Actually, this was a typo in my post.

Below is the full output of the command.

# cpan -i Log::Log4perl
CPAN: Storable loaded ok
Going to read /root/.cpan/Metadata
  Database was generated on Thu, 16 Jul 2009 15:27:04 GMT
Going to read /root/.cpan/sources/authors/01mailrc.txt.gz
CPAN: Compress::Zlib loaded ok
Going to read /root/.cpan/sources/modules/02packages.details.txt.gz
Warning: Your /root/.cpan/sources/modules/02packages.details.txt.gz do
+es not contain a Line-Count header.
Please check the validity of the index file by comparing it to more
than one CPAN mirror. I'll continue but problems seem likely to
happen.
Warning: Your /root/.cpan/sources/modules/02packages.details.txt.gz do
+es not contain a Last-Updated header.
Please check the validity of the index file by comparing it to more
than one CPAN mirror. I'll continue but problems seem likely to
happen.
Going to read /root/.cpan/sources/modules/03modlist.data.gz
Can't locate object method "data" via package "CPAN::Modulelist" (perh
+aps you forgot to load "CPAN::Modulelist"?) at (eval 20) line 1, <FH>
+ line 20.
 at /usr/lib/perl5/5.8.8/CPAN.pm line 3405
        CPAN::Index::rd_modlist('CPAN::Index', '/root/.cpan/sources/mo
+dules/03modlist.data.gz') called at /usr/lib/perl5/5.8.8/CPAN.pm line
+ 3128
        CPAN::Index::reload('CPAN::Index') called at /usr/lib/perl5/5.
+8.8/CPAN.pm line 675
        CPAN::exists('CPAN=HASH(0x9c77f50)', 'CPAN::Module', 'Log::Log
+4perl') called at /usr/lib/perl5/5.8.8/CPAN.pm line 1841
        CPAN::Shell::expandany('CPAN::Shell', 'Log::Log4perl') called 
+at /usr/lib/perl5/5.8.8/CPAN.pm line 2077
        CPAN::Shell::rematein('CPAN::Shell', 'install', 'Log::Log4perl
+') called at /usr/lib/perl5/5.8.8/CPAN.pm line 2164
        CPAN::Shell::install('CPAN::Shell', 'Log::Log4perl') called at
+ /usr/bin/cpan line 202
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