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  1. ,
    Expert tip

    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

  2. ,

    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 mysql.com by Unknown author, 1 year ago
Connection is read-only. Queries leading to data modification are not allowed.
via 2uzhan.com by Unknown author, 1 year ago
Connection is read-only. Queries leading to data modification are not allowed.
via mysql.com by Unknown author, 1 year ago
Connection is read-only. Queries leading to data modification are not allowed.
via Stack Overflow by naga1990
, 2 years ago
via coderanch.com by Unknown author, 1 year ago
via Stack Overflow by Cem Catikkas
, 2 years ago
Cannot convert value '2016-03-30 09:41:03.043' from column 6 to TIMESTAMP.
java.sql.SQLException: Connection is read-only. Queries leading to data modification are not allowed.	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:926)	at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1516)	at com.mysql.jdbc.StatementImpl.executeUpdate(StatementImpl.java:1485)	at com.mysql.jdbc.RowDataDynamic.close(RowDataDynamic.java:195)	at com.mysql.jdbc.ResultSetImpl.realClose(ResultSetImpl.java:7473)	at com.mysql.jdbc.ResultSetImpl.close(ResultSetImpl.java:881)