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Null Pointer Exception when building update site following the tutorials [message #996944]

Thu, 03 January 2013 04:02

Eclipse User

I create an update site project in Eclipse 4.2.0 follow the tutorial http://wiki.eclipse.org/Buckminster/Examples/Building_an_Update_Site#Creating_an_index.html_file

I call action "build.site" from UI and got a NullPointerException in error log
<eclipse> \configuration\org.eclipse.osgi\bundles\271\2\.cp\org\eclipse\buckminster\pde\antscripts\build.xml:348: java.lang.NullPointerException: java.lang.NullPointerException

at

<target name="create.legacy.site" depends="create.legacy.site.common">
<buckminster.updateSiteGenerator versionProperty="site.version" outputfile="${site.xml}" template="${sp:template}">
<buckminster.filesetgroup value="${fs:features}"/>
</buckminster.updateSiteGenerator>
..
</target>

Here is the log file

!ENTRY org.eclipse.buckminster.core 4 293 2013-01-03 15:43:45.145
!MESSAGE org.eclipse.core.runtime.CoreException: D:\Projects\Eclipses\eclipse\configuration\org.eclipse.osgi\bundles\271\2\.cp\org\eclipse\buckminster\pde\antscripts\build.xml:348: java.lang.NullPointerException
!STACK 1
org.eclipse.core.runtime.CoreException: D:\Projects\Eclipses\eclipse\configuration\org.eclipse.osgi\bundles\271\2\.cp\org\eclipse\buckminster\pde\antscripts\build.xml:348: java.lang.NullPointerException
at org.eclipse.buckminster.ant.AntRunner.handleInvocationTargetException(AntRunner.java:167)
at org.eclipse.buckminster.ant.AntRunner.run(AntRunner.java:322)
at org.eclipse.buckminster.ant.actor.AntActor.internalPerform(AntActor.java:254)
at org.eclipse.buckminster.core.actor.AbstractActor.perform(AbstractActor.java:195)
at org.eclipse.buckminster.core.internal.actor.PerformManager$DirectActionInvocation.execute(PerformManager.java:143)
at org.eclipse.buckminster.core.internal.actor.PerformManager.internalPerform(PerformManager.java:454)
at org.eclipse.buckminster.core.internal.actor.PerformManager.perform(PerformManager.java:293)
at org.eclipse.buckminster.core.internal.actor.PerformManager.perform(PerformManager.java:305)
at org.eclipse.buckminster.ui.InvokeActionJob.runInWorkspace(InvokeActionJob.java:67)
at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
Caused by: D:\Projects\Eclipses\eclipse\configuration\org.eclipse.osgi\bundles\271\2\.cp\org\eclipse\buckminster\pde\antscripts\build.xml:348: java.lang.NullPointerException
at org.eclipse.buckminster.pde.ant.UpdateSiteGeneratorTask.execute(UpdateSiteGeneratorTask.java:73)
at org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
at org.apache.tools.ant.Task.perform(Task.java:348)
at org.apache.tools.ant.Target.execute(Target.java:392)
at org.apache.tools.ant.Target.performTasks(Target.java:413)
at org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
at org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
at org.eclipse.ant.internal.core.ant.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)
at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
at org.eclipse.ant.internal.core.ant.InternalAntRunner.run(InternalAntRunner.java:672)
at org.eclipse.ant.internal.core.ant.InternalAntRunner.run(InternalAntRunner.java:498)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.buckminster.ant.AntRunner.run(AntRunner.java:318)
... 9 more
Caused by: java.lang.NullPointerException
at com.sun.org.apache.xml.internal.serializer.ToStream.writeAttrString(Unknown Source)
at com.sun.org.apache.xml.internal.serializer.ToStream.processAttributes(Unknown Source)
at com.sun.org.apache.xml.internal.serializer.ToStream.closeStartTag(Unknown Source)
at com.sun.org.apache.xml.internal.serializer.ToStream.startElement(Unknown Source)
at com.sun.org.apache.xalan.internal.xsltc.trax.TransformerHandlerImpl.startElement(Unknown Source)
at org.eclipse.buckminster.pde.tasks.SaxableSite.writeFeatures(SaxableSite.java:112)
at org.eclipse.buckminster.pde.tasks.SaxableSite.emitElements(SaxableSite.java:191)
at org.eclipse.buckminster.sax.AbstractSaxableElement.toSax(AbstractSaxableElement.java:41)
at org.eclipse.buckminster.pde.tasks.SaxableSite.toSax(SaxableSite.java:147)
at org.eclipse.buckminster.sax.Utils.serialize(Utils.java:308)
at org.eclipse.buckminster.pde.tasks.UpdateSiteGenerator.run(UpdateSiteGenerator.java:132)
at org.eclipse.buckminster.pde.ant.UpdateSiteGeneratorTask.execute(UpdateSiteGeneratorTask.java:67)
... 29 more
!SUBENTRY 1 org.eclipse.ant.core 4 1 2013-01-03 15:43:45.145
!MESSAGE D:\Projects\Eclipses\eclipse\configuration\org.eclipse.osgi\bundles\271\2\.cp\org\eclipse\buckminster\pde\antscripts\build.xml:348: java.lang.NullPointerException

It did not bring me further to figure out what is missing or wrong.
Some one please help me fix it?

Re: Null Pointer Exception when building update site following the tutorials [message #997662 is a reply to message #996944]

Mon, 07 January 2013 07:38

Eclipse User

Hi Dao,

From the looks of it, there are some problems during the writeout of
the site.xml file. Not sure why it happens. I'd like to ask you though,
why are you creating an old legacy update site? That format has been
deprecated for several years now. I wouldn't recommend anyone to use it
today.

- thomas

On 2013-01-03 10:02, Dao Hoang wrote:
> I create an update site project in Eclipse 4.2.0 follow the tutorial
> http://wiki.eclipse.org/Buckminster/Examples/Building_an_Update_Site#Creating_an_index.html_file
>
>
> I call action "build.site" from UI and got a NullPointerException in
> error log <eclipse>
> \configuration\org.eclipse.osgi\bundles\271\2\.cp\org\eclipse\buckminster\pde\antscripts\build.xml:348:
> java.lang.NullPointerException: java.lang.NullPointerException
>
> at
> <target name="create.legacy.site" depends="create.legacy.site.common">
> <buckminster.updateSiteGenerator
> versionProperty="site.version" outputfile="${site.xml}"
> template="${sp:template}">
> <buckminster.filesetgroup value="${fs:features}"/>
> </buckminster.updateSiteGenerator>
> ..
> </target>
>
> Here is the log file
>
> !ENTRY org.eclipse.buckminster.core 4 293 2013-01-03 15:43:45.145
> !MESSAGE org.eclipse.core.runtime.CoreException:
> D:\Projects\Eclipses\eclipse\configuration\org.eclipse.osgi\bundles\271\2\.cp\org\eclipse\buckminster\pde\antscripts\build.xml:348:
> java.lang.NullPointerException
> !STACK 1
> org.eclipse.core.runtime.CoreException:
> D:\Projects\Eclipses\eclipse\configuration\org.eclipse.osgi\bundles\271\2\.cp\org\eclipse\buckminster\pde\antscripts\build.xml:348:
> java.lang.NullPointerException
> at
> org.eclipse.buckminster.ant.AntRunner.handleInvocationTargetException(AntRunner.java:167)
>
> at org.eclipse.buckminster.ant.AntRunner.run(AntRunner.java:322)
> at
> org.eclipse.buckminster.ant.actor.AntActor.internalPerform(AntActor.java:254)
>
> at
> org.eclipse.buckminster.core.actor.AbstractActor.perform(AbstractActor.java:195)
>
> at
> org.eclipse.buckminster.core.internal.actor.PerformManager$DirectActionInvocation.execute(PerformManager.java:143)
>
> at
> org.eclipse.buckminster.core.internal.actor.PerformManager.internalPerform(PerformManager.java:454)
>
> at
> org.eclipse.buckminster.core.internal.actor.PerformManager.perform(PerformManager.java:293)
>
> at
> org.eclipse.buckminster.core.internal.actor.PerformManager.perform(PerformManager.java:305)
>
> at
> org.eclipse.buckminster.ui.InvokeActionJob.runInWorkspace(InvokeActionJob.java:67)
>
> at
> org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:38)
>
> at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)
> Caused by:
> D:\Projects\Eclipses\eclipse\configuration\org.eclipse.osgi\bundles\271\2\.cp\org\eclipse\buckminster\pde\antscripts\build.xml:348:
> java.lang.NullPointerException
> at
> org.eclipse.buckminster.pde.ant.UpdateSiteGeneratorTask.execute(UpdateSiteGeneratorTask.java:73)
>
> at
> org.apache.tools.ant.UnknownElement.execute(UnknownElement.java:291)
> at sun.reflect.GeneratedMethodAccessor47.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> at java.lang.reflect.Method.invoke(Unknown Source)
> at
> org.apache.tools.ant.dispatch.DispatchUtils.execute(DispatchUtils.java:106)
> at org.apache.tools.ant.Task.perform(Task.java:348)
> at org.apache.tools.ant.Target.execute(Target.java:392)
> at org.apache.tools.ant.Target.performTasks(Target.java:413)
> at
> org.apache.tools.ant.Project.executeSortedTargets(Project.java:1399)
> at org.apache.tools.ant.Project.executeTarget(Project.java:1368)
> at
> org.apache.tools.ant.helper.DefaultExecutor.executeTargets(DefaultExecutor.java:41)
>
> at
> org.eclipse.ant.internal.core.ant.EclipseDefaultExecutor.executeTargets(EclipseDefaultExecutor.java:32)
>
> at org.apache.tools.ant.Project.executeTargets(Project.java:1251)
> at
> org.eclipse.ant.internal.core.ant.InternalAntRunner.run(InternalAntRunner.java:672)
>
> at
> org.eclipse.ant.internal.core.ant.InternalAntRunner.run(InternalAntRunner.java:498)
>
> at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
> at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
> at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
> at java.lang.reflect.Method.invoke(Unknown Source)
> at org.eclipse.buckminster.ant.AntRunner.run(AntRunner.java:318)
> ... 9 more
> Caused by: java.lang.NullPointerException
> at
> com.sun.org.apache.xml.internal.serializer.ToStream.writeAttrString(Unknown
> Source)
> at
> com.sun.org.apache.xml.internal.serializer.ToStream.processAttributes(Unknown
> Source)
> at
> com.sun.org.apache.xml.internal.serializer.ToStream.closeStartTag(Unknown Source)
>
> at
> com.sun.org.apache.xml.internal.serializer.ToStream.startElement(Unknown
> Source)
> at
> com.sun.org.apache.xalan.internal.xsltc.trax.TransformerHandlerImpl.startElement(Unknown
> Source)
> at
> org.eclipse.buckminster.pde.tasks.SaxableSite.writeFeatures(SaxableSite.java:112)
>
> at
> org.eclipse.buckminster.pde.tasks.SaxableSite.emitElements(SaxableSite.java:191)
>
> at
> org.eclipse.buckminster.sax.AbstractSaxableElement.toSax(AbstractSaxableElement.java:41)
>
> at
> org.eclipse.buckminster.pde.tasks.SaxableSite.toSax(SaxableSite.java:147)
> at org.eclipse.buckminster.sax.Utils.serialize(Utils.java:308)
> at
> org.eclipse.buckminster.pde.tasks.UpdateSiteGenerator.run(UpdateSiteGenerator.java:132)
>
> at
> org.eclipse.buckminster.pde.ant.UpdateSiteGeneratorTask.execute(UpdateSiteGeneratorTask.java:67)
>
> ... 29 more
> !SUBENTRY 1 org.eclipse.ant.core 4 1 2013-01-03 15:43:45.145
> !MESSAGE
> D:\Projects\Eclipses\eclipse\configuration\org.eclipse.osgi\bundles\271\2\.cp\org\eclipse\buckminster\pde\antscripts\build.xml:348:
> java.lang.NullPointerException
>
>
> It did not bring me further to figure out what is missing or wrong.
> Some one please help me fix it?

Re: Null Pointer Exception when building update site following the tutorials [message #999083 is a reply to message #997662]

Fri, 11 January 2013 04:50

Eclipse User

Hi Thomas,

I wanted to make an update-site including required features for our tool and I found this tutorial.I did and success with this project before with Eclipse 3.6 and compatible Buckminster.

But now, our product is upgraded to Eclipse 4.2, I re-used the old project and got this problem. What I should do? Create a new project and follow exactly the tutorial, or could you please suggest me a newer tutorial to move on.

Thanks and regards,
Dao

Re: Null Pointer Exception when building update site following the tutorials [message #1001251 is a reply to message #999083]

Wed, 16 January 2013 05:21

Eclipse User

Would it be possible for you to simply skip the legacy site and just
create a proper p2 site? A 'site.xml' shouldn't be needed anymore.

- thomas

On 2013-01-11 10:50, Dao Hoang wrote:
> Hi Thomas,
>
> I wanted to make an update-site including required features for our tool
> and I found this tutorial.I did and success with this project before
> with Eclipse 3.6 and compatible Buckminster.
>
> But now, our product is upgraded to Eclipse 4.2, I re-used the old
> project and got this problem. What I should do? Create a new project and
> follow exactly the tutorial, or could you please suggest me a newer
> tutorial to move on.
>
> Thanks and regards,
> Dao

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