Found solution:
Solution #1:
issue was with proxy in settings.xml file:
<host>webproxy</host>
to get host goto IE->tools->connection->LAN settings->advanced->http.
=====
Solution #2:
if auto configured proxy is given: then
1> open IE(or any browser)
2> get the url address from your browser through IE->Tools->internet option->connections->LAN Settings-> get address and give in url eg: as http://autocache.abc.com/ and enter, a file will be downloaded with .pac format, save to desktop
3> open .pac file in textpad, identify PROXY:
In your editor, it will come something like:
return "PROXY web-proxy.ind.abc.com:8080; PROXY proxy.sgp.abc.com:8080";
4> go to Maven settings.xml and enter as:
<proxy>
<id>optional</id>
<active>true</active>
<protocol>http</protocol>
<host>web-proxy.ind.abc.com</host>
<port>8080</port>
</proxy>
5> run mvn:install through command prompt or run through eclipse.
=====
Solution #3:
For any other issues delete maven local repository and run mvn:install again.
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