I've got an exception coming out in my test:test target which I just can't
figure out. It's a LinkageError loading org.w3c.dom.Document. My
understanding of this error is that the classloader needs to load the same
class from two different jars, but I can't figure out which jars. The obvious
suspect is xml-apis.jar, of which we have only version 1.0.b2. Other suspects
for which there is less justification are xalan 2.5.1 and xerces 2.4.0.
To try to figure this out, in my code I asked for the classloader and found it
was an AntClassloader. You can ask the AntClassloader what classpath it is
using, so I did that. Then, from a command line, I could use that classpath
to run the unit tests and they worked just fine. So I believe that somewhere
in ant or maven, the classloaders are getting tangled up and causing this
error.
Unfortunately that extremely vague explanation doesn't help me get my tests to
run. If anyone has any ideas on what could be wrong, or what I could try to
get further information, please let me know. I am kind of at my half-wit's
end here :-(. Thanks,
John
----
[junit] java.lang.LinkageError: loader constraints violated when linking
org/w3c/dom/Document class
[junit] at
com.mincom.util.xml.xfs.XfsFile.parseString(XfsFile.java:87)
[junit] at com.mincom.util.xml.xfs.XfsFile.parse(XfsFile.java:76)
[junit] at
com.mincom.util.xml.xfs.XFSUnitTest.testDTDUpdate(XFSUnitTest.java:59)
[junit] at
org.apache.commons.jelly.tags.ant.AntTag.doTag(AntTag.java:232)
[junit] at
org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
[junit] at
org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
[junit] at
org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:233)
[junit] at
org.apache.commons.jelly.tags.core.IfTag.doTag(IfTag.java:88)
[junit] at
org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
[junit] at
org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
[junit] at
org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:233)
[junit] at
com.werken.werkz.jelly.GoalTag$1.performAction(GoalTag.java:128)
[junit] at com.werken.werkz.Goal.fire(Goal.java:639)
[junit] at com.werken.werkz.Goal.attain(Goal.java:575)
[junit] at
com.werken.werkz.WerkzProject.attainGoal(WerkzProject.java:193)
[junit] at
com.werken.werkz.jelly.AttainGoalTag.doTag(AttainGoalTag.java:134)
[junit] at
org.apache.maven.jelly.tags.werkz.LazyAttainGoalTag.doTag(LazyAttainGoalTag.java:107)
[junit] at
org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
[junit] at
org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
[junit] at
org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:233)
[junit] at
com.werken.werkz.jelly.GoalTag$1.performAction(GoalTag.java:128)
[junit] at com.werken.werkz.Goal.fire(Goal.java:639)
[junit] at com.werken.werkz.Goal.attain(Goal.java:575)
[junit] at
com.werken.werkz.WerkzProject.attainGoal(WerkzProject.java:193)
[junit] at
com.werken.werkz.jelly.AttainGoalTag.doTag(AttainGoalTag.java:134)
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