[Solved]-Error when updating eclipse-eclipse

I had the same problem. After exporting and importing bookmarks, the problem did not get resolved. but I started getting error 'Connection refused'.

On further thoughts I found that my antivirus is not allowing eclipse to talk to internet. Disabling antivirus made it work.

Sandeep Jindal

I had a similar problem over the last couple months, but ignored it until I really needed PyDev to work on my laptop today.

I tried the solutions above to no avail and then I found something odd:

In (Window->Preferences->Install/Update->Available Software) I noticed that the box for 'PyDev Update Site' AND another one right below it with the location 'file:/updates' were both checked, causing a duplicate of most or all update URLs. After un-checking the box with the location 'file:/updates' I was able to update from (Help->Check for Updates) which then successfully installed the latest version of PyDev.

This solution might not be applicable to PyDev updates alone and could hopefully help others with similar issues.

I just had the same problem, I diabled my ZoneAlarm Firewall, and it connected OK!

Is there some kind of rule I need to add into my firewall to stop it blocking eclipse? It never used to do this, everything was working find until last week (Sept 25th (ish) 2012)

When I encountered a similar problem I add the following repository to my available update site. http://dist.springsource.com/release/TOOLS/update/e4.4/.

Make sure the slash in at the end of the URL.

There is a simple solution for this problem, that I tested, on https://marketplace.eclipse.org/content/ibm-websphere-mq-explorer/login-warning, just install "Eclipse Tests, Examples, and Extras" -> "Eclipse 2.0 Style Plugin Support" from The Eclipse Project Updates repository

In my case the problem was caused by having two update sites for STS of which one one obsolote and not available any more. Both were present and checked in Install/Available Software Sites.

Solution was simple: unchecking the site that was not available. Available update sites for sts are listed here: https://spring.io/tools/sts/all.

I had the same problem (well similar as I was just trying to install subclipse). VonC's tip "Other advice" did it for me.

1. Export sites to bookmarks.xml
2. Edit this file and append a forward slash at the end of every URL where it is missing.
3. Delete all sites
4. Re-import edited bookmarks.xml
5. Sigh with relief as it works.

The backslash thing in the exported bookmarks file fixed it for me.

I had the same problem with Eclipse Helios (3.6) on Ubuntu 64 bits.

Removing

http://download.eclipse.org/tools/cdt/releases/helios

from the "Available Software Sites" in Eclipse, and adding it again did the fix.

Though this question is answered a long back, wanted to share my experience thinking that it may save some one' day :)

Some times it could also be possible due to the incorrect proxy settings. In my case (Eclipse 3.6/Helios), Eclipse preference file $ECLIPSE_HOME$/configuration/.settings/org.eclipse.core.net.prefs is having proxy details,

proxyData/HTTP/hasAuth=true
systemProxiesEnabled=true
proxyData/HTTP/host=proxy.domain.net
org.eclipse.core.net.hasMigrated=true
eclipse.preferences.version=1
proxiesEnabled=true
proxyData/HTTP/port=9119
nonProxiedHosts=

When I deleted the file after closing the Eclipse, then onwards I m able to download the plugins

Yet another solution -

Instead exporting all managed sites and importing them back, click on 'edit' on each checked site and add '//' at the end

If you just add a '/' it says duplicate site therefore the '//'

How a small bug in a huge carefully architected application can be so hard to debug yet simple to solve