Why Am I Getting "com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications Link Failure" in Mybatis and Spring?

"com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure Software caused connection abort: recv failed [duplicate]"

Problem:

While updating a record in MySQL using Mybatis and Spring, an exception is encountered indicating a communication link failure caused by socket read errors:

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link failure

The last packet successfully received from the server was 18,940 milliseconds ago.  The last packet sent successfully to the server was 18,918 milliseconds ago.

Cause:

The MySQL connections are timing out before the connection pool recognizes them.

Solution:

To resolve this issue, several approaches can be taken:

1. Increase Timeout Value in MySQL Config File (my.ini):

   Increase the wait_timeout parameter in the MySQL configuration file (my.ini) to extend the allowed idle time for connections.

2. Reduce Idle Time in Connection Pool:

   Configure the connection pool to discard connections before MySQL closes them. This can be achieved by setting a lower value for the minIdle and maxIdle time parameters.

3. Add Validate Connection Query:

   Add a validation query to the connection pool configuration. This query ensures that the pool tests each connection before issuing it. However, this approach may introduce performance overhead.

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