如何更新eclipse,虽然无法找到某些存储库

Tho*_*mas 4 eclipse helios

一段时间以来,我想使用eclipse的更新功能.但每次都找不到一些(可能是过时的)存储库.我仍然希望其他部分更新,但这个错误只会阻止一切.

我该如何解决该问题,即修改已检查存储库的列表?代理设置肯定是正确的,因为"安装新软件"工作正常.

错误信息:

Some sites could not be found.  See the error log for more detail.
HTTP Server 'Service Unavailable': org.apache.maven/content.xml
HttpClient connection error response code 503.
No repository found at maven.apache.org.
No repository found at subclipse.tigris.org/.
No repository found at github.com/cbeust/testng-eclipse.git.
No repository found at download.eclipse.org/mat/1.0/update-site/.
No repository found at download.eclipse.org/tools/orbit/downloads/drops/R20100519200754/updateSite/.
HTTP Server 'Service Unavailable': org.apache.maven.plugins/content.xml
HttpClient connection error response code 503.
No repository found at github.com/cbeust/testng-eclipse.
No repository found at beust.com/eclipse.
Unable to read repository at dev2devclub.bea.com/updates/eclipse-3.3/wls-plugins/content.xml.
The server dev2devclub.bea.com failed to respond
Run Code Online (Sandbox Code Playgroud)

(http://和https://因超链接限制而被删除)

从关于对话框:

版本:Helios Service Release 2/Build id:20110301-1815

E-R*_*Riz 14

在"首选项"中,键入update顶部的搜索框.选择可用更新站点,您可以在那里取消选中或删除不再需要的站点.