After patching ESS Active servers can't interchnage to standby server.
After upgrading standby server, customer performed an interchange to upgrade active server as well, everything got registered to ESS.
init@IrvingESSCM1> swversion
Operating system: Linux 2.6.18-417.AV1xen i686 i686
Built: Feb 7 18:49 2017
Contains: 03.0.124.0
CM Reports as: R016x.03.0.124.0
CM Release String: vcm-016-03.0.124.0
Publication Date: 04 October 2012
UPDATES:
Update ID Status Type Update description
------------------------------- ------------ ------- ---------------------------
03.0.124.0-21904 activated cold fix shellshock bug
03.0.124.0-23675 activated cold 6.3.16.0-SP16
KERNEL-2.6.18-417.AV1 activated cold kernel patch KERNEL-2.6.18-
Platform/Security ID Status Type Update description
------------------------------- ------------ ------- ---------------------------
PLAT-rhel5.3-3021 activated cold RHEL5.3-SSP308
Messaging ID Status Type Update description
------------------------------- ------------ ------- ---------------------------
CM Translation Saved: 2017-09-13 23:34:14
CM License Installed: 2017-09-14 00:32:15
CM Memory Config: Large Survivable