Examples with ServerName org.apache.hadoop.hbase.ServerName used on opensource projects

Example 31 with ServerName

use of org.apache.hadoop.hbase.ServerName in project hbase by apache.

the class AssignmentManager method isCarryingRegion.

/**
   * Check if the shutdown server carries the specific region.
   * @return whether the serverName currently hosts the region
   */
private boolean isCarryingRegion(ServerName serverName, HRegionInfo hri) {
    RegionState regionState = regionStates.getRegionTransitionState(hri);
    ServerName transitionAddr = regionState != null ? regionState.getServerName() : null;
    if (transitionAddr != null) {
        boolean matchTransitionAddr = transitionAddr.equals(serverName);
        LOG.debug("Checking region=" + hri.getRegionNameAsString() + ", transitioning on server=" + matchTransitionAddr + " server being checked: " + serverName + ", matches=" + matchTransitionAddr);
        return matchTransitionAddr;
    }
    ServerName assignedAddr = regionStates.getRegionServerOfRegion(hri);
    boolean matchAssignedAddr = serverName.equals(assignedAddr);
    LOG.debug("based on AM, current region=" + hri.getRegionNameAsString() + " is on server=" + assignedAddr + ", server being checked: " + serverName);
    return matchAssignedAddr;
}

Example 32 with ServerName

use of org.apache.hadoop.hbase.ServerName in project hbase by apache.

the class AssignmentManager method prepareDaughterReplicaForAssignment.

private void prepareDaughterReplicaForAssignment(HRegionInfo daughterHri, HRegionInfo parentHri, int replicaId, Map<HRegionInfo, ServerName> map) {
    HRegionInfo parentReplica = RegionReplicaUtil.getRegionInfoForReplica(parentHri, replicaId);
    HRegionInfo daughterReplica = RegionReplicaUtil.getRegionInfoForReplica(daughterHri, replicaId);
    LOG.debug("Created replica region for daughter " + daughterReplica);
    ServerName sn;
    if ((sn = regionStates.getRegionServerOfRegion(parentReplica)) != null) {
        map.put(daughterReplica, sn);
    } else {
        List<ServerName> servers = serverManager.getOnlineServersList();
        sn = servers.get((new Random(System.currentTimeMillis())).nextInt(servers.size()));
        map.put(daughterReplica, sn);
    }
}

Example 33 with ServerName

use of org.apache.hadoop.hbase.ServerName in project hbase by apache.

the class AssignmentManager method rebuildUserRegions.

/**
   * Rebuild the list of user regions and assignment information.
   * Updates regionstates with findings as we go through list of regions.
   * @return set of servers not online that hosted some regions according to a scan of hbase:meta
   * @throws IOException
   */
Set<ServerName> rebuildUserRegions() throws IOException, KeeperException {
    Set<TableName> disabledOrEnablingTables = tableStateManager.getTablesInStates(TableState.State.DISABLED, TableState.State.ENABLING);
    Set<TableName> disabledOrDisablingOrEnabling = tableStateManager.getTablesInStates(TableState.State.DISABLED, TableState.State.DISABLING, TableState.State.ENABLING);
    // Region assignment from META
    List<Result> results = MetaTableAccessor.fullScanRegions(server.getConnection());
    // Get any new but slow to checkin region server that joined the cluster
    Set<ServerName> onlineServers = serverManager.getOnlineServers().keySet();
    // Set of offline servers to be returned
    Set<ServerName> offlineServers = new HashSet<>();
    // Iterate regions in META
    for (Result result : results) {
        if (result == null && LOG.isDebugEnabled()) {
            LOG.debug("null result from meta - ignoring but this is strange.");
            continue;
        }
        // keep a track of replicas to close. These were the replicas of the originally
        // unmerged regions. The master might have closed them before but it mightn't
        // maybe because it crashed.
        PairOfSameType<HRegionInfo> p = MetaTableAccessor.getMergeRegions(result);
        if (p.getFirst() != null && p.getSecond() != null) {
            int numReplicas = getNumReplicas(server, p.getFirst().getTable());
            for (HRegionInfo merge : p) {
                for (int i = 1; i < numReplicas; i++) {
                    replicasToClose.add(RegionReplicaUtil.getRegionInfoForReplica(merge, i));
                }
            }
        }
        RegionLocations rl = MetaTableAccessor.getRegionLocations(result);
        if (rl == null) {
            continue;
        }
        HRegionLocation[] locations = rl.getRegionLocations();
        if (locations == null) {
            continue;
        }
        for (HRegionLocation hrl : locations) {
            if (hrl == null)
                continue;
            HRegionInfo regionInfo = hrl.getRegionInfo();
            if (regionInfo == null)
                continue;
            int replicaId = regionInfo.getReplicaId();
            State state = RegionStateStore.getRegionState(result, replicaId);
            // but it couldn't maybe because it crashed
            if (replicaId == 0 && state.equals(State.SPLIT)) {
                for (HRegionLocation h : locations) {
                    replicasToClose.add(h.getRegionInfo());
                }
            }
            ServerName lastHost = hrl.getServerName();
            ServerName regionLocation = RegionStateStore.getRegionServer(result, replicaId);
            regionStates.createRegionState(regionInfo, state, regionLocation, lastHost);
            if (!regionStates.isRegionInState(regionInfo, State.OPEN)) {
                // Region is not open (either offline or in transition), skip
                continue;
            }
            TableName tableName = regionInfo.getTable();
            if (!onlineServers.contains(regionLocation)) {
                // Region is located on a server that isn't online
                offlineServers.add(regionLocation);
            } else if (!disabledOrEnablingTables.contains(tableName)) {
                // Region is being served and on an active server
                // add only if region not in disabled or enabling table
                regionStates.regionOnline(regionInfo, regionLocation);
                balancer.regionOnline(regionInfo, regionLocation);
            }
            // this will be used in rolling restarts
            if (!disabledOrDisablingOrEnabling.contains(tableName) && !getTableStateManager().isTableState(tableName, TableState.State.ENABLED)) {
                setEnabledTable(tableName);
            }
        }
    }
    return offlineServers;
}

Example 34 with ServerName

use of org.apache.hadoop.hbase.ServerName in project hbase by apache.

the class DrainingServerTracker method add.

private void add(final List<String> servers) throws IOException {
    synchronized (this.drainingServers) {
        this.drainingServers.clear();
        for (String n : servers) {
            final ServerName sn = ServerName.valueOf(ZKUtil.getNodeName(n));
            this.drainingServers.add(sn);
            this.serverManager.addServerToDrainList(sn);
            LOG.info("Draining RS node created, adding to list [" + sn + "]");
        }
    }
}

Example 35 with ServerName

use of org.apache.hadoop.hbase.ServerName in project hbase by apache.

the class DrainingServerTracker method nodeDeleted.

@Override
public void nodeDeleted(final String path) {
    if (path.startsWith(watcher.znodePaths.drainingZNode)) {
        final ServerName sn = ServerName.valueOf(ZKUtil.getNodeName(path));
        LOG.info("Draining RS node deleted, removing from list [" + sn + "]");
        remove(sn);
    }
}