Getting MySQL Error All of Sudden (Caused by java.sql.SQLNonTransientConnectionException)

Summary:

Error message: -

Caused by java.sql.SQLNonTransientConnectionException: No operations allowed after connection closed..

Content (required):

Hi Team,

I'm using MySQL Database Service on OCI and installed OIC Connectivity Agent in the MySQL VM (Compute Instance).

It was working fine until today morning, I'm getting below errors: -

PURE SQL:-

<err:serviceInvocationError

xmlns:err="http://xmlns.oracle.com/cloud/generic/service/fault">

<err:type>Pure SQL Exception</err:type><err:title>Pure SQL

Execute of select count(*) cnt from [table] WHERE

[few conditions].</err:title>

<err:detail>Caused by java.sql.SQLNonTransientConnectionException: No operations allowed after connection closed..</err:detail>

<err:errorCode>serviceInvocationError</err:errorCode>