java.sql.SQLException: Access denied for user ''@'localhost' (using password: NO )

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    java.sql.SQLException: Access denied for user ''@'localhost' (using password: NO )
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    java.sql.SQLException: Access denied for user ''@'localhost' (using password: NO)

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Root Cause Analysis

  1. java.sql.SQLException

    Access denied for user ''@'localhost' (using password: NO )

    at com.mysql.jdbc.SQLError.createSQLException()
  2. MySQL jdbc
    JDBC4Connection.<init>
    1. com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1055)
    2. com.mysql.jdbc.SQLError.createSQLException(SQLError.java:956)
    3. com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3491)
    4. com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3423)
    5. com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:910)
    6. com.mysql.jdbc.MysqlIO.secureAuth411(MysqlIO.java:3923)
    7. com.mysql.jdbc.MysqlIO.doHandshake(MysqlIO.java:1273)
    8. com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2031)
    9. com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:718)
    10. com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
    10 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:207)
    2 frames