CPAN Perl modules installer not finding tar file

Question

It seems I have a configuration problem when installing Perl modules through CPAN and I don't know how to correct it:

[root@ip JESSE]# pwd
/root/.cpan/sources/authors/id/J/JE/JESSE

[root@ip JESSE]# ls -l
total 240
-rw-r--r-- 1 root root 105464 Feb 20 11:39 CHECKSUMS
-rw-r--r-- 1 root root   9223 Apr 12  2011 Locale-Maketext-Simple-0.21.tar.gz
-rw-r--r-- 1 root root 125483 Feb 20 11:39 WWW-Mechanize-1.72.tar.gz

[root@ip JESSE]# cpan -i WWW::Mechanize
CPAN: Storable loaded ok (v2.20)
Reading '/root/.cpan/Metadata'
  Database was generated on Mon, 20 Feb 2012 11:10:26 GMT
Running install for module 'WWW::Mechanize'
Running make for J/JE/JESSE/WWW-Mechanize-1.72.tar.gz
CPAN: Digest::SHA loaded ok (v5.61)
CPAN: Compress::Zlib loaded ok (v2.033)
Checksum for /root/.cpan/sources/authors/id/J/JE/JESSE/WWW-Mechanize-1.72.tar.gz ok
CPAN: Archive::Tar loaded ok (v1.82)
Uncompressed /root/.cpan/sources/authors/id/J/JE/JESSE/WWW-Mechanize-1.72.tar.gz successfully
Using Tar:/bin/tar xvf "WWW-Mechanize-1.72.tar":
Couldn't untar WWW-Mechanize-1.72.tar
CPAN: File::Temp loaded ok (v0.22)
CPAN: CPAN::Meta loaded ok (v2.112150)
Package seems to come without Makefile.PL.
  (The test -f "/root/.cpan/build/JESSE-n72IRU/Makefile.PL" returned false.)
  Writing one on our own (setting NAME to WWWMechanize)
  Had problems unarchiving. Please build manually
Running make test
  Make had some problems, won't test
Running make install
  Make had some problems, won't install

[root@ip JESSE]# ls -l
total 240
-rw-r--r-- 1 root root 105464 Feb 20 11:39 CHECKSUMS
-rw-r--r-- 1 root root   9223 Apr 12  2011 Locale-Maketext-Simple-0.21.tar.gz
-rw-r--r-- 1 root root 125483 Feb 20 11:39 WWW-Mechanize-1.72.tar.gz

[root@ip JESSE]# which tar
/bin/tar

[root@ip JESSE]# which gzip
/bin/gzip

The problem seems to be here:

Uncompressed /root/.cpan/sources/authors/id/J/JE/JESSE/WWW-Mechanize-1.72.tar.gz successfully
Using Tar:/bin/tar xvf "WWW-Mechanize-1.72.tar":
Couldn't untar WWW-Mechanize-1.72.tar

The tar.gz file is indeed uncompressed and can be found here in a new directory:

/root/.cpan/build/JESSE-KjCEMS/WWW-Mechanize-1.72.tar

If I run the same command from inside the shell, I get some more info:

cpan[1]> install WWW::Mechanize
CPAN: Storable loaded ok (v2.20)
Reading '/root/.cpan/Metadata'
  Database was generated on Mon, 20 Feb 2012 11:10:26 GMT
Running install for module 'WWW::Mechanize'
Running make for J/JE/JESSE/WWW-Mechanize-1.72.tar.gz
CPAN: Digest::SHA loaded ok (v5.61)
CPAN: Compress::Zlib loaded ok (v2.033)
Checksum for /root/.cpan/sources/authors/id/J/JE/JESSE/WWW-Mechanize-1.72.tar.gz ok
Scanning cache /root/.cpan/build for sizes
Use of uninitialized value $newdir in substitution (s///) at /usr/lib64/perl5/Cwd.pm line 502.
Use of uninitialized value $newdir in chdir at /usr/lib64/perl5/Cwd.pm line 510.
Use of chdir('') or chdir(undef) as chdir() is deprecated at /usr/lib64/perl5/Cwd.pm line 510.
Use of uninitialized value $newdir in pattern match (m//) at /usr/lib64/perl5/Cwd.pm line 525.
Use of uninitialized value $newdir in split at /usr/lib64/perl5/Cwd.pm line 531.
..........................................................................--DONE
DEL(1/10): /root/.cpan/build/CPAN-1.9600-jGTV10
DEL(2/10): /root/.cpan/build/File-Which-1.09-yoVWZC
DEL(3/10): /root/.cpan/build/Test-Script-1.07-aJWrXb
DEL(4/10): /root/.cpan/build/Probe-Perl-0.01-gzZ2eR
DEL(5/10): /root/.cpan/build/IPC-Run3-0.044-AP6EMp
DEL(6/10): /root/.cpan/build/Time-HiRes-1.9721-xxseE6
DEL(7/10): /root/.cpan/build/CPAN-Meta-YAML-0.003-wGtH0a
DEL(8/10): /root/.cpan/build/JSON-PP-2.27105-fvkwNa
DEL(9/10): /root/.cpan/build/Package-Constants-0.02-7Ms_OL
DEL(10/10): /root/.cpan/build/Module-Metadata-1.000004-tXKIBB
CPAN: Archive::Tar loaded ok (v1.82)
Uncompressed /root/.cpan/sources/authors/id/J/JE/JESSE/WWW-Mechanize-1.72.tar.gz successfully
Using Tar:/bin/tar xvf "WWW-Mechanize-1.72.tar":
Couldn't untar WWW-Mechanize-1.72.tar
CPAN: File::Temp loaded ok (v0.22)
CPAN: CPAN::Meta loaded ok (v2.112150)
Package seems to come without Makefile.PL.
  (The test -f "/root/.cpan/build/JESSE-DGrTh_/Makefile.PL" returned false.)
  Writing one on our own (setting NAME to WWWMechanize)
  Had problems unarchiving. Please build manually
Running make test
  Make had some problems, won't test
Running make install
  Make had some problems, won't install
Failed during this command:
 JESSE/WWW-Mechanize-1.72.tar.gz              : unwrapped NO -- untar failed

It seems to me that $newdir is not being updated with the dynamically generated /root/.cpan/build/JESSE-DGrTh_/ or /root/.cpan/build/JESSE-KjCEMS/ or whatever the system generates or at least that information is not getting to the tar command

Does anyone know how I can fix the mechanism without having to resort to a manual install ?

Answer 1

Edit:

I ran into this problem again. All I needed to do was free some memory like Keith Broughton suggested.

---

I ran into the same problem and tried to find the root cause for this problem. I'm listing my findings here so other Googlers don't have to spend a couple of hours before giving up...

What solved it for me was simply rebooting the system.

Things I tried:

• Upgrading CPAN. This would also fail with the "Couldn't untar" error message. I doesn't matter if you try it using the cpan shell, "cpan -i CPAN" or "perl -MCPAN -e 'install CPAN'". I didn't think any of these would solve the problem, but when you start googling all these are suggested as possible solutions.
• Replacing tar with a script that logs its input to check if one of the parameters or cwd is incorrect when it is called. The script is never called it seems. The "Couldn't untar" message is still the same, even after temporarily renaming /bin/tar.
• Checking CPAN/Tarzip.pm and adding print lines near the code that writes the "Couldn't untar" message. It seems that the system() call fails and tar (or ls in my debug code) is never called.

Then I decided to reboot, which was an option because this is not a live system. After that the problem was gone and Perl modules installed on first try.

Other observations:

• The system seems to work just fine for the rest. You can still connect to the system, you can edit files, modifications are still there after the reboot. I would expect any of these to fail long before a Perl system() call starts to fail.
• A quick scan through the logfiles doesn't show any red flags.

Answer 2

Sometimes this can happen simply due to a lack of available memory. Try turning off some services that are running and try again.

Worked for me :-)

Answer 3

To resolve the following error:

Couldn't untar WWW-Mechanize-1.72.tar

Try install Archive::Tar

On centos 6.X:

yum install perl-Archive-Tar.x86_64