java - Eclipse 3.5 Unable to install plugins

Question

I really don't know what's going on with Eclipse 3.5 (3.5.0 or 3.5.1, same issues), but it's been now 2 days that I'm struggling with Eclipse to find a way to make the plugins installation work via the "Install New Software screen"!!! I have visited a lot of forums and blogs, tried many solutions but in vain: each time the current problem disappears and a new one appears.

I'm trying to make it work at my office, so behind proxy. The best advice I got so far is the one regarding the known issue with NTLM proxies: http://wiki.eclipse.org/ECF_Filetransfer_Support_for_NTLMv2_Proxies. I put in place the hint, but now I have a new error message: Eclipse cannot find the repositories at all... For instance here is what I get now with the Galileo update site itself:

org.eclipse.equinox.internal.provisional.p2.core.ProvisionException: No repository found at http://download.eclipse.org/releases/galileo.
    at org.eclipse.equinox.internal.p2.repository.helpers.AbstractRepositoryManager.fail(AbstractRepositoryManager.java:380)
    at org.eclipse.equinox.internal.p2.repository.helpers.AbstractRepositoryManager.loadRepository(AbstractRepositoryManager.java:606)
    at org.eclipse.equinox.internal.p2.metadata.repository.MetadataRepositoryManager.loadRepository(MetadataRepositoryManager.java:92)
    at org.eclipse.equinox.internal.p2.metadata.repository.MetadataRepositoryManager.loadRepository(MetadataRepositoryManager.java:88)
    at org.eclipse.equinox.internal.provisional.p2.ui.operations.ProvisioningUtil.loadMetadataRepository(ProvisioningUtil.java:88)
    at org.eclipse.equinox.internal.provisional.p2.ui.QueryableMetadataRepositoryManager.doLoadRepository(QueryableMetadataRepositoryManager.java:55)
    at org.eclipse.equinox.internal.provisional.p2.ui.QueryableRepositoryManager.loadRepository(QueryableRepositoryManager.java:195)
    at org.eclipse.equinox.internal.provisional.p2.ui.QueryableRepositoryManager.loadAll(QueryableRepositoryManager.java:108)
    at org.eclipse.equinox.internal.p2.ui.sdk.PreloadingRepositoryHandler$2.run(PreloadingRepositoryHandler.java:71)
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)

Samething with http://download.eclipse.org/eclipse/updates/3.5, or http://download.eclipse.org/tools/mylyn/update/e3.4/ and whatever the site: no one works.

Please somebody help!

PS: Some more details below:

I have the same issue with third party software too... for instance: http://www.epic-ide.org/updates/testing/site.xml.... same error message.

If I go to Preferences > Install / Updates > Available Software Sites, click on whatever the site and on Test Connection I get a ProvisionException with this error message (when I click on details):

Unable to read repository at http://download.eclipse.org/technology/epp/packages/galileo/site.xml. Unable to read repository at http://download.eclipse.org/technology/epp/packages/galileo/site.xml. Server redirected too many times (20)

the solution is: add following lines to your eclipse.ini file (before -vmargs): (verified on 3.5 ; 3.5.1; 3.6.2)

-Dorg.eclipse.ecf.provider.filetransfer.excludeContributors=org.eclipse.ecf.provider.filetransfer.httpclient
-Dhttp.proxyPort=8080
-Dhttp.proxyHost=myproxy
-Dhttp.proxyUser=mydomainmyusername
-Dhttp.proxyPassword=mypassword
-Dhttp.nonProxyHosts=localhost|127.0.0.1

Answer 1

Use the following setting and you will be all set. Go to Window --> Preference --> General --> Network Connection --> select Direct from drop down