private static HRegionServer setDrainingServer(final HRegionServer hrs) throws KeeperException {
LOG.info(
"Making "
+ hrs.getServerName()
+ " the draining server; "
+ "it has "
+ hrs.getNumberOfOnlineRegions()
+ " online regions");
ZooKeeperWatcher zkw = hrs.getZooKeeper();
String hrsDrainingZnode = ZKUtil.joinZNode(zkw.drainingZNode, hrs.getServerName().toString());
ZKUtil.createWithParents(zkw, hrsDrainingZnode);
return hrs;
}
private static HRegionServer unsetDrainingServer(final HRegionServer hrs) throws KeeperException {
ZooKeeperWatcher zkw = hrs.getZooKeeper();
String hrsDrainingZnode = ZKUtil.joinZNode(zkw.drainingZNode, hrs.getServerName().toString());
ZKUtil.deleteNode(zkw, hrsDrainingZnode);
return hrs;
}