Problem Summary

There is a known issue with Ensim and RedHat Enterprise Linux version 4 (RHEL4) after running up2date -u, or from an automated OS update, that BIND can no longer start correctly or your programs start to die with segmentation fault errors. This is due to a glibc & bind update and the Ensim being incompatible with those updates.

This is because the Ensim installer hooks into system libraries using the LD_PRELOAD environment variable. An example is

in /etc/init.d/sshd:
export LD_PRELOAD=/lib/libensimvwhbw.so
which will cause sshd to not start.

Suggested changes

These suggestions only apply to Ensim < 10.x on RHEL4 systems.

1. Fix the immediate issues (glibc and/or bind)
2. Fix the problem from re-occuring by adjusting settings in up2date

Fixing glibc issues

Reinstall the glibc package with the following command

rpm -Uvh --force http://downloads.theplanet.com/rpms/compat-glibc-2.3.2-95.30.i386.rpm \
http://downloads.theplanet.com/rpms/compat-glibc-headers-2.3.2-95.30.i386.rpm \
http://downloads.theplanet.com/rpms/glibc-2.3.4-2.i386.rpm \
http://downloads.theplanet.com/rpms/glibc-devel-2.3.4-2.i386.rpm \
http://downloads.theplanet.com/rpms/glibc-headers-2.3.4-2.i386.rpm \
http://downloads.theplanet.com/rpms/glibc-kernheaders-2.4-9.1.87.i386.rpm \
http://downloads.theplanet.com/rpms/glibc-common-2.3.4-2.i386.rpm \
http://downloads.theplanet.com/rpms/glibc-utils-2.3.4-2.i386.rpm


Fixing BIND for Ensim

1. Reinstall the following BIND packages with the following command
   

   rpm -Uvh --force \
http://downloads.theplanet.com/rpms/bind-9.2.4-28.el4.i386.rpm \
http://downloads.theplanet.com/rpms/bind-devel-9.2.4-28.el4.i386.rpm \
http://downloads.theplanet.com/rpms/bind-libs-9.2.4-28.el4.i386.rpm

2. Reinstall the Ensim BIND rpm with the following command
   

   rpm -Uvh --force http://downloads.theplanet.com/rpms/webppliance-bind-4.1.0-8.rhel.4ES.i386.rpm

3. Restart bind
   

   service named restart

Preventing further updates to glibc and bind

Choose one of the following methods:
• Manually edit /etc/sysconfig/rhn/up2date and make the changes suggested below
  

  The pkgsToInstallNotUpdate should at least have these values
  bind*;glibc*;

• Run up2date --configure and, when prompted type in 21 for the line number (should be pkgsToInstallNotUpdate or pkgsToInstallNotUp).
  

  The pkgsToInstallNotUpdate should at least have these values
  bind*;glibc*;

This will ensure that the packages are installable via up2date but will not update via automated updates or by manually running up2date. Note, that adding --force or -f to a manually invoked up2date command will in fact attempt to update all previously skipped packages.