AspectJ Plugin throws UnsupportedOperationException
---------------------------------------------------
Key: MOJO-200
URL: http://jira.codehaus.org/browse/MOJO-200
Project: Mojo
Type: Bug
Components: aspectj
Environment: Maven 2.0.1
Windows XP Pro SP2
Reporter: Ralf Quebbemann
AspectJ plugin throws UnsupportedOperationException when executing the command:
mvn clean install site
[INFO] [aspectj:compile {execution: default}]
[INFO] Starting compiling aspects
[INFO]
----------------------------------------------------------------------------
[ERROR] FATAL ERROR
[INFO]
----------------------------------------------------------------------------
[INFO] null
[INFO]
----------------------------------------------------------------------------
[INFO] Trace
java.lang.UnsupportedOperationException
at
java.util.Collections$UnmodifiableCollection.addAll(Collections.java:1028)
at
org.codehaus.mojo.aspectj.AbstractAjcMojo.createClassPath(AbstractAjcMojo.java:121)
at
org.codehaus.mojo.aspectj.AbstractAjcCompiler.execute(AbstractAjcCompiler.java:58)
at
org.apache.maven.plugin.DefaultPluginManager.executeMojo(DefaultPluginManager.java:432)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:530)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:47
2)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.forkProjectLifecycle(DefaultLifecycleExecutor.java:858)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.forkLifecycle(DefaultLifecycleExecutor.java:729)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoals(DefaultLifecycleExecutor.java:521)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalWithLifecycle(DefaultLifecycleExecutor.java:47
2)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoal(DefaultLifecycleExecutor.java:451)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeGoalAndHandleFailures(DefaultLifecycleExecutor.jav
a:303)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.executeTaskSegments(DefaultLifecycleExecutor.java:270)
at
org.apache.maven.lifecycle.DefaultLifecycleExecutor.execute(DefaultLifecycleExecutor.java:139)
at org.apache.maven.DefaultMaven.doExecute(DefaultMaven.java:322)
at org.apache.maven.DefaultMaven.execute(DefaultMaven.java:115)
at org.apache.maven.cli.MavenCli.main(MavenCli.java:249)
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:585)
at org.codehaus.classworlds.Launcher.launchEnhanced(Launcher.java:315)
at org.codehaus.classworlds.Launcher.launch(Launcher.java:255)
at org.codehaus.classworlds.Launcher.mainWithExitCode(Launcher.java:430)
at org.codehaus.classworlds.Launcher.main(Launcher.java:375)
[INFO]
----------------------------------------------------------------------------
[INFO] Total time: 18 seconds
[INFO] Finished at: Fri Dec 30 09:49:50 CET 2005
[INFO] Final Memory: 15M/27M
[INFO]
----------------------------------------------------------------------------
It seems to be a problem when creating the classpath. I changed the following
method in "AbstractAjcMojo"
protected String createClassPath()
{
String cp = new String();
Set classPathElements = project.getDependencyArtifacts();
classPathElements.addAll(project.getArtifacts());
Iterator iter = classPathElements.iterator();
...
}
Replaced with:
protected String createClassPath()
{
String cp = new String();
Set classPathElements = Collections.synchronizedSet(new
TreeSet(project.getDependencyArtifacts()));
classPathElements.addAll(project.getArtifacts());
Iterator iter = classPathElements.iterator();
...
}
This change fixes the problem.
Seems to me, that multiple threads are accessing the set concurrently.
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