http://git-wip-us.apache.org/repos/asf/hbase-site/blob/e9a81b89/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html
----------------------------------------------------------------------
diff --git 
a/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html 
b/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html
index b73a30b..8f8a8ff 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.html
@@ -563,503 +563,504 @@
 <span class="sourceLineNo">555</span>  }<a name="line.555"></a>
 <span class="sourceLineNo">556</span><a name="line.556"></a>
 <span class="sourceLineNo">557</span>  /*<a name="line.557"></a>
-<span class="sourceLineNo">558</span>   * Expire the passed server. Add it to 
list of dead servers and queue a shutdown processing.<a name="line.558"></a>
-<span class="sourceLineNo">559</span>   * @return True if we expired passed 
&lt;code&gt;serverName&lt;/code&gt; else false if we failed to schedule<a 
name="line.559"></a>
-<span class="sourceLineNo">560</span>   * an expire (and attendant 
ServerCrashProcedure -- some clients are dependent on<a name="line.560"></a>
-<span class="sourceLineNo">561</span>   * server crash procedure being queued 
and need to know if has not been queued).<a name="line.561"></a>
-<span class="sourceLineNo">562</span>   */<a name="line.562"></a>
-<span class="sourceLineNo">563</span>  public synchronized boolean 
expireServer(final ServerName serverName) {<a name="line.563"></a>
-<span class="sourceLineNo">564</span>    if 
(serverName.equals(master.getServerName())) {<a name="line.564"></a>
-<span class="sourceLineNo">565</span>      if (!(master.isAborted() || 
master.isStopped())) {<a name="line.565"></a>
-<span class="sourceLineNo">566</span>        master.stop("We lost our 
znode?");<a name="line.566"></a>
-<span class="sourceLineNo">567</span>      }<a name="line.567"></a>
-<span class="sourceLineNo">568</span>      return false;<a name="line.568"></a>
-<span class="sourceLineNo">569</span>    }<a name="line.569"></a>
-<span class="sourceLineNo">570</span>    if 
(!master.isServerCrashProcessingEnabled()) {<a name="line.570"></a>
-<span class="sourceLineNo">571</span>      LOG.info("Master doesn't enable 
ServerShutdownHandler during initialization, "<a name="line.571"></a>
-<span class="sourceLineNo">572</span>          + "delay expiring server " + 
serverName);<a name="line.572"></a>
-<span class="sourceLineNo">573</span>      // Even we delay expire this 
server, we still need to handle Meta's RIT<a name="line.573"></a>
-<span class="sourceLineNo">574</span>      // that are against the crashed 
server; since when we do RecoverMetaProcedure,<a name="line.574"></a>
-<span class="sourceLineNo">575</span>      // the SCP is not enable yet and 
Meta's RIT may be suspend forever. See HBase-19287<a name="line.575"></a>
-<span class="sourceLineNo">576</span>      
master.getAssignmentManager().handleMetaRITOnCrashedServer(serverName);<a 
name="line.576"></a>
-<span class="sourceLineNo">577</span>      
this.queuedDeadServers.add(serverName);<a name="line.577"></a>
-<span class="sourceLineNo">578</span>      return false;<a name="line.578"></a>
-<span class="sourceLineNo">579</span>    }<a name="line.579"></a>
-<span class="sourceLineNo">580</span>    if 
(this.deadservers.isDeadServer(serverName)) {<a name="line.580"></a>
-<span class="sourceLineNo">581</span>      // TODO: Can this happen?  It 
shouldn't be online in this case?<a name="line.581"></a>
-<span class="sourceLineNo">582</span>      LOG.warn("Expiration of " + 
serverName +<a name="line.582"></a>
-<span class="sourceLineNo">583</span>          " but server shutdown already 
in progress");<a name="line.583"></a>
-<span class="sourceLineNo">584</span>      return false;<a name="line.584"></a>
-<span class="sourceLineNo">585</span>    }<a name="line.585"></a>
-<span class="sourceLineNo">586</span>    
moveFromOnlineToDeadServers(serverName);<a name="line.586"></a>
-<span class="sourceLineNo">587</span><a name="line.587"></a>
-<span class="sourceLineNo">588</span>    // If cluster is going down, yes, 
servers are going to be expiring; don't<a name="line.588"></a>
-<span class="sourceLineNo">589</span>    // process as a dead server<a 
name="line.589"></a>
-<span class="sourceLineNo">590</span>    if (isClusterShutdown()) {<a 
name="line.590"></a>
-<span class="sourceLineNo">591</span>      LOG.info("Cluster shutdown set; " + 
serverName +<a name="line.591"></a>
-<span class="sourceLineNo">592</span>        " expired; onlineServers=" + 
this.onlineServers.size());<a name="line.592"></a>
-<span class="sourceLineNo">593</span>      if (this.onlineServers.isEmpty()) 
{<a name="line.593"></a>
-<span class="sourceLineNo">594</span>        master.stop("Cluster shutdown 
set; onlineServer=0");<a name="line.594"></a>
-<span class="sourceLineNo">595</span>      }<a name="line.595"></a>
-<span class="sourceLineNo">596</span>      return false;<a name="line.596"></a>
-<span class="sourceLineNo">597</span>    }<a name="line.597"></a>
-<span class="sourceLineNo">598</span>    LOG.info("Processing expiration of " 
+ serverName + " on " + this.master.getServerName());<a name="line.598"></a>
-<span class="sourceLineNo">599</span>    
master.getAssignmentManager().submitServerCrash(serverName, true);<a 
name="line.599"></a>
-<span class="sourceLineNo">600</span><a name="line.600"></a>
-<span class="sourceLineNo">601</span>    // Tell our listeners that a server 
was removed<a name="line.601"></a>
-<span class="sourceLineNo">602</span>    if (!this.listeners.isEmpty()) {<a 
name="line.602"></a>
-<span class="sourceLineNo">603</span>      for (ServerListener listener : 
this.listeners) {<a name="line.603"></a>
-<span class="sourceLineNo">604</span>        
listener.serverRemoved(serverName);<a name="line.604"></a>
-<span class="sourceLineNo">605</span>      }<a name="line.605"></a>
-<span class="sourceLineNo">606</span>    }<a name="line.606"></a>
-<span class="sourceLineNo">607</span>    return true;<a name="line.607"></a>
-<span class="sourceLineNo">608</span>  }<a name="line.608"></a>
-<span class="sourceLineNo">609</span><a name="line.609"></a>
-<span class="sourceLineNo">610</span>  @VisibleForTesting<a 
name="line.610"></a>
-<span class="sourceLineNo">611</span>  public void 
moveFromOnlineToDeadServers(final ServerName sn) {<a name="line.611"></a>
-<span class="sourceLineNo">612</span>    synchronized (onlineServers) {<a 
name="line.612"></a>
-<span class="sourceLineNo">613</span>      if 
(!this.onlineServers.containsKey(sn)) {<a name="line.613"></a>
-<span class="sourceLineNo">614</span>        LOG.warn("Expiration of " + sn + 
" but server not online");<a name="line.614"></a>
-<span class="sourceLineNo">615</span>      }<a name="line.615"></a>
-<span class="sourceLineNo">616</span>      // Remove the server from the known 
servers lists and update load info BUT<a name="line.616"></a>
-<span class="sourceLineNo">617</span>      // add to deadservers first; do 
this so it'll show in dead servers list if<a name="line.617"></a>
-<span class="sourceLineNo">618</span>      // not in online servers list.<a 
name="line.618"></a>
-<span class="sourceLineNo">619</span>      this.deadservers.add(sn);<a 
name="line.619"></a>
-<span class="sourceLineNo">620</span>      this.onlineServers.remove(sn);<a 
name="line.620"></a>
-<span class="sourceLineNo">621</span>      onlineServers.notifyAll();<a 
name="line.621"></a>
-<span class="sourceLineNo">622</span>    }<a name="line.622"></a>
-<span class="sourceLineNo">623</span>    this.rsAdmins.remove(sn);<a 
name="line.623"></a>
-<span class="sourceLineNo">624</span>  }<a name="line.624"></a>
-<span class="sourceLineNo">625</span><a name="line.625"></a>
-<span class="sourceLineNo">626</span>  public synchronized void 
processDeadServer(final ServerName serverName, boolean shouldSplitWal) {<a 
name="line.626"></a>
-<span class="sourceLineNo">627</span>    // When assignment manager is 
cleaning up the zookeeper nodes and rebuilding the<a name="line.627"></a>
-<span class="sourceLineNo">628</span>    // in-memory region states, region 
servers could be down. Meta table can and<a name="line.628"></a>
-<span class="sourceLineNo">629</span>    // should be re-assigned, log 
splitting can be done too. However, it is better to<a name="line.629"></a>
-<span class="sourceLineNo">630</span>    // wait till the cleanup is done 
before re-assigning user regions.<a name="line.630"></a>
-<span class="sourceLineNo">631</span>    //<a name="line.631"></a>
-<span class="sourceLineNo">632</span>    // We should not wait in the server 
shutdown handler thread since it can clog<a name="line.632"></a>
-<span class="sourceLineNo">633</span>    // the handler threads and meta table 
could not be re-assigned in case<a name="line.633"></a>
-<span class="sourceLineNo">634</span>    // the corresponding server is down. 
So we queue them up here instead.<a name="line.634"></a>
-<span class="sourceLineNo">635</span>    if 
(!master.getAssignmentManager().isFailoverCleanupDone()) {<a 
name="line.635"></a>
-<span class="sourceLineNo">636</span>      requeuedDeadServers.put(serverName, 
shouldSplitWal);<a name="line.636"></a>
-<span class="sourceLineNo">637</span>      return;<a name="line.637"></a>
-<span class="sourceLineNo">638</span>    }<a name="line.638"></a>
-<span class="sourceLineNo">639</span><a name="line.639"></a>
-<span class="sourceLineNo">640</span>    this.deadservers.add(serverName);<a 
name="line.640"></a>
-<span class="sourceLineNo">641</span>    
master.getAssignmentManager().submitServerCrash(serverName, shouldSplitWal);<a 
name="line.641"></a>
-<span class="sourceLineNo">642</span>  }<a name="line.642"></a>
-<span class="sourceLineNo">643</span><a name="line.643"></a>
-<span class="sourceLineNo">644</span>  /**<a name="line.644"></a>
-<span class="sourceLineNo">645</span>   * Process the servers which died 
during master's initialization. It will be<a name="line.645"></a>
-<span class="sourceLineNo">646</span>   * called after HMaster#assignMeta and 
AssignmentManager#joinCluster.<a name="line.646"></a>
-<span class="sourceLineNo">647</span>   * */<a name="line.647"></a>
-<span class="sourceLineNo">648</span>  synchronized void 
processQueuedDeadServers() {<a name="line.648"></a>
-<span class="sourceLineNo">649</span>    if 
(!master.isServerCrashProcessingEnabled()) {<a name="line.649"></a>
-<span class="sourceLineNo">650</span>      LOG.info("Master hasn't enabled 
ServerShutdownHandler");<a name="line.650"></a>
-<span class="sourceLineNo">651</span>    }<a name="line.651"></a>
-<span class="sourceLineNo">652</span>    Iterator&lt;ServerName&gt; 
serverIterator = queuedDeadServers.iterator();<a name="line.652"></a>
-<span class="sourceLineNo">653</span>    while (serverIterator.hasNext()) {<a 
name="line.653"></a>
-<span class="sourceLineNo">654</span>      ServerName tmpServerName = 
serverIterator.next();<a name="line.654"></a>
-<span class="sourceLineNo">655</span>      expireServer(tmpServerName);<a 
name="line.655"></a>
-<span class="sourceLineNo">656</span>      serverIterator.remove();<a 
name="line.656"></a>
-<span class="sourceLineNo">657</span>      
requeuedDeadServers.remove(tmpServerName);<a name="line.657"></a>
-<span class="sourceLineNo">658</span>    }<a name="line.658"></a>
-<span class="sourceLineNo">659</span><a name="line.659"></a>
-<span class="sourceLineNo">660</span>    if 
(!master.getAssignmentManager().isFailoverCleanupDone()) {<a 
name="line.660"></a>
-<span class="sourceLineNo">661</span>      if (LOG.isTraceEnabled()) {<a 
name="line.661"></a>
-<span class="sourceLineNo">662</span>        LOG.trace("AssignmentManager 
failover cleanup not done.");<a name="line.662"></a>
-<span class="sourceLineNo">663</span>      }<a name="line.663"></a>
-<span class="sourceLineNo">664</span>    }<a name="line.664"></a>
-<span class="sourceLineNo">665</span><a name="line.665"></a>
-<span class="sourceLineNo">666</span>    for (Map.Entry&lt;ServerName, 
Boolean&gt; entry : requeuedDeadServers.entrySet()) {<a name="line.666"></a>
-<span class="sourceLineNo">667</span>      processDeadServer(entry.getKey(), 
entry.getValue());<a name="line.667"></a>
-<span class="sourceLineNo">668</span>    }<a name="line.668"></a>
-<span class="sourceLineNo">669</span>    requeuedDeadServers.clear();<a 
name="line.669"></a>
-<span class="sourceLineNo">670</span>  }<a name="line.670"></a>
-<span class="sourceLineNo">671</span><a name="line.671"></a>
-<span class="sourceLineNo">672</span>  /*<a name="line.672"></a>
-<span class="sourceLineNo">673</span>   * Remove the server from the drain 
list.<a name="line.673"></a>
-<span class="sourceLineNo">674</span>   */<a name="line.674"></a>
-<span class="sourceLineNo">675</span>  public synchronized boolean 
removeServerFromDrainList(final ServerName sn) {<a name="line.675"></a>
-<span class="sourceLineNo">676</span>    // Warn if the server (sn) is not 
online.  ServerName is of the form:<a name="line.676"></a>
-<span class="sourceLineNo">677</span>    // &lt;hostname&gt; , &lt;port&gt; , 
&lt;startcode&gt;<a name="line.677"></a>
-<span class="sourceLineNo">678</span><a name="line.678"></a>
-<span class="sourceLineNo">679</span>    if (!this.isServerOnline(sn)) {<a 
name="line.679"></a>
-<span class="sourceLineNo">680</span>      LOG.warn("Server " + sn + " is not 
currently online. " +<a name="line.680"></a>
-<span class="sourceLineNo">681</span>               "Removing from draining 
list anyway, as requested.");<a name="line.681"></a>
-<span class="sourceLineNo">682</span>    }<a name="line.682"></a>
-<span class="sourceLineNo">683</span>    // Remove the server from the 
draining servers lists.<a name="line.683"></a>
-<span class="sourceLineNo">684</span>    return 
this.drainingServers.remove(sn);<a name="line.684"></a>
-<span class="sourceLineNo">685</span>  }<a name="line.685"></a>
-<span class="sourceLineNo">686</span><a name="line.686"></a>
-<span class="sourceLineNo">687</span>  /**<a name="line.687"></a>
-<span class="sourceLineNo">688</span>   * Add the server to the drain list.<a 
name="line.688"></a>
-<span class="sourceLineNo">689</span>   * @param sn<a name="line.689"></a>
-<span class="sourceLineNo">690</span>   * @return True if the server is added 
or the server is already on the drain list.<a name="line.690"></a>
-<span class="sourceLineNo">691</span>   */<a name="line.691"></a>
-<span class="sourceLineNo">692</span>  public synchronized boolean 
addServerToDrainList(final ServerName sn) {<a name="line.692"></a>
-<span class="sourceLineNo">693</span>    // Warn if the server (sn) is not 
online.  ServerName is of the form:<a name="line.693"></a>
-<span class="sourceLineNo">694</span>    // &lt;hostname&gt; , &lt;port&gt; , 
&lt;startcode&gt;<a name="line.694"></a>
-<span class="sourceLineNo">695</span><a name="line.695"></a>
-<span class="sourceLineNo">696</span>    if (!this.isServerOnline(sn)) {<a 
name="line.696"></a>
-<span class="sourceLineNo">697</span>      LOG.warn("Server " + sn + " is not 
currently online. " +<a name="line.697"></a>
-<span class="sourceLineNo">698</span>               "Ignoring request to add 
it to draining list.");<a name="line.698"></a>
-<span class="sourceLineNo">699</span>      return false;<a name="line.699"></a>
-<span class="sourceLineNo">700</span>    }<a name="line.700"></a>
-<span class="sourceLineNo">701</span>    // Add the server to the draining 
servers lists, if it's not already in<a name="line.701"></a>
-<span class="sourceLineNo">702</span>    // it.<a name="line.702"></a>
-<span class="sourceLineNo">703</span>    if 
(this.drainingServers.contains(sn)) {<a name="line.703"></a>
-<span class="sourceLineNo">704</span>      LOG.warn("Server " + sn + " is 
already in the draining server list." +<a name="line.704"></a>
-<span class="sourceLineNo">705</span>               "Ignoring request to add 
it again.");<a name="line.705"></a>
-<span class="sourceLineNo">706</span>      return true;<a name="line.706"></a>
-<span class="sourceLineNo">707</span>    }<a name="line.707"></a>
-<span class="sourceLineNo">708</span>    LOG.info("Server " + sn + " added to 
draining server list.");<a name="line.708"></a>
-<span class="sourceLineNo">709</span>    return 
this.drainingServers.add(sn);<a name="line.709"></a>
-<span class="sourceLineNo">710</span>  }<a name="line.710"></a>
-<span class="sourceLineNo">711</span><a name="line.711"></a>
-<span class="sourceLineNo">712</span>  // RPC methods to region servers<a 
name="line.712"></a>
-<span class="sourceLineNo">713</span><a name="line.713"></a>
-<span class="sourceLineNo">714</span>  private HBaseRpcController 
newRpcController() {<a name="line.714"></a>
-<span class="sourceLineNo">715</span>    return rpcControllerFactory == null ? 
null : rpcControllerFactory.newController();<a name="line.715"></a>
-<span class="sourceLineNo">716</span>  }<a name="line.716"></a>
-<span class="sourceLineNo">717</span><a name="line.717"></a>
-<span class="sourceLineNo">718</span>  /**<a name="line.718"></a>
-<span class="sourceLineNo">719</span>   * Sends a WARMUP RPC to the specified 
server to warmup the specified region.<a name="line.719"></a>
-<span class="sourceLineNo">720</span>   * &lt;p&gt;<a name="line.720"></a>
-<span class="sourceLineNo">721</span>   * A region server could reject the 
close request because it either does not<a name="line.721"></a>
-<span class="sourceLineNo">722</span>   * have the specified region or the 
region is being split.<a name="line.722"></a>
-<span class="sourceLineNo">723</span>   * @param server server to warmup a 
region<a name="line.723"></a>
-<span class="sourceLineNo">724</span>   * @param region region to  warmup<a 
name="line.724"></a>
-<span class="sourceLineNo">725</span>   */<a name="line.725"></a>
-<span class="sourceLineNo">726</span>  public void sendRegionWarmup(ServerName 
server,<a name="line.726"></a>
-<span class="sourceLineNo">727</span>      RegionInfo region) {<a 
name="line.727"></a>
-<span class="sourceLineNo">728</span>    if (server == null) return;<a 
name="line.728"></a>
-<span class="sourceLineNo">729</span>    try {<a name="line.729"></a>
-<span class="sourceLineNo">730</span>      AdminService.BlockingInterface 
admin = getRsAdmin(server);<a name="line.730"></a>
-<span class="sourceLineNo">731</span>      HBaseRpcController controller = 
newRpcController();<a name="line.731"></a>
-<span class="sourceLineNo">732</span>      
ProtobufUtil.warmupRegion(controller, admin, region);<a name="line.732"></a>
-<span class="sourceLineNo">733</span>    } catch (IOException e) {<a 
name="line.733"></a>
-<span class="sourceLineNo">734</span>      LOG.error("Received exception in 
RPC for warmup server:" +<a name="line.734"></a>
-<span class="sourceLineNo">735</span>        server + "region: " + region +<a 
name="line.735"></a>
-<span class="sourceLineNo">736</span>        "exception: " + e);<a 
name="line.736"></a>
-<span class="sourceLineNo">737</span>    }<a name="line.737"></a>
-<span class="sourceLineNo">738</span>  }<a name="line.738"></a>
-<span class="sourceLineNo">739</span><a name="line.739"></a>
-<span class="sourceLineNo">740</span>  /**<a name="line.740"></a>
-<span class="sourceLineNo">741</span>   * Contacts a region server and waits 
up to timeout ms<a name="line.741"></a>
-<span class="sourceLineNo">742</span>   * to close the region.  This bypasses 
the active hmaster.<a name="line.742"></a>
-<span class="sourceLineNo">743</span>   */<a name="line.743"></a>
-<span class="sourceLineNo">744</span>  public static void 
closeRegionSilentlyAndWait(ClusterConnection connection,<a name="line.744"></a>
-<span class="sourceLineNo">745</span>    ServerName server, RegionInfo region, 
long timeout) throws IOException, InterruptedException {<a name="line.745"></a>
-<span class="sourceLineNo">746</span>    AdminService.BlockingInterface rs = 
connection.getAdmin(server);<a name="line.746"></a>
-<span class="sourceLineNo">747</span>    HBaseRpcController controller = 
connection.getRpcControllerFactory().newController();<a name="line.747"></a>
-<span class="sourceLineNo">748</span>    try {<a name="line.748"></a>
-<span class="sourceLineNo">749</span>      
ProtobufUtil.closeRegion(controller, rs, server, region.getRegionName());<a 
name="line.749"></a>
-<span class="sourceLineNo">750</span>    } catch (IOException e) {<a 
name="line.750"></a>
-<span class="sourceLineNo">751</span>      LOG.warn("Exception when closing 
region: " + region.getRegionNameAsString(), e);<a name="line.751"></a>
-<span class="sourceLineNo">752</span>    }<a name="line.752"></a>
-<span class="sourceLineNo">753</span>    long expiration = timeout + 
System.currentTimeMillis();<a name="line.753"></a>
-<span class="sourceLineNo">754</span>    while (System.currentTimeMillis() 
&lt; expiration) {<a name="line.754"></a>
-<span class="sourceLineNo">755</span>      controller.reset();<a 
name="line.755"></a>
-<span class="sourceLineNo">756</span>      try {<a name="line.756"></a>
-<span class="sourceLineNo">757</span>        RegionInfo rsRegion =<a 
name="line.757"></a>
-<span class="sourceLineNo">758</span>          
ProtobufUtil.getRegionInfo(controller, rs, region.getRegionName());<a 
name="line.758"></a>
-<span class="sourceLineNo">759</span>        if (rsRegion == null) return;<a 
name="line.759"></a>
-<span class="sourceLineNo">760</span>      } catch (IOException ioe) {<a 
name="line.760"></a>
-<span class="sourceLineNo">761</span>        if (ioe instanceof 
NotServingRegionException) // no need to retry again<a name="line.761"></a>
-<span class="sourceLineNo">762</span>          return;<a name="line.762"></a>
-<span class="sourceLineNo">763</span>        LOG.warn("Exception when 
retrieving regioninfo from: "<a name="line.763"></a>
-<span class="sourceLineNo">764</span>          + 
region.getRegionNameAsString(), ioe);<a name="line.764"></a>
-<span class="sourceLineNo">765</span>      }<a name="line.765"></a>
-<span class="sourceLineNo">766</span>      Thread.sleep(1000);<a 
name="line.766"></a>
-<span class="sourceLineNo">767</span>    }<a name="line.767"></a>
-<span class="sourceLineNo">768</span>    throw new IOException("Region " + 
region + " failed to close within"<a name="line.768"></a>
-<span class="sourceLineNo">769</span>        + " timeout " + timeout);<a 
name="line.769"></a>
-<span class="sourceLineNo">770</span>  }<a name="line.770"></a>
-<span class="sourceLineNo">771</span><a name="line.771"></a>
-<span class="sourceLineNo">772</span>  /**<a name="line.772"></a>
-<span class="sourceLineNo">773</span>   * @param sn<a name="line.773"></a>
-<span class="sourceLineNo">774</span>   * @return Admin interface for the 
remote regionserver named &lt;code&gt;sn&lt;/code&gt;<a name="line.774"></a>
-<span class="sourceLineNo">775</span>   * @throws IOException<a 
name="line.775"></a>
-<span class="sourceLineNo">776</span>   * @throws RetriesExhaustedException 
wrapping a ConnectException if failed<a name="line.776"></a>
-<span class="sourceLineNo">777</span>   */<a name="line.777"></a>
-<span class="sourceLineNo">778</span>  public AdminService.BlockingInterface 
getRsAdmin(final ServerName sn)<a name="line.778"></a>
-<span class="sourceLineNo">779</span>  throws IOException {<a 
name="line.779"></a>
-<span class="sourceLineNo">780</span>    AdminService.BlockingInterface admin 
= this.rsAdmins.get(sn);<a name="line.780"></a>
-<span class="sourceLineNo">781</span>    if (admin == null) {<a 
name="line.781"></a>
-<span class="sourceLineNo">782</span>      LOG.debug("New admin connection to 
" + sn.toString());<a name="line.782"></a>
-<span class="sourceLineNo">783</span>      if 
(sn.equals(master.getServerName()) &amp;&amp; master instanceof HRegionServer) 
{<a name="line.783"></a>
-<span class="sourceLineNo">784</span>        // A master is also a region 
server now, see HBASE-10569 for details<a name="line.784"></a>
-<span class="sourceLineNo">785</span>        admin = 
((HRegionServer)master).getRSRpcServices();<a name="line.785"></a>
-<span class="sourceLineNo">786</span>      } else {<a name="line.786"></a>
-<span class="sourceLineNo">787</span>        admin = 
this.connection.getAdmin(sn);<a name="line.787"></a>
-<span class="sourceLineNo">788</span>      }<a name="line.788"></a>
-<span class="sourceLineNo">789</span>      this.rsAdmins.put(sn, admin);<a 
name="line.789"></a>
-<span class="sourceLineNo">790</span>    }<a name="line.790"></a>
-<span class="sourceLineNo">791</span>    return admin;<a name="line.791"></a>
-<span class="sourceLineNo">792</span>  }<a name="line.792"></a>
-<span class="sourceLineNo">793</span><a name="line.793"></a>
-<span class="sourceLineNo">794</span>  /**<a name="line.794"></a>
-<span class="sourceLineNo">795</span>   * Calculate min necessary to start. 
This is not an absolute. It is just<a name="line.795"></a>
-<span class="sourceLineNo">796</span>   * a friction that will cause us hang 
around a bit longer waiting on<a name="line.796"></a>
-<span class="sourceLineNo">797</span>   * RegionServers to check-in.<a 
name="line.797"></a>
-<span class="sourceLineNo">798</span>   */<a name="line.798"></a>
-<span class="sourceLineNo">799</span>  private int getMinToStart() {<a 
name="line.799"></a>
-<span class="sourceLineNo">800</span>    // One server should be enough to get 
us off the ground.<a name="line.800"></a>
-<span class="sourceLineNo">801</span>    int requiredMinToStart = 1;<a 
name="line.801"></a>
-<span class="sourceLineNo">802</span>    if 
(LoadBalancer.isTablesOnMaster(master.getConfiguration())) {<a 
name="line.802"></a>
-<span class="sourceLineNo">803</span>      if 
(LoadBalancer.isSystemTablesOnlyOnMaster(master.getConfiguration())) {<a 
name="line.803"></a>
-<span class="sourceLineNo">804</span>        // If Master is carrying regions 
but NOT user-space regions, it<a name="line.804"></a>
-<span class="sourceLineNo">805</span>        // still shows as a 'server'. We 
need at least one more server to check<a name="line.805"></a>
-<span class="sourceLineNo">806</span>        // in before we can start up so 
set defaultMinToStart to 2.<a name="line.806"></a>
-<span class="sourceLineNo">807</span>        requiredMinToStart = 
requiredMinToStart + 1;<a name="line.807"></a>
-<span class="sourceLineNo">808</span>      }<a name="line.808"></a>
-<span class="sourceLineNo">809</span>    }<a name="line.809"></a>
-<span class="sourceLineNo">810</span>    int minToStart = 
this.master.getConfiguration().getInt(WAIT_ON_REGIONSERVERS_MINTOSTART, -1);<a 
name="line.810"></a>
-<span class="sourceLineNo">811</span>    // Ensure we are never less than 
requiredMinToStart else stuff won't work.<a name="line.811"></a>
-<span class="sourceLineNo">812</span>    return minToStart == -1 || minToStart 
&lt; requiredMinToStart? requiredMinToStart: minToStart;<a name="line.812"></a>
-<span class="sourceLineNo">813</span>  }<a name="line.813"></a>
-<span class="sourceLineNo">814</span><a name="line.814"></a>
-<span class="sourceLineNo">815</span>  /**<a name="line.815"></a>
-<span class="sourceLineNo">816</span>   * Wait for the region servers to 
report in.<a name="line.816"></a>
-<span class="sourceLineNo">817</span>   * We will wait until one of this 
condition is met:<a name="line.817"></a>
-<span class="sourceLineNo">818</span>   *  - the master is stopped<a 
name="line.818"></a>
-<span class="sourceLineNo">819</span>   *  - the 
'hbase.master.wait.on.regionservers.maxtostart' number of<a name="line.819"></a>
-<span class="sourceLineNo">820</span>   *    region servers is reached<a 
name="line.820"></a>
-<span class="sourceLineNo">821</span>   *  - the 
'hbase.master.wait.on.regionservers.mintostart' is reached AND<a 
name="line.821"></a>
-<span class="sourceLineNo">822</span>   *   there have been no new region 
server in for<a name="line.822"></a>
-<span class="sourceLineNo">823</span>   *      
'hbase.master.wait.on.regionservers.interval' time AND<a name="line.823"></a>
-<span class="sourceLineNo">824</span>   *   the 
'hbase.master.wait.on.regionservers.timeout' is reached<a name="line.824"></a>
-<span class="sourceLineNo">825</span>   *<a name="line.825"></a>
-<span class="sourceLineNo">826</span>   * @throws InterruptedException<a 
name="line.826"></a>
-<span class="sourceLineNo">827</span>   */<a name="line.827"></a>
-<span class="sourceLineNo">828</span>  public void 
waitForRegionServers(MonitoredTask status) throws InterruptedException {<a 
name="line.828"></a>
-<span class="sourceLineNo">829</span>    final long interval = 
this.master.getConfiguration().<a name="line.829"></a>
-<span class="sourceLineNo">830</span>        
getLong(WAIT_ON_REGIONSERVERS_INTERVAL, 1500);<a name="line.830"></a>
-<span class="sourceLineNo">831</span>    final long timeout = 
this.master.getConfiguration().<a name="line.831"></a>
-<span class="sourceLineNo">832</span>        
getLong(WAIT_ON_REGIONSERVERS_TIMEOUT, 4500);<a name="line.832"></a>
-<span class="sourceLineNo">833</span>    // Min is not an absolute; just a 
friction making us wait longer on server checkin.<a name="line.833"></a>
-<span class="sourceLineNo">834</span>    int minToStart = getMinToStart();<a 
name="line.834"></a>
-<span class="sourceLineNo">835</span>    int maxToStart = 
this.master.getConfiguration().<a name="line.835"></a>
-<span class="sourceLineNo">836</span>        
getInt(WAIT_ON_REGIONSERVERS_MAXTOSTART, Integer.MAX_VALUE);<a 
name="line.836"></a>
-<span class="sourceLineNo">837</span>    if (maxToStart &lt; minToStart) {<a 
name="line.837"></a>
-<span class="sourceLineNo">838</span>      LOG.warn(String.format("The value 
of '%s' (%d) is set less than '%s' (%d), ignoring.",<a name="line.838"></a>
-<span class="sourceLineNo">839</span>          
WAIT_ON_REGIONSERVERS_MAXTOSTART, maxToStart,<a name="line.839"></a>
-<span class="sourceLineNo">840</span>          
WAIT_ON_REGIONSERVERS_MINTOSTART, minToStart));<a name="line.840"></a>
-<span class="sourceLineNo">841</span>      maxToStart = Integer.MAX_VALUE;<a 
name="line.841"></a>
-<span class="sourceLineNo">842</span>    }<a name="line.842"></a>
-<span class="sourceLineNo">843</span><a name="line.843"></a>
-<span class="sourceLineNo">844</span>    long now =  
System.currentTimeMillis();<a name="line.844"></a>
-<span class="sourceLineNo">845</span>    final long startTime = now;<a 
name="line.845"></a>
-<span class="sourceLineNo">846</span>    long slept = 0;<a name="line.846"></a>
-<span class="sourceLineNo">847</span>    long lastLogTime = 0;<a 
name="line.847"></a>
-<span class="sourceLineNo">848</span>    long lastCountChange = startTime;<a 
name="line.848"></a>
-<span class="sourceLineNo">849</span>    int count = countOfRegionServers();<a 
name="line.849"></a>
-<span class="sourceLineNo">850</span>    int oldCount = 0;<a 
name="line.850"></a>
-<span class="sourceLineNo">851</span>    // This while test is a little hard 
to read. We try to comment it in below but in essence:<a name="line.851"></a>
-<span class="sourceLineNo">852</span>    // Wait if Master is not stopped and 
the number of regionservers that have checked-in is<a name="line.852"></a>
-<span class="sourceLineNo">853</span>    // less than the maxToStart. Both of 
these conditions will be true near universally.<a name="line.853"></a>
-<span class="sourceLineNo">854</span>    // Next, we will keep cycling if ANY 
of the following three conditions are true:<a name="line.854"></a>
-<span class="sourceLineNo">855</span>    // 1. The time since a regionserver 
registered is &lt; interval (means servers are actively checking in).<a 
name="line.855"></a>
-<span class="sourceLineNo">856</span>    // 2. We are under the total 
timeout.<a name="line.856"></a>
-<span class="sourceLineNo">857</span>    // 3. The count of servers is &lt; 
minimum.<a name="line.857"></a>
-<span class="sourceLineNo">858</span>    for (ServerListener listener: 
this.listeners) {<a name="line.858"></a>
-<span class="sourceLineNo">859</span>      listener.waiting();<a 
name="line.859"></a>
-<span class="sourceLineNo">860</span>    }<a name="line.860"></a>
-<span class="sourceLineNo">861</span>    while (!this.master.isStopped() 
&amp;&amp; !isClusterShutdown() &amp;&amp; count &lt; maxToStart &amp;&amp;<a 
name="line.861"></a>
-<span class="sourceLineNo">862</span>        ((lastCountChange + interval) 
&gt; now || timeout &gt; slept || count &lt; minToStart)) {<a 
name="line.862"></a>
-<span class="sourceLineNo">863</span>      // Log some info at every interval 
time or if there is a change<a name="line.863"></a>
-<span class="sourceLineNo">864</span>      if (oldCount != count || 
lastLogTime + interval &lt; now) {<a name="line.864"></a>
-<span class="sourceLineNo">865</span>        lastLogTime = now;<a 
name="line.865"></a>
-<span class="sourceLineNo">866</span>        String msg =<a 
name="line.866"></a>
-<span class="sourceLineNo">867</span>            "Waiting on regionserver 
count=" + count + "; waited="+<a name="line.867"></a>
-<span class="sourceLineNo">868</span>                slept + "ms, expecting 
min=" + minToStart + " server(s), max="+ getStrForMax(maxToStart) +<a 
name="line.868"></a>
-<span class="sourceLineNo">869</span>                " server(s), " + 
"timeout=" + timeout + "ms, lastChange=" + (lastCountChange - now) + "ms";<a 
name="line.869"></a>
-<span class="sourceLineNo">870</span>        LOG.info(msg);<a 
name="line.870"></a>
-<span class="sourceLineNo">871</span>        status.setStatus(msg);<a 
name="line.871"></a>
-<span class="sourceLineNo">872</span>      }<a name="line.872"></a>
-<span class="sourceLineNo">873</span><a name="line.873"></a>
-<span class="sourceLineNo">874</span>      // We sleep for some time<a 
name="line.874"></a>
-<span class="sourceLineNo">875</span>      final long sleepTime = 50;<a 
name="line.875"></a>
-<span class="sourceLineNo">876</span>      Thread.sleep(sleepTime);<a 
name="line.876"></a>
-<span class="sourceLineNo">877</span>      now =  
System.currentTimeMillis();<a name="line.877"></a>
-<span class="sourceLineNo">878</span>      slept = now - startTime;<a 
name="line.878"></a>
-<span class="sourceLineNo">879</span><a name="line.879"></a>
-<span class="sourceLineNo">880</span>      oldCount = count;<a 
name="line.880"></a>
-<span class="sourceLineNo">881</span>      count = countOfRegionServers();<a 
name="line.881"></a>
-<span class="sourceLineNo">882</span>      if (count != oldCount) {<a 
name="line.882"></a>
-<span class="sourceLineNo">883</span>        lastCountChange = now;<a 
name="line.883"></a>
-<span class="sourceLineNo">884</span>      }<a name="line.884"></a>
-<span class="sourceLineNo">885</span>    }<a name="line.885"></a>
-<span class="sourceLineNo">886</span>    // Did we exit the loop because 
cluster is going down?<a name="line.886"></a>
-<span class="sourceLineNo">887</span>    if (isClusterShutdown()) {<a 
name="line.887"></a>
-<span class="sourceLineNo">888</span>      this.master.stop("Cluster 
shutdown");<a name="line.888"></a>
-<span class="sourceLineNo">889</span>    }<a name="line.889"></a>
-<span class="sourceLineNo">890</span>    LOG.info("Finished waiting on 
RegionServer count=" + count + "; waited=" + slept + "ms," +<a 
name="line.890"></a>
-<span class="sourceLineNo">891</span>        " expected min=" + minToStart + " 
server(s), max=" +  getStrForMax(maxToStart) + " server(s),"+<a 
name="line.891"></a>
-<span class="sourceLineNo">892</span>        " master is "+ 
(this.master.isStopped() ? "stopped.": "running"));<a name="line.892"></a>
-<span class="sourceLineNo">893</span>  }<a name="line.893"></a>
-<span class="sourceLineNo">894</span><a name="line.894"></a>
-<span class="sourceLineNo">895</span>  private String getStrForMax(final int 
max) {<a name="line.895"></a>
-<span class="sourceLineNo">896</span>    return max == Integer.MAX_VALUE? 
"NO_LIMIT": Integer.toString(max);<a name="line.896"></a>
-<span class="sourceLineNo">897</span>  }<a name="line.897"></a>
-<span class="sourceLineNo">898</span><a name="line.898"></a>
-<span class="sourceLineNo">899</span>  /**<a name="line.899"></a>
-<span class="sourceLineNo">900</span>   * @return A copy of the internal list 
of online servers.<a name="line.900"></a>
-<span class="sourceLineNo">901</span>   */<a name="line.901"></a>
-<span class="sourceLineNo">902</span>  public List&lt;ServerName&gt; 
getOnlineServersList() {<a name="line.902"></a>
-<span class="sourceLineNo">903</span>    // TODO: optimize the load balancer 
call so we don't need to make a new list<a name="line.903"></a>
-<span class="sourceLineNo">904</span>    // TODO: FIX. THIS IS POPULAR CALL.<a 
name="line.904"></a>
-<span class="sourceLineNo">905</span>    return new 
ArrayList&lt;&gt;(this.onlineServers.keySet());<a name="line.905"></a>
-<span class="sourceLineNo">906</span>  }<a name="line.906"></a>
-<span class="sourceLineNo">907</span><a name="line.907"></a>
-<span class="sourceLineNo">908</span>  /**<a name="line.908"></a>
-<span class="sourceLineNo">909</span>   * @param keys The target server name<a 
name="line.909"></a>
-<span class="sourceLineNo">910</span>   * @param idleServerPredicator 
Evaluates the server on the given load<a name="line.910"></a>
-<span class="sourceLineNo">911</span>   * @return A copy of the internal list 
of online servers matched by the predicator<a name="line.911"></a>
-<span class="sourceLineNo">912</span>   */<a name="line.912"></a>
-<span class="sourceLineNo">913</span>  public List&lt;ServerName&gt; 
getOnlineServersListWithPredicator(List&lt;ServerName&gt; keys,<a 
name="line.913"></a>
-<span class="sourceLineNo">914</span>    Predicate&lt;ServerMetrics&gt; 
idleServerPredicator) {<a name="line.914"></a>
-<span class="sourceLineNo">915</span>    List&lt;ServerName&gt; names = new 
ArrayList&lt;&gt;();<a name="line.915"></a>
-<span class="sourceLineNo">916</span>    if (keys != null &amp;&amp; 
idleServerPredicator != null) {<a name="line.916"></a>
-<span class="sourceLineNo">917</span>      keys.forEach(name -&gt; {<a 
name="line.917"></a>
-<span class="sourceLineNo">918</span>        ServerMetrics load = 
onlineServers.get(name);<a name="line.918"></a>
-<span class="sourceLineNo">919</span>        if (load != null) {<a 
name="line.919"></a>
-<span class="sourceLineNo">920</span>          if 
(idleServerPredicator.test(load)) {<a name="line.920"></a>
-<span class="sourceLineNo">921</span>            names.add(name);<a 
name="line.921"></a>
-<span class="sourceLineNo">922</span>          }<a name="line.922"></a>
-<span class="sourceLineNo">923</span>        }<a name="line.923"></a>
-<span class="sourceLineNo">924</span>      });<a name="line.924"></a>
-<span class="sourceLineNo">925</span>    }<a name="line.925"></a>
-<span class="sourceLineNo">926</span>    return names;<a name="line.926"></a>
-<span class="sourceLineNo">927</span>  }<a name="line.927"></a>
-<span class="sourceLineNo">928</span><a name="line.928"></a>
-<span class="sourceLineNo">929</span>  /**<a name="line.929"></a>
-<span class="sourceLineNo">930</span>   * @return A copy of the internal list 
of draining servers.<a name="line.930"></a>
-<span class="sourceLineNo">931</span>   */<a name="line.931"></a>
-<span class="sourceLineNo">932</span>  public List&lt;ServerName&gt; 
getDrainingServersList() {<a name="line.932"></a>
-<span class="sourceLineNo">933</span>    return new 
ArrayList&lt;&gt;(this.drainingServers);<a name="line.933"></a>
-<span class="sourceLineNo">934</span>  }<a name="line.934"></a>
-<span class="sourceLineNo">935</span><a name="line.935"></a>
-<span class="sourceLineNo">936</span>  /**<a name="line.936"></a>
-<span class="sourceLineNo">937</span>   * @return A copy of the internal set 
of deadNotExpired servers.<a name="line.937"></a>
-<span class="sourceLineNo">938</span>   */<a name="line.938"></a>
-<span class="sourceLineNo">939</span>  Set&lt;ServerName&gt; 
getDeadNotExpiredServers() {<a name="line.939"></a>
-<span class="sourceLineNo">940</span>    return new 
HashSet&lt;&gt;(this.queuedDeadServers);<a name="line.940"></a>
-<span class="sourceLineNo">941</span>  }<a name="line.941"></a>
-<span class="sourceLineNo">942</span><a name="line.942"></a>
-<span class="sourceLineNo">943</span>  public boolean 
isServerOnline(ServerName serverName) {<a name="line.943"></a>
-<span class="sourceLineNo">944</span>    return serverName != null &amp;&amp; 
onlineServers.containsKey(serverName);<a name="line.944"></a>
-<span class="sourceLineNo">945</span>  }<a name="line.945"></a>
-<span class="sourceLineNo">946</span><a name="line.946"></a>
-<span class="sourceLineNo">947</span>  /**<a name="line.947"></a>
-<span class="sourceLineNo">948</span>   * Check if a server is known to be 
dead.  A server can be online,<a name="line.948"></a>
-<span class="sourceLineNo">949</span>   * or known to be dead, or unknown to 
this manager (i.e, not online,<a name="line.949"></a>
-<span class="sourceLineNo">950</span>   * not known to be dead either. it is 
simply not tracked by the<a name="line.950"></a>
-<span class="sourceLineNo">951</span>   * master any more, for example, a very 
old previous instance).<a name="line.951"></a>
-<span class="sourceLineNo">952</span>   */<a name="line.952"></a>
-<span class="sourceLineNo">953</span>  public synchronized boolean 
isServerDead(ServerName serverName) {<a name="line.953"></a>
-<span class="sourceLineNo">954</span>    return serverName == null || 
deadservers.isDeadServer(serverName)<a name="line.954"></a>
-<span class="sourceLineNo">955</span>      || 
queuedDeadServers.contains(serverName)<a name="line.955"></a>
-<span class="sourceLineNo">956</span>      || 
requeuedDeadServers.containsKey(serverName);<a name="line.956"></a>
-<span class="sourceLineNo">957</span>  }<a name="line.957"></a>
-<span class="sourceLineNo">958</span><a name="line.958"></a>
-<span class="sourceLineNo">959</span>  public void shutdownCluster() {<a 
name="line.959"></a>
-<span class="sourceLineNo">960</span>    String statusStr = "Cluster shutdown 
requested of master=" + this.master.getServerName();<a name="line.960"></a>
-<span class="sourceLineNo">961</span>    LOG.info(statusStr);<a 
name="line.961"></a>
-<span class="sourceLineNo">962</span>    this.clusterShutdown.set(true);<a 
name="line.962"></a>
-<span class="sourceLineNo">963</span>  }<a name="line.963"></a>
-<span class="sourceLineNo">964</span><a name="line.964"></a>
-<span class="sourceLineNo">965</span>  boolean isClusterShutdown() {<a 
name="line.965"></a>
-<span class="sourceLineNo">966</span>    return this.clusterShutdown.get();<a 
name="line.966"></a>
-<span class="sourceLineNo">967</span>  }<a name="line.967"></a>
-<span class="sourceLineNo">968</span><a name="line.968"></a>
-<span class="sourceLineNo">969</span>  /**<a name="line.969"></a>
-<span class="sourceLineNo">970</span>   * Stop the ServerManager.<a 
name="line.970"></a>
-<span class="sourceLineNo">971</span>   */<a name="line.971"></a>
-<span class="sourceLineNo">972</span>  public void stop() {<a 
name="line.972"></a>
-<span class="sourceLineNo">973</span>    // Nothing to do.<a 
name="line.973"></a>
-<span class="sourceLineNo">974</span>  }<a name="line.974"></a>
-<span class="sourceLineNo">975</span><a name="line.975"></a>
-<span class="sourceLineNo">976</span>  /**<a name="line.976"></a>
-<span class="sourceLineNo">977</span>   * Creates a list of possible 
destinations for a region. It contains the online servers, but not<a 
name="line.977"></a>
-<span class="sourceLineNo">978</span>   *  the draining or dying servers.<a 
name="line.978"></a>
-<span class="sourceLineNo">979</span>   *  @param serversToExclude can be null 
if there is no server to exclude<a name="line.979"></a>
-<span class="sourceLineNo">980</span>   */<a name="line.980"></a>
-<span class="sourceLineNo">981</span>  public List&lt;ServerName&gt; 
createDestinationServersList(final List&lt;ServerName&gt; serversToExclude){<a 
name="line.981"></a>
-<span class="sourceLineNo">982</span>    final List&lt;ServerName&gt; 
destServers = getOnlineServersList();<a name="line.982"></a>
-<span class="sourceLineNo">983</span><a name="line.983"></a>
-<span class="sourceLineNo">984</span>    if (serversToExclude != null) {<a 
name="line.984"></a>
-<span class="sourceLineNo">985</span>      
destServers.removeAll(serversToExclude);<a name="line.985"></a>
-<span class="sourceLineNo">986</span>    }<a name="line.986"></a>
-<span class="sourceLineNo">987</span><a name="line.987"></a>
-<span class="sourceLineNo">988</span>    // Loop through the draining server 
list and remove them from the server list<a name="line.988"></a>
-<span class="sourceLineNo">989</span>    final List&lt;ServerName&gt; 
drainingServersCopy = getDrainingServersList();<a name="line.989"></a>
-<span class="sourceLineNo">990</span>    
destServers.removeAll(drainingServersCopy);<a name="line.990"></a>
-<span class="sourceLineNo">991</span><a name="line.991"></a>
-<span class="sourceLineNo">992</span>    // Remove the deadNotExpired servers 
from the server list.<a name="line.992"></a>
-<span class="sourceLineNo">993</span>    
removeDeadNotExpiredServers(destServers);<a name="line.993"></a>
-<span class="sourceLineNo">994</span>    return destServers;<a 
name="line.994"></a>
-<span class="sourceLineNo">995</span>  }<a name="line.995"></a>
-<span class="sourceLineNo">996</span><a name="line.996"></a>
-<span class="sourceLineNo">997</span>  /**<a name="line.997"></a>
-<span class="sourceLineNo">998</span>   * Calls {@link 
#createDestinationServersList} without server to exclude.<a name="line.998"></a>
-<span class="sourceLineNo">999</span>   */<a name="line.999"></a>
-<span class="sourceLineNo">1000</span>  public List&lt;ServerName&gt; 
createDestinationServersList(){<a name="line.1000"></a>
-<span class="sourceLineNo">1001</span>    return 
createDestinationServersList(null);<a name="line.1001"></a>
-<span class="sourceLineNo">1002</span>  }<a name="line.1002"></a>
-<span class="sourceLineNo">1003</span><a name="line.1003"></a>
-<span class="sourceLineNo">1004</span>    /**<a name="line.1004"></a>
-<span class="sourceLineNo">1005</span>    * Loop through the deadNotExpired 
server list and remove them from the<a name="line.1005"></a>
-<span class="sourceLineNo">1006</span>    * servers.<a name="line.1006"></a>
-<span class="sourceLineNo">1007</span>    * This function should be used 
carefully outside of this class. You should use a high level<a 
name="line.1007"></a>
-<span class="sourceLineNo">1008</span>    *  method such as {@link 
#createDestinationServersList()} instead of managing you own list.<a 
name="line.1008"></a>
-<span class="sourceLineNo">1009</span>    */<a name="line.1009"></a>
-<span class="sourceLineNo">1010</span>  void 
removeDeadNotExpiredServers(List&lt;ServerName&gt; servers) {<a 
name="line.1010"></a>
-<span class="sourceLineNo">1011</span>    Set&lt;ServerName&gt; 
deadNotExpiredServersCopy = this.getDeadNotExpiredServers();<a 
name="line.1011"></a>
-<span class="sourceLineNo">1012</span>    if 
(!deadNotExpiredServersCopy.isEmpty()) {<a name="line.1012"></a>
-<span class="sourceLineNo">1013</span>      for (ServerName server : 
deadNotExpiredServersCopy) {<a name="line.1013"></a>
-<span class="sourceLineNo">1014</span>        LOG.debug("Removing dead but not 
expired server: " + server<a name="line.1014"></a>
-<span class="sourceLineNo">1015</span>          + " from eligible server 
pool.");<a name="line.1015"></a>
-<span class="sourceLineNo">1016</span>        servers.remove(server);<a 
name="line.1016"></a>
-<span class="sourceLineNo">1017</span>      }<a name="line.1017"></a>
-<span class="sourceLineNo">1018</span>    }<a name="line.1018"></a>
-<span class="sourceLineNo">1019</span>  }<a name="line.1019"></a>
-<span class="sourceLineNo">1020</span><a name="line.1020"></a>
-<span class="sourceLineNo">1021</span>  /**<a name="line.1021"></a>
-<span class="sourceLineNo">1022</span>   * To clear any dead server with same 
host name and port of any online server<a name="line.1022"></a>
-<span class="sourceLineNo">1023</span>   */<a name="line.1023"></a>
-<span class="sourceLineNo">1024</span>  void 
clearDeadServersWithSameHostNameAndPortOfOnlineServer() {<a 
name="line.1024"></a>
-<span class="sourceLineNo">1025</span>    for (ServerName serverName : 
getOnlineServersList()) {<a name="line.1025"></a>
-<span class="sourceLineNo">1026</span>      
deadservers.cleanAllPreviousInstances(serverName);<a name="line.1026"></a>
-<span class="sourceLineNo">1027</span>    }<a name="line.1027"></a>
-<span class="sourceLineNo">1028</span>  }<a name="line.1028"></a>
-<span class="sourceLineNo">1029</span><a name="line.1029"></a>
-<span class="sourceLineNo">1030</span>  /**<a name="line.1030"></a>
-<span class="sourceLineNo">1031</span>   * Called by delete table and similar 
to notify the ServerManager that a region was removed.<a name="line.1031"></a>
-<span class="sourceLineNo">1032</span>   */<a name="line.1032"></a>
-<span class="sourceLineNo">1033</span>  public void removeRegion(final 
RegionInfo regionInfo) {<a name="line.1033"></a>
-<span class="sourceLineNo">1034</span>    final byte[] encodedName = 
regionInfo.getEncodedNameAsBytes();<a name="line.1034"></a>
-<span class="sourceLineNo">1035</span>    
storeFlushedSequenceIdsByRegion.remove(encodedName);<a name="line.1035"></a>
-<span class="sourceLineNo">1036</span>    
flushedSequenceIdByRegion.remove(encodedName);<a name="line.1036"></a>
-<span class="sourceLineNo">1037</span>  }<a name="line.1037"></a>
-<span class="sourceLineNo">1038</span><a name="line.1038"></a>
-<span class="sourceLineNo">1039</span>  @VisibleForTesting<a 
name="line.1039"></a>
-<span class="sourceLineNo">1040</span>  public boolean 
isRegionInServerManagerStates(final RegionInfo hri) {<a name="line.1040"></a>
-<span class="sourceLineNo">1041</span>    final byte[] encodedName = 
hri.getEncodedNameAsBytes();<a name="line.1041"></a>
-<span class="sourceLineNo">1042</span>    return 
(storeFlushedSequenceIdsByRegion.containsKey(encodedName)<a 
name="line.1042"></a>
-<span class="sourceLineNo">1043</span>        || 
flushedSequenceIdByRegion.containsKey(encodedName));<a name="line.1043"></a>
-<span class="sourceLineNo">1044</span>  }<a name="line.1044"></a>
-<span class="sourceLineNo">1045</span><a name="line.1045"></a>
-<span class="sourceLineNo">1046</span>  /**<a name="line.1046"></a>
-<span class="sourceLineNo">1047</span>   * Called by delete table and similar 
to notify the ServerManager that a region was removed.<a name="line.1047"></a>
-<span class="sourceLineNo">1048</span>   */<a name="line.1048"></a>
-<span class="sourceLineNo">1049</span>  public void removeRegions(final 
List&lt;RegionInfo&gt; regions) {<a name="line.1049"></a>
-<span class="sourceLineNo">1050</span>    for (RegionInfo hri: regions) {<a 
name="line.1050"></a>
-<span class="sourceLineNo">1051</span>      removeRegion(hri);<a 
name="line.1051"></a>
-<span class="sourceLineNo">1052</span>    }<a name="line.1052"></a>
-<span class="sourceLineNo">1053</span>  }<a name="line.1053"></a>
-<span class="sourceLineNo">1054</span>}<a name="line.1054"></a>
+<span class="sourceLineNo">558</span>   * Expire the passed server.  Add it to 
list of dead servers and queue a<a name="line.558"></a>
+<span class="sourceLineNo">559</span>   * shutdown processing.<a 
name="line.559"></a>
+<span class="sourceLineNo">560</span>   */<a name="line.560"></a>
+<span class="sourceLineNo">561</span>  public synchronized void 
expireServer(final ServerName serverName) {<a name="line.561"></a>
+<span class="sourceLineNo">562</span>    if 
(serverName.equals(master.getServerName())) {<a name="line.562"></a>
+<span class="sourceLineNo">563</span>      if (!(master.isAborted() || 
master.isStopped())) {<a name="line.563"></a>
+<span class="sourceLineNo">564</span>        master.stop("We lost our 
znode?");<a name="line.564"></a>
+<span class="sourceLineNo">565</span>      }<a name="line.565"></a>
+<span class="sourceLineNo">566</span>      return;<a name="line.566"></a>
+<span class="sourceLineNo">567</span>    }<a name="line.567"></a>
+<span class="sourceLineNo">568</span>    if 
(!master.isServerCrashProcessingEnabled()) {<a name="line.568"></a>
+<span class="sourceLineNo">569</span>      LOG.info("Master doesn't enable 
ServerShutdownHandler during initialization, "<a name="line.569"></a>
+<span class="sourceLineNo">570</span>          + "delay expiring server " + 
serverName);<a name="line.570"></a>
+<span class="sourceLineNo">571</span>      // Even we delay expire this 
server, we still need to handle Meta's RIT<a name="line.571"></a>
+<span class="sourceLineNo">572</span>      // that are against the crashed 
server; since when we do RecoverMetaProcedure,<a name="line.572"></a>
+<span class="sourceLineNo">573</span>      // the SCP is not enable yet and 
Meta's RIT may be suspend forever. See HBase-19287<a name="line.573"></a>
+<span class="sourceLineNo">574</span>      
master.getAssignmentManager().handleMetaRITOnCrashedServer(serverName);<a 
name="line.574"></a>
+<span class="sourceLineNo">575</span>      
this.queuedDeadServers.add(serverName);<a name="line.575"></a>
+<span class="sourceLineNo">576</span>      return;<a name="line.576"></a>
+<span class="sourceLineNo">577</span>    }<a name="line.577"></a>
+<span class="sourceLineNo">578</span>    if 
(this.deadservers.isDeadServer(serverName)) {<a name="line.578"></a>
+<span class="sourceLineNo">579</span>      // TODO: Can this happen?  It 
shouldn't be online in this case?<a name="line.579"></a>
+<span class="sourceLineNo">580</span>      LOG.warn("Expiration of " + 
serverName +<a name="line.580"></a>
+<span class="sourceLineNo">581</span>          " but server shutdown already 
in progress");<a name="line.581"></a>
+<span class="sourceLineNo">582</span>      return;<a name="line.582"></a>
+<span class="sourceLineNo">583</span>    }<a name="line.583"></a>
+<span class="sourceLineNo">584</span>    
moveFromOnlineToDeadServers(serverName);<a name="line.584"></a>
+<span class="sourceLineNo">585</span><a name="line.585"></a>
+<span class="sourceLineNo">586</span>    // If cluster is going down, yes, 
servers are going to be expiring; don't<a name="line.586"></a>
+<span class="sourceLineNo">587</span>    // process as a dead server<a 
name="line.587"></a>
+<span class="sourceLineNo">588</span>    if (isClusterShutdown()) {<a 
name="line.588"></a>
+<span class="sourceLineNo">589</span>      LOG.info("Cluster shutdown set; " + 
serverName +<a name="line.589"></a>
+<span class="sourceLineNo">590</span>        " expired; onlineServers=" + 
this.onlineServers.size());<a name="line.590"></a>
+<span class="sourceLineNo">591</span>      if (this.onlineServers.isEmpty()) 
{<a name="line.591"></a>
+<span class="sourceLineNo">592</span>        master.stop("Cluster shutdown 
set; onlineServer=0");<a name="line.592"></a>
+<span class="sourceLineNo">593</span>      }<a name="line.593"></a>
+<span class="sourceLineNo">594</span>      return;<a name="line.594"></a>
+<span class="sourceLineNo">595</span>    }<a name="line.595"></a>
+<span class="sourceLineNo">596</span>    LOG.info("Processing expiration of " 
+ serverName + " on " + this.master.getServerName());<a name="line.596"></a>
+<span class="sourceLineNo">597</span>    
master.getAssignmentManager().submitServerCrash(serverName, true);<a 
name="line.597"></a>
+<span class="sourceLineNo">598</span><a name="line.598"></a>
+<span class="sourceLineNo">599</span>    // Tell our listeners that a server 
was removed<a name="line.599"></a>
+<span class="sourceLineNo">600</span>    if (!this.listeners.isEmpty()) {<a 
name="line.600"></a>
+<span class="sourceLineNo">601</span>      for (ServerListener listener : 
this.listeners) {<a name="line.601"></a>
+<span class="sourceLineNo">602</span>        
listener.serverRemoved(serverName);<a name="line.602"></a>
+<span class="sourceLineNo">603</span>      }<a name="line.603"></a>
+<span class="sourceLineNo">604</span>    }<a name="line.604"></a>
+<span class="sourceLineNo">605</span>  }<a name="line.605"></a>
+<span class="sourceLineNo">606</span><a name="line.606"></a>
+<span class="sourceLineNo">607</span>  @VisibleForTesting<a 
name="line.607"></a>
+<span class="sourceLineNo">608</span>  public void 
moveFromOnlineToDeadServers(final ServerName sn) {<a name="line.608"></a>
+<span class="sourceLineNo">609</span>    synchronized (onlineServers) {<a 
name="line.609"></a>
+<span class="sourceLineNo">610</span>      if 
(!this.onlineServers.containsKey(sn)) {<a name="line.610"></a>
+<span class="sourceLineNo">611</span>        LOG.warn("Expiration of " + sn + 
" but server not online");<a name="line.611"></a>
+<span class="sourceLineNo">612</span>      }<a name="line.612"></a>
+<span class="sourceLineNo">613</span>      // Remove the server from the known 
servers lists and update load info BUT<a name="line.613"></a>
+<span class="sourceLineNo">614</span>      // add to deadservers first; do 
this so it'll show in dead servers list if<a name="line.614"></a>
+<span class="sourceLineNo">615</span>      // not in online servers list.<a 
name="line.615"></a>
+<span class="sourceLineNo">616</span>      this.deadservers.add(sn);<a 
name="line.616"></a>
+<span class="sourceLineNo">617</span>      this.onlineServers.remove(sn);<a 
name="line.617"></a>
+<span class="sourceLineNo">618</span>      onlineServers.notifyAll();<a 
name="line.618"></a>
+<span class="sourceLineNo">619</span>    }<a name="line.619"></a>
+<span class="sourceLineNo">620</span>    this.rsAdmins.remove(sn);<a 
name="line.620"></a>
+<span class="sourceLineNo">621</span>  }<a name="line.621"></a>
+<span class="sourceLineNo">622</span><a name="line.622"></a>
+<span class="sourceLineNo">623</span>  public synchronized void 
processDeadServer(final ServerName serverName, boolean shouldSplitWal) {<a 
name="line.623"></a>
+<span class="sourceLineNo">624</span>    // When assignment manager is 
cleaning up the zookeeper nodes and rebuilding the<a name="line.624"></a>
+<span class="sourceLineNo">625</span>    // in-memory region states, region 
servers could be down. Meta table can and<a name="line.625"></a>
+<span class="sourceLineNo">626</span>    // should be re-assigned, log 
splitting can be done too. However, it is better to<a name="line.626"></a>
+<span class="sourceLineNo">627</span>    // wait till the cleanup is done 
before re-assigning user regions.<a name="line.627"></a>
+<span class="sourceLineNo">628</span>    //<a name="line.628"></a>
+<span class="sourceLineNo">629</span>    // We should not wait in the server 
shutdown handler thread since it can clog<a name="line.629"></a>
+<span class="sourceLineNo">630</span>    // the handler threads and meta table 
could not be re-assigned in case<a name="line.630"></a>
+<span class="sourceLineNo">631</span>    // the corresponding server is down. 
So we queue them up here instead.<a name="line.631"></a>
+<span class="sourceLineNo">632</span>    if 
(!master.getAssignmentManager().isFailoverCleanupDone()) {<a 
name="line.632"></a>
+<span class="sourceLineNo">633</span>      requeuedDeadServers.put(serverName, 
shouldSplitWal);<a name="line.633"></a>
+<span class="sourceLineNo">634</span>      return;<a name="line.634"></a>
+<span class="sourceLineNo">635</span>    }<a name="line.635"></a>
+<span class="sourceLineNo">636</span><a name="line.636"></a>
+<span class="sourceLineNo">637</span>    this.deadservers.add(serverName);<a 
name="line.637"></a>
+<span class="sourceLineNo">638</span>    
master.getAssignmentManager().submitServerCrash(serverName, shouldSplitWal);<a 
name="line.638"></a>
+<span class="sourceLineNo">639</span>  }<a name="line.639"></a>
+<span class="sourceLineNo">640</span><a name="line.640"></a>
+<span class="sourceLineNo">641</span>  /**<a name="line.641"></a>
+<span class="sourceLineNo">642</span>   * Process the servers which died 
during master's initialization. It will be<a name="line.642"></a>
+<span class="sourceLineNo">643</span>   * called after HMaster#assignMeta and 
AssignmentManager#joinCluster.<a name="line.643"></a>
+<span class="sourceLineNo">644</span>   * */<a name="line.644"></a>
+<span class="sourceLineNo">645</span>  synchronized void 
processQueuedDeadServers() {<a name="line.645"></a>
+<span class="sourceLineNo">646</span>    if 
(!master.isServerCrashProcessingEnabled()) {<a name="line.646"></a>
+<span class="sourceLineNo">647</span>      LOG.info("Master hasn't enabled 
ServerShutdownHandler");<a name="line.647"></a>
+<span class="sourceLineNo">648</span>    }<a name="line.648"></a>
+<span class="sourceLineNo">649</span>    Iterator&lt;ServerName&gt; 
serverIterator = queuedDeadServers.iterator();<a name="line.649"></a>
+<span class="sourceLineNo">650</span>    while (serverIterator.hasNext()) {<a 
name="line.650"></a>
+<span class="sourceLineNo">651</span>      ServerName tmpServerName = 
serverIterator.next();<a name="line.651"></a>
+<span class="sourceLineNo">652</span>      expireServer(tmpServerName);<a 
name="line.652"></a>
+<span class="sourceLineNo">653</span>      serverIterator.remove();<a 
name="line.653"></a>
+<span class="sourceLineNo">654</span>      
requeuedDeadServers.remove(tmpServerName);<a name="line.654"></a>
+<span class="sourceLineNo">655</span>    }<a name="line.655"></a>
+<span class="sourceLineNo">656</span><a name="line.656"></a>
+<span class="sourceLineNo">657</span>    if 
(!master.getAssignmentManager().isFailoverCleanupDone()) {<a 
name="line.657"></a>
+<span class="sourceLineNo">658</span>      if (LOG.isTraceEnabled()) {<a 
name="line.658"></a>
+<span class="sourceLineNo">659</span>        LOG.trace("AssignmentManager 
failover cleanup not done.");<a name="line.659"></a>
+<span class="sourceLineNo">660</span>      }<a name="line.660"></a>
+<span class="sourceLineNo">661</span>    }<a name="line.661"></a>
+<span class="sourceLineNo">662</span><a name="line.662"></a>
+<span class="sourceLineNo">663</span>    for (Map.Entry&lt;ServerName, 
Boolean&gt; entry : requeuedDeadServers.entrySet()) {<a name="line.663"></a>
+<span class="sourceLineNo">664</span>      processDeadServer(entry.getKey(), 
entry.getValue());<a name="line.664"></a>
+<span class="sourceLineNo">665</span>    }<a name="line.665"></a>
+<span class="sourceLineNo">666</span>    requeuedDeadServers.clear();<a 
name="line.666"></a>
+<span class="sourceLineNo">667</span>  }<a name="line.667"></a>
+<span class="sourceLineNo">668</span><a name="line.668"></a>
+<span class="sourceLineNo">669</span>  /*<a name="line.669"></a>
+<span class="sourceLineNo">670</span>   * Remove the server from the drain 
list.<a name="line.670"></a>
+<span class="sourceLineNo">671</span>   */<a name="line.671"></a>
+<span class="sourceLineNo">672</span>  public synchronized boolean 
removeServerFromDrainList(final ServerName sn) {<a name="line.672"></a>
+<span class="sourceLineNo">673</span>    // Warn if the server (sn) is not 
online.  ServerName is of the form:<a name="line.673"></a>
+<span class="sourceLineNo">674</span>    // &lt;hostname&gt; , &lt;port&gt; , 
&lt;startcode&gt;<a name="line.674"></a>
+<span class="sourceLineNo">675</span><a name="line.675"></a>
+<span class="sourceLineNo">676</span>    if (!this.isServerOnline(sn)) {<a 
name="line.676"></a>
+<span class="sourceLineNo">677</span>      LOG.warn("Server " + sn + " is not 
currently online. " +<a name="line.677"></a>
+<span class="sourceLineNo">678</span>               "Removing from draining 
list anyway, as requested.");<a name="line.678"></a>
+<span class="sourceLineNo">679</span>    }<a name="line.679"></a>
+<span class="sourceLineNo">680</span>    // Remove the server from the 
draining servers lists.<a name="line.680"></a>
+<span class="sourceLineNo">681</span>    return 
this.drainingServers.remove(sn);<a name="line.681"></a>
+<span class="sourceLineNo">682</span>  }<a name="line.682"></a>
+<span class="sourceLineNo">683</span><a name="line.683"></a>
+<span class="sourceLineNo">684</span>  /**<a name="line.684"></a>
+<span class="sourceLineNo">685</span>   * Add the server to the drain list.<a 
name="line.685"></a>
+<span class="sourceLineNo">686</span>   * @param sn<a name="line.686"></a>
+<span class="sourceLineNo">687</span>   * @return True if the server is added 
or the server is already on the drain list.<a name="line.687"></a>
+<span class="sourceLineNo">688</span>   */<a name="line.688"></a>
+<span class="sourceLineNo">689</span>  public synchronized boolean 
addServerToDrainList(final ServerName sn) {<a name="line.689"></a>
+<span class="sourceLineNo">690</span>    // Warn if the server (sn) is not 
online.  ServerName is of the form:<a name="line.690"></a>
+<span class="sourceLineNo">691</span>    // &lt;hostname&gt; , &lt;port&gt; , 
&lt;startcode&gt;<a name="line.691"></a>
+<span class="sourceLineNo">692</span><a name="line.692"></a>
+<span class="sourceLineNo">693</span>    if (!this.isServerOnline(sn)) {<a 
name="line.693"></a>
+<span class="sourceLineNo">694</span>      LOG.warn("Server " + sn + " is not 
currently online. " +<a name="line.694"></a>
+<span class="sourceLineNo">695</span>               "Ignoring request to add 
it to draining list.");<a name="line.695"></a>
+<span class="sourceLineNo">696</span>      return false;<a name="line.696"></a>
+<span class="sourceLineNo">697</span>    }<a name="line.697"></a>
+<span class="sourceLineNo">698</span>    // Add the server to the draining 
servers lists, if it's not already in<a name="line.698"></a>
+<span class="sourceLineNo">699</span>    // it.<a name="line.699"></a>
+<span class="sourceLineNo">700</span>    if 
(this.drainingServers.contains(sn)) {<a name="line.700"></a>
+<span class="sourceLineNo">701</span>      LOG.warn("Server " + sn + " is 
already in the draining server list." +<a name="line.701"></a>
+<span class="sourceLineNo">702</span>               "Ignoring request to add 
it again.");<a name="line.702"></a>
+<span class="sourceLineNo">703</span>      return true;<a name="line.703"></a>
+<span class="sourceLineNo">704</span>    }<a name="line.704"></a>
+<span class="sourceLineNo">705</span>    LOG.info("Server " + sn + " added to 
draining server list.");<a name="line.705"></a>
+<span class="sourceLineNo">706</span>    return 
this.drainingServers.add(sn);<a name="line.706"></a>
+<span class="sourceLineNo">707</span>  }<a name="line.707"></a>
+<span class="sourceLineNo">708</span><a name="line.708"></a>
+<span class="sourceLineNo">709</span>  // RPC methods to region servers<a 
name="line.709"></a>
+<span class="sourceLineNo">710</span><a name="line.710"></a>
+<span class="sourceLineNo">711</span>  private HBaseRpcController 
newRpcController() {<a name="line.711"></a>
+<span class="sourceLineNo">712</span>    return rpcControllerFactory == null ? 
null : rpcControllerFactory.newController();<a name="line.712"></a>
+<span class="sourceLineNo">713</span>  }<a name="line.713"></a>
+<span class="sourceLineNo">714</span><a name="line.714"></a>
+<span class="sourceLineNo">715</span>  /**<a name="line.715"></a>
+<span class="sourceLineNo">716</span>   * Sends a WARMUP RPC to the specified 
server to warmup the specified region.<a name="line.716"></a>
+<span class="sourceLineNo">717</span>   * &lt;p&gt;<a name="line.717"></a>
+<span class="sourceLineNo">718</span>   * A region server could reject the 
close request because it either does not<a name="line.718"></a>
+<span class="sourceLineNo">719</span>   * have the specified region or the 
region is being split.<a name="line.719"></a>
+<span class="sourceLineNo">720</span>   * @param server server to warmup a 
region<a name="line.720"></a>
+<span class="sourceLineNo">721</span>   * @param region region to  warmup<a 
name="line.721"></a>
+<span class="sourceLineNo">722</span>   */<a name="line.722"></a>
+<span class="sourceLineNo">723</span>  public void sendRegionWarmup(ServerName 
server,<a name="line.723"></a>
+<span class="sourceLineNo">724</span>      RegionInfo region) {<a 
name="line.724"></a>
+<span class="sourceLineNo">725</span>    if (server == null) return;<a 
name="line.725"></a>
+<span class="sourceLineNo">726</span>    try {<a name="line.726"></a>
+<span class="sourceLineNo">727</span>      AdminService.BlockingInterface 
admin = getRsAdmin(server);<a name="line.727"></a>
+<span class="sourceLineNo">728</span>      HBaseRpcController controller = 
newRpcController();<a name="line.728"></a>
+<span class="sourceLineNo">729</span>      
ProtobufUtil.warmupRegion(controller, admin, region);<a name="line.729"></a>
+<span class="sourceLineNo">730</span>    } catch (IOException e) {<a 
name="line.730"></a>
+<span class="sourceLineNo">731</span>      LOG.error("Received exception in 
RPC for warmup server:" +<a name="line.731"></a>
+<span class="sourceLineNo">732</span>        server + "region: " + region +<a 
name="line.732"></a>
+<span class="sourceLineNo">733</span>        "exception: " + e);<a 
name="line.733"></a>
+<span class="sourceLineNo">734</span>    }<a name="line.734"></a>
+<span class="sourceLineNo">735</span>  }<a name="line.735"></a>
+<span class="sourceLineNo">736</span><a name="line.736"></a>
+<span class="sourceLineNo">737</span>  /**<a name="line.737"></a>
+<span class="sourceLineNo">738</span>   * Contacts a region server and waits 
up to timeout ms<a name="line.738"></a>
+<span class="sourceLineNo">739</span>   * to close the region.  This bypasses 
the active hmaster.<a name="line.739"></a>
+<span class="sourceLineNo">740</span>   */<a name="line.740"></a>
+<span class="sourceLineNo">741</span>  public static void 
closeRegionSilentlyAndWait(ClusterConnection connection,<a name="line.741"></a>
+<span class="sourceLineNo">742</span>    ServerName server, RegionInfo region, 
long timeout) throws IOException, InterruptedException {<a name="line.742"></a>
+<span class="sourceLineNo">743</span>    AdminService.BlockingInterface rs = 
connection.getAdmin(server);<a name="line.743"></a>
+<span class="sourceLineNo">744</span>    HBaseRpcController controller = 
connection.getRpcControllerFactory().newController();<a name="line.744"></a>
+<span class="sourceLineNo">745</span>    try {<a name="line.745"></a>
+<span class="sourceLineNo">746</span>      
ProtobufUtil.closeRegion(controller, rs, server, region.getRegionName());<a 
name="line.746"></a>
+<span class="sourceLineNo">747</span>    } catch (IOException e) {<a 
name="line.747"></a>
+<span class="sourceLineNo">748</span>      LOG.warn("Exception when closing 
region: " + region.getRegionNameAsString(), e);<a name="line.748"></a>
+<span class="sourceLineNo">749</span>    }<a name="line.749"></a>
+<span class="sourceLineNo">750</span>    long expiration = timeout + 
System.currentTimeMillis();<a name="line.750"></a>
+<span class="sourceLineNo">751</span>    while (System.currentTimeMillis() 
&lt; expiration) {<a name="line.751"></a>
+<span class="sourceLineNo">752</span>      controller.reset();<a 
name="line.752"></a>
+<span class="sourceLineNo">753</span>      try {<a name="line.753"></a>
+<span class="sourceLineNo">754</span>        RegionInfo rsRegion =<a 
name="line.754"></a>
+<span class="sourceLineNo">755</span>          
ProtobufUtil.getRegionInfo(controller, rs, region.getRegionName());<a 
name="line.755"></a>
+<span class="sourceLineNo">756</span>        if (rsRegion == null) return;<a 
name="line.756"></a>
+<span class="sourceLineNo">757</span>      } catch (IOException ioe) {<a 
name="line.757"></a>
+<span class="sourceLineNo">758</span>        if (ioe instanceof 
NotServingRegionException) // no need to retry again<a name="line.758"></a>
+<span class="sourceLineNo">759</span>          return;<a name="line.759"></a>
+<span class="sourceLineNo">760</span>        LOG.warn("Exception when 
retrieving regioninfo from: "<a name="line.760"></a>
+<span class="sourceLineNo">761</span>          + 
region.getRegionNameAsString(), ioe);<a name="line.761"></a>
+<span class="sourceLineNo">762</span>      }<a name="line.762"></a>
+<span class="sourceLineNo">763</span>      Thread.sleep(1000);<a 
name="line.763"></a>
+<span class="sourceLineNo">764</span>    }<a name="line.764"></a>
+<span class="sourceLineNo">765</span>    throw new IOException("Region " + 
region + " failed to close within"<a name="line.765"></a>
+<span class="sourceLineNo">766</span>        + " timeout " + timeout);<a 
name="line.766"></a>
+<span class="sourceLineNo">767</span>  }<a name="line.767"></a>
+<span class="sourceLineNo">768</span><a name="line.768"></a>
+<span class="sourceLineNo">769</span>  /**<a name="line.769"></a>
+<span class="sourceLineNo">770</span>   * @param sn<a name="line.770"></a>
+<span class="sourceLineNo">771</span>   * @return Admin interface for the 
remote regionserver named &lt;code&gt;sn&lt;/code&gt;<a name="line.771"></a>
+<span class="sourceLineNo">772</span>   * @throws IOException<a 
name="line.772"></a>
+<span class="sourceLineNo">773</span>   * @throws RetriesExhaustedException 
wrapping a ConnectException if failed<a name="line.773"></a>
+<span class="sourceLineNo">774</span>   */<a name="line.774"></a>
+<span class="sourceLineNo">775</span>  public AdminService.BlockingInterface 
getRsAdmin(final ServerName sn)<a name="line.775"></a>
+<span class="sourceLineNo">776</span>  throws IOException {<a 
name="line.776"></a>
+<span class="sourceLineNo">777</span>    AdminService.BlockingInterface admin 
= this.rsAdmins.get(sn);<a name="line.777"></a>
+<span class="sourceLineNo">778</span>    if (admin == null) {<a 
name="line.778"></a>
+<span class="sourceLineNo">779</span>      LOG.debug("New admin connection to 
" + sn.toString());<a name="line.779"></a>
+<span class="sourceLineNo">780</span>      if 
(sn.equals(master.getServerName()) &amp;&amp; master instanceof HRegionServer) 
{<a name="line.780"></a>
+<span class="sourceLineNo">781</span>        // A master is also a region 
server now, see HBASE-10569 for details<a name="line.781"></a>
+<span class="sourceLineNo">782</span>        admin = 
((HRegionServer)master).getRSRpcServices();<a name="line.782"></a>
+<span class="sourceLineNo">783</span>      } else {<a name="line.783"></a>
+<span class="sourceLineNo">784</span>        admin = 
this.connection.getAdmin(sn);<a name="line.784"></a>
+<span class="sourceLineNo">785</span>      }<a name="line.785"></a>
+<span class="sourceLineNo">786</span>      this.rsAdmins.put(sn, admin);<a 
name="line.786"></a>
+<span class="sourceLineNo">787</span>    }<a name="line.787"></a>
+<span class="sourceLineNo">788</span>    return admin;<a name="line.788"></a>
+<span class="sourceLineNo">789</span>  }<a name="line.789"></a>
+<span class="sourceLineNo">790</span><a name="line.790"></a>
+<span class="sourceLineNo">791</span>  /**<a name="line.791"></a>
+<span class="sourceLineNo">792</span>   * Calculate min necessary to start. 
This is not an absolute. It is just<a name="line.792"></a>
+<span class="sourceLineNo">793</span>   * a friction that will cause us hang 
around a bit longer waiting on<a name="line.793"></a>
+<span class="sourceLineNo">794</span>   * RegionServers to check-in.<a 
name="line.794"></a>
+<span class="sourceLineNo">795</span>   */<a name="line.795"></a>
+<span class="sourceLineNo">796</span>  private int getMinToStart() {<a 
name="line.796"></a>
+<span class="sourceLineNo">797</span>    // One server should be enough to get 
us off the ground.<a name="line.797"></a>
+<span class="sourceLineNo">798</span>    int requiredMinToStart = 1;<a 
name="line.798"></a>
+<span class="sourceLineNo">799</span>    if 
(LoadBalancer.isTablesOnMaster(master.getConfiguration())) {<a 
name="line.799"></a>
+<span class="sourceLineNo">800</span>      if 
(LoadBalancer.isSystemTablesOnlyOnMaster(master.getConfiguration())) {<a 
name="line.800"></a>
+<span class="sourceLineNo">801</span>        // If Master is carrying regions 
but NOT user-space regions, it<a name="line.801"></a>
+<span class="sourceLineNo">802</span>        // still shows as a 'server'. We 
need at least one more server to check<a name="line.802"></a>
+<span class="sourceLineNo">803</span>        // in before we can start up so 
set defaultMinToStart to 2.<a name="line.803"></a>
+<span class="sourceLineNo">804</span>        requiredMinToStart = 
requiredMinToStart + 1;<a name="line.804"></a>
+<span class="sourceLineNo">805</span>      }<a name="line.805"></a>
+<span class="sourceLineNo">806</span>    }<a name="line.806"></a>
+<span class="sourceLineNo">807</span>    int minToStart = 
this.master.getConfiguration().getInt(WAIT_ON_REGIONSERVERS_MINTOSTART, -1);<a 
name="line.807"></a>
+<span class="sourceLineNo">808</span>    // Ensure we are never less than 
requiredMinToStart else stuff won't work.<a name="line.808"></a>
+<span class="sourceLineNo">809</span>    return minToStart == -1 || minToStart 
&lt; requiredMinToStart? requiredMinToStart: minToStart;<a name="line.809"></a>
+<span class="sourceLineNo">810</span>  }<a name="line.810"></a>
+<span class="sourceLineNo">811</span><a name="line.811"></a>
+<span class="sourceLineNo">812</span>  /**<a name="line.812"></a>
+<span class="sourceLineNo">813</span>   * Wait for the region servers to 
report in.<a name="line.813"></a>
+<span class="sourceLineNo">814</span>   * We will wait until one of this 
condition is met:<a name="line.814"></a>
+<span class="sourceLineNo">815</span>   *  - the master is stopped<a 
name="line.815"></a>
+<span class="sourceLineNo">816</span>   *  - the 
'hbase.master.wait.on.regionservers.maxtostart' number of<a name="line.816"></a>
+<span class="sourceLineNo">817</span>   *    region servers is reached<a 
name="line.817"></a>
+<span class="sourceLineNo">818</span>   *  - the 
'hbase.master.wait.on.regionservers.mintostart' is reached AND<a 
name="line.818"></a>
+<span class="sourceLineNo">819</span>   *   there have been no new region 
server in for<a name="line.819"></a>
+<span class="sourceLineNo">820</span>   *      
'hbase.master.wait.on.regionservers.interval' time AND<a name="line.820"></a>
+<span class="sourceLineNo">821</span>   *   the 
'hbase.master.wait.on.regionservers.timeout' is reached<a name="line.821"></a>
+<span class="sourceLineNo">822</span>   *<a name="line.822"></a>
+<span class="sourceLineNo">823</span>   * @throws InterruptedException<a 
name="line.823"></a>
+<span class="sourceLineNo">824</span>   */<a name="line.824"></a>
+<span class="sourceLineNo">825</span>  public void 
waitForRegionServers(MonitoredTask status) throws InterruptedException {<a 
name="line.825"></a>
+<span class="sourceLineNo">826</span>    final long interval = 
this.master.getConfiguration().<a name="line.826"></a>
+<span class="sourceLineNo">827</span>        
getLong(WAIT_ON_REGIONSERVERS_INTERVAL, 1500);<a name="line.827"></a>
+<span class="sourceLineNo">828</span>    final long timeout = 
this.master.getConfiguration().<a name="line.828"></a>
+<span class="sourceLineNo">829</span>        
getLong(WAIT_ON_REGIONSERVERS_TIMEOUT, 4500);<a name="line.829"></a>
+<span class="sourceLineNo">830</span>    // Min is not an absolute; just a 
friction making us wait longer on server checkin.<a name="line.830"></a>
+<span class="sourceLineNo">831</span>    int minToStart = getMinToStart();<a 
name="line.831"></a>
+<span class="sourceLineNo">832</span>    int maxToStart = 
this.master.getConfiguration().<a name="line.832"></a>
+<span class="sourceLineNo">833</span>        
getInt(WAIT_ON_REGIONSERVERS_MAXTOSTART, Integer.MAX_VALUE);<a 
name="line.833"></a>
+<span class="sourceLineNo">834</span>    if (maxToStart &lt; minToStart) {<a 
name="line.834"></a>
+<span class="sourceLineNo">835</span>      LOG.warn(String.format("The value 
of '%s' (%d) is set less than '%s' (%d), ignoring.",<a name="line.835"></a>
+<span class="sourceLineNo">836</span>          
WAIT_ON_REGIONSERVERS_MAXTOSTART, maxToStart,<a name="line.836"></a>
+<span class="sourceLineNo">837</span>          
WAIT_ON_REGIONSERVERS_MINTOSTART, minToStart));<a name="line.837"></a>
+<span class="sourceLineNo">838</span>      maxToStart = Integer.MAX_VALUE;<a 
name="line.838"></a>
+<span class="sourceLineNo">839</span>    }<a name="line.839"></a>
+<span class="sourceLineNo">840</span><a name="line.840"></a>
+<span class="sourceLineNo">841</span>    long now =  
System.currentTimeMillis();<a name="line.841"></a>
+<span class="sourceLineNo">842</span>    final long startTime = now;<a 
name="line.842"></a>
+<span class="sourceLineNo">843</span>    long slept = 0;<a name="line.843"></a>
+<span class="sourceLineNo">844</span>    long lastLogTime = 0;<a 
name="line.844"></a>
+<span class="sourceLineNo">845</span>    long lastCountChange = startTime;<a 
name="line.845"></a>
+<span class="sourceLineNo">846</span>    int count = countOfRegionServers();<a 
name="line.846"></a>
+<span class="sourceLineNo">847</span>    int oldCount = 0;<a 
name="line.847"></a>
+<span class="sourceLineNo">848</span>    // This while test is a little hard 
to read. We try to comment it in below but in essence:<a name="line.848"></a>
+<span class="sourceLineNo">849</span>    // Wait if Master is not stopped and 
the number of regionservers that have checked-in is<a name="line.849"></a>
+<span class="sourceLineNo">850</span>    // less than the maxToStart. Both of 
these conditions will be true near universally.<a name="line.850"></a>
+<span class="sourceLineNo">851</span>    // Next, we will keep cycling if ANY 
of the following three conditions are true:<a name="line.851"></a>
+<span class="sourceLineNo">852</span>    // 1. The time since a regionserver 
registered is &lt; interval (means servers are actively checking in).<a 
name="line.852"></a>
+<span class="sourceLineNo">853</span>    // 2. We are under the total 
timeout.<a name="line.853"></a>
+<span class="sourceLineNo">854</span>    // 3. The count of servers is &lt; 
minimum.<a name="line.854"></a>
+<span class="sourceLineNo">855</span>    for (ServerListener listener: 
this.listeners) {<a name="line.855"></a>
+<span class="sourceLineNo">856</span>      listener.waiting();<a 
name="line.856"></a>
+<span class="sourceLineNo">857</span>    }<a name="line.857"></a>
+<span class="sourceLineNo">858</span>    while (!this.master.isStopped() 
&amp;&amp; !isClusterShutdown() &amp;&amp; count &lt; maxToStart &amp;&amp;<a 
name="line.858"></a>
+<span class="sourceLineNo">859</span>        ((lastCountChange + interval) 
&gt; now || timeout &gt; slept || count &lt; minToStart)) {<a 
name="line.859"></a>
+<span class="sourceLineNo">860</span>      // Log some info at every interval 
time or if there is a change<a name="line.860"></a>
+<span class="sourceLineNo">861</span>      if (oldCount != count || 
lastLogTime + interval &lt; now) {<a name="line.861"></a>
+<span class="sourceLineNo">862</span>        lastLogTime = now;<a 
name="line.862"></a>
+<span class="sourceLineNo">863</span>        String msg =<a 
name="line.863"></a>
+<span class="sourceLineNo">864</span>            "Waiting on regionserver 
count=" + count + "; waited="+<a name="line.864"></a>
+<span class="sourceLineNo">865</span>                slept + "ms, expecting 
min=" + minToStart + " server(s), max="+ getStrForMax(maxToStart) +<a 
name="line.865"></a>
+<span class="sourceLineNo">866</span>                " server(s), " + 
"timeout=" + timeout + "ms, lastChange=" + (lastCountChange - now) + "ms";<a 
name="line.866"></a>
+<span class="sourceLineNo">867</span>        LOG.info(msg);<a 
name="line.867"></a>
+<span class="sourceLineNo">868</span>        status.setStatus(msg);<a 
name="line.868"></a>
+<span class="sourceLineNo">869</span>      }<a name="line.869"></a>
+<span class="sourceLineNo">870</span><a name="line.870"></a>
+<span class="sourceLineNo">871</span>      // We sleep for some time<a 
name="line.871"></a>
+<span class="sourceLineNo">872</span>      final long sleepTime = 50;<a 
name="line.872"></a>
+<span class="sourceLineNo">873</span>      Thread.sleep(sleepTime);<a 
name="line.873"></a>
+<span class="sourceLineNo">874</span>      now =  
System.currentTimeMillis();<a name="line.874"></a>
+<span class="sourceLineNo">875</span>      slept = now - startTime;<a 
name="line.875"></a>
+<span class="sourceLineNo">876</span><a name="line.876"></a>
+<span class="sourceLineNo">877</span>      oldCount = count;<a 
name="line.877"></a>
+<span class="sourceLineNo">878</span>      count = countOfRegionServers();<a 
name="line.878"></a>
+<span class="sourceLineNo">879</span>      if (count != oldCount) {<a 
name="line.879"></a>
+<span class="sourceLineNo">880</span>        lastCountChange = now;<a 
name="line.880"></a>
+<span class="sourceLineNo">881</span>      }<a name="line.881"></a>
+<span class="sourceLineNo">882</span>    }<a name="line.882"></a>
+<span class="sourceLineNo">883</span>    // Did we exit the loop because 
cluster is going down?<a name="line.883"></a>
+<span class="sourceLineNo">884</span>    if (isClusterShutdown()) {<a 
name="line.884"></a>
+<span class="sourceLineNo">885</span>      this.master.stop("Cluster 
shutdown");<a name="line.885"></a>
+<span class="sourceLineNo">886</span>    }<a name="line.886"></a>
+<span class="sourceLineNo">887</span>    LOG.info("Finished waiting on 
RegionServer count=" + count + "; waited=" + slept + "ms," +<a 
name="line.887"></a>
+<span class="sourceLineNo">888</span>        " expected min=" + minToStart + " 
server(s), max=" +  getStrForMax(maxToStart) + " server(s),"+<a 
name="line.888"></a>
+<span class="sourceLineNo">889</span>        " master is "+ 
(this.master.isStopped() ? "stopped.": "running"));<a name="line.889"></a>
+<span class="sourceLineNo">890</span>  }<a name="line.890"></a>
+<span class="sourceLineNo">891</span><a name="line.891"></a>
+<span class="sourceLineNo">892</span>  private String getStrForMax(final int 
max) {<a name="line.892"></a>
+<span class="sourceLineNo">893</span>    return max == Integer.MAX_VALUE? 
"NO_LIMIT": Integer.toString(max);<a name="line.893"></a>
+<span class="sourceLineNo">894</span>  }<a name="line.894"></a>
+<span class="sourceLineNo">895</span><a name="line.895"></a>
+<span class="sourceLineNo">896</span>  /**<a name="line.896"></a>
+<span class="sourceLineNo">897</span>   * @return A copy of the internal list 
of online servers.<a name="line.897"></a>
+<span class="sourceLineNo">898</span>   */<a name="line.898"></a>
+<span class="sourceLineNo">899</span>  public List&lt;ServerName&gt; 
getOnlineServersList() {<a name="line.899"></a>
+<span class="sourceLineNo">900</span>    // TODO: optimize the load balancer 
call so we don't need to make a new list<a name="line.900"></a>
+<span class="sourceLineNo">901</span>    // TODO: FIX. THIS IS POPULAR CALL.<a 
name="line.901"></a>
+<span class="sourceLineNo">902</span>    return new 
ArrayList&lt;&gt;(this.onlineServers.keySet());<a name="line.902"></a>
+<span class="sourceLineNo">903</span>  }<a name="line.903"></a>
+<span class="sourceLineNo">904</span><a name="line.904"></a>
+<span class="sourceLineNo">905</span>  /**<a name="line.905"></a>
+<span class="sourceLineNo">906</span>   * @param keys The target server name<a 
name="line.906"></a>
+<span class="sourceLineNo">907</span>   * @param idleServerPredicator 
Evaluates the server on the given load<a name="line.907"></a>
+<span class="sourceLineNo">908</span>   * @return A copy of the internal list 
of online servers matched by the predicator<a name="line.908"></a>
+<span class="sourceLineNo">909</span>   */<a name="line.909"></a>
+<span class="sourceLineNo">910</span>  public List&lt;ServerName&gt; 
getOnlineServersListWithPredicator(List&lt;ServerName&gt; keys,<a 
name="line.910"></a>
+<span class="sourceLineNo">911</span>    Predicate&lt;ServerMetrics&gt; 
idleServerPredicator) {<a name="line.911"></a>
+<span class="sourceLineNo">912</span>    List&lt;ServerName&gt; names = new 
ArrayList&lt;&gt;();<a name="line.912"></a>
+<span class="sourceLineNo">913</span>    if (keys != null &amp;&amp; 
idleServerPredicator != null) {<a name="line.913"></a>
+<span class="sourceLineNo">914</span>      keys.forEach(name -&gt; {<a 
name="line.914"></a>
+<span class="sourceLineNo">915</span>        ServerMetrics load = 
onlineServers.get(name);<a name="line.915"></a>
+<span class="sourceLineNo">916</span>        if (load != null) {<a 
name="line.916"></a>
+<span class="sourceLineNo">917</span>          if 
(idleServerPredicator.test(load)) {<a name="line.917"></a>
+<span class="sourceLineNo">918</span>            names.add(name);<a 
name="line.918"></a>
+<span class="sourceLineNo">919</span>          }<a name="line.919"></a>
+<span class="sourceLineNo">920</span>        }<a name="line.920"></a>
+<span class="sourceLineNo">921</span>      });<a name="line.921"></a>
+<span class="sourceLineNo">922</span>    }<a name="line.922"></a>
+<span class="sourceLineNo">923</span>    return names;<a name="line.923"></a>
+<span class="sourceLineNo">924</span>  }<a name="line.924"></a>
+<span class="sourceLineNo">925</span><a name="line.925"></a>
+<span class="sourceLineNo">926</span>  /**<a name="line.926"></a>
+<span class="sourceLineNo">927</span>   * @return A copy of the internal list 
of draining servers.<a name="line.927"></a>
+<span class="sourceLineNo">928</span>   */<a name="line.928"></a>
+<span class="sourceLineNo">929</span>  public List&lt;ServerName&gt; 
getDrainingServersList() {<a name="line.929"></a>
+<span class="sourceLineNo">930</span>    return new 
ArrayList&lt;&gt;(this.drainingServers);<a name="line.930"></a>
+<span class="sourceLineNo">931</span>  }<a name="line.931"></a>
+<span class="sourceLineNo">932</span><a name="line.932"></a>
+<span class="sourceLineNo">933</span>  /**<a name="line.933"></a>
+<span class="sourceLineNo">934</span>   * @return A copy of the internal set 
of deadNotExpired servers.<a name="line.934"></a>
+<span class="sourceLineNo">935</span>   */<a name="line.935"></a>

<TRUNCATED>

Reply via email to