List<HRegionInfo> toAssignRegions = new ArrayList<HRegionInfo>();
toAssignRegions.addAll(regionsInTransition);
// Iterate regions that were on this server and assign them
if (hris != null) {
RegionStates regionStates = am.getRegionStates();
for (Map.Entry<HRegionInfo, Result> e: hris.entrySet()) {
HRegionInfo hri = e.getKey();
if (regionsInTransition.contains(hri)) {
continue;
}
String encodedName = hri.getEncodedName();
Lock lock = am.acquireRegionLock(encodedName);
try {
RegionState rit = regionStates.getRegionTransitionState(hri);
if (processDeadRegion(hri, e.getValue(), am, server.getCatalogTracker())) {
ServerName addressFromAM = regionStates.getRegionServerOfRegion(hri);
if (addressFromAM != null && !addressFromAM.equals(this.serverName)) {
// If this region is in transition on the dead server, it must be
// opening or pending_open, which should have been covered by AM#processServerShutdown
LOG.info("Skip assigning region " + hri.getRegionNameAsString()
+ " because it has been opened in " + addressFromAM.getServerName());
continue;
}
if (rit != null) {
if (rit.getServerName() != null && !rit.isOnServer(serverName)) {
// Skip regions that are in transition on other server
LOG.info("Skip assigning region in transition on other server" + rit);
continue;
}
try{
//clean zk node
LOG.info("Reassigning region with rs = " + rit + " and deleting zk node if exists");
ZKAssign.deleteNodeFailSilent(services.getZooKeeper(), hri);
regionStates.updateRegionState(hri, State.OFFLINE);
} catch (KeeperException ke) {
this.server.abort("Unexpected ZK exception deleting unassigned node " + hri, ke);
return;
}
} else if (regionStates.isRegionInState(
hri, State.SPLITTING_NEW, State.MERGING_NEW)) {
regionStates.regionOffline(hri);
}
toAssignRegions.add(hri);
} else if (rit != null) {
if (rit.isPendingCloseOrClosing()
&& am.getZKTable().isDisablingOrDisabledTable(hri.getTable())) {
// If the table was partially disabled and the RS went down, we should clear the RIT
// and remove the node for the region.
// The rit that we use may be stale in case the table was in DISABLING state
// but though we did assign we will not be clearing the znode in CLOSING state.
// Doing this will have no harm. See HBASE-5927
regionStates.updateRegionState(hri, State.OFFLINE);
am.deleteClosingOrClosedNode(hri, rit.getServerName());
am.offlineDisabledRegion(hri);
} else {
LOG.warn("THIS SHOULD NOT HAPPEN: unexpected region in transition "
+ rit + " not to be assigned by SSH of server " + serverName);