00
|
|
|
void KeeperDispatcher::forceRecovery()
|
|
|
|
{
|
|
|
|
server->forceRecovery();
|
|
|
|
}
|
|
|
|
|
2021-08-24 12:30:31 +00:00
|
|
|
KeeperDispatcher::~KeeperDispatcher()
|
2021-01-26 14:08:31 +00:00
|
|
|
{
|
|
|
|
shutdown();
|
|
|
|
}
|
|
|
|
|
2021-08-24 12:30:31 +00:00
|
|
|
void KeeperDispatcher::registerSession(int64_t session_id, ZooKeeperResponseCallback callback)
|
2021-01-19 14:22:28 +00:00
|
|
|
{
|
|
|
|
std::lock_guard lock(session_to_response_callback_mutex);
|
|
|
|
if (!session_to_response_callback.try_emplace(session_id, callback).second)
|
|
|
|
throw Exception(DB::ErrorCodes::LOGICAL_ERROR, "Session with id {} already registered in dispatcher", session_id);
|
2022-06-10 07:49:46 +00:00
|
|
|
CurrentMetrics::add(CurrentMetrics::KeeperAliveConnections);
|
2021-01-19 14:22:28 +00:00
|
|
|
}
|
|
|
|
|
2021-08-24 12:30:31 +00:00
|
|
|
void KeeperDispatcher::sessionCleanerTask()
|
2021-02-03 20:32:15 +00:00
|
|
|
{
|
|
|
|
while (true)
|
|
|
|
{
|
|
|
|
if (shutdown_called)
|
|
|
|
return;
|
|
|
|
|
|
|
|
try
|
|
|
|
{
|
2021-08-24 12:30:31 +00:00
|
|
|
/// Only leader node must check dead sessions
|
2021-10-14 10:21:41 +00:00
|
|
|
if (server->checkInit() && isLeader())
|
2021-02-03 20:32:15 +00:00
|
|
|
{
|
|
|
|
auto dead_sessions = server->getDeadSessions();
|
2021-08-24 12:30:31 +00:00
|
|
|
|
2021-02-03 20:32:15 +00:00
|
|
|
for (int64_t dead_session : dead_sessions)
|
|
|
|
{
|
|
|
|
LOG_INFO(log, "Found dead session {}, will try to close it", dead_session);
|
2021-08-24 12:30:31 +00:00
|
|
|
|
|
|
|
/// Close session == send close request to raft server
|
2022-09-13 09:51:46 +00:00
|
|
|
auto request = Coordination::ZooKeeperRequestFactory::instance().get(Coordination::OpNum::Close);
|
2021-02-03 20:32:15 +00:00
|
|
|
request->xid = Coordination::CLOSE_XID;
|
2022-01-13 09:49:39 +00:00
|
|
|
using namespace std::chrono;
|
2022-09-13 09:51:46 +00:00
|
|
|
KeeperStorage::RequestForSession request_info
|
|
|
|
{
|
|
|
|
.session_id = dead_session,
|
|
|
|
.time = duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count(),
|
|
|
|
.request = std::move(request),
|
|
|
|
};
|
2021-02-09 18:29:06 +00:00
|
|
|
{
|
|
|
|
std::lock_guard lock(push_request_mutex);
|
2022-09-17 17:22:58 +00:00
|
|
|
if (!requests_queue->push(std::move(request_info)))
|
2021-10-08 13:32:02 +00:00
|
|
|
LOG_INFO(log, "Cannot push close request to queue while cleaning outdated sessions");
|
2022-06-10 07:49:46 +00:00
|
|
|
CurrentMetrics::add(CurrentMetrics::KeeperOutstandingRequets);
|
2021-02-09 18:29:06 +00:00
|
|
|
}
|
2021-08-24 12:30:31 +00:00
|
|
|
|
|
|
|
/// Remove session from registered sessions
|
2021-02-08 13:06:55 +00:00
|
|
|
finishSession(dead_session);
|
2021-02-10 09:28:53 +00:00
|
|
|
LOG_INFO(log, "Dead session close request pushed");
|
2021-02-03 20:32:15 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
catch (...)
|
|
|
|
{
|
|
|
|
tryLogCurrentException(__PRETTY_FUNCTION__);
|
|
|
|
}
|
|
|
|
|
2021-11-18 20:17:22 +00:00
|
|
|
auto time_to_sleep = configuration_and_settings->coordination_settings->dead_session_check_period_ms.totalMilliseconds();
|
|
|
|
std::this_thread::sleep_for(std::chrono::milliseconds(time_to_sleep));
|
2021-02-03 20:32:15 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2021-08-24 12:30:31 +00:00
|
|
|
void KeeperDispatcher::finishSession(int64_t session_id)
|
2021-01-21 11:37:20 +00:00
|
|
|
{
|
|
|
|
std::lock_guard lock(session_to_response_callback_mutex);
|
|
|
|
auto session_it = session_to_response_callback.find(session_id);
|
|
|
|
if (session_it != session_to_response_callback.end())
|
2022-06-10 07:49:46 +00:00
|
|
|
{
|
2021-01-21 11:37:20 +00:00
|
|
|
session_to_response_callback.erase(session_it);
|
2022-06-10 07:49:46 +00:00
|
|
|
CurrentMetrics::sub(CurrentMetrics::KeeperAliveConnections);
|
|
|
|
}
|
2021-01-21 11:37:20 +00:00
|
|
|
}
|
|
|
|
|
2021-08-24 12:30:31 +00:00
|
|
|
void KeeperDispatcher::addErrorResponses(const KeeperStorage::RequestsForSessions & requests_for_sessions, Coordination::Error error)
|
2021-04-16 13:50:09 +00:00
|
|
|
{
|
2022-06-15 12:48:30 +00:00
|
|
|
for (const auto & request_for_session : requests_for_sessions)
|
2021-04-16 13:50:09 +00:00
|
|
|
{
|
|
|
|
KeeperStorage::ResponsesForSessions responses;
|
2022-06-15 12:48:30 +00:00
|
|
|
auto response = request_for_session.request->makeResponse();
|
|
|
|
response->xid = request_for_session.request->xid;
|
|
|
|
response->zxid = 0;
|
2021-04-16 13:50:09 +00:00
|
|
|
response->error = error;
|
2022-06-15 12:48:30 +00:00
|
|
|
if (!responses_queue.push(DB::KeeperStorage::ResponseForSession{request_for_session.session_id, response}))
|
2021-10-08 13:32:02 +00:00
|
|
|
throw Exception(ErrorCodes::SYSTEM_ERROR,
|
2021-10-08 08:48:08 +00:00
|
|
|
"Could not push error response xid {} zxid {} error message {} to responses queue",
|
|
|
|
response->xid,
|
|
|
|
response->zxid,
|
|
|
|
errorMessage(error));
|
2021-04-16 13:50:09 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
|
2022-09-17 17:22:58 +00:00
|
|
|
void KeeperDispatcher::forceWaitAndProcessResult(RaftAppendResult & result, KeeperStorage::RequestsForSessions & requests_for_sessions)
|
2021-04-16 13:50:09 +00:00
|
|
|
{
|
|
|
|
if (!result->has_result())
|
|
|
|
result->get();
|
|
|
|
|
2022-09-17 17:22:58 +00:00
|
|
|
/// If we get some errors, than send them to clients
|
|
|
|
if (!result->get_accepted() || result->get_result_code() == nuraft::cmd_result_code::TIMEOUT)
|
|
|
|
addErrorResponses(requests_for_sessions, Coordination::Error::ZOPERATIONTIMEOUT);
|
|
|
|
else if (result->get_result_code() != nuraft::cmd_result_code::OK)
|
|
|
|
addErrorResponses(requests_for_sessions, Coordination::Error::ZCONNECTIONLOSS);
|
|
|
|
|
2021-04-16 13:50:09 +00:00
|
|
|
result = nullptr;
|
2022-09-17 17:22:58 +00:00
|
|
|
requests_for_sessions.clear();
|
2021-04-16 13:50:09 +00:00
|
|
|
}
|
|
|
|
|
2021-08-24 12:30:31 +00:00
|
|
|
int64_t KeeperDispatcher::getSessionID(int64_t session_timeout_ms)
|
2021-04-16 13:50:09 +00:00
|
|
|
{
|
2021-08-24 12:30:31 +00:00
|
|
|
/// New session id allocation is a special request, because we cannot process it in normal
|
|
|
|
/// way: get request -> put to raft -> set response for registered callback.
|
2021-04-16 13:50:09 +00:00
|
|
|
KeeperStorage::RequestForSession request_info;
|
|
|
|
std::shared_ptr<Coordination::ZooKeeperSessionIDRequest> request = std::make_shared<Coordination::ZooKeeperSessionIDRequest>();
|
2021-08-24 12:30:31 +00:00
|
|
|
/// Internal session id. It's a temporary number which is unique for each client on this server
|
|
|
|
/// but can be same on different servers.
|
2021-04-16 13:50:09 +00:00
|
|
|
request->internal_id = internal_session_id_counter.fetch_add(1);
|
|
|
|
request->session_timeout_ms = session_timeout_ms;
|
2021-04-16 18:31:23 +00:00
|
|
|
request->server_id = server->getServerID();
|
|
|
|
|
2021-04-16 13:50:09 +00:00
|
|
|
request_info.request = request;
|
2022-01-13 09:49:39 +00:00
|
|
|
using namespace std::chrono;
|
|
|
|
request_info.time = duration_cast<milliseconds>(system_clock::now().time_since_epoch()).count();
|
2021-04-16 13:50:09 +00:00
|
|
|
request_info.session_id = -1;
|
|
|
|
|
|
|
|
auto promise = std::make_shared<std::promise<int64_t>>();
|
|
|
|
auto future = promise->get_future();
|
2021-08-24 12:30:31 +00:00
|
|
|
|
2021-04-16 13:50:09 +00:00
|
|
|
{
|
|
|
|
std::lock_guard lock(session_to_response_callback_mutex);
|
2021-04-16 18:31:23 +00:00
|
|
|
new_session_id_response_callback[request->internal_id] = [promise, internal_id = request->internal_id] (const Coordination::ZooKeeperResponsePtr & response)
|
2021-04-16 13:50:09 +00:00
|
|
|
{
|
|
|
|
if (response->getOpNum() != Coordination::OpNum::SessionID)
|
|
|
|
promise->set_exception(std::make_exception_ptr(Exception(ErrorCodes::LOGICAL_ERROR,
|
|
|
|
"Incorrect response of type {} instead of SessionID response", Coordination::toString(response->getOpNum()))));
|
|
|
|
|
2021-04-16 18:31:23 +00:00
|
|
|
auto session_id_response = dynamic_cast<const Coordination::ZooKeeperSessionIDResponse &>(*response);
|
|
|
|
if (session_id_response.internal_id != internal_id)
|
|
|
|
{
|
|
|
|
promise->set_exception(std::make_exception_ptr(Exception(ErrorCodes::LOGICAL_ERROR,
|
|
|
|
"Incorrect response with internal id {} instead of {}", session_id_response.internal_id, internal_id)));
|
|
|
|
}
|
|
|
|
|
2021-04-16 13:50:09 +00:00
|
|
|
if (response->error != Coordination::Error::ZOK)
|
|
|
|
promise->set_exception(std::make_exception_ptr(zkutil::KeeperException("SessionID request failed with error", response->error)));
|
|
|
|
|
2021-04-16 18:31:23 +00:00
|
|
|
promise->set_value(session_id_response.session_id);
|
2021-04-16 13:50:09 +00:00
|
|
|
};
|
|
|
|
}
|
|
|
|
|
2021-08-24 12:30:31 +00:00
|
|
|
/// Push new session request to queue
|
2021-04-16 13:50:09 +00:00
|
|
|
{
|
|
|
|
std::lock_guard lock(push_request_mutex);
|
2022-09-17 17:22:58 +00:00
|
|
|
if (!requests_queue->tryPush(std::move(request_info), session_timeout_ms))
|
2021-04-16 13:50:09 +00:00
|
|
|
throw Exception("Cannot push session id request to queue within session timeout", ErrorCodes::TIMEOUT_EXCEEDED);
|
2022-06-10 07:49:46 +00:00
|
|
|
CurrentMetrics::add(CurrentMetrics::KeeperOutstandingRequets);
|
2021-04-16 13:50:09 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
if (future.wait_for(std::chrono::milliseconds(session_timeout_ms)) != std::future_status::ready)
|
|
|
|
throw Exception("Cannot receive session id within session timeout", ErrorCodes::TIMEOUT_EXCEEDED);
|
|
|
|
|
2021-08-24 12:30:31 +00:00
|
|
|
/// Forcefully wait for request execution because we cannot process any other
|
|
|
|
/// requests for this client until it get new session id.
|
2021-04-16 13:50:09 +00:00
|
|
|
return future.get();
|
|
|
|
}
|
|
|
|
|
2021-10-19 12:00:26 +00:00
|
|
|
|
|
|
|
void KeeperDispatcher::updateConfigurationThread()
|
2021-10-18 15:27:51 +00:00
|
|
|
{
|
2021-10-19 12:00:26 +00:00
|
|
|
while (true)
|
2021-10-18 15:27:51 +00:00
|
|
|
{
|
2021-10-19 12:00:26 +00:00
|
|
|
if (shutdown_called)
|
|
|
|
return;
|
|
|
|
|
|
|
|
try
|
|
|
|
{
|
2022-04-26 07:32:02 +00:00
|
|
|
using namespace std::chrono_literals;
|
2021-10-19 12:00:26 +00:00
|
|
|
if (!server->checkInit())
|
|
|
|
{
|
|
|
|
LOG_INFO(log, "Server still not initialized, will not apply configuration until initialization finished");
|
2022-04-26 07:32:02 +00:00
|
|
|
std::this_thread::sleep_for(5000ms);
|
2021-10-19 12:00:26 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2022-04-19 08:08:13 +00:00
|
|
|
if (server->isRecovering())
|
|
|
|
{
|
|
|
|
LOG_INFO(log, "Server is recovering, will not apply configuration until recovery is finished");
|
2022-04-26 07:32:02 +00:00
|
|
|
std::this_thread::sleep_for(5000ms);
|
2022-04-19 08:08:13 +00:00
|
|
|
continue;
|
|
|
|
}
|
|
|
|
|
2021-10-19 12:00:26 +00:00
|
|
|
ConfigUpdateAction action;
|
|
|
|
if (!update_configuration_queue.pop(action))
|
|
|
|
break;
|
2021-10-19 13:11:29 +00:00
|
|
|
|
|
|
|
|
|
|
|
/// We must wait this update from leader or apply it ourself (if we are leader)
|
|
|
|
bool done = false;
|
|
|
|
while (!done)
|
2021-10-19 12:00:26 +00:00
|
|
|
{
|
2022-04-19 08:08:13 +00:00
|
|
|
if (server->isRecovering())
|
|
|
|
break;
|
|
|
|
|
2021-10-19 13:11:29 +00:00
|
|
|
if (shutdown_called)
|
|
|
|
return;
|
2021-10-19 12:00:26 +00:00
|
|
|
|
2021-10-19 13:11:29 +00:00
|
|
|
if (isLeader())
|
|
|
|
{
|
|
|
|
server->applyConfigurationUpdate(action);
|
|
|
|
done = true;
|
|
|
|
}
|
|
|
|
else
|
|
|
|
{
|
|
|
|
done = server->waitConfigurationUpdate(action);
|
|
|
|
if (!done)
|
|
|
|
LOG_INFO(log, "Cannot wait for configuration update, maybe we become leader, or maybe update is invalid, will try to wait one more time");
|
|
|
|
}
|
2021-10-19 12:00:26 +00:00
|
|
|
}
|
|
|
|
}
|
|
|
|
catch (...)
|
|
|
|
{
|
|
|
|
tryLogCurrentException(__PRETTY_FUNCTION__);
|
|
|
|
}
|
2021-10-18 15:27:51 +00:00
|
|
|
}
|
2021-10-19 12:00:26 +00:00
|
|
|
}
|
|
|
|
|
2022-04-14 12:00:47 +00:00
|
|
|
bool KeeperDispatcher::isServerActive() const
|
|
|
|
{
|
|
|
|
return checkInit() && hasLeader() && !server->isRecovering();
|
|
|
|
}
|
|
|
|
|
2021-10-19 12:00:26 +00:00
|
|
|
void KeeperDispatcher::updateConfiguration(const Poco::Util::AbstractConfiguration & config)
|
|
|
|
{
|
|
|
|
auto diff = server->getConfigurationDiff(config);
|
|
|
|
if (diff.empty())
|
|
|
|
LOG_TRACE(log, "Configuration update triggered, but nothing changed for RAFT");
|
|
|
|
else if (diff.size() > 1)
|
|
|
|
LOG_WARNING(log, "Configuration changed for more than one server ({}) from cluster, it's strictly not recommended", diff.size());
|
2021-10-18 15:27:51 +00:00
|
|
|
else
|
2021-10-19 12:00:26 +00:00
|
|
|
LOG_DEBUG(log, "Configuration change size ({})", diff.size());
|
|
|
|
|
|
|
|
for (auto & change : diff)
|
2021-10-18 15:27:51 +00:00
|
|
|
{
|
2021-10-19 12:00:26 +00:00
|
|
|
bool push_result = update_configuration_queue.push(change);
|
|
|
|
if (!push_result)
|
|
|
|
throw Exception(ErrorCodes::SYSTEM_ERROR, "Cannot push configuration update to queue");
|
2021-10-18 15:27:51 +00:00
|
|
|
}
|
2022-09-15 07:45:28 +00:00
|
|
|
|
2022-09-21 11:53:54 +00:00
|
|
|
snapshot_s3.updateS3Configuration(config);
|
2021-10-18 15:27:51 +00:00
|
|
|
}
|
|
|
|
|
2021-11-18 20:17:22 +00:00
|
|
|
void KeeperDispatcher::updateKeeperStatLatency(uint64_t process_time_ms)
|
2021-10-27 12:26:42 +00:00
|
|
|
{
|
2021-11-18 20:17:22 +00:00
|
|
|
keeper_stats.updateLatency(process_time_ms);
|
2021-10-27 12:26:42 +00:00
|
|
|
}
|
|
|
|
|
2021-11-18 20:17:22 +00:00
|
|
|
static uint64_t getDirSize(const fs::path & dir)
|
2021-10-27 12:26:42 +00:00
|
|
|
{
|
2021-11-18 20:17:22 +00:00
|
|
|
checkStackSize();
|
|
|
|
if (!fs::exists(dir))
|
|
|
|
return 0;
|
2021-10-27 12:26:42 +00:00
|
|
|
|
2021-11-18 20:17:22 +00:00
|
|
|
fs::directory_iterator it(dir);
|
|
|
|
fs::directory_iterator end;
|
2021-10-27 12:26:42 +00:00
|
|
|
|
2021-11-18 20:17:22 +00:00
|
|
|
uint64_t size{0};
|
|
|
|
while (it != end)
|
|
|
|
{
|
|
|
|
if (it->is_regular_file())
|
|
|
|
size += fs::file_size(*it);
|
|
|
|
else
|
|
|
|
size += getDirSize(it->path());
|
|
|
|
++it;
|
|
|
|
}
|
|
|
|
return size;
|
2021-10-27 12:26:42 +00:00
|
|
|
}
|
|
|
|
|
2021-11-18 20:17:22 +00:00
|
|
|
uint64_t KeeperDispatcher::getLogDirSize() const
|
2021-11-05 10:21:34 +00:00
|
|
|
{
|
2021-11-18 20:17:22 +00:00
|
|
|
return getDirSize(configuration_and_settings->log_storage_path);
|
2021-11-05 10:21:34 +00:00
|
|
|
}
|
|
|
|
|
2021-11-18 20:17:22 +00:00
|
|
|
uint64_t KeeperDispatcher::getSnapDirSize() const
|
2021-11-05 10:21:34 +00:00
|
|
|
{
|
2021-11-18 20:17:22 +00:00
|
|
|
return getDirSize(configuration_and_settings->snapshot_storage_path);
|
2021-11-05 10:21:34 +00:00
|
|
|
}
|
|
|
|
|
2021-11-19 09:30:58 +00:00
|
|
|
Keeper4LWInfo KeeperDispatcher::getKeeper4LWInfo() const
|
2021-10-27 12:26:42 +00:00
|
|
|
{
|
2022-07-01 13:57:24 +00:00
|
|
|
Keeper4LWInfo result = server->getPartiallyFilled4LWInfo();
|
2021-11-18 20:17:22 +00:00
|
|
|
{
|
|
|
|
std::lock_guard lock(push_request_mutex);
|
2022-09-17 17:22:58 +00:00
|
|
|
result.outstanding_requests_count = requests_queue->size();
|
2021-11-18 20:17:22 +00:00
|
|
|
}
|
|
|
|
{
|
|
|
|
std::lock_guard lock(session_to_response_callback_mutex);
|
|
|
|
result.alive_connections_count = session_to_response_callback.size();
|
|
|
|
}
|
|
|
|
return result;
|
2021-11-05 10:21:34 +00:00
|
|
|
}
|
|
|
|
|
2021-01-19 14:22:28 +00:00
|
|
|
}
|