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java.lang.IllegalArgumentException: is parameter must not be null	at javax.xml.bind.helpers.AbstractUnmarshallerImpl.unmarshal(AbstractUnmarshallerImpl.java:200)	at uk.ac.ebi.mydas.configuration.ConfigurationManager.unmarshal(ConfigurationManager.java:41)	at uk.ac.ebi.mydas.controller.DataSourceManager.loadConfiguration(DataSourceManager.java:80)	at uk.ac.ebi.mydas.controller.DataSourceManager.init(DataSourceManager.java:62)	at uk.ac.ebi.mydas.controller.MydasServlet.init(MydasServlet.java:214)	at javax.servlet.GenericServlet.init(GenericServlet.java:158)	at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1238)	at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1041)	at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4996)	at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5285)	at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)	at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:725)	at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:701)	at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:717)	at org.apache.catalina.startup.HostConfig.manageApp(HostConfig.java:1696)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)	at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)	at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:484)	at org.apache.catalina.mbeans.MBeanFactory.createStandardContext(MBeanFactory.java:433)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at org.apache.tomcat.util.modeler.BaseModelMBean.invoke(BaseModelMBean.java:300)	at com.sun.jmx.interceptor.DefaultMBeanServerInterceptor.invoke(DefaultMBeanServerInterceptor.java:819)	at com.sun.jmx.mbeanserver.JmxMBeanServer.invoke(JmxMBeanServer.java:801)	at javax.management.remote.rmi.RMIConnectionImpl.doOperation(RMIConnectionImpl.java:1468)	at javax.management.remote.rmi.RMIConnectionImpl.access$300(RMIConnectionImpl.java:76)	at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(RMIConnectionImpl.java:1309)	at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(RMIConnectionImpl.java:1401)	at javax.management.remote.rmi.RMIConnectionImpl.invoke(RMIConnectionImpl.java:829)	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)	at java.lang.reflect.Method.invoke(Method.java:498)	at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:324)	at sun.rmi.transport.Transport$1.run(Transport.java:200)	at sun.rmi.transport.Transport$1.run(Transport.java:197)	at java.security.AccessController.doPrivileged(Native Method)	at sun.rmi.transport.Transport.serviceCall(Transport.java:196)	at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568)	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826)	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683)	at java.security.AccessController.doPrivileged(Native Method)	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682)	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)	at java.lang.Thread.run(Thread.java:745)