我在Linux上运行apache tomcat 7.0.63上的应用程序，它在server.xml GlobalNamingResources部分使用数据源设置。然后在context.xml中我们有一个引用它的ResourceLink设置。这些在应用程序的WEB-INF / web.xml文件中引用。在7.0.63上运行时，它运行良好，但是当在7.0.82二进制文件上运行时，我收到错误。我一直在深入研究这一段时间，任何人都有任何有用的提示，关于接下来要看什么？
以下是我看到的内容：
首先，初始错误：
SEVERE: Servlet.service() for servlet [jsp] in context with path [/Foobar] threw exception [An exception occurred processing JSP page /foobar/foobar.jsp at line 46
来自同一日志的RootCause：
Stacktrace:] with root cause
java.lang.NullPointerException
at foo.bar.dal.OracleDatabaseConnector.open(OracleDatabaseConnector.java:31)
at foo.bar.dal.DataAccess.openConnection(DataAccess.java:81)
at foo.bar.referralForm.ReferralFormPageBean.lookupUserFromLdap(ReferralFormPageBean.java:412)
at foo.bar.referralForm.ReferralFormPageBean.initIfLoaded(ReferralFormPageBean.java:58)
at foo.bar.referralForm.ReferralFormPageBean.setResponse(ReferralFormPageBean.java:53)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:606)
at org.apache.jasper.runtime.JspRuntimeLibrary.handleSetPropertyExpression(JspRuntimeLibrary.java:562)
at org.apache.jsp.ReferralForm.InvestigativeReferralForm_jsp._jspService(InvestigativeReferralForm_jsp.java:166)
at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:70)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:439)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:395)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:339)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:731)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:219)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:110)
at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:506)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:169)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:103)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:962)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:445)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1115)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:637)
at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:316)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:744)