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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 spigotmc.org by Unknown author, 1 year ago
via mysql.com by Unknown author, 1 year ago
via Stack Overflow by M Bta
, 2 years ago
Operation not allowed after ResultSet closed
via mysql.com by Unknown author, 1 year ago
via Stack Overflow by ratnesh
, 2 years ago
Operation not allowed after ResultSet closed
java.sql.SQLException: Operation not allowed after ResultSet closed	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982)	at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:927)	at com.mysql.jdbc.ResultSetImpl.checkClosed(ResultSetImpl.java:794)	at com.mysql.jdbc.ResultSetImpl.next(ResultSetImpl.java:7145)	at com.zaxxer.hikari.pool.HikariProxyResultSet.next(HikariProxyResultSet.java)	at valour.network.core.punishments.mute.UnMute$1.run(UnMute.java:46)	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftTask.run(CraftTask.java:71)	at org.bukkit.craftbukkit.v1_8_R3.scheduler.CraftAsyncTask.run(CraftAsyncTask.java:53)	at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)	at java.lang.Thread.run(Unknown Source)