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Test case:
--source include/have_xtradb.inc
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CREATE TABLE t1(a INT) ENGINE=InnoDB;
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SELECT * FROM t1;
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--send SET @@global.table_open_cache=400;
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connect(con1, localhost, root);
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ALTER TABLE t1 COMMENT='abc';
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disconnect con1;
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connection default;
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--reap
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DROP TABLE t1;
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Apply this patch to make it stuck reliably:
diff --git a/sql/table_cache.cc b/sql/table_cache.cc
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index 097f37d..b46a620 100644
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--- a/sql/table_cache.cc
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+++ b/sql/table_cache.cc
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@@ -865,6 +865,8 @@ void tdc_release_share(TABLE_SHARE *share)
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}
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mysql_mutex_unlock(&share->tdc.LOCK_table_share);
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+ if (!strcmp(share->table_name.str, "t1") && !share->tdc.flushed)
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+ sleep(1);
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mysql_mutex_lock(&LOCK_unused_shares);
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mysql_mutex_lock(&share->tdc.LOCK_table_share);
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if (share->tdc.flushed)
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|