private void updateSufficientCoverage(Group group, boolean sufficientCoverage) {
        if (sufficientCoverage == group.hasSufficientCoverage()) return; // no change

        group.setHasSufficientCoverage(sufficientCoverage);
        updateVipStatusOnCoverageChange(group, sufficientCoverage);
    }
Called by the cluster monitor when node state changes to failed
container-search/src/main/java/com/yahoo/search/dispatch/searchcluster/SearchCluster.java