Troubleshooting of MySQL errors

Troubleshooting of MySQL errors

command not found: mysqldump

1. locate the mysqldump command
   • sudo find / -iname mysqldump for macOS or Linux
   • If you installed
     • XAMPP for macOS : 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 macOS : Entire path is /Applications/MAMP/Library/bin/mysqldump
2. 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 macOS

Cause:

• the error log only be accessed by the mysql user

Solution :

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 macOS

Condition: The Mac was shutdown accidentally and the database was not shutdown normally. After reboot the Mac, unable to start the MySQL service.

Possible solution:

1. Edit the MySQL configuration file located: /Applications/XAMPP/xamppfiles/etc/my.cnf
2. Add this line: innodb_force_recovery = 1
3. Try to start the MySQL service
4. If the MySQL service started successfully, edit the MySQL configuration file and mark this line : #innodb_force_recovery = 1
5. 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
• 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. 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'
• 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:

1. check the column name 'xxx' if exists
2. 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)

Solution :

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.

ERROR 1205: Lock wait timeout exceeded; try restarting transaction

Solution:

1. SHOW OPEN TABLES WHERE in_use > 0;
2. SHOW [FULL] PROCESSLIST;
3. KILL <process id>;

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. 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.

References:

• Connect to a MySQL database remotely

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 . 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;

Navicat error: [Exp] OLE error 800A03EC

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

Err: 解決 MySQL 資料庫所在硬碟空間不足的狀況

references

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