[optimad]

Hi,

Currently using MyEclipse 10.1. I’ve got a Maven project with a src/test source folder as well as another called src/scratch. This is designed for ad hoc helper classes and the like – not strictly ‘test’ classes.

I get compilation warnings when I deliberately introduce errors (which makes it look like it’s working), but when I try and run the class as a java app, I get java.lang.NoClassDefFoundError.

My classpath is like this:

<classpath>
<classpathentry kind=”src” path=”src/main/java” including=”**/*” output=”target/classes” />
<classpathentry kind=”src” path=”src/main/resources” including=”**/*” output=”target/classes” />
<classpathentry kind=”src” path=”src/test/java” including=”**/*” output=”target/test-classes” />
<classpathentry kind=”src” path=”src/test/resources” including=”**/*” output=”target/test-classes” />
<classpathentry kind=”src” path=”src/scratch/java” including=”**/*” output=”target/test-classes” />
<classpathentry kind=”con” path=”org.eclipse.jdt.launching.JRE_CONTAINER/org.eclipse.jdt.internal.debug.ui.launcher.StandardVMType/J2SE-1.5″/>
<classpathentry kind=”con” path=”org.eclipse.m2e.MAVEN2_CLASSPATH_CONTAINER”/>
<classpathentry kind=”con” path=”org.maven.ide.eclipse.MAVEN2_CLASSPATH_CONTAINER”/>
<classpathentry kind=”output” path=”target/classes”/>
</classpath>

And the <build> section of my pom is like this:

<build>
<resources>
<resource>
<directory>src/main/java</directory>
<includes><include>**/*.*</include></includes>
</resource>
<resource>
<directory>src/main/resources</directory>
<includes><include>**/*.*</include></includes>
</resource>
</resources>
<testResources>
<testResource>
<directory>src/test/java</directory>
<includes><include>**/*.*</include></includes>
</testResource>
<testResource>
<directory>src/test/resources</directory>
<includes><include>**/*.*</include></includes>
</testResource>
<testResource>
<directory>src/scratch/java</directory>
<includes><include>**/*.*</include></includes>
</testResource>
</testResources>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>2.3.2</version>
<configuration>
<source>1.5</source>
<target>1.5</target>
<encoding>UTF-8</encoding>
</configuration>
</plugin>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-jar-plugin</artifactId>
<version>2.3.1</version>
<executions>
<execution>
<goals>
<goal>test-jar</goal>
</goals>
</execution>
</executions>
</plugin>
</plugins>
</build>

Why isn’t it picking up the compiled class? I can see the java and class files in target/test-class, so it _looks_ to be working.

What am I missing?!?

Thanks in advance

Matt

[support-joy]

Matt,

Sorry to hear you are running into “java.lang.NoClassDefFoundError”. This usually means that your classpath is not set correctly. Could you provide below details –
1. Open MyEclipse IDE, from menu options click on MyEclipse > Installation Summary > Installation Details > [Copy to Clipboard] and paste the same here
2. Clear your .log file located at [your workspace dir]/.metadata/.log, replicate the issue and attach file here.
3. Attach a screenshot of target/test-class
4. Check your deployment policies here – Window > preferences > MyEclipse > Java Enterprise Project > EAR/EJB/Web Project. Check the Library Deployment Policies(You could look under deployment tab).

[optimad]

Hi Joy,

Thanks for the reply:

2) Nothing additional went into the .log file once cleared
3) This contains a whole set of folders, including one which contains (a few levels down) my test and scratch java and class files
4) The workspace default is “Smart deployment” and all Library Deployment policies are ticked
1) Installation Details:
*** Date:
Friday, 13 April 2012 12:59:45 o’clock BST

*** System properties:
OS=WindowsVista
OS version=6.1.0
OS arch=x86
Profile arch=x86
Window system=win32
Java version=1.6.0_13
Workspace=file:/C:/dev/workspaces/10_1/
VM Args=-Xmx512m
-XX:MaxPermSize=256m
-XX:ReservedCodeCacheSize=64m
-Dosgi.nls.warnings=ignore
-Djava.class.path=C:\PROGRA~1\Genuitec\Profiles\MYECLI~1.1\../../Common/plugins/ORB7B5~1.JAR

*** Subscription information
Product Id: E3MP (MyEclipse Professional Subscription)
License version: 3.0
Full Maintenance Included
Subscription expiration date (YYYYMMDD): 20130201
Number of users: 2

*** Eclipse details:
MyEclipse Enterprise Workbench

Version: 10.1
Build id: 10.1-20120316

Blueprint: MyEclipse 10

com.genuitec.myeclipse.database – 10.1.0.me201203170059
com.genuitec.myeclipse.desktop – 10.1.0.me201203170059
com.genuitec.myeclipse.editor – 10.1.0.me201203170059
com.genuitec.myeclipse.enterprise.workbench – 10.1.0.me201203170059
com.genuitec.myeclipse.geronimo – 10.1.0.me201203170059
com.genuitec.myeclipse.glassfish – 10.1.0.me201203170059
com.genuitec.myeclipse.icefaces.feature – 10.1.0.me201203170059
com.genuitec.myeclipse.iedebugger – 10.1.0.me201203170059
com.genuitec.myeclipse.imageeditor – 10.1.0.me201203170059
com.genuitec.myeclipse.jboss – 10.1.0.me201203170059
com.genuitec.myeclipse.jetty – 10.1.0.me201203170059
com.genuitec.myeclipse.jonas – 10.1.0.me201203170059
com.genuitec.myeclipse.jrun – 10.1.0.me201203170059
com.genuitec.myeclipse.jsf – 10.1.0.me201203170059
com.genuitec.myeclipse.matisse – 10.1.0.me201203170059
com.genuitec.myeclipse.maven – 10.1.0.me201203170059
com.genuitec.myeclipse.oracle – 10.1.0.me201203170059
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com.genuitec.myeclipse.persistence – 10.1.0.me201203170059
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com.genuitec.myeclipse.resin – 10.1.0.me201203170059
com.genuitec.myeclipse.struts – 10.1.0.me201203170059
com.genuitec.myeclipse.sun – 10.1.0.me201203170059
com.genuitec.myeclipse.tomcat – 10.1.0.me201203170059
com.genuitec.myeclipse.uml2 – 10.1.0.me201203170059
com.genuitec.myeclipse.visualvm – 10.1.0.me201203170059
com.genuitec.myeclipse.visualvm.server – 10.1.0.me201203170059
com.genuitec.myeclipse.weblogic – 10.1.0.me201203170059
com.genuitec.myeclipse.websphere – 10.1.0.me201203170059
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org.eclipse.birt – 2.6.1.me201203170059
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org.eclipse.datatools.sqldevtools.feature – 1.9.0.me201203170059
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org.eclipse.graphiti.feature – 0.8.0.v20110607-1252
org.eclipse.jpt.jpa.feature – 3.0.0.me201203170059
org.eclipse.jpt.jpadiagrameditor.feature – 1.0.0.me201203170059
org.eclipse.jst.common.fproj.enablement.jdt – 3.3.0.me201203170059
org.eclipse.jst.enterprise_ui.feature – 3.3.0.me201203170059
org.eclipse.jst.server_adapters.ext.feature – 3.3.0.me201203170059
org.eclipse.jst.server_adapters.feature – 3.2.100.me201203170059
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org.eclipse.wst.common.fproj – 3.3.0.me201203170059
org.eclipse.wst.server_adapters.feature – 3.2.100.me201203170059
org.eclipse.xsd – 2.7.0.v20110606-0949
org.springframework.ide.eclipse.feature – 2.7.1.me201203170059

com.thoughtworks.twist – 2.4.0.12641-3bffc171c71291
fr.obeo.acceleo.bridge.feature – 2.6.0.200906261742
org.eclipse.cvs – 1.3.100.v20110520-0800-7B78FHl9VF7BD7KBM4GP9C
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org.eclipse.equinox.p2.user.ui – 2.1.2.R37x_v20110815-1155-6-Bk8pYWZz0qUTX5I15GZWwbXkrl
org.eclipse.help – 1.3.0.v20110530-0844-7i7uFFmFFl8nvqbDpEqTvx
org.eclipse.jdt – 3.7.2.v20120120-1414-7z8gFcuFMP7BW5XTz0jLTnz0l9B1
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org.tigris.subversion.clientadapter.feature – 1.6.12
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Eclipse startup command=-os
win32
-ws
win32
-arch
x86
-showsplash
-launcher
C:\Program Files\Genuitec\Profiles\MyEclipse 10.1\myeclipse.exe
-name
Myeclipse
–launcher.library
C:\Program Files\Genuitec\Profiles\MyEclipse 10.1\../../Common/plugins/org.eclipse.equinox.launcher.i18n.win32.win32.x86_4.2.0.v201201111650\eclipse_4201.dll
-startup
C:\Program Files\Genuitec\Profiles\MyEclipse 10.1\../../Common/plugins/org.eclipse.equinox.launcher_1.2.0.v20110502.jar
-install
C:\Program Files\Genuitec\Profiles\MyEclipse 10.1
-configuration
C:\Program Files\Genuitec\Profiles\MyEclipse 10.1\configuration
-vm
C:\Program Files\Genuitec\Common\binary\com.sun.java.jdk.win32.x86_1.6.0.013\jre\bin\client\jvm.dll

[optimad]

Hi

I’ve created a mini-project to test this and have discovered that if I direct my src/scratch/java to “test-classes” in the classpath, it fails (NoClassDefFoundError). If I direct to the default ”classes”, it works. If I direct to “scratch-classes” the compiled classes do go there, but I still get NoClassDefFoundError.

1) What is controlling this and is there any way around it?

2) Should I even care? We’re using Maven to build our artefacts/deployments so the Eclipse compilation & deployment directories are probably irrelevant.

3) In that case, should I just direct my test/java and test/resources to “classes” too?

Thanks for your help.

Matt

[support-joy]

Matt,

I am afraid, we could not replicate your issue here. Please explain how are you trying to execute the application and which class has the static main method. I need to see the full stack trace message to investigate. Please copy and paste the same here.

[optimad]

Hi Joy,

I’ve posted the test project I created.

I was using Right-click (on the class), Run as, Java Application.

This then gives this in the console:

java.lang.NoClassDefFoundError: test/test/AppScratch
Exception in thread “main”

Matt

Attachments:

You must be logged in to view attached files.

[optimad]

Hi Joy,

Any news on this?

I’m not sure I can give you any more info. Is there anything missing that you need?

Regards

Matt

[support-tony]

Matt,

Sorry for the delay in responding. We had been looking at this but didn’t complete our investigation.

We could replicate the problem, with your test case (thanks). The problem also occurs with the m2eclipse plug-in, which provides the base functionality for our maven support. It seems that extra output folders are ignored for maven projects, though not for standard Java projects. I’ve raised a bug report for this.

However, in your case, as you use maven as your primary build tool, you can work around the issue in the way you suggest, by directing the output for scratch classes at the default output folder (target/classes, in the case of the test project you provided). You can also create a run configuration, for the class you wish to execute, and add the scratch-classes folder to the classpath, in that configuration.

I notice that the pom in your test project makes no reference to the extra source folder, though the first pom you posted did. I’m not sure that referencing it would make any difference but, presumably, you wouldn’t normally include scratch classes in your production pom.

I hope this helps and sorry for the inconvenience.

[Author]

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