MySql server non-responsive, JDBC Client unable to establish connection

We found this prefix in 35 webpages.
MapChildren (4)Typical messages (27)TraceDetailed Map
  1. java.sql.SQLException
    1.   at com.mysql.jdbc.Connection.createNewIO()
    2.   at com.mysql.jdbc.Connection.<init>()
  1. SQLException

    NonRegisteringDriver.connect()
    Crashes:34
    Projects:0
    Web Pages:28
    Error Reports:0
    First:10 months ago
    Last:7 months ago
    preview
  2. SQLException

    Driver.connect()
    Crashes:6
    Projects:0
    Web Pages:5
    Error Reports:0
    First:10 months ago
    Last:7 months ago
    preview
  3. java.sql.sqlexceptiontion!!! help!!! urgent!!!!

    First:14 years ago
    Last:2 years ago
    Author:843854
  4. GitHub iconGitHub comment 312#387190592

    First:15 years ago
    Last:2 months ago
    Author:joaonadaisfeup
MessageNumber of crashes
Unable to connect to any hosts due to exception: java.net.ConnectException: Connection refused: connect3
Unable to connect to any hosts due to exception: java.security.AccessControlException: access denied (java.util.PropertyPermission file.encoding read)3
Unable to connect to any hosts due to exception: java.net.ConnectException: Connection refused2
<No message>2
Server connection failure during transaction. Attemtped reconnect 3 times. Giving up.2
java.sql.SQLException: Server connection failure during transaction. Due to underlying exception: 'java.sql.S QLException: General error, message from server: "Unknown database 'xplanner'"' . \[java\] Attempted reconnect 3 times. Giving up.2
java.sql.SQLException: Unable to connect to any hosts due to exception: java.net.SocketException: Invalid argument or cannot assign requested address1
Unable to connect to any hosts due to exception: java.net .ConnectException: Connection refused: connect1
Server connection failure during transaction. Attempted reconnect 3 times. Giving up.1
java.sql.SQLException: Server connection failure during transaction. Due to underlying exception: 'java.sql.S QLException: Invalid authorization specification, message from server: "Access denied for user 'nobody'@'192.168.0.100' (using password: YES)"'.1
  1. java.sql.SQLException
    1.   at com.mysql.jdbc.Connection.createNewIO()
    2.   at com.mysql.jdbc.Connection.<init>()