What do these logs mean

All -

Have a perfectly working openfire setup with around 350 users. Recently see the following error logs, can’t seem to understand what they mean as there are no issues with the chat functionality -

Last packet sent to the server was 1 ms ago.

at com.mysql.jdbc.Connection.createNewIO(Connection.java:2847)

at com.mysql.jdbc.Connection.(Connection.java:1555)

at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:285)

at java.sql.DriverManager.getConnection(DriverManager.java:620)

at java.sql.DriverManager.getConnection(DriverManager.java:222)

at org.jivesoftware.openfire.auth.JDBCAuthProvider.getConnection(JDBCAuthProvider. java:264)

at org.jivesoftware.openfire.auth.JDBCAuthProvider.getPasswordValue(JDBCAuthProvid er.java:292)

at org.jivesoftware.openfire.auth.JDBCAuthProvider.getPassword(JDBCAuthProvider.ja va:244)

at org.jivesoftware.openfire.auth.AuthFactory.getPassword(AuthFactory.java:156)

at org.jivesoftware.openfire.net.XMPPCallbackHandler.handle(XMPPCallbackHandler.ja va:85)

at com.sun.security.sasl.digest.DigestMD5Server.validateClientResponse(DigestMD5Se rver.java:585)

at com.sun.security.sasl.digest.DigestMD5Server.evaluateResponse(DigestMD5Server.j ava:244)

at org.jivesoftware.openfire.net.SASLAuthentication.handle(SASLAuthentication.java :320)

at org.jivesoftware.openfire.SessionPacketRouter.route(SessionPacketRouter.java:66 )

at org.jivesoftware.openfire.http.HttpSession.sendPendingPackets(HttpSession.java: 636)

at org.jivesoftware.openfire.http.HttpSessionManager$HttpPacketSender.run(HttpSess ionManager.java:390)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1110)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:603)

at java.lang.Thread.run(Thread.java:636)

Any ideas?

Thanks,

Himanshu