Internal error occurred in Eclipse Juno during Maven Project Import/Update

Question

I am using Eclipse Juno (tried SR1 & SR2) with the m2e WTP plugin installed. (I have also tried the same with just the m2e plugin) and I get the following:

An internal error occurred during: "Importing Maven projects". org/eclipse/m2e/wtp/WTPProjectsUtil

This happens when I try to import a project and also when I try to run the mvn update. Below is the image of the error:

Also, for some reason the update or import switches the project run time setting. I have configured it to WAS 8.5 with Java 7 but it switches back to 1.5 compilation level even though in my Eclipse preference from SVN it says Java 1.7. Any help will be really appreciated.

Update Below is the POM file for the Web project

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
    <groupId>com.mycomp</groupId>
    <artifactId>myproject</artifactId>
    <version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>myprojectWAR</artifactId>
<packaging>war</packaging>

<dependencies>
    <!-- dependencies here! -->
</dependencies>

<build>
    <finalName>myprojectWAR</finalName>
    <plugins>
        <plugin>
            <artifactId>maven-war-plugin</artifactId>
            <configuration>
                <webResources>
                    <resource>
                        <directory>${project.build.directory}/myprojectWAR</directory>
                    </resource>
                </webResources>
                <archive>
                    <addMavenDescriptor />
                    <manifestSections>
                        <manifestSection>
                            <name>JAX-WS engine</name>
                            <manifestEntries>
                                <DisableIBMJAXWSEngine>true</DisableIBMJAXWSEngine>
                            </manifestEntries>
                        </manifestSection>
                    </manifestSections>
                    <manifest>
                        <addDefaultImplementationEntries>true</addDefaultImplementationEntries>
                        <addDefaultSpecificationEntries>true</addDefaultSpecificationEntries>
                    </manifest>
                </archive>
            </configuration>
        </plugin>
    </plugins>
</build>

Answer 1

I got the same error after installing "WebSphere® Application Server V8.5 Tools for Juno". Updating to the latest "m2e-wtp - Maven Integration for WTP" in the eclipse marketplace solved the problem. I'm not sure if this was your problem but might help other people facing this scenario.

Answer 2

Are you using a 64 bits version of eclipse? I had the same problem until I switched back to 32 bits. I have no explanation.