title: Unable to open eclipse marketplace
body: <p>I have installed eclipse kepler 64 bit on ubuntu 13.04 64 bit.</p>
  
  <p>when i try to open the eclipse marketplace, i am getting following error :</p>
  
  <pre><code>Cannot open Eclipse Marketplace
  Cannot install remote marketplace locations: Cannot complete request to http://marketplace.eclipse.org/catalogs/api/p: Content is not allowed in prolog.
  Cannot complete request to http://marketplace.eclipse.org/catalogs/api/p: Content is not allowed in prolog.
  Content is not allowed in prolog.
  Cannot complete request to http://marketplace.eclipse.org/catalogs/api/p: Content is not allowed in prolog.
  Content is not allowed in prolog.
  </code></pre>
  
  <p>then i checked the log and found following : </p>
  
  <pre><code>eclipse.buildId=4.3.0.M20130911-1000
  java.version=1.7.0_25
  java.vendor=Oracle Corporation
  BootLoader constants: OS=linux, ARCH=x86_64, WS=gtk, NL=en_IN
  Framework arguments:  -vm /usr/lib/jvm/java-7-openjdk-amd64/jre -product org.eclipse.epp.package.jee.product
  Command-line arguments:  -os linux -ws gtk -arch x86_64 -vm /usr/lib/jvm/java-7-openjdk-amd64/jre -product org.eclipse.epp.package.jee.product
  
  Error
  Sun Sep 29 20:57:29 IST 2013
  Cannot parse XML at URL http://marketplace.eclipse.org/catalogs/api/p
  
  org.xml.sax.SAXParseException; lineNumber: 1; columnNumber: 1; Content is not allowed in prolog.
      at com.sun.org.apache.xerces.internal.parsers.AbstractSAXParser.parse(AbstractSAXParser.java:1236)
      at com.sun.org.apache.xerces.internal.jaxp.SAXParserImpl$JAXPSAXParser.parse(SAXParserImpl.java:568)
      at org.eclipse.epp.internal.mpc.core.service.RemoteMarketplaceService.processRequest(RemoteMarketplaceService.java:138)
      at org.eclipse.epp.internal.mpc.core.service.RemoteMarketplaceService.processRequest(RemoteMarketplaceService.java:85)
      at org.eclipse.epp.internal.mpc.core.service.RemoteMarketplaceService.processRequest(RemoteMarketplaceService.java:72)
      at org.eclipse.epp.internal.mpc.core.service.DefaultCatalogService.listCatalogs(DefaultCatalogService.java:36)
      at org.eclipse.epp.internal.mpc.ui.commands.MarketplaceWizardCommand$5.run(MarketplaceWizardCommand.java:254)
      at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
  </code></pre>
  
  <p>i also tried to open the url : <a href="http://marketplace.eclipse.org/catalogs/api/p" rel="nofollow noreferrer">http://marketplace.eclipse.org/catalogs/api/p</a></p>
  
  <p>but it gives following response :</p>
  
  <pre><code>This file is part of MediaWiki and is not a valid entry point
  </code></pre>
  
  <p>So i am wondering why this error occurred ??</p>