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9487e0b259
MariaDB 10.4 was crashing when thread-handling was set to pool-of-threads and wsrep was enabled. There were two apparent reasons for the crash: - Connection handling in threadpool_common.cc was missing calls to control wsrep client state. - Thread specific storage which contains thread variables (THR_KEY_mysys) was not handled appropriately by wsrep patch when pool-of-threads was configured. This patch addresses the above issues in the following way: - Wsrep client state open/close was moved in thd_prepare_connection() and end_connection() to have common handling for one-thread-per-connection and pool-of-threads. - Thread local storage handling in wsrep patch was reworked by introducing set of wsrep_xxx_threadvars() calls which replace calls to THD store_globals()/reset_globals() and deal with thread handling specifics internally. Wsrep-lib was updated to version which relaxes internal concurrency related sanity checks. Rollback code from wsrep_rollback_process() was extracted to separate calls for better readability. Post rollback thread was removed as it was completely unused.
90 lines
2.8 KiB
C++
90 lines
2.8 KiB
C++
/* Copyright 2018 Codership Oy <info@codership.com>
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef WSREP_SERVER_SERVICE_H
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#define WSREP_SERVER_SERVICE_H
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/* wsrep-lib */
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#include "wsrep/server_service.hpp"
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#include "wsrep/exception.hpp" // not_impemented_error(), remove when finished
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#include "wsrep/storage_service.hpp"
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class Wsrep_server_state;
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/* wsrep::server_service interface implementation */
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class Wsrep_server_service : public wsrep::server_service
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{
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public:
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Wsrep_server_service(Wsrep_server_state& server_state)
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: m_server_state(server_state)
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{ }
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wsrep::storage_service* storage_service(wsrep::client_service&);
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wsrep::storage_service* storage_service(wsrep::high_priority_service&);
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void release_storage_service(wsrep::storage_service*);
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wsrep::high_priority_service*
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streaming_applier_service(wsrep::client_service&);
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wsrep::high_priority_service*
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streaming_applier_service(wsrep::high_priority_service&);
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void release_high_priority_service(wsrep::high_priority_service*);
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void background_rollback(wsrep::client_state&);
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void bootstrap();
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void log_message(enum wsrep::log::level, const char*);
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void log_dummy_write_set(wsrep::client_state&, const wsrep::ws_meta&)
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{ throw wsrep::not_implemented_error(); }
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void log_view(wsrep::high_priority_service*, const wsrep::view&);
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void recover_streaming_appliers(wsrep::client_service&);
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void recover_streaming_appliers(wsrep::high_priority_service&);
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wsrep::view get_view(wsrep::client_service&, const wsrep::id& own_id);
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wsrep::gtid get_position(wsrep::client_service&);
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void log_state_change(enum wsrep::server_state::state,
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enum wsrep::server_state::state);
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bool sst_before_init() const;
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std::string sst_request();
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int start_sst(const std::string&, const wsrep::gtid&, bool);
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int wait_committing_transactions(int);
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void debug_sync(const char*);
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private:
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Wsrep_server_state& m_server_state;
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};
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/**
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Helper method to create new streaming applier.
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@param orig_thd Original thd context to copy operation context from.
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@param ctx Context string for debug logging.
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*/
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class Wsrep_applier_service;
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Wsrep_applier_service*
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wsrep_create_streaming_applier(THD *orig_thd, const char *ctx);
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#endif /* WSREP_SERVER_SERVICE */
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