Can't access Eclipse marketplace

I can't seem to access the Eclipse marketplace. I'm using Juno 4.2. I tried deleting eclipse and removing all plugins, deleting my .metadata, and deleting the eclipse app data.

I've tried switching my default browser from firefox to chrome, I've tried turning on and completely off Windows firewall. I'm at home.

I was able to get eclipse updates, though. When I try to report a bug for the marketplace I get a different error.

When I try to connect, I receive quite a few errors.

First one is a warning:

Connection to http://marketplace.eclipse.org/catalogs/api/p failed on Connection reset. Retry attempt 0 started

Second is an error:

Cannot install remote marketplace locations.:

Third is another error:

Unexpected exception

Here are the stack traces in order received:

java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(SocketInputStream.java:189)
    at java.net.SocketInputStream.read(SocketInputStream.java:121)
    at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
    at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
    at org.apache.commons.httpclient.HttpParser.readRawLine(HttpParser.java:78)
    at org.apache.commons.httpclient.HttpParser.readLine(HttpParser.java:106)
    at org.apache.commons.httpclient.HttpConnection.readLine(HttpConnection.java:1116)
    at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionAdapter.readLine(MultiThreadedHttpConnectionManager.java:1413)
    at org.apache.commons.httpclient.HttpMethodBase.readStatusLine(HttpMethodBase.java:1973)
    at org.apache.commons.httpclient.HttpMethodBase.readResponse(HttpMethodBase.java:1735)
    at org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1098)
    at org.eclipse.ecf.provider.filetransfer.httpclient.HttpClientRetrieveFileTransfer$GzipGetMethod.execute(HttpClientRetrieveFileTransfer.java:120)
    at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:398)
    at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
    at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
    at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:346)
    at org.eclipse.ecf.provider.filetransfer.httpclient.HttpClientRetrieveFileTransfer.performConnect(HttpClientRetrieveFileTransfer.java:1129)
    at org.eclipse.ecf.provider.filetransfer.httpclient.HttpClientRetrieveFileTransfer.openStreams(HttpClientRetrieveFileTransfer.java:699)
    at org.eclipse.ecf.provider.filetransfer.retrieve.AbstractRetrieveFileTransfer.sendRetrieveRequest(AbstractRetrieveFileTransfer.java:879)
    at org.eclipse.ecf.provider.filetransfer.retrieve.AbstractRetrieveFileTransfer.sendRetrieveRequest(AbstractRetrieveFileTransfer.java:570)
    at org.eclipse.ecf.provider.filetransfer.retrieve.MultiProtocolRetrieveAdapter.sendRetrieveRequest(MultiProtocolRetrieveAdapter.java:106)
    at org.eclipse.equinox.internal.p2.transport.ecf.FileReader.sendRetrieveRequest(FileReader.java:422)
    at org.eclipse.equinox.internal.p2.transport.ecf.FileReader.read(FileReader.java:273)
    at org.eclipse.equinox.internal.p2.transport.ecf.RepositoryTransport.stream(RepositoryTransport.java:172)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.eclipse.epp.internal.mpc.core.util.AbstractP2TransportFactory.invokeStream(AbstractP2TransportFactory.java:35)
    at org.eclipse.epp.internal.mpc.core.util.TransportFactory$1.stream(TransportFactory.java:69)
    at org.eclipse.epp.internal.mpc.core.service.RemoteMarketplaceService.processRequest(RemoteMarketplaceService.java:141)
    at org.eclipse.epp.internal.mpc.core.service.RemoteMarketplaceService.processRequest(RemoteMarketplaceService.java:80)
    at org.eclipse.epp.internal.mpc.core.service.DefaultCatalogService.listCatalogs(DefaultCatalogService.java:36)
    at org.eclipse.epp.internal.mpc.ui.commands.MarketplaceWizardCommand$3.run(MarketplaceWizardCommand.java:200)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)


java.lang.reflect.InvocationTargetException
    at org.eclipse.epp.internal.mpc.ui.commands.MarketplaceWizardCommand$3.run(MarketplaceWizardCommand.java:203)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)
Caused by: org.eclipse.core.runtime.CoreException: Unable to read repository at http://marketplace.eclipse.org/catalogs/api/p.
    at org.eclipse.equinox.internal.p2.transport.ecf.RepositoryTransport.stream(RepositoryTransport.java:181)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.eclipse.epp.internal.mpc.core.util.AbstractP2TransportFactory.invokeStream(AbstractP2TransportFactory.java:35)
    at org.eclipse.epp.internal.mpc.core.util.TransportFactory$1.stream(TransportFactory.java:69)
    at org.eclipse.epp.internal.mpc.core.service.RemoteMarketplaceService.processRequest(RemoteMarketplaceService.java:141)
    at org.eclipse.epp.internal.mpc.core.service.RemoteMarketplaceService.processRequest(RemoteMarketplaceService.java:80)
    at org.eclipse.epp.internal.mpc.core.service.DefaultCatalogService.listCatalogs(DefaultCatalogService.java:36)
    at org.eclipse.epp.internal.mpc.ui.commands.MarketplaceWizardCommand$3.run(MarketplaceWizardCommand.java:200)
    ... 1 more
Caused by: java.net.SocketException: Connection reset
    at java.net.SocketInputStream.read(SocketInputStream.java:189)
    at java.net.SocketInputStream.read(SocketInputStream.java:121)
    at java.io.BufferedInputStream.fill(BufferedInputStream.java:235)
    at java.io.BufferedInputStream.read(BufferedInputStream.java:254)
    at org.apache.commons.httpclient.HttpParser.readRawLine(HttpParser.java:78)
    at org.apache.commons.httpclient.HttpParser.readLine(HttpParser.java:106)
    at org.apache.commons.httpclient.HttpConnection.readLine(HttpConnection.java:1116)
    at org.apache.commons.httpclient.MultiThreadedHttpConnectionManager$HttpConnectionAdapter.readLine(MultiThreadedHttpConnectionManager.java:1413)
    at org.apache.commons.httpclient.HttpMethodBase.readStatusLine(HttpMethodBase.java:1973)
    at org.apache.commons.httpclient.HttpMethodBase.readResponse(HttpMethodBase.java:1735)
    at org.apache.commons.httpclient.HttpMethodBase.execute(HttpMethodBase.java:1098)
    at org.eclipse.ecf.provider.filetransfer.httpclient.HttpClientRetrieveFileTransfer$GzipGetMethod.execute(HttpClientRetrieveFileTransfer.java:120)
    at org.apache.commons.httpclient.HttpMethodDirector.executeWithRetry(HttpMethodDirector.java:398)
    at org.apache.commons.httpclient.HttpMethodDirector.executeMethod(HttpMethodDirector.java:171)
    at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:397)
    at org.apache.commons.httpclient.HttpClient.executeMethod(HttpClient.java:346)
    at org.eclipse.ecf.provider.filetransfer.httpclient.HttpClientRetrieveFileTransfer.performConnect(HttpClientRetrieveFileTransfer.java:1129)
    at org.eclipse.ecf.provider.filetransfer.httpclient.HttpClientRetrieveFileTransfer.openStreams(HttpClientRetrieveFileTransfer.java:699)
    at org.eclipse.ecf.provider.filetransfer.retrieve.AbstractRetrieveFileTransfer.sendRetrieveRequest(AbstractRetrieveFileTransfer.java:879)
    at org.eclipse.ecf.provider.filetransfer.retrieve.AbstractRetrieveFileTransfer.sendRetrieveRequest(AbstractRetrieveFileTransfer.java:570)
    at org.eclipse.ecf.provider.filetransfer.retrieve.MultiProtocolRetrieveAdapter.sendRetrieveRequest(MultiProtocolRetrieveAdapter.java:106)
    at org.eclipse.equinox.internal.p2.transport.ecf.FileReader.sendRetrieveRequest(FileReader.java:422)
    at org.eclipse.equinox.internal.p2.transport.ecf.FileReader.read(FileReader.java:273)
    at org.eclipse.equinox.internal.p2.transport.ecf.RepositoryTransport.stream(RepositoryTransport.java:172)
    ... 11 more


java.lang.reflect.InvocationTargetException
    at org.eclipse.jface.operation.ModalContext.run(ModalContext.java:421)
    at org.eclipse.jface.wizard.WizardDialog.run(WizardDialog.java:1028)
    at org.eclipse.equinox.internal.p2.ui.discovery.wizards.CatalogViewer.updateCatalog(CatalogViewer.java:563)
    at org.eclipse.epp.internal.mpc.ui.wizards.MarketplaceViewer.updateCatalog(MarketplaceViewer.java:453)
    at org.eclipse.epp.internal.mpc.ui.wizards.MarketplacePage$6.run(MarketplacePage.java:332)
    at org.eclipse.swt.widgets.RunnableLock.run(RunnableLock.java:35)
    at org.eclipse.swt.widgets.Synchronizer.runAsyncMessages(Synchronizer.java:135)
    at org.eclipse.swt.widgets.Display.runAsyncMessages(Display.java:4144)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3761)
    at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
    at org.eclipse.jface.window.Window.open(Window.java:801)
    at org.eclipse.epp.internal.mpc.ui.commands.MarketplaceWizardCommand.execute(MarketplaceWizardCommand.java:171)
    at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:290)
    at org.eclipse.ui.internal.handlers.E4HandlerProxy.execute(E4HandlerProxy.java:76)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.eclipse.e4.core.internal.di.MethodRequestor.execute(MethodRequestor.java:56)
    at org.eclipse.e4.core.internal.di.InjectorImpl.invokeUsingClass(InjectorImpl.java:229)
    at org.eclipse.e4.core.internal.di.InjectorImpl.invoke(InjectorImpl.java:210)
    at org.eclipse.e4.core.contexts.ContextInjectionFactory.invoke(ContextInjectionFactory.java:131)
    at org.eclipse.e4.core.commands.internal.HandlerServiceImpl.executeHandler(HandlerServiceImpl.java:171)
    at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.executeItem(HandledContributionItem.java:814)
    at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.handleWidgetSelection(HandledContributionItem.java:707)
    at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem.access$7(HandledContributionItem.java:691)
    at org.eclipse.e4.ui.workbench.renderers.swt.HandledContributionItem$4.handleEvent(HandledContributionItem.java:630)
    at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
    at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
    at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4169)
    at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3758)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine$9.run(PartRenderingEngine.java:1029)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.e4.ui.internal.workbench.swt.PartRenderingEngine.run(PartRenderingEngine.java:923)
    at org.eclipse.e4.ui.internal.workbench.E4Workbench.createAndRunUI(E4Workbench.java:86)
    at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:588)
    at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
    at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:543)
    at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
    at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:124)
    at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
    at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:353)
    at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:180)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:601)
    at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:629)
    at org.eclipse.equinox.launcher.Main.basicRun(Main.java:584)
    at org.eclipse.equinox.launcher.Main.run(Main.java:1438)
Caused by: java.lang.IllegalStateException
    at org.eclipse.equinox.internal.p2.discovery.Catalog.performDiscovery(Catalog.java:64)
    at org.eclipse.epp.internal.mpc.ui.catalog.MarketplaceCatalog.performDiscovery(MarketplaceCatalog.java:255)
    at org.eclipse.equinox.internal.p2.ui.discovery.wizards.CatalogViewer$6.run(CatalogViewer.java:569)
    at org.eclipse.jface.operation.ModalContext$ModalContextThread.run(ModalContext.java:121)

Solution

Considering this as a general programming problem, some possible causes are:

The service could be temporarily broken
You could have a problem with a firewall. These could be local or they could be implemented by your ISPs.
Your proxy HTTP settings (if you need one) could be incorrect. This Answer explains how to adjust the Eclipse-internal proxy settings ... if that is where the problem lies.
It is possible that your access may be blocked by over-active antivirus software.
The service could have blacklisted some net range and your hosts IP address is "collateral damage".

Try connecting to that URL with a web browser to try to see if it is just Eclipse that is affected ... or a broader problem.

Considering this in the context of the Eclipse Marketplace service, first address any local proxy / firewall / AV issues, if they apply. If that doesn't help, the best thing that you can do is to be patient.

It has been observed that the Eclipse Marketplace service does sometimes go down. It doesn't happen often, and when it does happen the problem does get fixed relatively quickly. (Hours, not days ...)
I can't find a "service status" page or feed or similar for the Eclipse services. (If you know of one, please add it as a comment below.)
There may be an "outage" notice on the Eclipse front page. Check for that.
Try to connect to the service URL (refer to the exception message!) using a web browser and/or from other locations. If you succeed, the real problem may be a networking issue at your end.
If you feel the need to complain about Eclipse's services, please don't do it here!! (It is off topic.)