Maven 1

<attainGoal> java.lang.NullPointerException when running multiproject

Details

  • Type: Bug Bug
  • Status: Closed Closed
  • Priority: Major Major
  • Resolution: Fixed
  • Affects Version/s: 1.0
  • Fix Version/s: 1.0.1
  • Component/s: None
  • Labels:
    None
  • Environment:
    Fedora Core 2
  • Number of attachments :
    1

Description

It's really hard to know which module this problem belongs to...

When running maven -X multiproject, I get the following towards the end of the generation:

BUILD FAILED
File...... /home/maven/.maven/cache/maven-xdoc-plugin-1.8/plugin.jelly
Element... attainGoal
Line...... 689
Column.... 48
java.lang.NullPointerException
com.werken.werkz.UnattainableGoalException: Unable to obtain goal [multiproject:site] – /home/maven/.maven/cache/maven-xdoc-plugin-1.8/plugin.jelly:689:48: <attainGoal> java.lang.NullPointerException
at com.werken.werkz.Goal.fire(Goal.java:646)
at com.werken.werkz.Goal.attain(Goal.java:575)
at com.werken.werkz.Goal.attainPrecursors(Goal.java:488)
at com.werken.werkz.Goal.attain(Goal.java:573)
at com.werken.werkz.WerkzProject.attainGoal(WerkzProject.java:193)
at org.apache.maven.plugin.PluginManager.attainGoals(PluginManager.java:634)
at org.apache.maven.MavenSession.attainGoals(MavenSession.java:266)
at org.apache.maven.cli.App.doMain(App.java:486)
at org.apache.maven.cli.App.main(App.java:1215)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.werken.forehead.Forehead.run(Forehead.java:551)
at com.werken.forehead.Forehead.main(Forehead.java:581)
org.apache.commons.jelly.JellyTagException: /home/maven/.maven/cache/maven-xdoc-plugin-1.8/plugin.jelly:689:48: <attainGoal> java.lang.NullPointerException
at org.apache.commons.jelly.impl.TagScript.handleException(TagScript.java:683)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:288)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:233)
at org.apache.commons.jelly.tags.core.ForEachTag.doTag(ForEachTag.java:145)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:233)
at org.apache.commons.jelly.tags.core.IfTag.doTag(IfTag.java:88)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:79)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag.java:110)
at com.werken.werkz.Goal.fire(Goal.java:639)
at com.werken.werkz.Goal.attain(Goal.java:575)
at com.werken.werkz.Goal.attainPrecursors(Goal.java:488)
at com.werken.werkz.Goal.attain(Goal.java:573)
at com.werken.werkz.Goal.attainPrecursors(Goal.java:488)
at com.werken.werkz.Goal.attain(Goal.java:573)
at com.werken.werkz.WerkzProject.attainGoal(WerkzProject.java:193)
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.doTag(MavenAttainGoalTag.java:127)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:79)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag.java:110)
at com.werken.werkz.Goal.fire(Goal.java:639)
at com.werken.werkz.Goal.attain(Goal.java:575)
at com.werken.werkz.WerkzProject.attainGoal(WerkzProject.java:193)
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.doTag(MavenAttainGoalTag.java:127)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:79)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag.java:110)
at com.werken.werkz.Goal.fire(Goal.java:639)
at com.werken.werkz.Goal.attain(Goal.java:575)
at com.werken.werkz.Goal.attainPrecursors(Goal.java:488)
at com.werken.werkz.Goal.attain(Goal.java:573)
at com.werken.werkz.WerkzProject.attainGoal(WerkzProject.java:193)
at org.apache.maven.plugin.PluginManager.attainGoals(PluginManager.java:634)
at org.apache.maven.MavenSession.attainGoals(MavenSession.java:266)
at org.apache.maven.cli.App.doMain(App.java:486)
at org.apache.maven.cli.App.main(App.java:1215)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.werken.forehead.Forehead.run(Forehead.java:551)
at com.werken.forehead.Forehead.main(Forehead.java:581)
Caused by: java.lang.NullPointerException
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.getSession(MavenAttainGoalTag.java:84)
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.invokeBody(MavenAttainGoalTag.java:166)
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.doTag(MavenAttainGoalTag.java:107)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
... 46 more
Root cause
java.lang.NullPointerException
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.getSession(MavenAttainGoalTag.java:84)
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.invokeBody(MavenAttainGoalTag.java:166)
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.doTag(MavenAttainGoalTag.java:107)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:233)
at org.apache.commons.jelly.tags.core.ForEachTag.doTag(ForEachTag.java:145)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:233)
at org.apache.commons.jelly.tags.core.IfTag.doTag(IfTag.java:88)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:79)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag.java:110)
at com.werken.werkz.Goal.fire(Goal.java:639)
at com.werken.werkz.Goal.attain(Goal.java:575)
at com.werken.werkz.Goal.attainPrecursors(Goal.java:488)
at com.werken.werkz.Goal.attain(Goal.java:573)
at com.werken.werkz.Goal.attainPrecursors(Goal.java:488)
at com.werken.werkz.Goal.attain(Goal.java:573)
at com.werken.werkz.WerkzProject.attainGoal(WerkzProject.java:193)
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.doTag(MavenAttainGoalTag.java:127)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:79)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag.java:110)
at com.werken.werkz.Goal.fire(Goal.java:639)
at com.werken.werkz.Goal.attain(Goal.java:575)
at com.werken.werkz.WerkzProject.attainGoal(WerkzProject.java:193)
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.doTag(MavenAttainGoalTag.java:127)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:79)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag.java:110)
at com.werken.werkz.Goal.fire(Goal.java:639)
at com.werken.werkz.Goal.attain(Goal.java:575)
at com.werken.werkz.Goal.attainPrecursors(Goal.java:488)
at com.werken.werkz.Goal.attain(Goal.java:573)
at com.werken.werkz.WerkzProject.attainGoal(WerkzProject.java:193)
at org.apache.maven.plugin.PluginManager.attainGoals(PluginManager.java:634)
at org.apache.maven.MavenSession.attainGoals(MavenSession.java:266)
at org.apache.maven.cli.App.doMain(App.java:486)
at org.apache.maven.cli.App.main(App.java:1215)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.werken.forehead.Forehead.run(Forehead.java:551)
at com.werken.forehead.Forehead.main(Forehead.java:581)
Root cause
java.lang.NullPointerException
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.getSession(MavenAttainGoalTag.java:84)
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.invokeBody(MavenAttainGoalTag.java:166)
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.doTag(MavenAttainGoalTag.java:107)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:233)
at org.apache.commons.jelly.tags.core.ForEachTag.doTag(ForEachTag.java:145)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:233)
at org.apache.commons.jelly.tags.core.IfTag.doTag(IfTag.java:88)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:79)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag.java:110)
at com.werken.werkz.Goal.fire(Goal.java:639)
at com.werken.werkz.Goal.attain(Goal.java:575)
at com.werken.werkz.Goal.attainPrecursors(Goal.java:488)
at com.werken.werkz.Goal.attain(Goal.java:573)
at com.werken.werkz.Goal.attainPrecursors(Goal.java:488)
at com.werken.werkz.Goal.attain(Goal.java:573)
at com.werken.werkz.WerkzProject.attainGoal(WerkzProject.java:193)
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.doTag(MavenAttainGoalTag.java:127)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:79)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag.java:110)
at com.werken.werkz.Goal.fire(Goal.java:639)
at com.werken.werkz.Goal.attain(Goal.java:575)
at com.werken.werkz.WerkzProject.attainGoal(WerkzProject.java:193)
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.doTag(MavenAttainGoalTag.java:127)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:79)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag.java:110)
at com.werken.werkz.Goal.fire(Goal.java:639)
at com.werken.werkz.Goal.attain(Goal.java:575)
at com.werken.werkz.WerkzProject.attainGoal(WerkzProject.java:193)
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.doTag(MavenAttainGoalTag.java:127)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:79)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag$MavenGoalAction.performAction(MavenGoalTag.java:110)
at com.werken.werkz.Goal.fire(Goal.java:639)
at com.werken.werkz.Goal.attain(Goal.java:575)
at com.werken.werkz.Goal.attainPrecursors(Goal.java:488)
at com.werken.werkz.Goal.attain(Goal.java:573)
at com.werken.werkz.WerkzProject.attainGoal(WerkzProject.java:193)
at org.apache.maven.plugin.PluginManager.attainGoals(PluginManager.java:634)
at org.apache.maven.MavenSession.attainGoals(MavenSession.java:266)
at org.apache.maven.cli.App.doMain(App.java:486)
at org.apache.maven.cli.App.main(App.java:1215)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at com.werken.forehead.Forehead.run(Forehead.java:551)
at com.werken.forehead.Forehead.main(Forehead.java:581)
Final Memory: 122M/219M
Total time: 2 minutes 8 seconds
Finished at: Mon Oct 18 10:07:20 CEST 2004

Please advice what I can do to provide more debug information...

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Brett Porter added a comment -

can you provide any <reports> sections in the project.xml files involved in the build.

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Brett Porter added a comment - can you provide any <reports> sections in the project.xml files involved in the build.
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Brett Porter added a comment -

I will have to close this "cannot reproduce" without knowing the reports section.

I will attempt to correct the NPE error reporting in 1.0.1 though.

Show
Brett Porter added a comment - I will have to close this "cannot reproduce" without knowing the reports section. I will attempt to correct the NPE error reporting in 1.0.1 though.
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Håvard Bjåstad added a comment -

After some more investigation, I've found the problem. There was a module dependency that didn't have the latest version in the repository.

In other words, the problem was self-inflicted, so this issue should really be about improving the error handling. A missing dependency should not result in a NPE, but rather an appropriate error message. I hope this will be improved in the next version.

Show
Håvard Bjåstad added a comment - After some more investigation, I've found the problem. There was a module dependency that didn't have the latest version in the repository. In other words, the problem was self-inflicted, so this issue should really be about improving the error handling. A missing dependency should not result in a NPE, but rather an appropriate error message. I hope this will be improved in the next version.
Hide
Permalink
Brett Porter added a comment -

Håvard, I'm not sure I understand your situation with a missing dependency, because I'm not sure at what stage this error occurs.

Do you have a small project that demonstrates this problem so that it can be replicated? I'd really like to fix the source of the problem.

In the next version, I have changed this to a warning rather than trying to dereference something that doesn't exist - hopefully this will cause the error to show up in a more informative location.

Show
Brett Porter added a comment - Håvard, I'm not sure I understand your situation with a missing dependency, because I'm not sure at what stage this error occurs. Do you have a small project that demonstrates this problem so that it can be replicated? I'd really like to fix the source of the problem. In the next version, I have changed this to a warning rather than trying to dereference something that doesn't exist - hopefully this will cause the error to show up in a more informative location.
Hide
Permalink
Håvard Bjåstad added a comment -

Brett, I have investigated this a bit more, and the NPE occurs only if we tell multiproject to ignore errors:
maven.multiproject.ignoreFailures=true

I will attach a zip file with three mini-projects that illustrate the situation. Please let me know if you need more input.

Show
Håvard Bjåstad added a comment - Brett, I have investigated this a bit more, and the NPE occurs only if we tell multiproject to ignore errors: maven.multiproject.ignoreFailures=true I will attach a zip file with three mini-projects that illustrate the situation. Please let me know if you need more input.
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Håvard Bjåstad added a comment -

3 mini-projects that illustrate the NPE problem.
Unzip the file, cd into tt-main and run 'maven multiproject'.
See tt-main/project.properties for how to stop and complain, rather than continue to get NPE.

Show
Håvard Bjåstad added a comment - 3 mini-projects that illustrate the NPE problem. Unzip the file, cd into tt-main and run 'maven multiproject'. See tt-main/project.properties for how to stop and complain, rather than continue to get NPE.
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Brett Porter added a comment -

fixed this specific instance of the problem.
will need to do a bit of work on the reactor/attainGoals in 1.1 to improve handling if there were a fatal exception.

Show
Brett Porter added a comment - fixed this specific instance of the problem. will need to do a bit of work on the reactor/attainGoals in 1.1 to improve handling if there were a fatal exception.

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Dates

  • Created:
    Updated:
    Resolved:
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