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java.lang.ArithmeticException: / by zero	at org.opencloudb.backend.PhysicalDBPool.initSource(	at org.opencloudb.backend.PhysicalDBPool.init(	at org.opencloudb.MycatServer.startup(	at org.opencloudb.MycatStartup.main(	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)	at java.lang.reflect.Method.invoke(Unknown Source)	at	at Source)