We have a 3-node xtradb 5.6 cluster doing multiwrites. From time to time, it happens that two nodes try to insert into a unique column at the same time, making the losing node inconstitent and having it dropped from the cluster. As a sidenote, a simple restart is rarely enough to bringt it back online with IST, most times a restart directly triggers SST, but after that, it errors out with innodb log failures and we have to delete data-directory and do another full SST. That seems to be some kind of bug or misconfiguration, but that got nothing to do with my question, I guess.
We would like to avoid these errors altogether, since the inserts into that table are not that important. With mysql master-slave replication, there is slave-skip-errors=1062 - is there an equivalent for xtradb cluster replication?