-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Adam,
AD wrote: > I am trying to troubleshoot an error that seems to occur quite frequently > with no real solution. I constantly see > > com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: Communications link > failure in my application after the app runs for a few days. Communication > is fine, networking is fine, netstat even shows connected sessions. It > appears one of the connection went stale but it is still being returned from > the pool. I did some reading and it appears there are 2 options > > 1 - Set wait_timeout in MySQL very high , but still risky You shouldn't have to do this. > 2 - use something like DBCP to enforce a validation query for the connection > from the pool. If you are using a <Resource> element in your context.xml file, then you are already using a DBCP. Just add the "validationQuery" attribute to your <Resource> element: <Resource ... validationQuery="SELECT 1" /> You can use validationQuery="/* ping */SELECT 1" if you want, and Connector/J will ping the server instead(?) of issuing the SELECT query. - -chris -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.9 (MingW32) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org iEYEARECAAYFAkk0NcIACgkQ9CaO5/Lv0PAFuQCfZNlGCdGrcLnS2xer1UNYQJ1c /JQAnA9vvi6UdTphh3eBv04lC37G8PRL =4Z+h -----END PGP SIGNATURE----- --------------------------------------------------------------------- To start a new topic, e-mail: users@tomcat.apache.org To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
