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d3575ce0e4
in some case.
ER_CON_COUNT_ERROR is defined with SQL state 08004. However, this SQL state is not always
returned.
This error can be thrown in two cases:
1. when an ordinary user (a user w/o SUPER privilege) is connecting,
and the number of active user connections is equal or greater than
max_connections.
2. when a user is connecting and the number of active user connections is
already (max_connections + 1) -- that means that no more connections will
be accepted regardless of the user credentials.
In the 1-st case, SQL state is correct.
The bug happens in the 2-nd case -- on UNIX the client gets 00000 SQL state, which is
absolutely wrong (00000 means "not error SQL state); on Windows
the client accidentally gets HY000 (which means "unknown SQL state).
The cause of the problem is that the server rejects extra connection
prior to read a packet with client capabilities. Thus, the server
does not know if the client supports SQL states or not (if the client
supports 4.1 protocol or not). So, the server supposes the worst and
does not send SQL state at all.
The difference in behavior on UNIX and Windows occurs because on Windows
CLI_MYSQL_REAL_CONNECT() invokes create_shared_memory(), which returns
an error (in default configuration, where shared memory is not configured).
Then, the client does not reset this error, so when the connection is
rejected, SQL state is HY000 (from the error from create_shared_memory()).
The bug appeared after test case for Bug#33507 -- before that, this behavior
just had not been tested.
The fix is to 1) reset the error after create_shared_memory();
2) set SQL state to 'unknown error' if it was not received from
the server.
A separate test case is not required, since the behavior is already
tested in connect.test.
Note for doc-team: the manual should be updated to say that under
some circumstances, 'Too many connections' has HY000 SQL state.
209 lines
5.1 KiB
Text
209 lines
5.1 KiB
Text
drop table if exists t1,t2;
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show tables;
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Tables_in_mysql
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columns_priv
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db
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event
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func
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general_log
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help_category
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help_keyword
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help_relation
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help_topic
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host
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ndb_binlog_index
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plugin
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proc
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procs_priv
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servers
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slow_log
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tables_priv
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time_zone
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time_zone_leap_second
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time_zone_name
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time_zone_transition
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time_zone_transition_type
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user
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show tables;
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Tables_in_test
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connect(localhost,root,z,test2,MASTER_PORT,MASTER_SOCKET);
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ERROR 28000: Access denied for user 'root'@'localhost' (using password: YES)
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connect(localhost,root,z,test,MASTER_PORT,MASTER_SOCKET);
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ERROR 28000: Access denied for user 'root'@'localhost' (using password: YES)
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grant ALL on *.* to test@localhost identified by "gambling";
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grant ALL on *.* to test@127.0.0.1 identified by "gambling";
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show tables;
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Tables_in_mysql
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columns_priv
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db
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event
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func
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general_log
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help_category
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help_keyword
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help_relation
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help_topic
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host
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ndb_binlog_index
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plugin
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proc
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procs_priv
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servers
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slow_log
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tables_priv
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time_zone
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time_zone_leap_second
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time_zone_name
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time_zone_transition
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time_zone_transition_type
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user
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show tables;
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Tables_in_test
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connect(localhost,test,,test2,MASTER_PORT,MASTER_SOCKET);
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ERROR 28000: Access denied for user 'test'@'localhost' (using password: NO)
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connect(localhost,test,,"",MASTER_PORT,MASTER_SOCKET);
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ERROR 28000: Access denied for user 'test'@'localhost' (using password: NO)
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connect(localhost,test,zorro,test2,MASTER_PORT,MASTER_SOCKET);
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ERROR 28000: Access denied for user 'test'@'localhost' (using password: YES)
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connect(localhost,test,zorro,test,MASTER_PORT,MASTER_SOCKET);
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ERROR 28000: Access denied for user 'test'@'localhost' (using password: YES)
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update mysql.user set password=old_password("gambling2") where user=_binary"test";
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flush privileges;
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set password="";
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set password='gambling3';
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ERROR HY000: Password hash should be a 41-digit hexadecimal number
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set password=old_password('gambling3');
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show tables;
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Tables_in_mysql
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columns_priv
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db
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event
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func
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general_log
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help_category
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help_keyword
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help_relation
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help_topic
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host
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ndb_binlog_index
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plugin
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proc
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procs_priv
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servers
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slow_log
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tables_priv
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time_zone
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time_zone_leap_second
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time_zone_name
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time_zone_transition
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time_zone_transition_type
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user
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show tables;
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Tables_in_test
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connect(localhost,test,,test2,MASTER_PORT,MASTER_SOCKET);
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ERROR 28000: Access denied for user 'test'@'localhost' (using password: NO)
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connect(localhost,test,,test,MASTER_PORT,MASTER_SOCKET);
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ERROR 28000: Access denied for user 'test'@'localhost' (using password: NO)
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connect(localhost,test,zorro,test2,MASTER_PORT,MASTER_SOCKET);
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ERROR 28000: Access denied for user 'test'@'localhost' (using password: YES)
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connect(localhost,test,zorro,test,MASTER_PORT,MASTER_SOCKET);
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ERROR 28000: Access denied for user 'test'@'localhost' (using password: YES)
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delete from mysql.user where user=_binary"test";
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flush privileges;
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create table t1 (id integer not null auto_increment primary key);
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create temporary table t2(id integer not null auto_increment primary key);
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set @id := 1;
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delete from t1 where id like @id;
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drop table t1;
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# ------------------------------------------------------------------
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# -- End of 4.1 tests
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# ------------------------------------------------------------------
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# -- Bug#33507: Event scheduler creates more threads than max_connections
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# -- which results in user lockout.
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GRANT USAGE ON *.* TO mysqltest_u1@localhost;
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SET GLOBAL max_connections = 3;
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SET GLOBAL event_scheduler = ON;
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# -- Waiting for old connections to close...
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# -- Disconnecting default connection...
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# -- Check that we allow exactly three user connections, no matter how
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# -- many threads are running.
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# -- Connecting (1)...
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# -- Waiting for root connection to close...
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# -- Connecting (2)...
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# -- Connecting (3)...
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# -- Connecting (4)...
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ERROR 08004: Too many connections
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# -- Waiting for the last connection to close...
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# -- Check that we allow one extra SUPER-user connection.
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# -- Connecting super (1)...
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# -- Connecting super (2)...
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ERROR HY000: Too many connections
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SELECT user FROM information_schema.processlist ORDER BY id;
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user
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event_scheduler
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mysqltest_u1
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mysqltest_u1
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mysqltest_u1
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root
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# -- Resetting variables...
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SET GLOBAL max_connections = 151;
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# -- Stopping Event Scheduler...
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SET GLOBAL event_scheduler = OFF;
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# -- Waiting for Event Scheduler to stop...
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# -- That's it. Closing connections...
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# -- Restoring default connection...
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# -- Waiting for connections to close...
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DROP USER mysqltest_u1@localhost;
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# -- End of Bug#33507.
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# -- Bug#35074: max_used_connections is not correct.
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FLUSH STATUS;
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SHOW STATUS LIKE 'max_used_connections';
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Variable_name Value
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Max_used_connections 1
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# -- Starting Event Scheduler...
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SET GLOBAL event_scheduler = ON;
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# -- Waiting for Event Scheduler to start...
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# -- Opening a new connection to check max_used_connections...
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# -- Check that max_used_connections hasn't changed.
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SHOW STATUS LIKE 'max_used_connections';
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Variable_name Value
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Max_used_connections 2
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# -- Closing new connection...
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# -- Stopping Event Scheduler...
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SET GLOBAL event_scheduler = OFF;
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# -- Waiting for Event Scheduler to stop...
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# -- End of Bug#35074.
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# ------------------------------------------------------------------
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# -- End of 5.1 tests
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# ------------------------------------------------------------------
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