Cannot update Eclipse WTP, Conflicting & Unsatisfied dependencies on Eclipse Juno

Question

I tried to install/update WTP on Eclipse Juno SR2 using install new software menu option, But unable to do because of the following errors,

 Cannot complete the install because of a conflicting dependency.
  Software being installed: JAX-WS Tools SDK 1.2.0.v201204151854-44-90NCHNCDLLUuYbbV5cIkz-a69OdKTaLrU6UqY (org.eclipse.jst.ws.jaxws_sdk.feature.feature.group 1.2.0.v201204151854-44-90NCHNCDLLUuYbbV5cIkz-a69OdKTaLrU6UqY)
  Software being installed: JAX-WS Tools SDK 1.2.1.v201301072322-448a90NCHQC9KRWnSadV-_Nlyb19OdKTcLlRBVpX (org.eclipse.jst.ws.jaxws_sdk.feature.feature.group 1.2.1.v201301072322-448a90NCHQC9KRWnSadV-_Nlyb19OdKTcLlRBVpX)
  Only one of the following can be installed at once: 
    JAX-WS Tools Developer Guide 1.1.100.v201301072322 (org.eclipse.jst.ws.jaxws.doc.isv 1.1.100.v201301072322)
    JAX-WS Tools Developer Guide 1.1.0.v201104031551 (org.eclipse.jst.ws.jaxws.doc.isv 1.1.0.v201104031551)
  Cannot satisfy dependency:
    From: JAX-WS Tools SDK 1.2.0.v201204151854-44-90NCHNCDLLUuYbbV5cIkz-a69OdKTaLrU6UqY (org.eclipse.jst.ws.jaxws_sdk.feature.feature.group 1.2.0.v201204151854-44-90NCHNCDLLUuYbbV5cIkz-a69OdKTaLrU6UqY)
    To: org.eclipse.jst.ws.jaxws.doc.isv [1.1.0.v201104031551]
  Cannot satisfy dependency:
    From: JAX-WS Tools SDK 1.2.1.v201301072322-448a90NCHQC9KRWnSadV-_Nlyb19OdKTcLlRBVpX (org.eclipse.jst.ws.jaxws_sdk.feature.feature.group 1.2.1.v201301072322-448a90NCHQC9KRWnSadV-_Nlyb19OdKTcLlRBVpX)
    To: org.eclipse.jst.ws.jaxws.doc.isv [1.1.100.v201301072322]

URI used : http://download.eclipse.org/webtools/repository/juno

I am updating WTP on Eclipse to install WAS Liberty Profile, When I tried to install WAS Liberty profile following error occured,

    Cannot complete the install because one or more required items could not be found.
  Software being installed: WebSphere® Application Server Liberty Profile Tools 8.5.5040.v20141119_2034 (com.ibm.websphere.wdt.server.tools.feature.group 8.5.5040.v20141119_2034)
  Missing requirement: com.ibm.wdt.preferences 1.0.1.v20141119_2034 requires 'bundle org.eclipse.wst.web [1.1.700,2.0.0)' but it could not be found


    Cannot satisfy dependency:
        From: Configuration for WebSphere® Application Server Developer Tools for Eclipse 1.0.1.v20141119_2034 (com.ibm.wdt.preferences.feature.feature.group 1.0.1.v20141119_2034)
        To: com.ibm.wdt.preferences [1.0.1.v20141119_2034]
      Cannot satisfy dependency:
        From: WebSphere® Application Server Liberty Profile Tools 8.5.5040.v20141119_2034 (com.ibm.websphere.wdt.server.tools.feature.group 8.5.5040.v20141119_2034)
        To: com.ibm.wdt.preferences.feature.feature.group [1.0.1.v20141119_2034]

Environment Details:

Eclipse version: Juno Service Release 2
Eclipse Build id: 20130225-0426
JDK used: jdk1.6.0_35

Answer 1

You need both the WTP repository and the matching simultaneous release repository, as found at https://wiki.eclipse.org/WTP_FAQ#How_do_I_install_WTP.3F . The simultaneous release repository is the more important of the two most of the time. It actually looks like the Liberty tools you're installing were intended for Kepler, and you can't do an in-place upgrade from Juno to Kepler.