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.

GitHub | kksuthar321 | 2 years ago
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    Stack Overflow | 2 years ago | suthar
    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 1#91546263

    GitHub | 2 years ago | kksuthar321
    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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    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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    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.UnknownHostException

    [host-name]

    at java.net.InetAddress.getAllByName()
  2. Java RT
    InetAddress.getAllByName
    1. java.net.InetAddress.getAllByName(Unknown Source)
    2. java.net.InetAddress.getAllByName(Unknown Source)
    2 frames
  3. MySQL jdbc
    MysqlIO.<init>
    1. com.mysql.jdbc.StandardSocketFactory.connect(StandardSocketFactory.java:250)
    2. com.mysql.jdbc.MysqlIO.<init>(MysqlIO.java:306)
    2 frames