com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.

mysql.com | 4 months ago
  1. 0

    MySQL Bugs: #35353: getConnection: Communications link failure

    mysql.com | 4 months ago
    com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.
  2. 0

    Java JDBC - Communications link failure

    Stack Overflow | 3 months ago | hassanyf
    com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.
  3. 0

    BungeePermsBukkit trying to use database when it doesn't exist?

    GitHub | 3 years ago | pythros
    com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.
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  5. 0

    Not Working

    GitHub | 3 years ago | JvS15NL
    com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Could not create connection to database server. Attempted reconnect 3 times. Giving up.
  6. 0

    Way too many open SQL connections

    GitHub | 3 years ago | HammerHedd
    com.mysql.jdbc.exceptions.jdbc4.MySQLNonTransientConnectionException: Data source rejected establishment of connection, message from server: "Too many connections" 2013-09-12 13:06:03 [SEVERE] at sun.reflect.GeneratedConstructorAccessor107.newInstance(Unknown Source) 2013-09-12 13:06:03 [SEVERE] at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(Unknown Source) 2013-09-12 13:06:03 [SEVERE] at java.lang.reflect.Constructor.newInstance(Unknown Source) 2013-09-12 13:06:03 [SEVERE] at com.mysql.jdbc.Util.handleNewInstance(Util.java:407) 2013-09-12 13:06:03 [SEVERE] at com.mysql.jdbc.Util.getInstance(Util.java:382) 2013-09-12 13:06:03 [SEVERE] at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1013) 2013-09-12 13:06:03 [SEVERE] at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:987) 2013-09-12 13:06:03 [SEVERE] at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:982)

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Root Cause Analysis

  1. java.io.EOFException

    Can not read response from server. Expected to read 4 bytes, read 0 bytes before connection was unexpectedly lost.

    at com.mysql.jdbc.MysqlIO.readFully()
  2. MySQL jdbc
    JDBC4Connection.<init>
    1. com.mysql.jdbc.MysqlIO.readFully(MysqlIO.java:2431)
    2. com.mysql.jdbc.MysqlIO.readPacket(MysqlIO.java:590)
    3. com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1069)
    4. com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2181)
    5. com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)
    6. com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
    6 frames
  3. Java RT
    Constructor.newInstance
    1. sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    2. sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
    3. sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
    4. java.lang.reflect.Constructor.newInstance(Constructor.java:513)
    4 frames
  4. MySQL jdbc
    NonRegisteringDriver.connect
    1. com.mysql.jdbc.Util.handleNewInstance(Util.java:406)
    2. com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:302)
    3. com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:282)
    3 frames
  5. Java RT
    DriverManager.getConnection
    1. java.sql.DriverManager.getConnection(DriverManager.java:582)
    2. java.sql.DriverManager.getConnection(DriverManager.java:185)
    2 frames
  6. Unknown
    TestMySQLConnection.main
    1. TestMySQLConnection.main(TestMySQLConnection.java:6)
    1 frame