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http://jira.codehaus.org/browse/MJAVADOC-302?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=253164#action_253164
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Bryon Jacob commented on MJAVADOC-302:
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a workaround, which might help indicate the source of the problem, is to use
the "aggregate" goal instead of the "javadoc" goal.
it appears that the two goals do essentially the same thing, except that the
aggregate goal is run as an aggregator plugin:
http://maven.apache.org/plugins/maven-javadoc-plugin/javadoc-mojo.html
http://maven.apache.org/plugins/maven-javadoc-plugin/aggregate-mojo.html
http://docs.codehaus.org/display/MAVEN/Aggregator+Plugins
which has the benefit that the execution is always forked, so the classpath
munging doesn't affect the rest of your lifecycle. Looking at the source, you
can see that the "aggregate" goal simply extends the "javadoc" goal and turns
on the "aggregator" bit:
http://maven.apache.org/plugins/maven-javadoc-plugin/xref/org/apache/maven/plugin/javadoc/AggregatorJavadocReport.html
Looking at the wiki on Aggregator Plugins, I don't see any reason why it should
be dangerous to use that on a non-aggregate project, and empirically, this
seems to work around the issues Bryan mentions above.
> Classpath cleared after maven-javadoc-plugin:javadoc
> ----------------------------------------------------
>
> Key: MJAVADOC-302
> URL: http://jira.codehaus.org/browse/MJAVADOC-302
> Project: Maven 2.x Javadoc Plugin
> Issue Type: Bug
> Affects Versions: 2.5, 2.6, 2.6.1, 2.7
> Environment: mac OSX 10.6.4
> Reporter: Bryan Campbell
> Priority: Blocker
>
> Repro Case:
> - I have a war based maven configuration with the maven-javadoc-plugin as
> copied below.
> - > mvn jetty:run
> Result:
> - When jetty loads, every servlet fails to load, the first is always
> java.lang.ClassNotFoundException:
> org.springframework.web.context.ContextLoaderListener followed by null
> pointers and CNFE's on every servlet.
> When i take out the execution of the maven-javadoc-plugin everything works?!
> My only guess is that when the javadoc plugin runs, it does something with
> the classpath such that when jetty runs it doesn't have what it needs to find
> all the classes correctly.
> My javadoc configuration is as follows:
> <plugin>
> <groupId>org.apache.maven.plugins</groupId>
> <artifactId>maven-javadoc-plugin</artifactId>
> <executions>
> <execution>
> <goals>
> <goal>javadoc</goal>
> </goals>
> <phase>generate-resources</phase>
> </execution>
> </executions>
> </plugin>
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