Examples of org.apache.hadoop.hbase.ServerName

org.apache.hadoop.hbase.ServerName
Instance of an HBase ServerName. A server name is used uniquely identifying a server instance in a cluster and is made of the combination of hostname, port, and startcode. The startcode distingushes restarted servers on same hostname and port (startcode is usually timestamp of server startup). The {@link #toString()} format of ServerName is safe to use in the filesystem and as znode nameup in ZooKeeper. Its format is: <hostname> ' {@link #SERVERNAME_SEPARATOR}' <port> ' {@link #SERVERNAME_SEPARATOR}' <startcode>. For example, if hostname is www.example.org, port is 1234, and the startcode for the regionserver is 1212121212, then the {@link #toString()} would be www.example.org,1234,1212121212.
You can obtain a versioned serialized form of this class by calling {@link #getVersionedBytes()}. To deserialize, call {@link #parseVersionedServerName(byte[])}
Immutable.

          return false;
        }
        
      });
    rootRegionTracker.start();
    ServerName sn = null;
    try {
      sn = rootRegionTracker.getRootRegionLocation();
    } finally {
      rootRegionTracker.stop();
    }

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          + "have handle to reach it.");
      return;
    }
    long startcode = Bytes.toLong(startcodeBytes);


    ServerName hsa = new ServerName(Bytes.toString(value), startcode);
    byte[] hriVal = r.getValue(HConstants.CATALOG_FAMILY, HConstants.REGIONINFO_QUALIFIER);
    HRegionInfo hri= Writables.getHRegionInfoOrNull(hriVal);
    if (hri == null) {
      LOG.warn("Unable to close region " + hi.getRegionNameAsString()
          + " because META had invalid or missing "

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          Pair<HRegionInfo, ServerName> pair = MetaReader.parseCatalogResult(result);
          if (pair == null || pair.getFirst() == null) {
            emptyRegionInfoQualifiers.add(result);
            return true;
          }
          ServerName sn = null;
          if (pair.getSecond() != null) {
            sn = pair.getSecond();
          }
          HRegionInfo hri = pair.getFirst();
          if (!(isTableIncluded(hri.getTableNameAsString())

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      return null;  //To change body of implemented methods use File | Settings | File Templates.
    }


    @Override
    public ServerName getServerName() {
      return new ServerName("hostname.example.org", 1234, -1L);
    }

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        ZKUtil.getDataAndWatch(this.watcher, this.watcher.masterAddressZNode);
      if (bytes == null) {
        msg = ("A master was detected, but went down before its address " +
          "could be read.  Attempting to become the next active master");
      } else {
        ServerName currentMaster = ServerName.parseVersionedServerName(bytes);
        if (ServerName.isSameHostnameAndPort(currentMaster, this.sn)) {
          msg = ("Current master has this master's address, " +
            currentMaster + "; master was restarted?  Waiting on znode " +
            "to expire...");
          // Hurry along the expiration of the znode.

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    try {
      // If our address is in ZK, delete it on our way out
      byte [] bytes =
        ZKUtil.getDataAndWatch(watcher, watcher.masterAddressZNode);
      // TODO: redo this to make it atomic (only added for tests)
      ServerName master = bytes == null ? null : ServerName.parseVersionedServerName(bytes);
      if (master != null &&  master.equals(this.sn)) {
        ZKUtil.deleteNode(watcher, watcher.masterAddressZNode);
      }
    } catch (KeeperException e) {
      LOG.error(this.watcher.prefix("Error deleting our own master address node"), e);
    }

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        0, // we dont use high priority handlers in master
        conf.getBoolean("hbase.rpc.verbose", false), conf,
        0); // this is a DNC w/o high priority handlers
    // Set our address.
    this.isa = this.rpcServer.getListenerAddress();
    this.serverName = new ServerName(this.isa.getHostName(),
      this.isa.getPort(), System.currentTimeMillis());
    this.rsFatals = new MemoryBoundedLogMessageBuffer(
        conf.getLong("hbase.master.buffer.for.rs.fatals", 1*1024*1024));


    // initialize server principal (if using secure Hadoop)

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    // Work on ROOT region.  Is it in zk in transition?
    status.setStatus("Assigning ROOT region");
    boolean rit = this.assignmentManager.
      processRegionInTransitionAndBlockUntilAssigned(HRegionInfo.ROOT_REGIONINFO);
    ServerName currentRootServer = null;
    boolean rootRegionLocation = catalogTracker.verifyRootRegionLocation(timeout);
    if (!rit && !rootRegionLocation) {
      currentRootServer = this.catalogTracker.getRootLocation();
      splitLogAndExpireIfOnline(currentRootServer);
      this.assignmentManager.assignRoot();
      waitForRootAssignment();
      assigned++;
    } else if (rit && !rootRegionLocation) {
      waitForRootAssignment();
      assigned++;
    } else {
      // Region already assigned. We didn't assign it. Add to in-memory state.
      this.assignmentManager.regionOnline(HRegionInfo.ROOT_REGIONINFO,
          this.catalogTracker.getRootLocation());
    }
    // Enable the ROOT table if on process fail over the RS containing ROOT
    // was active.
    enableCatalogTables(Bytes.toString(HConstants.ROOT_TABLE_NAME));
    LOG.info("-ROOT- assigned=" + assigned + ", rit=" + rit +
      ", location=" + catalogTracker.getRootLocation());


    // Work on meta region
    status.setStatus("Assigning META region");
    rit = this.assignmentManager.
      processRegionInTransitionAndBlockUntilAssigned(HRegionInfo.FIRST_META_REGIONINFO);
    boolean metaRegionLocation = this.catalogTracker.verifyMetaRegionLocation(timeout);
    if (!rit && !metaRegionLocation) {
      ServerName currentMetaServer =
        this.catalogTracker.getMetaLocationOrReadLocationFromRoot();
      if (currentMetaServer != null
          && !currentMetaServer.equals(currentRootServer)) {
        splitLogAndExpireIfOnline(currentMetaServer);
      }
      assignmentManager.assignMeta();
      enableSSHandWaitForMeta();
      assigned++;

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  public MapWritable regionServerStartup(final int port,
    final long serverStartCode, final long serverCurrentTime)
  throws IOException {
    // Register with server manager
    InetAddress ia = HBaseServer.getRemoteIp();
    ServerName rs = this.serverManager.regionServerStartup(ia, port,
      serverStartCode, serverCurrentTime);
    // Send back some config info
    MapWritable mw = createConfigurationSubset();
    mw.put(new Text(HConstants.KEY_FOR_HOSTNAME_SEEN_BY_MASTER),
      new Text(rs.getHostname()));
    return mw;
  }

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  throws UnknownRegionException {
    Pair<HRegionInfo, ServerName> p =
      this.assignmentManager.getAssignment(encodedRegionName);
    if (p == null)
      throw new UnknownRegionException(Bytes.toStringBinary(encodedRegionName));
    ServerName dest = null;
    if (destServerName == null || destServerName.length == 0) {
      LOG.info("Passed destination servername is null or empty so choosing a server at random");
      List<ServerName> destServers = this.serverManager.getOnlineServersList();
      destServers.remove(p.getSecond());
      // If i have only one RS then destination can be null.
      dest = balancer.randomAssignment(destServers);
    } else {
      dest = new ServerName(Bytes.toString(destServerName));
    }
    
    // Now we can do the move
    RegionPlan rp = new RegionPlan(p.getFirst(), p.getSecond(), dest);

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