If you run linkcheck on a project and there is more than zero files with errors, then the resulting report is incomplete. The table that shows which files have errors and warnings is not shown. The reason for this is a bug in linkcheck.jsl and the jelly syntax. Testcase and patch coming soon.
This link was helpful in finding the reason for the failure:
http://mail-archives.apache.org/mod_mbox/maven-users/200506.mbox/%3Cc38ad92d0506212340686a5dcb@mail.gmail.com%3E
Here's the stack trace I get:
Links checked.
Caught exception evaluating: org.apache.commons.jexl.ExpressionImpl@15078d. Reason: java.lang.Exception: Invalid comparison : GT
java.lang.Exception: Invalid comparison : GT
at org.apache.commons.jexl.parser.ASTGTNode.value(ASTGTNode.java:104)
at org.apache.commons.jexl.parser.ASTExpression.value(ASTExpression.java:85)
at org.apache.commons.jexl.ExpressionImpl.evaluate(ExpressionImpl.java:123)
at org.apache.commons.jelly.expression.jexl.JexlExpression.evaluate(JexlExpression.java:115)
at org.apache.commons.jelly.expression.ExpressionSupport.evaluateRecurse(ExpressionSupport.java:106)
at org.apache.commons.jelly.expression.ExpressionSupport.evaluateAsBoolean(ExpressionSupport.java:116)
at org.apache.commons.jelly.tags.core.IfTag.doTag(IfTag.java:87)
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.impl.StaticTag.doTag(StaticTag.java:111)
at org.apache.commons.jelly.impl.StaticTagScript.run(StaticTagScript.java:145)
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.impl.StaticTag.doTag(StaticTag.java:111)
at org.apache.commons.jelly.impl.StaticTagScript.run(StaticTagScript.java:145)
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.impl.StaticTag.doTag(StaticTag.java:111)
at org.apache.commons.jelly.impl.StaticTagScript.run(StaticTagScript.java:145)
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.jsl.TemplateTag$1.run(TemplateTag.java:160)
at org.dom4j.rule.Mode.fireRule(Mode.java:51)
at org.dom4j.rule.Mode.applyTemplates(Mode.java:71)
at org.dom4j.rule.RuleManager$1.run(RuleManager.java:148)
at org.dom4j.rule.Mode.fireRule(Mode.java:51)
at org.dom4j.rule.Stylesheet.run(Stylesheet.java:73)
at org.dom4j.rule.Stylesheet.run(Stylesheet.java:65)
at org.dom4j.rule.Stylesheet.run(Stylesheet.java:57)
at org.apache.commons.jelly.tags.jsl.StylesheetTag.doTag(StylesheetTag.java:124)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.JellyContext.runScript(JellyContext.java:634)
at org.apache.commons.jelly.JellyContext.runScript(JellyContext.java:584)
at org.apache.commons.jelly.tags.core.IncludeTag.doTag(IncludeTag.java:143)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.commons.jelly.TagSupport.invokeBody(TagSupport.java:233)
at org.apache.commons.jelly.tags.core.FileTag.writeBody(FileTag.java:207)
at org.apache.commons.jelly.tags.core.FileTag.doTag(FileTag.java:103)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.commons.jelly.impl.DynamicTag.doTag(DynamicTag.java:125)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:79)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag$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.commons.jelly.TagSupport.invokeBody(TagSupport.java:233)
at com.werken.werkz.jelly.PostGoalTag$1.firePostGoal(PostGoalTag.java:87)
at com.werken.werkz.Goal.firePostGoalCallbacks(Goal.java:710)
at com.werken.werkz.Goal.fire(Goal.java:654)
at com.werken.werkz.Goal.attain(Goal.java:575)
at com.werken.werkz.WerkzProject.attainGoal(WerkzProject.java:193)
at org.apache.maven.jelly.tags.werkz.MavenAttainGoalTag.doTag(MavenAttainGoalTag.java:127)
at org.apache.commons.jelly.impl.TagScript.run(TagScript.java:279)
at org.apache.commons.jelly.impl.ScriptBlock.run(ScriptBlock.java:135)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag.runBodyTag(MavenGoalTag.java:79)
at org.apache.maven.jelly.tags.werkz.MavenGoalTag$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.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 org.apache.maven.plugin.PluginManager.attainGoals(PluginManager.java:671)
at org.apache.maven.MavenSession.attainGoals(MavenSession.java:263)
at org.apache.maven.cli.App.doMain(App.java:488)
at org.apache.maven.cli.App.main(App.java:1239)
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)
Testcase that reproduces this issue.