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.


  @Override
  public ServerName getServerName() {
    // Our servername could change after we talk to the master.
    return this.serverNameFromMasterPOV == null?
      new ServerName(this.isa.getHostName(), this.isa.getPort(), this.startcode):
        this.serverNameFromMasterPOV;
  }

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      case RS_ZK_REGION_OPENED:
        // Region is opened, insert into RIT and handle it
        regionsInTransition.put(encodedRegionName, new RegionState(
            regionInfo, RegionState.State.OPEN,
            data.getStamp(), data.getOrigin()));
        ServerName sn = data.getOrigin() == null? null: data.getOrigin();
        // sn could be null if this server is no longer online.  If
        // that is the case, just let this RIT timeout; it'll be assigned
        // to new server then.
        if (sn == null) {
          LOG.warn("Region in transition " + regionInfo.getEncodedName() +

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      HRegionInfo hri = null;
      if (data == null || data.getOrigin() == null) {
        LOG.warn("Unexpected NULL input " + data);
        return;
      }
      ServerName sn = data.getOrigin();
      // Check if this is a special HBCK transition
      if (sn.equals(HConstants.HBCK_CODE_SERVERNAME)) {
        handleHBCK(data);
        return;
      }
      String encodedName = HRegionInfo.encodeRegionName(data.getRegionName());
      String prettyPrintedRegionName = HRegionInfo.prettyPrint(encodedName);

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        this.regionsInTransition.notifyAll();
      }
    }
    synchronized (this.regions) {
      // Add check
      ServerName oldSn = this.regions.get(regionInfo);
      if (oldSn != null) LOG.warn("Overwriting " + regionInfo.getEncodedName() +
        " on " + oldSn + " with " + sn);
      
      if (isServerOnline(sn)) {
        this.regions.put(regionInfo, sn);

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   * Used when a region has been closed but should be reassigned.
   * @param regionInfo
   */
  public void setOffline(HRegionInfo regionInfo) {
    synchronized (this.regions) {
      ServerName sn = this.regions.remove(regionInfo);
      if (sn == null) return;
      Set<HRegionInfo> serverRegions = this.servers.get(sn);
      if (!serverRegions.remove(regionInfo)) {
        LOG.warn("No " + regionInfo + " on " + sn);
      }

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          "already in transition (" + state.getState() + ", force=" + force + ")");
        return;
      }
    } 
    // Send CLOSE RPC
    ServerName server = null;
    synchronized (this.regions) {
      server = regions.get(region);
    }
    // ClosedRegionhandler can remove the server from this.regions
    if (server == null) {

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      boolean disabled = false;
      boolean disablingOrEnabling = false;
      Pair<HRegionInfo, ServerName> region = MetaReader.parseCatalogResult(result);
      if (region == null) continue;
      HRegionInfo regionInfo = region.getFirst();
      ServerName regionLocation = region.getSecond();
      if (regionInfo == null) continue;
      String tableName = regionInfo.getTableNameAsString();
      if (regionLocation == null) {
        // regionLocation could be null if createTable didn't finish properly.
        // When createTable is in progress, HMaster restarts.

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    } catch (KeeperException e) {
      master.abort("Unexpected ZK exception reading unassigned node for region="
        + hri.getEncodedName(), e);
    }


    ServerName addressFromZK = (data != null && data.getOrigin() != null) ?
      data.getOrigin() : null;
    if (addressFromZK != null) {
      // if we get something from ZK, we will use the data
      boolean matchZK = (addressFromZK != null &&
        addressFromZK.equals(serverName));
      LOG.debug("based on ZK, current region=" + hri.getRegionNameAsString() +
          " is on server=" + addressFromZK +
          " server being checked=: " + serverName);
      return matchZK;
    }


    ServerName addressFromAM = getRegionServerOfRegion(hri);
    boolean matchAM = (addressFromAM != null &&
      addressFromAM.equals(serverName));
    LOG.debug("based on AM, current region=" + hri.getRegionNameAsString() +
      " is on server=" + (addressFromAM != null ? addressFromAM : "null") +
      " server being checked: " + serverName);


    return matchAM;

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    // Clean out any existing assignment plans for this server
    synchronized (this.regionPlans) {
      for (Iterator <Map.Entry<String, RegionPlan>> i =
          this.regionPlans.entrySet().iterator(); i.hasNext();) {
        Map.Entry<String, RegionPlan> e = i.next();
        ServerName otherSn = e.getValue().getDestination();
        // The name will be null if the region is planned for a random assign.
        if (otherSn != null && otherSn.equals(sn)) {
          // Use iterator's remove else we'll get CME
          i.remove();
        }
      }
    }

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        rootLocation.getHostname() == null) {
      errors.reportError(ERROR_CODE.NULL_ROOT_REGION,
        "Root Region or some of its attributes are null.");
      return false;
    }
    ServerName sn;
    try {
      sn = getRootRegionServerName();
    } catch (InterruptedException e) {
      throw new IOException("Interrupted", e);
    }

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