Unable to open eclipse marketplace

I have installed eclipse kepler 64 bit on ubuntu 13.04 64 bit.

when i try to open the eclipse marketplace, i am getting following error :

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.

then i checked the log and found following :

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)

i also tried to open the url : http://marketplace.eclipse.org/catalogs/api/p

but it gives following response :

This file is part of MediaWiki and is not a valid entry point

So i am wondering why this error occurred ??

Solution

The response of http://marketplace.eclipse.org/catalogs/api/p is probably also your answer.

I'm having the same problem in Windows 7. And since i couldn't find anything on Google either i'm guessing this is a temporary problem caused by some bug at the marketplace.eclipse.org server. I've tried installing Kepler for Java programmers and the Standard edition, both return the same error when trying to access the marketplace.

Good luck.