[Jetty-support] Re: NullPointerException in Jetty's ContextLoader class.

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> From: Greg Wilkins
> Subject: Re: NullPointerException in Jetty's ContextLoader class.
> Date: 2005-08-24 21:05:12 GMT (13 weeks, 4 days, 3 hours and 7 minutes
ago)

> There was a bug added to the listener that stopped it opening the
socket on
> the second start.

> Fixed in 5.1.5rc1, so give that a try.

> cheers

Hello

I've got some trouble with my Axis 1.3 config. I found the above thread
regarding a problem Artur Zielazny had restarting Axis back in August.

I'm having the same trouble when I use the HTTP Admin tool. (Jetty
5.1.6)

The "stop" works but then when I click the "start", the
"WebApplicationContext" part throws an exception (the
org.mortbay.jetty.servlet.WebApplicationHandler restarts fine).

Do I need to edit my /jetty/etc/admin.xml file when I add a new webapp?

Thanks
Tim

The trace from the exception I get is below:

DEBUG SocketListener1-0 org.mortbay.http.ContextLoader - p0 loaded class
org.apache.axis.transport.http.AdminServlet
DEBUG SocketListener1-0 org.mortbay.jetty.servlet.Holder - Started
holder of class org.apache.axis.transport.http.AdminServlet
DEBUG SocketListener1-0 org.mortbay.jetty.servlet.ServletHandler -
getRealPath of /WEB-INF in
org.mortbay.jetty.servlet.WebApplicationHandler@dfcb47
DEBUG SocketListener1-0 org.mortbay.jetty.servlet.ServletHandler -
getRealPath of / in
org.mortbay.jetty.servlet.WebApplicationHandler@dfcb47
DEBUG SocketListener1-0 org.apache.axis.transport.http.AxisServlet - In
AxisServletBase init
DEBUG SocketListener1-0 org.apache.axis.transport.http.AxisServlet -
Enter: getEngine()
DEBUG SocketListener1-0 org.mortbay.jetty.servlet.ServletHandler -
getRealPath of /WEB-INF in
org.mortbay.jetty.servlet.WebApplicationHandler@dfcb47
DEBUG SocketListener1-0 org.mortbay.http.ContextLoader - try getResource
META-INF/services/org.apache.axis.EngineConfigurationFactory from null
DEBUG SocketListener1-0 org.mortbay.jetty.servlet.ServletHandler -
EXCEPTION 
java.lang.NullPointerException
	at
org.mortbay.http.ContextLoader.getResource(ContextLoader.java:257)
	at
org.apache.commons.discovery.jdk.JDK12Hooks.getResources(JDK12Hooks.java
:149)
	at
org.apache.commons.discovery.resource.DiscoverResources$1.getNextResourc
es(DiscoverResources.java:153)
	at
org.apache.commons.discovery.resource.DiscoverResources$1.getNextResourc
e(DiscoverResources.java:129)
	at
org.apache.commons.discovery.resource.DiscoverResources$1.hasNext(Discov
erResources.java:116)
	at
org.apache.commons.discovery.resource.names.DiscoverNamesInFile$1.getNex
tClassNames(DiscoverNamesInFile.java:186)
	at
org.apache.commons.discovery.resource.names.DiscoverNamesInFile$1.getNex
tClassName(DiscoverNamesInFile.java:170)
	at
org.apache.commons.discovery.resource.names.DiscoverNamesInFile$1.hasNex
t(DiscoverNamesInFile.java:157)
	at
org.apache.commons.discovery.resource.names.NameDiscoverers$1.getNextIte
rator(NameDiscoverers.java:143)
	at
org.apache.commons.discovery.resource.names.NameDiscoverers$1.hasNext(Na
meDiscoverers.java:126)
	at
org.apache.commons.discovery.resource.classes.ResourceClassDiscoverImpl$
1.getNextResource(ResourceClassDiscoverImpl.java:159)
	at
org.apache.commons.discovery.resource.classes.ResourceClassDiscoverImpl$
1.hasNext(ResourceClassDiscoverImpl.java:147)
	at
org.apache.axis.configuration.EngineConfigurationFactoryFinder$1.run(Eng
ineConfigurationFactoryFinder.java:120)
	at java.security.AccessController.doPrivileged(Native Method)
	at
org.apache.axis.configuration.EngineConfigurationFactoryFinder.newFactor
y(EngineConfigurationFactoryFinder.java:113)
	at
org.apache.axis.transport.http.AxisServletBase.getEngineEnvironment(Axis
ServletBase.java:273)
	at
org.apache.axis.transport.http.AxisServletBase.getEngine(AxisServletBase
.java:172)
	at
org.apache.axis.transport.http.AxisServletBase.getOption(AxisServletBase
.java:396)
	at
org.apache.axis.transport.http.AxisServletBase.init(AxisServletBase.java
:112)
	at javax.servlet.GenericServlet.init(GenericServlet.java:168)
	at
org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:3
83)
	at
org.mortbay.jetty.servlet.ServletHolder.start(ServletHolder.java:243)
	at
org.mortbay.jetty.servlet.ServletHandler.initializeServlets(ServletHandl
er.java:446)
	at
org.mortbay.jetty.servlet.WebApplicationHandler.initializeServlets(WebAp
plicationHandler.java:321)
	at
org.mortbay.jetty.servlet.WebApplicationContext.doStart(WebApplicationCo
ntext.java:509)
	at
org.mortbay.jetty.plus.PlusWebAppContext.doStart(PlusWebAppContext.java:
149)
	at org.mortbay.util.Container.start(Container.java:72)
	at
org.mortbay.servlet.AdminServlet.doAction(AdminServlet.java:169)
	at org.mortbay.servlet.AdminServlet.doGet(AdminServlet.java:203)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:596)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
	at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
	at
org.mortbay.jetty.servlet.ServletHandler.dispatch(ServletHandler.java:66
6)
	at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
	at org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
	at org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
	at org.mortbay.http.HttpServer.service(HttpServer.java:927)
	at
org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
	at
org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:983)
	at
org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
	at
org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244
)
	at
org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
	at
org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)
DEBUG SocketListener1-0 org.mortbay.jetty.servlet.WebApplicationHandler
- jsr154filter=null
WARN SocketListener1-0 org.mortbay.servlet.AdminServlet - EXCEPTION 
java.lang.NullPointerException
	at
org.mortbay.http.ContextLoader.getResource(ContextLoader.java:257)
	at
org.apache.commons.discovery.jdk.JDK12Hooks.getResources(JDK12Hooks.java
:149)
	at
org.apache.commons.discovery.resource.DiscoverResources$1.getNextResourc
es(DiscoverResources.java:153)
	at
org.apache.commons.discovery.resource.DiscoverResources$1.getNextResourc
e(DiscoverResources.java:129)
	at
org.apache.commons.discovery.resource.DiscoverResources$1.hasNext(Discov
erResources.java:116)
	at
org.apache.commons.discovery.resource.names.DiscoverNamesInFile$1.getNex
tClassNames(DiscoverNamesInFile.java:186)
	at
org.apache.commons.discovery.resource.names.DiscoverNamesInFile$1.getNex
tClassName(DiscoverNamesInFile.java:170)
	at
org.apache.commons.discovery.resource.names.DiscoverNamesInFile$1.hasNex
t(DiscoverNamesInFile.java:157)
	at
org.apache.commons.discovery.resource.names.NameDiscoverers$1.getNextIte
rator(NameDiscoverers.java:143)
	at
org.apache.commons.discovery.resource.names.NameDiscoverers$1.hasNext(Na
meDiscoverers.java:126)
	at
org.apache.commons.discovery.resource.classes.ResourceClassDiscoverImpl$
1.getNextResource(ResourceClassDiscoverImpl.java:159)
	at
org.apache.commons.discovery.resource.classes.ResourceClassDiscoverImpl$
1.hasNext(ResourceClassDiscoverImpl.java:147)
	at
org.apache.axis.configuration.EngineConfigurationFactoryFinder$1.run(Eng
ineConfigurationFactoryFinder.java:120)
	at java.security.AccessController.doPrivileged(Native Method)
	at
org.apache.axis.configuration.EngineConfigurationFactoryFinder.newFactor
y(EngineConfigurationFactoryFinder.java:113)
	at
org.apache.axis.transport.http.AxisServletBase.getEngineEnvironment(Axis
ServletBase.java:273)
	at
org.apache.axis.transport.http.AxisServletBase.getEngine(AxisServletBase
.java:172)
	at
org.apache.axis.transport.http.AxisServletBase.getOption(AxisServletBase
.java:396)
	at
org.apache.axis.transport.http.AxisServletBase.init(AxisServletBase.java
:112)
	at javax.servlet.GenericServlet.init(GenericServlet.java:168)
	at
org.mortbay.jetty.servlet.ServletHolder.initServlet(ServletHolder.java:3
83)
	at
org.mortbay.jetty.servlet.ServletHolder.start(ServletHolder.java:243)
	at
org.mortbay.jetty.servlet.ServletHandler.initializeServlets(ServletHandl
er.java:446)
	at
org.mortbay.jetty.servlet.WebApplicationHandler.initializeServlets(WebAp
plicationHandler.java:321)
	at
org.mortbay.jetty.servlet.WebApplicationContext.doStart(WebApplicationCo
ntext.java:509)
	at
org.mortbay.jetty.plus.PlusWebAppContext.doStart(PlusWebAppContext.java:
149)
	at org.mortbay.util.Container.start(Container.java:72)
	at
org.mortbay.servlet.AdminServlet.doAction(AdminServlet.java:169)
	at org.mortbay.servlet.AdminServlet.doGet(AdminServlet.java:203)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:596)
	at javax.servlet.http.HttpServlet.service(HttpServlet.java:689)
	at
org.mortbay.jetty.servlet.ServletHolder.handle(ServletHolder.java:428)
	at
org.mortbay.jetty.servlet.ServletHandler.dispatch(ServletHandler.java:66
6)
	at
org.mortbay.jetty.servlet.ServletHandler.handle(ServletHandler.java:568)
	at org.mortbay.http.HttpContext.handle(HttpContext.java:1530)
	at org.mortbay.http.HttpContext.handle(HttpContext.java:1482)
	at org.mortbay.http.HttpServer.service(HttpServer.java:927)
	at
org.mortbay.http.HttpConnection.service(HttpConnection.java:816)
	at
org.mortbay.http.HttpConnection.handleNext(HttpConnection.java:983)
	at
org.mortbay.http.HttpConnection.handle(HttpConnection.java:833)
	at
org.mortbay.http.SocketListener.handleConnection(SocketListener.java:244
)
	at
org.mortbay.util.ThreadedServer.handle(ThreadedServer.java:357)
	at
org.mortbay.util.ThreadPool$PoolThread.run(ThreadPool.java:534)