Unable to run programs "yum", "rhn-profile-sync", "rhn_check" - Segmentation fault (core dumped).

Solution Verified - Updated -

Environment

  • Red Hat Enterprise Linux 6

Issue

  • Programs "yum" , "rhn-profile-sync" and "rhn_check" fail with the error "Segmentation fault (core dumped)".

Resolution

Remove the symlink to "libz" version in "/usr/local/lib" directory and create the symlink to the correct "libz" version in "/lib64" directory.

[~] # cd /usr/local/lib
[/usr/local/lib] # ln -s /lib64/libz.so.1 libz.so.1.2.3
[/usr/local/lib] # rm libz.so
[/usr/local/lib] # rm libz.so.1
[/usr/local/lib] # ln -s libz.so.1.2.3 libz.so
[/usr/local/lib] # ln -s libz.so.1.2.3 libz.so.1

Root Cause

  • There are two different "libz" libraries installed on the system. One is located in "/usr/local/lib" directory and the other one in "/lib64" directory. Programs like "yum" rely on the specific version which is installed in "/lib64" directory.

Diagnostic Steps

In sosreport, check "sos_commands/libraries/ldconfig_-p_-N_-X":

host [~/sosreport/sos_commands/libraries] # cat ldconfig_-p_-N_-X 
626 libs found in cache `/etc/ld.so.cache'
    libz.so.1 (libc6,x86-64) => /usr/local/lib/libz.so.1
    libz.so.1 (libc6,x86-64) => /lib64/libz.so.1
    libz.so (libc6,x86-64) => /usr/local/lib/libz.so

Run "strace yum update":

open("/var/cache/yum/x86_64/6Server/clone-rhel-x86_64-server-6-august-06-2013/primary.xml.gz", O_RDONLY) = 6
lseek(6, 0, SEEK_CUR)                   = 0
read(6, "\37\213\10\0\0\0\0\0\0\0\354\275{w\3336\3267\372\277?\5W\316Zg\3225\221L\360\316"..., 8192) = 8192
--- SIGSEGV (Segmentation fault) @ 0 (0) ---
+++ killed by SIGSEGV (core dumped) +++
  • Component
  • yum

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