问Maven Cargo插件:尽管有watchdog，目标"undeploy“还是失败了

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<plugins>
    <plugin>
        <groupId>org.codehaus.cargo</groupId>
        <artifactId>cargo-maven2-plugin</artifactId>
        <version>1.4.8</version>
        <dependencies>
            <dependency>
                <groupId>org.jboss.as</groupId>
                <artifactId>jboss-as-controller-client</artifactId>
                <version>7.1.0.Final</version>
            </dependency>
        </dependencies>
        <configuration>
            <cargo.logging>high</cargo.logging>
            <container>
                <timeout>300000</timeout>
                <containerId>jboss71x</containerId>
                <type>remote</type>
            </container>
            <configuration>
                <type>runtime</type>
                <properties>
                    <cargo.hostname><myHost></cargo.hostname>
                    <cargo.jboss.management-native.port>9999</cargo.jboss.management-native.port>
                    <cargo.remote.username><myUsername></cargo.remote.username>
                    <cargo.remote.password><myPassword></cargo.remote.password>
                </properties>
            </configuration>
            <deployer>
                <type>remote</type>
            </deployer>
            <deployables>
                <deployable>
                    <groupId><myGroupId></groupId>
                    <artifactId><myArtifactId></artifactId>
                    <type>war</type>
                    <properties>
                        <context><myContext></context>
                    </properties>
                    <location>${project.build.directory}\${project.build.finalName}.${project.packaging}</location>
                    <pingURL><myPingUrl></pingURL>
                    <pingTimeout>60000</pingTimeout>
                </deployable>
            </deployables>
        </configuration>
        <executions>
            <execution>
                <id>undeploy</id>
                <phase>pre-clean</phase>
                <goals>
                    <goal>undeploy</goal>
                </goals>
            </execution>
            <execution>
                <id>deploy</id>
                <phase>install</phase>
                <goals>
                    <goal>deploy</goal>
                </goals>
            </execution>
        </executions>
    </plugin>
</plugins>