MySQL on Windows - how do I set the wait_timeout for connections using named pipes?

Posted by gustafc on Server Fault See other posts from Server Fault or by gustafc
Published on 2010-05-10T09:11:04Z Indexed on 2010/05/10 9:14 UTC
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mysql

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named-pipes

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timeout

I use a MySQL database running on a Windows box, and for performance reasons I'm connecting to it using named pipes.

The (Java) application using the database (through Hibernate) can let the connection lie idle for quite a long time, which causes the connection to fail with the following message:

com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 33 558 297 milliseconds ago. The last packet sent successfully to the server was 33 558 297 milliseconds ago. is longer than the server configured value of 'wait_timeout'. You should consider either expiring and/or testing connection validity before use in your application, increasing the server configured values for client timeouts, or using the Connector/J connection property 'autoReconnect=true' to avoid this problem.

autoReconnect unfortunately has no effect (and neither does autoReconnectForPools), but the wait_timeout docs state that wait_timeout only applies "to TCP/IP and Unix socket file connections, not to connections made via named pipes, or shared memory".

How can I change the wait_timeout for named pipes?

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