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POMySQL : Permanently getting " Waiting for table metadata lock"
 

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    <p>My MySQL database serves three webapps as the storage backend. However I recently encounter permanantly the error "Waiting for table metadata lock". It happen nearly all the time and I do not understand why.</p> <pre><code>mysql&gt; show processlist -&gt; ; +------+-----------+-----------------+------------+---------+------+---------------------------------+------------------------------------------------------------------------------------------------------+ | Id | User | Host | db | Command | Time | State | Info | +------+-----------+-----------------+------------+---------+------+---------------------------------+------------------------------------------------------------------------------------------------------+ | 36 | root | localhost:33444 | bookmaker2 | Sleep | 139 | | NULL | | 37 | root | localhost:33445 | bookmaker2 | Sleep | 139 | | NULL | | 38 | root | localhost:33446 | bookmaker2 | Sleep | 139 | | NULL | | 39 | root | localhost:33447 | bookmaker2 | Sleep | 49 | | NULL | | 40 | root | localhost:33448 | bookmaker2 | Sleep | 139 | | NULL | | 1315 | bookmaker | localhost:34869 | bookmaker | Sleep | 58 | | NULL | | 1316 | root | localhost:34874 | bookmaker3 | Sleep | 56 | | NULL | | 1395 | bookmaker | localhost:34953 | bookmaker | Sleep | 58 | | NULL | | 1396 | root | localhost:34954 | bookmaker3 | Sleep | 46 | | NULL | | 1398 | root | localhost:34956 | bookmaker3 | Query | 28 | Waiting for table metadata lock | CREATE TABLE IF NOT EXISTS LogEntries ( lid INT NOT NULL AUTO_INCREMEN | | 1399 | root | localhost | NULL | Query | 0 | NULL | show processlist | +------+-----------+-----------------+------------+---------+------+---------------------------------+------------------------------------------------------------------------------------------------------+ </code></pre> <p>Of course one can kill the corresponding process. However if I restart my program that tries to create the table structure of my database "bookmaker3" the newly created process ends up again in a metalock.</p> <p>I even cannot drop the database:</p> <pre><code>mysql&gt; drop database bookmaker3; </code></pre> <p>This yields also a metalock.</p> <p>How can this be repaired?</p>
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