java.lang.NumberFormatException: null

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You try to parse a String that contains non-numeric characters to an int. The string must contain decimal characters only, optionally beginning with a + or - sign.

Solutions on the web

via roller-user by mstralka (sent by Nabble.com), 1 year ago
java.lang.NumberFormatException: null
at java.lang.Integer.parseInt(Integer.java:415)
at java.lang.Integer.parseInt(Integer.java:497)
at org.roller.business.utils.UpgradeDatabase.upgradeDatabase(UpgradeDatabase.java:68)
at org.roller.presentation.RollerContext.upgradeDatabaseIfNeeded(RollerContext.java:304)
at org.roller.presentation.RollerContext.contextInitialized(RollerContext.java:177)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:3692)
at org.apache.catalina.core.StandardContext.start(StandardContext.java:4127)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1012)
at org.apache.catalina.core.StandardHost.start(StandardHost.java:718)
at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1012)
at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:442)
at org.apache.catalina.core.StandardService.start(StandardService.java:450)
at org.apache.catalina.core.StandardServer.start(StandardServer.java:680)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:585)
at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:275)

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