Troubleshooting of MySQL errors
Troubleshooting of MySQL errors
command not found: mysqldump
- locate the mysqldump command
- sudo find / -iname mysqldump for Mac or Linux
- If you installed
- XAMPP for Mac : Entire path is /Applications/XAMPP/xamppfiles/bin/mysqldump
- XAMPP on X disk for Win : Entire path is X:\xampp\mysql\bin\mysqldump.exe
- MAMP & MAMP PRO for Mac : Entire path is /Applications/MAMP/Library/bin/mysqldump
- input the complete path of mysqldump command
- old command which caused error mysqldump -h 127.0.0.1 -u root -p --force --single-transaction DATABASE_NAME | pv | gzip -c > DATABASE_NAME.sql.gz
- new command /Applications/XAMPP/xamppfiles/bin/mysqldump -h 127.0.0.1 -u root -p --force --single-transaction DATABASE_NAME | pv | gzip -c > DATABASE_NAME.sql.gz
could not access the mysql log
Version: XAMPP 5.6.15-1 on Mac
Cause:
- the error log only be accessed by the mysql user
Solution [1]:
find the path to the mysql log $ ls /Applications/XAMPP/xamppfiles/var/mysql/*.local.err find the file name of mysql log ex: XXXMacBook-Pro.local.err set the permission of log $ sudo chmod 774 /Applications/XAMPP/xamppfiles/var/mysql/XXXMacBook-Pro.local.err
could not open single-table tablespace file filename.ibd
Version: XAMPP 5.6.15-1 on Mac
Condition: The Mac was shutdown accidentally and the database was not shutdown normally. After reboot the Mac, unable to start the MySQL service[2][3].
Possible solution:
- Edit the MySQL configuration file located: /Applications/XAMPP/xamppfiles/etc/my.cnf
- Add this line: innodb_force_recovery = 1
- Try to start the MySQL service
- If the MySQL service started successfully, edit the MySQL configuration file and mark this line : #innodb_force_recovery = 1
- Restart the MySQL service
Caught exception: SQLSTATE[HY093]: Invalid parameter number: parameter was not defined
Solutions
- Number of question marks is not matched with the number of query values [4]
- The array of query values should not be the associative array. Use sequential array!
ERROR 1005 (HY000) at line xx: Can't create table 'TABLE_NAME' (errno: 28)
Solutions
- Check if the disk space where mysql data folder located is enough. e.g. Input df -h on Linux
- More on mysql - ERROR 1005 (HY000): Can't create table (errno: 150) - Stack Overflow.
ERROR 1006 (HY000): Can't create database 'DATABASE_NAME' (errno: 28)
Solutions
- Check if the disk space where mysql data folder located is enough. e.g. Input df -h on Linux
- More on ERROR 1006 (HY000) Can't create database (errno: 13) MySQL 5.6.12 - Stack Overflow.
ERROR 1017 - Can't find file: '.\DATABASE\TABLE.frm' (errno: 22 - Invalid argument)
Message: [Err] 1017 - Can't find file: '.\DATABASE\TABLE.frm' (errno: 22 - Invalid argument)
Solutions
- Check the existence of file DATABASE\TABLE.frm. If not, you may need to create the TABLE before executed the MySQL query.
- Check the permission of file DATABASE\TABLE.frm or folder which the file located[5][6]. unverified
ERROR 1044 (42000): Access denied for user 'USER'@'localhost' to database 'DATABASE_NAME'
Message:
pv file.sql.gz | gunzip | mysql -u USER -p --host=127.0.0.1 --default_character_set utf8 DATABASE_NAME ERROR 1044 (42000): Access denied for user 'USER'@'localhost' to database 'DATABASE_NAME'
Solution:
- Check the permission of specified user name & database name
$ mysql -u USER -p --host=127.0.0.1 Enter password: mysql> use DATABASE_NAME
ERROR 1045 (28000): Access denied for user 'user'@'localhost' (using password: YES)
Solution:
- Check the typo of user name.
- Check the typo of password.
- If you are using the console command, escape the password if it contains special characters e.g. mysql -u root -p'PASSWORD'[7]
- You may need to delete the existing account setting and re-config again.
ERROR 1054 - Unknown column in 'where clause'
Message: [Err] 1054 - Unknown column 'xxx' in 'where clause'
Solution:
- check the column name 'xxx' if exists
- if the column name 'xxx' was computed by the User-Defined Variables. Enclosed the whole query into another parent derived query.
-- The query which met the error message: [Err] 1054 - Unknown column 'rank' in 'where clause' SELECT semi.*, IF(semi.id = semi.prev, @rank := @rank +1, @rank := 1 ) AS `rank` FROM ( ... ) semi WHERE semi.rank <= 10
Enclosed the whole query into another parent derived query.
SELECT final.* FROM ( SELECT semi.*, IF(semi.id = semi.prev, @rank := @rank +1, @rank := 1 ) AS `rank` FROM ( ... ) semi ) final WHERE final.rank <= 10
ERROR 1690 - BIGINT UNSIGNED value is out of range
Message: MySQL error #1690 (BIGINT UNSIGNED value is out of range)
SET sql_mode = 'NO_UNSIGNED_SUBTRACTION';
ERROR 1114 (HY000): The table `TABLE_NAME` is full
Possible solution
- Because the partition is full or almost full, free some hard-disk space[10].
ERROR 1205: Lock wait timeout exceeded; try restarting transaction
Solution: [11]
ERROR 1206: The total number of locks exceeds the lock table size
Message: Error Code: 1206. The total number of locks exceeds the lock table size
Solution: Increase innodb_buffer_pool_size e.g. innodb - How to change value for innodb_buffer_pool_size in MySQL on Mac OS? - Stack Overflow.
ERROR 1827 (HY000): The password hash doesn't have the expected format. Check if the correct password algorithm is being used with the PASSWORD() function.
Wrong sql query as follows:
CREATE USER 'test'@'localhost' IDENTIFIED BY PASSWORD 'my_password';
Solution: (1) Check if the account was created or not
SELECT User,Host FROM mysql.user;
(2a) If the account was created, set the password for the account.
SET PASSWORD FOR 'test'@'localhost' = PASSWORD('my_password');
(2b) If the account was NOT created, re-create the account.
CREATE USER 'test'@'localhost' IDENTIFIED BY 'my_password';
references
- MySQL :: MySQL 5.7 Reference Manual :: 14.7.1.2 CREATE USER Syntax
- MySQL :: MySQL 5.7 Reference Manual :: 14.7.1.7 SET PASSWORD Syntax
- MySQL :: MySQL 5.7 Reference Manual :: 14.7.1.3 DROP USER Syntax
ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysql.sock'
Condition on Cygwin terminal of Windows:
$ mysql -u root -p Enter password: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysql.sock' (2) $ mysql -h localhost -u root -p Enter password: ERROR 2002 (HY000): Can't connect to local MySQL server through socket '/var/run/mysql.sock' (2)
Solution:
- Change -h localhost to -h 127.0.0.1
$ mysql -h 127.0.0.1 -u root -p
ERROR 2003 (HY000): Can't connect to MySQL server on '127.0.0.1' (111 "Connection refused")
Solution:
- Check if the MySQL service is running or not[15]. If not, start the MySQL service.
ERROR 2003 (HY000): Can't connect to MySQL server on 'IP' (116 "Connection timed out")
Solution:
- Check the permission of MySQL database user.
- Check the firewall rules. More on Install MySQL on CentOS 7 | ProfitBricks DevOps Central
- Check if your IP address was included in the allowed IP address list of firewall rules.
- Check if your IP address was changed by using What Is My IP Address? services.
- (optional) Monitor the firewall activity. More on How to Track Firewall Activity with the Windows Firewall Log on Win
References:
ERROR 2013: Lost connection to MySQL server during query
Message: Error Code: 2013. Lost connection to MySQL server during query
Condition: After executed the following query contains number of rows which exceed 1,000,000 rows, I met the error message 'Error Code: 2013. Lost connection to MySQL server during query'.
INSERT IGNORE INTO `target`.`table` SELECT * FROM `source`.`table`;
Solution:
- Increase the settings of (1) DBMS connection keep-alive interval (in seconds) & (2) DBMS connection read time out (in seconds) on MySQL Workbench [16][17]. And remember to restart the MySQL Workbench after the settings were modified. e.g. The default setting of DBMS connection read time out (in seconds) is 30 seconds, you may increase to 6000 seconds (100 minutes).
- Reduce the number of rows to reduce the execution time (1) by using LIMIT clause (2) or by splitting the query size e.g. MOD(column, 2) = 0 & MOD(column, 2) > 0 if the column is numeric.
INSERT IGNORE INTO `target`.`table` SELECT * FROM `source`.`table` LIMIT 0, 10000;
error message:
[Msg] [Exp] Export to - test.xlsx [Err] [Row1048576] [Exp] OLE error 800A03EC [Err] [Row1048577] [Exp] OLE error 800A03EC [Err] [Row1048578] [Exp] OLE error 800A03EC [Err] [Row1048579] [Exp] OLE error 800A03EC
cause:
- Rows count of results exceed the limit of Microsoft Excel Worksheet size: 1,048,576 rows
solution:
- LIMIT the rows of MySQL query
resolve insufficient hard disk space where mysql data located
references
- ↑ Using the CHMOD command effectively @ Computer Plumber
- ↑ mysql - Error: could not open single-table tablespace file .\scrapers\records.ibd - Stack Overflow
- ↑ MySQL Won't Start - InnoDB Corruption and Recovery. - Chepri
- ↑ php Invalid parameter number: parameter was not defined - Stack Overflow
- ↑ MySQL, copying tables files gives rise to "ERROR 1017 (HY000): Can't find file:" even though its there there - Stack Overflow
- ↑ ERROR 1017 (HY000): Can't find file - Percona Community
- ↑ escape characters - Escaping a password using mysqldump console - Super User
- ↑ MySQL :: MySQL 8.0 Reference Manual :: 11.2.6 Out-of-Range and Overflow Handling
- ↑ MySQL error #1690 (BIGINT UNSIGNED value is out of range) for UNIX_TIMESTAMP() - Stack Overflow
- ↑ mysql - ERROR 1114 (HY000): The table is full - Stack Overflow
- ↑ mysql - Getting "Lock wait timeout exceeded; try restarting transaction" even though I'm not using a transaction - Stack Overflow
- ↑ MySQL :: MySQL 5.7 Reference Manual :: 13.7.5.24 SHOW OPEN TABLES Syntax
- ↑ MySQL :: MySQL 5.7 Reference Manual :: 13.7.5.29 SHOW PROCESSLIST Syntax
- ↑ MySQL :: MySQL 5.7 Reference Manual :: 13.7.6.4 KILL Syntax
- ↑ HowTo: Find out If MySQL Is Running On Linux Or Not
- ↑ How can I execute SQL queries that take longer 99,999 seconds on MySQL Workbench? - Stack Overflow
- ↑ Error Code: 2013. Lost connection to MySQL server during query - Stack Overflow
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