ActiveMQ Artemis JDBC Store: Add connection pool for DB connections? - activemq-artemis

Question

I use the latest version of ActiveMQ Artemis with the MySQL database as message store. After 8h my server times out client db connections. The AbstractJDBCDriver implementation in Artemis does not recognize this and throws an exception.
What to do? I see no possibility for a DB connection pool with this implementation.
at com.mysql.cj.jdbc.exceptions.SQLError.createCommunicationsException(SQLError.java:174) [mysql-connector-java.jar:8.0.19]
at com.mysql.cj.jdbc.exceptions.SQLExceptionsMapping.translateException(SQLExceptionsMapping.java:64) [mysql-connector-java.jar:8.0.19]
at com.mysql.cj.jdbc.ConnectionImpl.setAutoCommit(ConnectionImpl.java:2056) [mysql-connector-java.jar:8.0.19]
at org.apache.activemq.artemis.jdbc.store.drivers.AbstractJDBCDriver.stop(AbstractJDBCDriver.java:108) [artemis-jdbc-store-2.10.0.redhat-00004.jar:2.10.0.redhat-00004]
Same question here.

Answer 1

At this point the best thing to do is to restart the broker when this happens. There currently is no DB connection pool implementation, as you note.

Answer 2

In the latest Artemis release (2.16.0) there is support for connection-pooling.
Basic example with MySQL:
Create a new broker instance:
$ARTEMIS_HOME/bin/artemis create hosts/host0 --name host0 --user admin --password admin --require-login
Start the database and create a dedicated instance:
CREATE DATABASE activemq CHARACTER SET utf8mb4;
CREATE USER 'activemq'#'%' IDENTIFIED WITH mysql_native_password BY 'activemq';
GRANT CREATE,SELECT,INSERT,UPDATE,DELETE,INDEX ON activemq.* TO 'activemq'#'%';
FLUSH PRIVILEGES;
Download and copy the specific JDBC driver:
curl -sL https://dev.mysql.com/get/Downloads/Connector-J/mysql-connector-java-8.0.22.tar.gz -o driver.tar.gz
tar xf driver.tar.gz && cp mysql-connector-java-8.0.22/mysql-connector-java-8.0.22.jar hosts/host0/lib/
Add JDBC storage with connection-pooling configuration:
<store>
<database-store>
<data-source-properties>
<!-- All configuration options: https://commons.apache.org/proper/commons-dbcp/configuration.html -->
<data-source-property key="driverClassName" value="com.mysql.cj.jdbc.Driver" />
<data-source-property key="url" value="jdbc:mysql://localhost:3306/activemq" />
<data-source-property key="username" value="activemq" />
<data-source-property key="password" value="activemq" />
<data-source-property key="poolPreparedStatements" value="true" />
<!-- Avoid MySQL default behavior of killing long lived connections after 1 hour -->
<data-source-property key="maxConnLifetimeMillis" value="1800000" />
</data-source-properties>
<bindings-table-name>BINDINGS</bindings-table-name>
<message-table-name>MESSAGES</message-table-name>
<large-message-table-name>LARGE_MESSAGES</large-message-table-name>
<page-store-table-name>PAGE_STORE</page-store-table-name>
<node-manager-store-table-name>NODE_MANAGER_STORE</node-manager-store-table-name>
</database-store>
</store>