In case a plugin is loaded with INSTALL SONAME , and the same plug is configured to be loaded at the configuration with plugin-load-add, there are not clear ERROR and WARNING mesages at the error log file.
example:
150302 14:00:14 [ERROR] Function 'TokuDB' already exists
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150302 14:00:14 [Warning] Couldn't load plugin named 'TokuDB' with soname 'ha_tokudb.so'.
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150302 14:00:14 [ERROR] Function 'TokuDB_trx' already exists
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150302 14:00:14 [Warning] Couldn't load plugin named 'TokuDB_trx' with soname 'ha_tokudb.so'.
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150302 14:00:14 [ERROR] Function 'TokuDB_lock_waits' already exists
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150302 14:00:14 [Warning] Couldn't load plugin named 'TokuDB_lock_waits' with soname 'ha_tokudb.so'.
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150302 14:00:14 [ERROR] Function 'TokuDB_locks' already exists
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150302 14:00:14 [Warning] Couldn't load plugin named 'TokuDB_locks' with soname 'ha_tokudb.so'.
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150302 14:00:14 [ERROR] Function 'TokuDB_file_map' already exists
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150302 14:00:14 [Warning] Couldn't load plugin named 'TokuDB_file_map' with soname 'ha_tokudb.so'.
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150302 14:00:14 [ERROR] Function 'TokuDB_fractal_tree_info' already exists
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150302 14:00:14 [Warning] Couldn't load plugin named 'TokuDB_fractal_tree_info' with soname 'ha_tokudb.so'.
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150302 14:00:14 [ERROR] Function 'TokuDB_fractal_tree_block_map' already exists
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150302 14:00:14 [Warning] Couldn't load plugin named 'TokuDB_fractal_tree_block_map' with soname 'ha_tokudb.so'.
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The messages should give the the reason for the errors
Also, the Warnings are misleading, as in fact the TokuDB plugin is loaded properly
example:
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150302 14:00:14 [Warning] Couldn't load plugin named 'TokuDB' with soname 'ha_tokudb.so'.
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mysql root@centos-6-5-tckt-8873:[Mon Mar 2 14:17:42 2015][(none)]> pager grep -i tokudb
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PAGER set to 'grep -i tokudb'
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mysql root@centos-6-5-tckt-8873:[Mon Mar 2 14:17:47 2015][(none)]> show plugins ;
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| TokuDB | ACTIVE | STORAGE ENGINE | ha_tokudb.so | GPL |
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| TokuDB_trx | ACTIVE | INFORMATION SCHEMA | ha_tokudb.so | GPL |
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| TokuDB_lock_waits | ACTIVE | INFORMATION SCHEMA | ha_tokudb.so | GPL |
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| TokuDB_locks | ACTIVE | INFORMATION SCHEMA | ha_tokudb.so | GPL |
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| TokuDB_file_map | ACTIVE | INFORMATION SCHEMA | ha_tokudb.so | GPL |
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| TokuDB_fractal_tree_info | ACTIVE | INFORMATION SCHEMA | ha_tokudb.so | GPL |
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| TokuDB_fractal_tree_block_map | ACTIVE | INFORMATION SCHEMA | ha_tokudb.so | GPL |
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54 rows in set (0.00 sec)
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There should be a documentation change with explanation what will happen in this case at some MariaDB KnowledgeBase pages , so far I can list these ones:
https://mariadb.com/kb/en/mariadb/install-plugin/
https://mariadb.com/kb/en/mariadb/plugin-overview/
https://mariadb.com/kb/en/mariadb/enabling-tokudb/
Bug
Major
