Service unavailable: Transaction failed, tablet 2758e5c68e974b92a3060db8575f3621 transaction memory consumption (67031036) has exceeded its limit (67108864) or the limit of an ancestral tracker

[Lee King]

We got an error about :Service unavailable: Transaction failed, tablet
2758e5c68e974b92a3060db8575f3621 transaction memory consumption (67031036)
has exceeded its limit (67108864) or the limit of an ancestral tracker.It
looks like https://issues.apache.org/jira/browse/KUDU-1912. and the bug
will be fix at 1.5,but out version is 1.4,Is there any affect for kudu
stablity or data consistency?