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java.lang.ExceptionInInitializerError: java.lang.NullPointerException	at java.lang.StringBuffer.(StringBuffer.java:130)	at java.net.URLStreamHandler.toExternalForm(URLStreamHandler.java:366)	at java.net.URL.toExternalForm(URL.java:754)	at java.net.URL.toString(URL.java:741)	at java.lang.String.valueOf(String.java:1947)	at java.lang.StringBuffer.append(StringBuffer.java:370)	at org.apache.log4j.Category.(Category.java:145)	at com.bea.logging.LogManager.configureHierarchy(LogManager.java:122)	at com.bea.logging.LogManager.configure(LogManager.java:94)	at com.bea.adapter.spi.AbstractManagedConnectionFactory.initializeLogResources(AbstractManagedConnectionFactory.java:280)	at com.bea.adapter.spi.AbstractManagedConnectionFactory.isValidState(AbstractManagedConnectionFactory.java:229)	at com.bea.adapter.spi.AbstractManagedConnectionFactory.assertValidState(AbstractManagedConnectionFactory.java:174)	at com.bea.adapter.spi.AbstractManagedConnectionFactory.createConnectionFactory(AbstractManagedConnectionFactory.java:1186)	at weblogic.connector.common.internal.ConnectionPoolManager.createConnectionFactory(ConnectionPoolManager.java:131)	at weblogic.connector.deploy.JNDIHandler.getObjectInstance(JNDIHandler.java:28)	at javax.naming.spi.NamingManager.getObjectInstance(NamingManager.java:304)	at weblogic.jndi.internal.WLNamingManager.getObjectInstance(WLNamingManager.java:110)	at weblogic.jndi.internal.BasicNamingNode.resolveObject(BasicNamingNode.java:707)	at weblogic.jndi.internal.BasicNamingNode.resolveObject(BasicNamingNode.java:679)	at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:176)	at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:181)	at weblogic.jndi.internal.RootNamingNode_WLSkel.invoke(Unknown Source)	at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:296)	at weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java:93)	at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:265)	at weblogic.rmi.internal.BasicServerRef.dispatch(BasicServerRef.java:166)	at weblogic.rmi.internal.ServerRequest.sendOneWayRaw(ServerRequest.java:92)	at weblogic.rmi.internal.ServerRequest.sendReceive(ServerRequest.java:112)	at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:255)	at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:222)	at weblogic.rmi.internal.ProxyStub.invoke(ProxyStub.java:35)	at $Proxy53.lookup(Unknown Source)	at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:323)	at javax.naming.InitialContext.lookup(InitialContext.java:350)	at weblogic.jndi.internal.WLNamingManager.getObjectInstance(WLNamingManager.java:99)	at weblogic.jndi.internal.BasicNamingNode.resolveObject(BasicNamingNode.java:707)	at weblogic.jndi.internal.BasicNamingNode.resolveObject(BasicNamingNode.java:679)	at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:176)	at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:181)	at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:181)	at weblogic.jndi.internal.BasicNamingNode.lookup(BasicNamingNode.java:181)	at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:323)	at weblogic.jndi.factories.java.ReadOnlyContextWrapper.lookup(ReadOnlyContextWrapper.java:36)	at weblogic.jndi.internal.AbstractURLContext.lookup(AbstractURLContext.java:124)	at javax.naming.InitialContext.lookup(InitialContext.java:350)	at com.test.resource.pbs.PBSAdapterSBean.getConnection(PBSAdapterSBean.java:36)	at com.test.resource.pbs.PBSAdapterSBean.test(PBSAdapterSBean.java:23)	at com.test.resource.pbs.PBSAdapterSBean_2debel_EOImpl.test(PBSAdapterSBean_2debel_EOImpl.java:36)	at com.test.resource.pbs.PBSAdapterSBean_2debel_EOImpl_WLSkel.invoke(UnknownSource)	at weblogic.rmi.internal.BasicServerRef.invoke(BasicServerRef.java:296)	at weblogic.rmi.cluster.ReplicaAwareServerRef.invoke(ReplicaAwareServerRef.java:93)	at weblogic.rmi.internal.BasicServerRef.handleRequest(BasicServerRef.java:265)	at weblogic.rmi.internal.BasicServerRef.dispatch(BasicServerRef.java:166)	at weblogic.rmi.internal.ServerRequest.sendOneWayRaw(ServerRequest.java:92)	at weblogic.rmi.internal.ServerRequest.sendReceive(ServerRequest.java:112)	at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:255)	at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:222)	at weblogic.rmi.internal.ProxyStub.invoke(ProxyStub.java:35)	at $Proxy79.test(Unknown Source)	at jsp_servlet.__test._jspService(__test.java:98)	at weblogic.servlet.jsp.JspBase.service(JspBase.java:27)	at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:265)	at weblogic.servlet.internal.ServletStubImpl.invokeServlet(ServletStubImpl.java:200)	at weblogic.servlet.internal.WebAppServletContext.invokeServlet(WebAppServletContext.java:2456)	at weblogic.servlet.internal.ServletRequestImpl.execute(ServletRequestImpl.java:2039)	at weblogic.kernel.ExecuteThread.execute(ExecuteThread.java:139)	at weblogic.kernel.ExecuteThread.run(ExecuteThread.java:120)