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https://issues.apache.org/jira/browse/LUCENE-7425?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15437143#comment-15437143
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Steve Rowe commented on LUCENE-7425:
------------------------------------
The highest voted answer here
[http://askubuntu.com/questions/180581/installing-libwww-perl-on-ubuntu-12-04-se]
says that there is an Ubuntu package you have to install: {{sudo apt-get
install libwww-perl}}
Different operating system distributions choose different OOTB modules, and for
whatever reason Ubuntu doesn't include libwww-perl.
> poll-mirrors.pl requires additional perl packages?
> --------------------------------------------------
>
> Key: LUCENE-7425
> URL: https://issues.apache.org/jira/browse/LUCENE-7425
> Project: Lucene - Core
> Issue Type: Bug
> Reporter: Michael McCandless
>
> I have a newish Ubuntu 16.04.1 install ... and I'm doing the Lucene/Solr
> 6.2.0 release on it.
> Our release process is already hard enough.
> When I get to the step to poll the mirrors to see whether Maven central and
> the apache mirrors have the release bits yet, I hit this:
> {noformat}
> 14:51 $ perl ../dev-tools/scripts/poll-mirrors.pl -version 6.2.0
> perl ../dev-tools/scripts/poll-mirrors.pl -version 6.2.0
> Can't locate LWP/UserAgent.pm in @INC (you may need to install the
> LWP::UserAgent module) (@INC contains: /etc/perl
> /usr/local/lib/x86_64-linux-gnu/perl/5.22.1 /usr/local/share/perl/5.22.1
> /usr/lib/x86_64-linux-gnu/perl5/5.22 /usr/share/perl5
> /usr/lib/x86_64-linux-gnu/perl/5.22 /usr/share/perl/5.22
> /usr/local/lib/site_perl /usr/lib/x86_64-linux-gnu/perl-base .) at
> ../dev-tools/scripts/poll-mirrors.pl line 31.
> BEGIN failed--compilation aborted at ../dev-tools/scripts/poll-mirrors.pl
> line 31.
> {noformat}
> How can it be that such a trivial script would need optional perl packages
> installed? It seems all it's trying to do is download stuff over HTTP at
> this point?
> So I fire up {{cpan}}, asking it to install {{LWP/UserAgent.pm}} and it hits
> all sorts of errors that I cannot understand.
> Can we somehow simplify this script to use mere mortal perl packages? Or is
> something badly wrong with my Ubuntu install? Maybe we should rewrite this
> in a proper scripting language that has batteries included and also starts
> with P ;)
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