com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

Google Groups | Harivardhan Pyaram | 2 years ago
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  1. 0

    Error connecting to the database.Communications link failure

    Google Groups | 2 years ago | Harivardhan Pyaram
    com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
  2. 0

    Error connecting to the database.Communications link failure

    Google Groups | 2 years ago | Harivardhan Pyaram
    com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
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    Ruby Rack Torqbox & Ruby Rack Trinidad - Verification Failed

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    com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
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    Spring Boot - Publication 1482: Build result summary - Spring CI

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    com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.
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    GitHub comment 15#215656439

    GitHub | 1 year ago | feibabeibei
    com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure The last packet sent successfully to the server was 0 milliseconds ago. The driver has not received any packets from the server.

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Root Cause Analysis

  1. java.net.ConnectException

    Connection refused

    at java.net.PlainSocketImpl.socketConnect()
  2. Java RT
    Socket.<init>
    1. java.net.PlainSocketImpl.socketConnect(Native Method)
    2. java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:339)
    3. java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:200)
    4. java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:182)
    5. java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
    6. java.net.Socket.connect(Socket.java:579)
    7. java.net.Socket.connect(Socket.java:528)
    8. java.net.Socket.<init>(Socket.java:425)
    9. java.net.Socket.<init>(Socket.java:241)
    9 frames
  3. MySQL jdbc
    JDBC4Connection.<init>
    1. com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:258)
    2. com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:306)
    3. com.mysql.jdbc.ConnectionImpl.coreConnect(ConnectionImpl.java:2504)
    4. com.mysql.jdbc.ConnectionImpl.connectOneTryOnly(ConnectionImpl.java:2541)
    5. com.mysql.jdbc.ConnectionImpl.createNewIO(ConnectionImpl.java:2323)
    6. com.mysql.jdbc.ConnectionImpl.<init>(ConnectionImpl.java:832)
    7. com.mysql.jdbc.JDBC4Connection.<init>(JDBC4Connection.java:46)
    7 frames
  4. Java RT
    Constructor.newInstance
    1. sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
    2. sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
    3. sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
    4. java.lang.reflect.Constructor.newInstance(Constructor.java:526)
    4 frames
  5. MySQL jdbc
    NonRegisteringDriver.connect
    1. com.mysql.jdbc.Util.handleNewInstance(Util.java:408)
    2. com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:417)
    3. com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:344)
    3 frames
  6. com.dbsolo.a
    u.ĉ
    1. com.dbsolo.a.u.w(Unknown Source)
    2. com.dbsolo.a.u.ĉ(Unknown Source)
    2 frames
  7. com.dbsolo.P
    A.D
    1. com.dbsolo.P.k.A(Unknown Source)
    2. com.dbsolo.P.k.A(Unknown Source)
    3. com.dbsolo.P.E.A.D(Unknown Source)
    3 frames
  8. com.dbsolo.ui
    MainApp.main
    1. com.dbsolo.ui.MainApp.main(Unknown Source)
    1 frame
  9. Java RT
    Method.invoke
    1. sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    2. sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    3. sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    4. java.lang.reflect.Method.invoke(Method.java:606)
    4 frames
  10. com.exe4j.runtime
    LauncherEngine.launch
    1. com.exe4j.runtime.LauncherEngine.launch(Unknown Source)
    1 frame
  11. com.install4j.runtime
    Launcher.main
    1. com.install4j.runtime.launcher.Launcher.main(Unknown Source)
    1 frame