Hi all,
I cloned the master branch of Apache Sling Starter Application[1]. Then I
built the application from "mvn clean install". After that I tried to
access Browse Content from [2] without login with "admin admin". Then below
error occurred.
Internal Server Error (500)
The requested URL /bin/browser.html resulted in an error in
com.composum.sling.nodes.browser.BrowserServlet.
Exception:
java.lang.NullPointerException
at com.composum.sling.core.util.LinkUtil.getExtension(LinkUtil.java:342)
at com.composum.sling.core.util.LinkUtil.getExtension(LinkUtil.java:299)
at com.composum.sling.core.util.LinkUtil.getUrl(LinkUtil.java:136)
at com.composum.sling.core.util.LinkUtil.getUrl(LinkUtil.java:94)
at com.composum.sling.core.util.LinkUtil.getUrl(LinkUtil.java:45)
at
com.composum.sling.core.servlet.AbstractConsoleServlet.doGet(AbstractConsoleServlet.java:80)
at
org.apache.sling.api.servlets.SlingSafeMethodsServlet.mayService(SlingSafeMethodsServlet.java:266)
at
org.apache.sling.api.servlets.SlingSafeMethodsServlet.service(SlingSafeMethodsServlet.java:342)
at
org.apache.sling.api.servlets.SlingSafeMethodsServlet.service(SlingSafeMethodsServlet.java:374)
at
org.apache.sling.engine.impl.request.RequestData.service(RequestData.java:552)
at
org.apache.sling.engine.impl.filter.SlingComponentFilterChain.render(SlingComponentFilterChain.java:44)
at
org.apache.sling.engine.impl.filter.AbstractSlingFilterChain.doFilter(AbstractSlingFilterChain.java:77)
at
org.apache.sling.engine.impl.SlingRequestProcessorImpl.processComponent(SlingRequestProcessorImpl.java:282)
at
org.apache.sling.engine.impl.filter.RequestSlingFilterChain.render(RequestSlingFilterChain.java:49)
at
org.apache.sling.engine.impl.filter.AbstractSlingFilterChain.doFilter(AbstractSlingFilterChain.java:77)
at
org.apache.sling.engine.impl.debug.RequestProgressTrackerLogFilter.doFilter(RequestProgressTrackerLogFilter.java:107)
at
org.apache.sling.engine.impl.filter.AbstractSlingFilterChain.doFilter(AbstractSlingFilterChain.java:68)
at org.apache.sling.i18n.impl.I18NFilter.doFilter(I18NFilter.java:131)
at
org.apache.sling.engine.impl.filter.AbstractSlingFilterChain.doFilter(AbstractSlingFilterChain.java:68)
at
org.apache.sling.engine.impl.SlingRequestProcessorImpl.doProcessRequest(SlingRequestProcessorImpl.java:151)
at
org.apache.sling.engine.impl.SlingMainServlet.service(SlingMainServlet.java:234)
at
org.apache.felix.http.base.internal.handler.ServletHandler.handle(ServletHandler.java:120)
at
org.apache.felix.http.base.internal.dispatch.InvocationChain.doFilter(InvocationChain.java:86)
at
org.apache.felix.http.sslfilter.internal.SslFilter.doFilter(SslFilter.java:96)
at
org.apache.felix.http.base.internal.handler.FilterHandler.handle(FilterHandler.java:135)
at
org.apache.felix.http.base.internal.dispatch.InvocationChain.doFilter(InvocationChain.java:81)
at org.apache.sling.i18n.impl.I18NFilter.doFilter(I18NFilter.java:131)
at
org.apache.felix.http.base.internal.handler.FilterHandler.handle(FilterHandler.java:135)
at
org.apache.felix.http.base.internal.dispatch.InvocationChain.doFilter(InvocationChain.java:81)
at
org.apache.sling.engine.impl.log.RequestLoggerFilter.doFilter(RequestLoggerFilter.java:72)
at
org.apache.felix.http.base.internal.handler.FilterHandler.handle(FilterHandler.java:135)
at
org.apache.felix.http.base.internal.dispatch.InvocationChain.doFilter(InvocationChain.java:81)
at
org.apache.sling.engine.impl.parameters.RequestParameterSupportConfigurer.doFilter(RequestParameterSupportConfigurer.java:63)
at
org.apache.felix.http.base.internal.handler.FilterHandler.handle(FilterHandler.java:135)
at
org.apache.felix.http.base.internal.dispatch.InvocationChain.doFilter(InvocationChain.java:81)
at
org.apache.felix.http.base.internal.dispatch.Dispatcher$1.doFilter(Dispatcher.java:146)
at
org.apache.felix.http.base.internal.whiteboard.WhiteboardManager.invokePreprocessors(WhiteboardManager.java:1000)
at
org.apache.felix.http.base.internal.dispatch.Dispatcher.dispatch(Dispatcher.java:91)
at
org.apache.felix.http.base.internal.dispatch.DispatcherServlet.service(DispatcherServlet.java:49)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)
at
org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:864)
at
org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:535)
at
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
at
org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:1595)
at
org.eclipse.jetty.server.handler.ScopedHandler.nextHandle(ScopedHandler.java:255)
at
org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1253)
at
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:203)
at
org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:473)
at
org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:1564)
at
org.eclipse.jetty.server.handler.ScopedHandler.nextScope(ScopedHandler.java:201)
at
org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1155)
at
org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:144)
at
org.eclipse.jetty.server.handler.ContextHandlerCollection.handle(ContextHandlerCollection.java:219)
at
org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:132)
at org.eclipse.jetty.server.Server.handle(Server.java:531)
at org.eclipse.jetty.server.HttpChannel.handle(HttpChannel.java:352)
at
org.eclipse.jetty.server.HttpConnection.onFillable(HttpConnection.java:260)
at
org.eclipse.jetty.io.AbstractConnection$ReadCallback.succeeded(AbstractConnection.java:281)
at org.eclipse.jetty.io.FillInterest.fillable(FillInterest.java:102)
at org.eclipse.jetty.io.ChannelEndPoint$2.run(ChannelEndPoint.java:118)
at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.doProduce(EatWhatYouKill.java:319)
at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.tryProduce(EatWhatYouKill.java:175)
at
org.eclipse.jetty.util.thread.strategy.EatWhatYouKill.run(EatWhatYouKill.java:133)
at
org.eclipse.jetty.util.thread.ReservedThreadExecutor$ReservedThread.run(ReservedThreadExecutor.java:366)
at
org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:754)
at
org.eclipse.jetty.util.thread.QueuedThreadPool$2.run(QueuedThreadPool.java:672)
at java.lang.Thread.run(Thread.java:748)
Request Progress:
0 TIMER_START{Request Processing}
2 COMMENT timer_end format is {<elapsed microseconds>,<timer
name>} <optional message>
14 LOG Method=GET, PathInfo=null
23 TIMER_START{handleSecurity}
1427 TIMER_END{1401,handleSecurity} authenticator
org.apache.sling.auth.core.impl.SlingAuthenticator@3493e758 returns
true
3599 TIMER_START{ResourceResolution}
3799 TIMER_END{197,ResourceResolution} URI=/bin/browser.html
resolves to Resource=ServletResource,
servlet=com.composum.sling.nodes.browser.BrowserServlet,
path=/bin/browser
3812 LOG Resource Path Info: SlingRequestPathInfo:
path='/bin/browser', selectorString='null', extension='html',
suffix='null'
3813 TIMER_START{ServletResolution}
3819 TIMER_START{resolveServlet(/bin/browser)}
3848 TIMER_END{26,resolveServlet(/bin/browser)} Using servlet
com.composum.sling.nodes.browser.BrowserServlet
3857 TIMER_END{42,ServletResolution} URI=/bin/browser.html handled
by Servlet=com.composum.sling.nodes.browser.BrowserServlet
3864 LOG Applying Requestfilters
3875 LOG Calling filter: org.apache.sling.i18n.impl.I18NFilter
3885 LOG Calling filter:
org.apache.sling.engine.impl.debug.RequestProgressTrackerLogFilter
3892 LOG Applying Componentfilters
3910 TIMER_START{com.composum.sling.nodes.browser.BrowserServlet#0}
4395 TIMER_END{482,com.composum.sling.nodes.browser.BrowserServlet#0}
4501 LOG Filter timing:
filter=org.apache.sling.engine.impl.debug.RequestProgressTrackerLogFilter,
inner=1, total=1, outer=0
5317 LOG Applying Error filters
5335 LOG Calling filter: org.apache.sling.i18n.impl.I18NFilter
5354 TIMER_START{handleError:throwable=java.lang.NullPointerException}
6726 TIMER_END{1367,handleError:throwable=java.lang.NullPointerException}
Using handler
org.apache.sling.servlets.resolver.internal.defaults.DefaultErrorHandlerServlet
8663 TIMER_END{8659,Request Processing} Dumping
SlingRequestProgressTracker Entries
------------------------------
[1] - https://github.com/apache/sling-org-apache-sling-starter/tree/master
[2] - http://localhost:8080/bin/browser.html
Thank You.
--
*Hasini Witharana*
Undergraduate | Department of Computer Science and Engineering
University of Moratuwa
Linkedin <https://www.linkedin.com/in/hasini-witharana-185785109/>
