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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 GitHub by checkium
, 1 year ago
Failed to initialize pool: Access denied for user 'joaopere37625'@'5.135.9.125' (using password: YES)
via GitHub by patric-r
, 1 year ago
Failed to initialize pool: IO Error: Socket read timed out
via GitHub by yurique
, 9 months ago
Failed to initialize pool: Connection Error: java.lang.NoSuchMethodError: io.netty.channel.DefaultChannelId.newInstance()Lio/netty/channel/DefaultChannelId;
via GitHub by gregko
, 5 months ago
Failed to initialize pool: General error: "java.lang.VerifyError: org.h2.mvstore.db.TransactionStore$TransactionMap" [50000-193]
via Stack Overflow by user6123723
, 1 year ago
Failed to initialize pool: null
via Google Groups by KajMagnus, 1 year ago
Failed to initialize pool: Cannot rollback when autoCommit is enabled.
com.zaxxer.hikari.pool.HikariPool$PoolInitializationException: Failed to initialize pool: Access denied for user 'joaopere37625'@'5.135.9.125' (using password: YES) at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:528) at com.zaxxer.hikari.pool.HikariPool.<init>(HikariPool.java:118) at com.zaxxer.hikari.HikariDataSource.<init>(HikariDataSource.java:71) at com.github.games647.fastlogin.core.Storage.<init>(Storage.java:44) at com.github.games647.fastlogin.core.FastLoginCore.setupDatabase(FastLoginCore.java:52) at com.github.games647.fastlogin.bungee.FastLoginBungee.onEnable(FastLoginBungee.java:60) at net.md_5.bungee.api.plugin.PluginManager.enablePlugins(PluginManager.java:227) at net.md_5.bungee.BungeeCord.start(BungeeCord.java:267) at net.md_5.bungee.BungeeCordLauncher.main(BungeeCordLauncher.java:55) at net.md_5.bungee.Bootstrap.main(Bootstrap.java:15)Caused by: java.sql.SQLException: Access denied for user 'joaopere37625'@'5.135.9.125' (using password: YES) at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:996) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3887) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3823) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:870) at com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:4332) at com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1258) at com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2234) at com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2265) at com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2064) at com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:790) at com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:44) at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) at java.lang.reflect.Constructor.newInstance(Constructor.java:422) at com.mysql.jdbc.Util.handleNewInstance(Util.java:377) at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:395) at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:325) at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:95) at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:101) at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:316) at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:518) ... 9 more