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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 GitHub by dvohra
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Column 'id' not found.
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Column 'TimeStamp' not found.
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Column 'DiseaseKey_id' not found.
java.sql.SQLException: Column 'emp_reason' not found.	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1078)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:989)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:975)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:920)	at com.mysql.jdbc.ResultSetImpl.findColumn(ResultSetImpl.java:1163)	at com.mysql.jdbc.ResultSetImpl.getString(ResultSetImpl.java:5729)