Examples of org.apache.hadoop.hbase.HServerInfo

org.apache.hadoop.hbase.HServerInfo
HServerInfo contains metainfo about an HRegionServer, Currently it only contains the server start code. In the future it will contain information about the source machine and load statistics.

    String machineName = DNS.getDefaultHost(
        conf.get("hbase.regionserver.dns.interface","default"),
        conf.get("hbase.regionserver.dns.nameserver","default"));
    // Address is givin a default IP for the moment. Will be changed after
    // calling the master.
    this.serverInfo = new HServerInfo(new HServerAddress(
      new InetSocketAddress(address.getBindAddress(),
      this.server.getListenerAddress().getPort())), System.currentTimeMillis(),
      this.conf.getInt("hbase.regionserver.info.port", 60030), machineName);
    
    if (this.serverInfo.getServerAddress() == null) {

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          servers.remove(s);
          loadToServers.put(load, servers);
        }
      }
    }
    HServerInfo storedInfo = serversToServerInfo.remove(s);
    if (storedInfo != null && !master.closed.get()) {
      // The startup message was from a known server with the same name.
      // Timeout the old one right away.
      HServerAddress root = master.getRootRegionLocation();
      boolean rootServer = false;
      if (root != null && root.equals(storedInfo.getServerAddress())) {
        master.regionManager.unsetRootRegion();
        rootServer = true;
      }
      try {
        master.toDoQueue.put(

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      // happen after check of MSG_REPORT_EXITING above, since region server
      // will send us one of these messages after it gets MSG_REGIONSERVER_STOP
      return new HMsg [] {REGIONSERVER_STOP};
    }


    HServerInfo storedInfo = serversToServerInfo.get(serverName);
    if (storedInfo == null) {
      if (LOG.isDebugEnabled()) {
        LOG.debug("received server report from unknown server: " + serverName);
      }


      // The HBaseMaster may have been restarted.
      // Tell the RegionServer to start over and call regionServerStartup()
      return new HMsg[]{CALL_SERVER_STARTUP};
    } else if (storedInfo.getStartCode() != serverInfo.getStartCode()) {
      // This state is reachable if:
      //
      // 1) RegionServer A started
      // 2) RegionServer B started on the same machine, then 
      //    clobbered A in regionServerStartup.

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  }
  
  /** Cancel a server's lease and update its load information */
  private boolean cancelLease(final String serverName) {
    boolean leaseCancelled = false;
    HServerInfo info = serversToServerInfo.remove(serverName);
    // Only cancel lease and update load information once.
    // This method can be called a couple of times during shutdown.
    if (info != null) {
      LOG.info("Cancelling lease for " + serverName);
      if (master.getRootRegionLocation() != null &&
        info.getServerAddress().equals(master.getRootRegionLocation())) {
        master.regionManager.unsetRootRegion();
      }
      try {
        serverLeases.cancelLease(serverName);
      } catch (LeaseException e) {

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    }


    public void leaseExpired() {
      LOG.info(server + " lease expired");
      // Remove the server from the known servers list and update load info
      HServerInfo info = serversToServerInfo.remove(server);
      boolean rootServer = false;
      if (info != null) {
        HServerAddress root = master.getRootRegionLocation();
        if (root != null && root.equals(info.getServerAddress())) {
          // NOTE: If the server was serving the root region, we cannot reassign
          // it here because the new server will start serving the root region
          // before ProcessServerShutdown has a chance to split the log file.
          master.regionManager.unsetRootRegion();
          rootServer = true;
        }
        String serverName = info.getServerAddress().toString();
        HServerLoad load = serversToLoad.remove(serverName);
        if (load != null) {
          synchronized (loadToServers) {
            Set<String> servers = loadToServers.get(load);
            if (servers != null) {

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          this.master.regionManager.regionIsInTransition(info.getRegionName()) ||
          this.master.serverManager.isDead(serverName)) {


        return;
      }
      HServerInfo storedInfo = null;
      if (serverName.length() != 0) {
        storedInfo = this.master.serverManager.getServerInfo(serverName);
      }


      /*
       * If the startcode is off -- either null or doesn't match the start code
       * for the address -- then add it to the list of unassigned regions.
       */ 
      if (storedInfo == null || storedInfo.getStartCode() != startCode) {


        // The current assignment is invalid
        if (LOG.isDebugEnabled()) {
          LOG.debug("Current assignment of " + info.getRegionNameAsString() +
            " is not valid; " +
            (storedInfo == null ? " Server '" + serverName + "' unknown." :
                " serverInfo: " + storedInfo + ", passed startCode: " +
                startCode + ", storedInfo.startCode: " +
                storedInfo.getStartCode()));
        }


        // Recover the region server's log if there is one.
        // This is only done from here if we are restarting and there is stale
        // data in the meta region. Once we are on-line, dead server log

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   */
  @Override
  @QosPriority(priority=HConstants.HIGH_QOS)
  public HServerInfo getHServerInfo() throws IOException {
    checkOpen();
    return new HServerInfo(new HServerAddress(this.isa),
      this.startcode, this.webuiport);
  }

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      out.print(msg );
      out.write("</p>\n\n<h2>Region Servers</h2>\n");
 if (serverToServerInfos != null && serverToServerInfos.size() > 0) { 
      out.write("\n<table>\n<tr><th>Address</th><th>Start Code</th><th>Load</th></tr>\n");
   for (Map.Entry<String, HServerInfo> e: serverToServerInfos.entrySet()) {
       HServerInfo hsi = e.getValue();
       String url = "http://" +
         hsi.getServerAddress().getBindAddress().toString() + ":" +
         hsi.getInfoPort() + "/";
       String load = hsi.getLoad().toString();
       long startCode = hsi.getStartCode();
       String address = hsi.getServerAddress().toString();


      out.write("\n<tr><td><a href=\"");
      out.print( url );
      out.write('"');
      out.write('>');

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      out = pageContext.getOut();
      _jspx_out = out;




  HRegionServer regionServer = (HRegionServer)getServletContext().getAttribute(HRegionServer.REGIONSERVER);
  HServerInfo serverInfo = regionServer.getServerInfo();
  SortedMap<Text, HRegion> onlineRegions = regionServer.getOnlineRegions();


      out.write("<?xml version=\"1.0\" encoding=\"UTF-8\" ?>\n<!DOCTYPE html PUBLIC \"-//W3C//DTD XHTML 1.0 Transitional//EN\" \n  \"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd\"> \n<html xmlns=\"http://www.w3.org/1999/xhtml\">\n<head><meta http-equiv=\"Content-Type\" content=\"text/html;charset=UTF-8\"/>\n<title>Hbase Region Server: ");
      out.print( serverInfo.getServerAddress().toString() );
      out.write("</title>\n<link rel=\"stylesheet\" type=\"text/css\" href=\"/static/hbase.css\" />\n</head>\n\n<body>\n<a id=\"logo\" href=\"http://wiki.apache.org/lucene-hadoop/Hbase\"><img src=\"/static/hbase_logo_med.gif\" alt=\"Hbase Logo\" title=\"Hbase Logo\" /></a>\n<h1 id=\"page_title\">Region Server: ");
      out.print( serverInfo.getServerAddress().toString() );
      out.write("</h1>\n<p id=\"links_menu\"><a href=\"/logs/\">Local logs</a>, <a href=\"/stacks\">Thread Dump</a></p>\n<hr id=\"head_rule\" />\n\n<h2>Region Server Attributes</h2>\n<table>\n<tr><th>Attribute Name</th><th>Value</th></tr>\n<tr><td>Load</td><td>");
      out.print( serverInfo.getLoad().toString() );
      out.write("</td></tr>\n</table>\n\n<h2>Online Regions</h2>\n");
 if (onlineRegions != null && onlineRegions.size() > 0) { 
      out.write("\n<table>\n<tr><th>Region Name</th><th>Start Key</th><th>End Key</th></tr>\n");
   for (HRegion r: onlineRegions.values()) { 
      out.write("\n<tr><td>");

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      // - contact every region server to add them to the regionservers list
      // - get their current regions assignment 
      for (HServerAddress address : addresses) {
        HRegionInterface hri = 
          this.connection.getHRegionConnection(address, false);
        HServerInfo info = hri.getHServerInfo();
        LOG.debug("Inspection found server " + info.getName());
        serverManager.recordNewServer(info, true);
        HRegionInfo[] regions = hri.getRegionsAssignment();
        for (HRegionInfo region : regions) {
          if(region.isRootRegion()) {
            connection.setRootRegionLocation(

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