In general, hitting any sort of submit button repeatedly is a bad idea. Your creation of duplicate nodes was almost certainly due to this action.
Myself and others have also encountered this slowness recently. See "Missing 'in reply to...' And 'in thread....'" and "Pages slow to load" for some of the issues.
— Ken
In reply to Re^8: Trying to connect to DBD::JDBC - com.vizdom.dbd.jdbc.Server
by kcott
in thread Trying to connect to DBD::JDBC - com.vizdom.dbd.jdbc.Server
by mallett76
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