for(String storeName: storeNames) {
for(Node node: cluster.getNodes()) {
log.info("Rolling back data on node " + node.getId() + " and for store "
+ storeName + " to version "
+ previousVersions.get(node.getId()).get(storeName));
swapper.invokeRollback(storeName,
previousVersions.get(node.getId()).get(storeName));
log.info("Successfully rolled back data on node " + node.getId()
+ " and for store " + storeName);
}
}