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

Example 91 with ServerName

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

the class BaseLoadBalancer method roundRobinAssignment.

/**
   * Round robin a list of regions to a list of servers
   */
private void roundRobinAssignment(Cluster cluster, List<HRegionInfo> regions, List<HRegionInfo> unassignedRegions, List<ServerName> servers, Map<ServerName, List<HRegionInfo>> assignments) {
    int numServers = servers.size();
    int numRegions = regions.size();
    int max = (int) Math.ceil((float) numRegions / numServers);
    int serverIdx = 0;
    if (numServers > 1) {
        serverIdx = RANDOM.nextInt(numServers);
    }
    int regionIdx = 0;
    for (int j = 0; j < numServers; j++) {
        ServerName server = servers.get((j + serverIdx) % numServers);
        List<HRegionInfo> serverRegions = new ArrayList<>(max);
        for (int i = regionIdx; i < numRegions; i += numServers) {
            HRegionInfo region = regions.get(i % numRegions);
            if (cluster.wouldLowerAvailability(region, server)) {
                unassignedRegions.add(region);
            } else {
                serverRegions.add(region);
                cluster.doAssignRegion(region, server);
            }
        }
        assignments.put(server, serverRegions);
        regionIdx++;
    }
}

Example 92 with ServerName

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

the class RegionStates method getTableRSRegionMap.

private Map<TableName, Map<ServerName, List<HRegionInfo>>> getTableRSRegionMap(Boolean bytable) {
    Map<TableName, Map<ServerName, List<HRegionInfo>>> result = new HashMap<>();
    for (Map.Entry<ServerName, Set<HRegionInfo>> e : serverHoldings.entrySet()) {
        for (HRegionInfo hri : e.getValue()) {
            if (hri.isMetaRegion())
                continue;
            TableName tablename = bytable ? hri.getTable() : TableName.valueOf(HConstants.ENSEMBLE_TABLE_NAME);
            Map<ServerName, List<HRegionInfo>> svrToRegions = result.get(tablename);
            if (svrToRegions == null) {
                svrToRegions = new HashMap<>(serverHoldings.size());
                result.put(tablename, svrToRegions);
            }
            List<HRegionInfo> regions = svrToRegions.get(e.getKey());
            if (regions == null) {
                regions = new ArrayList<>();
                svrToRegions.put(e.getKey(), regions);
            }
            regions.add(hri);
        }
    }
    return result;
}

Example 93 with ServerName

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

the class RegionStates method getRegionInfo.

/**
   * Get the HRegionInfo from cache, if not there, from the hbase:meta table.
   * Be careful. Does RPC. Do not hold a lock or synchronize when you call this method.
   * @param  regionName
   * @return HRegionInfo for the region
   */
@SuppressWarnings("deprecation")
protected HRegionInfo getRegionInfo(final byte[] regionName) {
    String encodedName = HRegionInfo.encodeRegionName(regionName);
    RegionState regionState = getRegionState(encodedName);
    if (regionState != null) {
        return regionState.getRegion();
    }
    try {
        Pair<HRegionInfo, ServerName> p = MetaTableAccessor.getRegion(server.getConnection(), regionName);
        HRegionInfo hri = p == null ? null : p.getFirst();
        if (hri != null) {
            createRegionState(hri);
        }
        return hri;
    } catch (IOException e) {
        server.abort("Aborting because error occurred while reading " + Bytes.toStringBinary(regionName) + " from hbase:meta", e);
        return null;
    }
}

Example 94 with ServerName

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

the class RSRpcServices method closeRegion.

/**
   * Close a region on the region server.
   *
   * @param controller the RPC controller
   * @param request the request
   * @throws ServiceException
   */
@Override
@QosPriority(priority = HConstants.ADMIN_QOS)
public CloseRegionResponse closeRegion(final RpcController controller, final CloseRegionRequest request) throws ServiceException {
    final ServerName sn = (request.hasDestinationServer() ? ProtobufUtil.toServerName(request.getDestinationServer()) : null);
    try {
        checkOpen();
        if (request.hasServerStartCode()) {
            // check that we are the same server that this RPC is intended for.
            long serverStartCode = request.getServerStartCode();
            if (regionServer.serverName.getStartcode() != serverStartCode) {
                throw new ServiceException(new DoNotRetryIOException("This RPC was intended for a " + "different server with startCode: " + serverStartCode + ", this server is: " + regionServer.serverName));
            }
        }
        final String encodedRegionName = ProtobufUtil.getRegionEncodedName(request.getRegion());
        requestCount.increment();
        if (sn == null) {
            LOG.info("Close " + encodedRegionName + " without moving");
        } else {
            LOG.info("Close " + encodedRegionName + ", moving to " + sn);
        }
        boolean closed = regionServer.closeRegion(encodedRegionName, false, sn);
        CloseRegionResponse.Builder builder = CloseRegionResponse.newBuilder().setClosed(closed);
        return builder.build();
    } catch (IOException ie) {
        throw new ServiceException(ie);
    }
}

Example 95 with ServerName

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

the class HBaseAdmin method getRegion.

/**
   * @param regionName Name of a region.
   * @return a pair of HRegionInfo and ServerName if <code>regionName</code> is
   *  a verified region name (we call {@link
   *  MetaTableAccessor#getRegionLocation(Connection, byte[])}
   *  else null.
   * Throw IllegalArgumentException if <code>regionName</code> is null.
   * @throws IOException
   */
Pair<HRegionInfo, ServerName> getRegion(final byte[] regionName) throws IOException {
    if (regionName == null) {
        throw new IllegalArgumentException("Pass a table name or region name");
    }
    Pair<HRegionInfo, ServerName> pair = MetaTableAccessor.getRegion(connection, regionName);
    if (pair == null) {
        final AtomicReference<Pair<HRegionInfo, ServerName>> result = new AtomicReference<>(null);
        final String encodedName = Bytes.toString(regionName);
        MetaTableAccessor.Visitor visitor = new MetaTableAccessor.Visitor() {

            @Override
            public boolean visit(Result data) throws IOException {
                HRegionInfo info = MetaTableAccessor.getHRegionInfo(data);
                if (info == null) {
                    LOG.warn("No serialized HRegionInfo in " + data);
                    return true;
                }
                RegionLocations rl = MetaTableAccessor.getRegionLocations(data);
                boolean matched = false;
                ServerName sn = null;
                if (rl != null) {
                    for (HRegionLocation h : rl.getRegionLocations()) {
                        if (h != null && encodedName.equals(h.getRegionInfo().getEncodedName())) {
                            sn = h.getServerName();
                            info = h.getRegionInfo();
                            matched = true;
                        }
                    }
                }
                if (!matched)
                    return true;
                result.set(new Pair<>(info, sn));
                // found the region, stop
                return false;
            }
        };
        MetaTableAccessor.fullScanRegions(connection, visitor);
        pair = result.get();
    }
    return pair;
}