I'm trying to update my CentOS 5.6 boxes to 5.7, and on every single one of them yum is failing with a segmentation fault: the error happens when yum is checking the 'base' repository. [root at picard yum]# yum update Loaded plugins: downloadonly, fastestmirror, priorities Determining fastest mirrors * base: mirrors.ircam.fr * extras: mirrors.ircam.fr * updates: mirror.opendoc.net base | 1.1 kB 00:00 base/primary | 961 kB 00:00 Segmentation fault Running yum under strace produces lots of output, the last lines are: access("/var/cache/yum/base/primary.xml.gz.sqlite-journal", F_OK) = -1 ENOENT (No such file or directory) fstat64(5, {st_mode=S_IFREG|0644, st_size=20480, ...}) = 0 _llseek(5, 0, [0], SEEK_SET) = 0 read(5, "SQLite format 3\0\4\0\1\1\0@ \0\0\0\21\0\0\0\0"..., 1024) = 1024 _llseek(5, 2048, [2048], SEEK_SET) = 0 read(5, "\r\0\0\0\0\4\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"..., 1024) = 1024 fcntl64(5, F_SETLK64, {type=F_UNLCK, whence=SEEK_SET, start=0, len=0}, 0xbf86a1c4) = 0 futex(0x7ba0918, FUTEX_WAKE_PRIVATE, 2147483647) = 0 stat64("/var/cache/yum/base/primary.xml.gz", {st_mode=S_IFREG|0644, st_size=983757, ...}) = 0 stat64("/var/cache/yum/base/primary.xml.gz", {st_mode=S_IFREG|0644, st_size=983757, ...}) = 0 stat64("/var/cache/yum/base/primary.xml.gz", {st_mode=S_IFREG|0644, st_size=983757, ...}) = 0 open("/var/cache/yum/base/primary.xml.gz", O_RDONLY|O_LARGEFILE) = 6 _llseek(6, 0, [0], SEEK_CUR) = 0 read(6, "\37\213\10\10\0\0\0\0\2\377/home/buildcentos/CENT"..., 8192) = 8192 --- SIGSEGV (Segmentation fault) @ 0 (0) --- +++ killed by SIGSEGV +++ It seems that the primary.xml.gz file is somehow corrupted, but I've already tried a "yum clean all" and a "rm -rf /var/cache/yum/*" without success. Apart from being at CentOS 5.6 and all having this problem, the boxes have very few in common: - 2 physical machine running 5.6 32-bit, one in my office, the other in a datacenter - 1 physical machine running 5.6 64-bit in another datacenter - 2 KVM VPS running 5.6 32-bit in a third datacenter - 1 Xen VPS running 5.6 64-bit in a fourth datacenter There was a thread on the forum some months ago which mentioned this same problem, but the original poster didn't find a solution (or if he did, he didn't share it with the forum). Any suggestion is appreciated, I cannot reinstall those boxes with 6.0 for at least 4/5 months.