java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)

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MySQL doesn't support some types of characters (such as emojis) with the utf8 encoding. You need to be on MySQL 5.5+ and force utf8mb4 (everywhere, client and server). You can do this sending the query "SET NAMES utf8mb4". Check this https://goo.gl/3E2qzg

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Make sure you are using InnoDB storage engine and READ-COMMITTED transaction isolation level and increase the database server innodb_lock_wait_timeout variable to about 500.

Solutions on the web

via Google Groups by Daniel Mendez, 1 year ago
Access denied for user 'root'@'localhost' (using password: YES)
via roseindia.net by Unknown author, 1 year ago
Access denied for user 'root'@'localhost' (using password : YES)
via Oracle Community by 574272, 1 year ago
Access denied for user 'USERNAME'@'%' (using password: YES)
via Stack Overflow by user5620472
, 1 year ago
Incorrect string value: '\xD0\xBA\xD1\x83\xD0\xBF...' for column 'description' at row 1
via Stack Overflow by slavig
, 2 years ago
Access denied for user 'root'@'localhost' (using password: YES)
via grokbase.com by Unknown author, 1 year ago
java.sql.SQLException: Access denied for user 'root'@'localhost' (using password: YES)
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073)

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