Both systems were in the same timezone, "America/New York". Then the slave was changed by editting /etc/sysconfig/clock ZONE="America/Chicago", rm /etc/localtime; ln -s /usr/share/zoneinfo/America/Chicago /etc/localtime
Because of kernel updates at the same time, both systems were rebooted after this we saw the errors from pt-table-checksum with any tables that had timestamps.
an example is attached, reverting the time zone fixed the issue
Both systems were in the same timezone, "America/New York". Then the slave was changed by editting /etc/sysconfig/ clock ZONE="America/ Chicago" , rm /etc/localtime; ln -s /usr/share/ zoneinfo/ America/ Chicago /etc/localtime
Because of kernel updates at the same time, both systems were rebooted after this we saw the errors from pt-table-checksum with any tables that had timestamps.
an example is attached, reverting the time zone fixed the issue