[Spacewalk-list] error in sync SLE repo

[YANG LI]

I got following error while sync SLE repo. 

/usr/bin/spacewalk-repo-sync -c sles11sp1_x86_64_pool
Repo URL: https://xxxxxxx:xxxxxxx@nu.novell.com/repo/$RCE/SLES11-SP1-Pool/sle-11-x86_64/
Packages in repo:              2581
Packages already synced:       2572
Packages to sync:                 9
1/9 : apache2-mod_python-3.3.1-147.19-0.x86_64
error: rpmts_HdrFromFdno: rpmReadSignature failed: sigh load: BAD
error reading package header
2/9 : gcc-c++-4.3-62.198-0.x86_64
error: rpmts_HdrFromFdno: rpmReadSignature failed: sigh load: BAD
error reading package header
3/9 : libarchive2-2.5.5-5.19-0.x86_64
error: rpmts_HdrFromFdno: rpmReadSignature failed: sigh load: BAD
error reading package header
4/9 : libibcm-1.0.4-4.12-0.x86_64
error: rpmts_HdrFromFdno: rpmReadSignature failed: sigh load: BAD
error reading package header
5/9 : libunwind-0.98.6-26.6-0.x86_64
error: rpmts_HdrFromFdno: rpmReadSignature failed: sigh load: BAD
error reading package header

some SLE repo works fine, but some will give out this error. does any one else has this same issue? how I can fix it?

Thanks,
Yang