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<DIV><FONT size=2>Hello all,</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2> I think I finally found the problem, it
maybe because that the mySQL wait_timeout variable is set to 100 miliseconds.
Since I cannot update the mySQL server's variable on hosting service. I
just add to the connection URL
jdbc:mysql://localhost:3306/test_cms?autoReconnect=true. That's
all.</FONT></DIV>
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<DIV><FONT size=2> Thanks to all.</FONT></DIV>
<DIV><FONT size=2></FONT> </DIV>
<DIV><FONT size=2>Steven Ho.</FONT></DIV></BODY></HTML>