Unsolved errors after installing Eclipse Neon2, buidlship, Gluon for Android applications

Question

I have installed, I think, all useful components that allow to develop some JavaFX applications dedicated to Android, with Eclipse Neon2

At this time, I can generate with this set of tools, from a Java(fx) project, an apk file for Android phone.

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The configuration is:

• Eclipse Neon2 (4.6.2)
• Maven Aether Provider Bundle 3.1.0
• Eclipse Buildship 2.0.0
• Eclipse Code recommenders Mylyn , snipmatch and UI: 2.4.5
• Eclipse EGit, JGit 4.4.1
• Eclipse MarketPlace Client 1.5.3
• Eclipse Modeling Project 2.12.0
• Eclipse Mylyn 1.13.0 and 3.21.0
• Eclipse Oomph 1.6.0
• Eclipse Packaging project 4.6.2
• Eclipse Web Tools Platform 3.8.0
• Eclipse.org JDT 3.12.2
• Eclipse.org Platform, RCP 4.6.2
• Eclipse.org Help System Base 2.2.1
• Eclipse.org m2e 1.7.0
• Android Open Source Project (ADT, Dalvik, ...) 23.0.7

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Question 1:

But some "residual" errors alway exist, as follows:

error loading hook:

org.eclipse.fx.osgi.fxloader.FXClassLoadingConfigurator
 org.eclipse.fx.osgi.fxloader.FXClassLoadingConfigurator
java.lang.NoClassDefFoundError: org/eclipse/osgi/baseadaptor/HookConfigurator
Caused by: java.lang.ClassNotFoundException: org.eclipse.osgi.baseadaptor.HookConfigurator
    at java.net.URLClassLoader.findClass(Unknown Source)
    at java.lang.ClassLoader.loadClass(Unknown Source)

org.eclipse.e4.ui.workbench

Unable to retrieve the bundle from the URI: **bundleclass**://org.eclipse.e4.tools.emf.ui/org.eclipse.e4.tools.emf.ui.internal.handlers.MarkDuplicateElementIdsHandler
ResetToDefaultHandler, MarkDuplicateLabelsHandler, ...

in org.eclipse.core.runtime:

Invalid input url:platform:/plugin/org.eclipse.pde.ui/$nl$/icons/eview16/plugins.png
java.io.IOException: Unable to resolve plug-in "platform:/plugin/org.eclipse.pde.ui/$nl$/icons/eview16/plugins.png".
    at org.eclipse.core.internal.runtime.PlatformURLPluginConnection.parse(PlatformURLPluginConnection.java:61)

in org.eclipse.mylyn.tasks.core:

Could not load repository template extension contributed by 'org.**springsource**.ide.eclipse.dashboard.ui' with connectorKind 'jira'
An exception stack trace is not available.

Have you an idea for solving them?

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Question 2:

Moreover, I am not sure that my configuration was optimized (redundancy, ...). If you have some ideas to minimize it.

Thanks a lot