Hello all,
I am using tomcat 4.0.1 (and jdk1.3.1)
In my servlet, the getInitParameter() throws an NullPointerException
...(stack trace below)... ..... but where is the null pointer ?
code is ............ String path = getInitParameter("properties");
Is there something wrong with my declarations in the web.xml file ?
My web.xml looks like this :
<web-app>
<display-name>Centauri</display-name>
<servlet>
<servlet-name>com.proxima.centauri.webinterface.servlets.MainServlet</servlet-name>
<servlet-class>com.proxima.centauri.webinterface.servlets.MainServlet</servlet-class>
<init-param>
<param-name>properties</param-name>
<param-value>/WEB-INF/MainServlet</param-value>
</init-param>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- servlet mappings follow -->
<servlet-mapping>
<servlet-name>com.proxima.centauri.webinterface.servlets.MainServlet</servlet-name>
<url-pattern>/MainServlet/*</url-pattern>
</servlet-mapping>
..........................................
001-12-12 15:06:32
StandardWrapperValve[com.proxima.centauri.webinterface.servlets.MainServlet]:
Allocate exception for servlet
com.proxima.centauri.webinterface.servlets.MainServlet
javax.servlet.ServletException: Servlet.init() for servlet
com.proxima.centauri.webinterface.servlets.MainServlet threw exception
at java.lang.Throwable.<init>(Throwable.java:96)
at java.lang.Exception.<init>(Exception.java:44)
at javax.servlet.ServletException.<init>(ServletException.java:132)
at
org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:871)
at
org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:615)
at
org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:214)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:201)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2344)
at
org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:164)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at
org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:170)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at
org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:462)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:564)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:163)
at
org.apache.catalina.core.StandardPipeline.invokeNext(StandardPipeline.java:566)
at
org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:472)
at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:943)
at
org.apache.catalina.connector.http.HttpProcessor.process(HttpProcessor.java:1011)
at
org.apache.catalina.connector.http.HttpProcessor.run(HttpProcessor.java:1106)
at java.lang.Thread.run(Thread.java:498)
----- Root Cause -----
java.lang.NullPointerException
at
javax.servlet.GenericServlet.getInitParameter(GenericServlet.java:145)
at
com.proxima.centauri.webinterface.servlets.MainServlet.init(MainServlet.java:255)
at ..........etc.
etienne
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