Raised exception while starting the application. Fix the error and restart.

Message
For input string: ""
Handler
org.fao.geonet.Geonetwork
Exception
java.lang.NumberFormatException: For input string: ""
Stack
java.lang.NumberFormatException: For input string: ""
	at java.lang.NumberFormatException.forInputString(Unknown Source)
	at java.lang.Integer.parseInt(Unknown Source)
	at java.lang.Integer.valueOf(Unknown Source)
	at org.fao.geonet.Geonetwork.start(Geonetwork.java:377)
	at jeeves.server.JeevesEngine.initAppHandler(JeevesEngine.java:447)
	at jeeves.server.JeevesEngine.init(JeevesEngine.java:190)
	at jeeves.server.sources.http.JeevesServlet.init(JeevesServlet.java:80)
	at javax.servlet.GenericServlet.init(GenericServlet.java:143)
	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1106)
	at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1063)
	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:960)
	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4673)
	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:4980)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:683)
	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:658)
	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:662)
	at org.apache.catalina.startup.HostConfig.deployWAR(HostConfig.java:1023)
	at org.apache.catalina.startup.HostConfig$DeployWar.run(HostConfig.java:1910)
	at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
	at java.util.concurrent.AbstractExecutorService.submit(Unknown Source)
	at org.apache.catalina.startup.HostConfig.deployWARs(HostConfig.java:824)
	at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:474)
	at org.apache.catalina.startup.HostConfig.start(HostConfig.java:1617)
	at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:318)
	at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:123)
	at org.apache.catalina.util.LifecycleBase.setStateInternal(LifecycleBase.java:423)
	at org.apache.catalina.util.LifecycleBase.setState(LifecycleBase.java:366)
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:893)
	at org.apache.catalina.core.StandardHost.startInternal(StandardHost.java:795)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1328)
	at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1318)
	at java.util.concurrent.FutureTask.run(Unknown Source)
	at org.apache.tomcat.util.threads.InlineExecutorService.execute(InlineExecutorService.java:75)
	at java.util.concurrent.AbstractExecutorService.submit(Unknown Source)
	at org.apache.catalina.core.ContainerBase.startInternal(ContainerBase.java:866)
	at org.apache.catalina.core.StandardEngine.startInternal(StandardEngine.java:249)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.StandardService.startInternal(StandardService.java:428)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.core.StandardServer.startInternal(StandardServer.java:922)
	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:183)
	at org.apache.catalina.startup.Catalina.start(Catalina.java:772)
	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 org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:347)
	at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:478)