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From git-site-r...@apache.org
Subject [27/44] hbase-site git commit: Published site at .
Date Tue, 30 Jan 2018 15:18:35 GMT
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/a3fb6d74/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.html
index e2f4a39..b49f000 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/AssignmentManager.html
@@ -457,1482 +457,1468 @@
 <span class="sourceLineNo">449</span>    return metaLoadEvent.isReady();<a name="line.449"></a>
 <span class="sourceLineNo">450</span>  }<a name="line.450"></a>
 <span class="sourceLineNo">451</span><a name="line.451"></a>
-<span class="sourceLineNo">452</span>  // ============================================================================================<a name="line.452"></a>
-<span class="sourceLineNo">453</span>  //  TODO: Sync helpers<a name="line.453"></a>
-<span class="sourceLineNo">454</span>  // ============================================================================================<a name="line.454"></a>
-<span class="sourceLineNo">455</span>  public void assignMeta(final RegionInfo metaRegionInfo) throws IOException {<a name="line.455"></a>
-<span class="sourceLineNo">456</span>    assignMeta(metaRegionInfo, null);<a name="line.456"></a>
-<span class="sourceLineNo">457</span>  }<a name="line.457"></a>
-<span class="sourceLineNo">458</span><a name="line.458"></a>
-<span class="sourceLineNo">459</span>  public void assignMeta(final RegionInfo metaRegionInfo, final ServerName serverName)<a name="line.459"></a>
-<span class="sourceLineNo">460</span>      throws IOException {<a name="line.460"></a>
-<span class="sourceLineNo">461</span>    assert isMetaRegion(metaRegionInfo) : "unexpected non-meta region " + metaRegionInfo;<a name="line.461"></a>
-<span class="sourceLineNo">462</span>    AssignProcedure proc;<a name="line.462"></a>
-<span class="sourceLineNo">463</span>    if (serverName != null) {<a name="line.463"></a>
-<span class="sourceLineNo">464</span>      LOG.debug("Try assigning Meta " + metaRegionInfo + " to " + serverName);<a name="line.464"></a>
-<span class="sourceLineNo">465</span>      proc = createAssignProcedure(metaRegionInfo, serverName);<a name="line.465"></a>
-<span class="sourceLineNo">466</span>    } else {<a name="line.466"></a>
-<span class="sourceLineNo">467</span>      LOG.debug("Assigning " + metaRegionInfo.getRegionNameAsString());<a name="line.467"></a>
-<span class="sourceLineNo">468</span>      proc = createAssignProcedure(metaRegionInfo);<a name="line.468"></a>
-<span class="sourceLineNo">469</span>    }<a name="line.469"></a>
-<span class="sourceLineNo">470</span>    ProcedureSyncWait.submitAndWaitProcedure(master.getMasterProcedureExecutor(), proc);<a name="line.470"></a>
-<span class="sourceLineNo">471</span>  }<a name="line.471"></a>
-<span class="sourceLineNo">472</span><a name="line.472"></a>
-<span class="sourceLineNo">473</span>  /**<a name="line.473"></a>
-<span class="sourceLineNo">474</span>   * Start a new thread to check if there are region servers whose versions are higher than others.<a name="line.474"></a>
-<span class="sourceLineNo">475</span>   * If so, move all system table regions to RS with the highest version to keep compatibility.<a name="line.475"></a>
-<span class="sourceLineNo">476</span>   * The reason is, RS in new version may not be able to access RS in old version when there are<a name="line.476"></a>
-<span class="sourceLineNo">477</span>   * some incompatible changes.<a name="line.477"></a>
-<span class="sourceLineNo">478</span>   */<a name="line.478"></a>
-<span class="sourceLineNo">479</span>  public void checkIfShouldMoveSystemRegionAsync() {<a name="line.479"></a>
-<span class="sourceLineNo">480</span>    new Thread(() -&gt; {<a name="line.480"></a>
-<span class="sourceLineNo">481</span>      try {<a name="line.481"></a>
-<span class="sourceLineNo">482</span>        synchronized (checkIfShouldMoveSystemRegionLock) {<a name="line.482"></a>
-<span class="sourceLineNo">483</span>          List&lt;RegionPlan&gt; plans = new ArrayList&lt;&gt;();<a name="line.483"></a>
-<span class="sourceLineNo">484</span>          for (ServerName server : getExcludedServersForSystemTable()) {<a name="line.484"></a>
-<span class="sourceLineNo">485</span>            if (master.getServerManager().isServerDead(server)) {<a name="line.485"></a>
-<span class="sourceLineNo">486</span>              // TODO: See HBASE-18494 and HBASE-18495. Though getExcludedServersForSystemTable()<a name="line.486"></a>
-<span class="sourceLineNo">487</span>              // considers only online servers, the server could be queued for dead server<a name="line.487"></a>
-<span class="sourceLineNo">488</span>              // processing. As region assignments for crashed server is handled by<a name="line.488"></a>
-<span class="sourceLineNo">489</span>              // ServerCrashProcedure, do NOT handle them here. The goal is to handle this through<a name="line.489"></a>
-<span class="sourceLineNo">490</span>              // regular flow of LoadBalancer as a favored node and not to have this special<a name="line.490"></a>
-<span class="sourceLineNo">491</span>              // handling.<a name="line.491"></a>
-<span class="sourceLineNo">492</span>              continue;<a name="line.492"></a>
-<span class="sourceLineNo">493</span>            }<a name="line.493"></a>
-<span class="sourceLineNo">494</span>            List&lt;RegionInfo&gt; regionsShouldMove = getCarryingSystemTables(server);<a name="line.494"></a>
-<span class="sourceLineNo">495</span>            if (!regionsShouldMove.isEmpty()) {<a name="line.495"></a>
-<span class="sourceLineNo">496</span>              for (RegionInfo regionInfo : regionsShouldMove) {<a name="line.496"></a>
-<span class="sourceLineNo">497</span>                // null value for dest forces destination server to be selected by balancer<a name="line.497"></a>
-<span class="sourceLineNo">498</span>                RegionPlan plan = new RegionPlan(regionInfo, server, null);<a name="line.498"></a>
-<span class="sourceLineNo">499</span>                if (regionInfo.isMetaRegion()) {<a name="line.499"></a>
-<span class="sourceLineNo">500</span>                  // Must move meta region first.<a name="line.500"></a>
-<span class="sourceLineNo">501</span>                  moveAsync(plan);<a name="line.501"></a>
-<span class="sourceLineNo">502</span>                } else {<a name="line.502"></a>
-<span class="sourceLineNo">503</span>                  plans.add(plan);<a name="line.503"></a>
-<span class="sourceLineNo">504</span>                }<a name="line.504"></a>
-<span class="sourceLineNo">505</span>              }<a name="line.505"></a>
-<span class="sourceLineNo">506</span>            }<a name="line.506"></a>
-<span class="sourceLineNo">507</span>            for (RegionPlan plan : plans) {<a name="line.507"></a>
-<span class="sourceLineNo">508</span>              moveAsync(plan);<a name="line.508"></a>
-<span class="sourceLineNo">509</span>            }<a name="line.509"></a>
-<span class="sourceLineNo">510</span>          }<a name="line.510"></a>
-<span class="sourceLineNo">511</span>        }<a name="line.511"></a>
-<span class="sourceLineNo">512</span>      } catch (Throwable t) {<a name="line.512"></a>
-<span class="sourceLineNo">513</span>        LOG.error(t.toString(), t);<a name="line.513"></a>
-<span class="sourceLineNo">514</span>      }<a name="line.514"></a>
-<span class="sourceLineNo">515</span>    }).start();<a name="line.515"></a>
+<span class="sourceLineNo">452</span>  /**<a name="line.452"></a>
+<span class="sourceLineNo">453</span>   * Start a new thread to check if there are region servers whose versions are higher than others.<a name="line.453"></a>
+<span class="sourceLineNo">454</span>   * If so, move all system table regions to RS with the highest version to keep compatibility.<a name="line.454"></a>
+<span class="sourceLineNo">455</span>   * The reason is, RS in new version may not be able to access RS in old version when there are<a name="line.455"></a>
+<span class="sourceLineNo">456</span>   * some incompatible changes.<a name="line.456"></a>
+<span class="sourceLineNo">457</span>   */<a name="line.457"></a>
+<span class="sourceLineNo">458</span>  public void checkIfShouldMoveSystemRegionAsync() {<a name="line.458"></a>
+<span class="sourceLineNo">459</span>    new Thread(() -&gt; {<a name="line.459"></a>
+<span class="sourceLineNo">460</span>      try {<a name="line.460"></a>
+<span class="sourceLineNo">461</span>        synchronized (checkIfShouldMoveSystemRegionLock) {<a name="line.461"></a>
+<span class="sourceLineNo">462</span>          List&lt;RegionPlan&gt; plans = new ArrayList&lt;&gt;();<a name="line.462"></a>
+<span class="sourceLineNo">463</span>          for (ServerName server : getExcludedServersForSystemTable()) {<a name="line.463"></a>
+<span class="sourceLineNo">464</span>            if (master.getServerManager().isServerDead(server)) {<a name="line.464"></a>
+<span class="sourceLineNo">465</span>              // TODO: See HBASE-18494 and HBASE-18495. Though getExcludedServersForSystemTable()<a name="line.465"></a>
+<span class="sourceLineNo">466</span>              // considers only online servers, the server could be queued for dead server<a name="line.466"></a>
+<span class="sourceLineNo">467</span>              // processing. As region assignments for crashed server is handled by<a name="line.467"></a>
+<span class="sourceLineNo">468</span>              // ServerCrashProcedure, do NOT handle them here. The goal is to handle this through<a name="line.468"></a>
+<span class="sourceLineNo">469</span>              // regular flow of LoadBalancer as a favored node and not to have this special<a name="line.469"></a>
+<span class="sourceLineNo">470</span>              // handling.<a name="line.470"></a>
+<span class="sourceLineNo">471</span>              continue;<a name="line.471"></a>
+<span class="sourceLineNo">472</span>            }<a name="line.472"></a>
+<span class="sourceLineNo">473</span>            List&lt;RegionInfo&gt; regionsShouldMove = getCarryingSystemTables(server);<a name="line.473"></a>
+<span class="sourceLineNo">474</span>            if (!regionsShouldMove.isEmpty()) {<a name="line.474"></a>
+<span class="sourceLineNo">475</span>              for (RegionInfo regionInfo : regionsShouldMove) {<a name="line.475"></a>
+<span class="sourceLineNo">476</span>                // null value for dest forces destination server to be selected by balancer<a name="line.476"></a>
+<span class="sourceLineNo">477</span>                RegionPlan plan = new RegionPlan(regionInfo, server, null);<a name="line.477"></a>
+<span class="sourceLineNo">478</span>                if (regionInfo.isMetaRegion()) {<a name="line.478"></a>
+<span class="sourceLineNo">479</span>                  // Must move meta region first.<a name="line.479"></a>
+<span class="sourceLineNo">480</span>                  moveAsync(plan);<a name="line.480"></a>
+<span class="sourceLineNo">481</span>                } else {<a name="line.481"></a>
+<span class="sourceLineNo">482</span>                  plans.add(plan);<a name="line.482"></a>
+<span class="sourceLineNo">483</span>                }<a name="line.483"></a>
+<span class="sourceLineNo">484</span>              }<a name="line.484"></a>
+<span class="sourceLineNo">485</span>            }<a name="line.485"></a>
+<span class="sourceLineNo">486</span>            for (RegionPlan plan : plans) {<a name="line.486"></a>
+<span class="sourceLineNo">487</span>              moveAsync(plan);<a name="line.487"></a>
+<span class="sourceLineNo">488</span>            }<a name="line.488"></a>
+<span class="sourceLineNo">489</span>          }<a name="line.489"></a>
+<span class="sourceLineNo">490</span>        }<a name="line.490"></a>
+<span class="sourceLineNo">491</span>      } catch (Throwable t) {<a name="line.491"></a>
+<span class="sourceLineNo">492</span>        LOG.error(t.toString(), t);<a name="line.492"></a>
+<span class="sourceLineNo">493</span>      }<a name="line.493"></a>
+<span class="sourceLineNo">494</span>    }).start();<a name="line.494"></a>
+<span class="sourceLineNo">495</span>  }<a name="line.495"></a>
+<span class="sourceLineNo">496</span><a name="line.496"></a>
+<span class="sourceLineNo">497</span>  private List&lt;RegionInfo&gt; getCarryingSystemTables(ServerName serverName) {<a name="line.497"></a>
+<span class="sourceLineNo">498</span>    Set&lt;RegionStateNode&gt; regions = this.getRegionStates().getServerNode(serverName).getRegions();<a name="line.498"></a>
+<span class="sourceLineNo">499</span>    if (regions == null) {<a name="line.499"></a>
+<span class="sourceLineNo">500</span>      return new ArrayList&lt;&gt;();<a name="line.500"></a>
+<span class="sourceLineNo">501</span>    }<a name="line.501"></a>
+<span class="sourceLineNo">502</span>    return regions.stream()<a name="line.502"></a>
+<span class="sourceLineNo">503</span>        .map(RegionStateNode::getRegionInfo)<a name="line.503"></a>
+<span class="sourceLineNo">504</span>        .filter(r -&gt; r.getTable().isSystemTable())<a name="line.504"></a>
+<span class="sourceLineNo">505</span>        .collect(Collectors.toList());<a name="line.505"></a>
+<span class="sourceLineNo">506</span>  }<a name="line.506"></a>
+<span class="sourceLineNo">507</span><a name="line.507"></a>
+<span class="sourceLineNo">508</span>  public void assign(final RegionInfo regionInfo, ServerName sn) throws IOException {<a name="line.508"></a>
+<span class="sourceLineNo">509</span>    AssignProcedure proc = createAssignProcedure(regionInfo, sn);<a name="line.509"></a>
+<span class="sourceLineNo">510</span>    ProcedureSyncWait.submitAndWaitProcedure(master.getMasterProcedureExecutor(), proc);<a name="line.510"></a>
+<span class="sourceLineNo">511</span>  }<a name="line.511"></a>
+<span class="sourceLineNo">512</span><a name="line.512"></a>
+<span class="sourceLineNo">513</span>  public void assign(final RegionInfo regionInfo) throws IOException {<a name="line.513"></a>
+<span class="sourceLineNo">514</span>    AssignProcedure proc = createAssignProcedure(regionInfo);<a name="line.514"></a>
+<span class="sourceLineNo">515</span>    ProcedureSyncWait.submitAndWaitProcedure(master.getMasterProcedureExecutor(), proc);<a name="line.515"></a>
 <span class="sourceLineNo">516</span>  }<a name="line.516"></a>
 <span class="sourceLineNo">517</span><a name="line.517"></a>
-<span class="sourceLineNo">518</span>  private List&lt;RegionInfo&gt; getCarryingSystemTables(ServerName serverName) {<a name="line.518"></a>
-<span class="sourceLineNo">519</span>    Set&lt;RegionStateNode&gt; regions = this.getRegionStates().getServerNode(serverName).getRegions();<a name="line.519"></a>
-<span class="sourceLineNo">520</span>    if (regions == null) {<a name="line.520"></a>
-<span class="sourceLineNo">521</span>      return new ArrayList&lt;&gt;();<a name="line.521"></a>
-<span class="sourceLineNo">522</span>    }<a name="line.522"></a>
-<span class="sourceLineNo">523</span>    return regions.stream()<a name="line.523"></a>
-<span class="sourceLineNo">524</span>        .map(RegionStateNode::getRegionInfo)<a name="line.524"></a>
-<span class="sourceLineNo">525</span>        .filter(r -&gt; r.getTable().isSystemTable())<a name="line.525"></a>
-<span class="sourceLineNo">526</span>        .collect(Collectors.toList());<a name="line.526"></a>
-<span class="sourceLineNo">527</span>  }<a name="line.527"></a>
-<span class="sourceLineNo">528</span><a name="line.528"></a>
-<span class="sourceLineNo">529</span>  public void assign(final RegionInfo regionInfo) throws IOException {<a name="line.529"></a>
-<span class="sourceLineNo">530</span>    AssignProcedure proc = createAssignProcedure(regionInfo);<a name="line.530"></a>
-<span class="sourceLineNo">531</span>    ProcedureSyncWait.submitAndWaitProcedure(master.getMasterProcedureExecutor(), proc);<a name="line.531"></a>
-<span class="sourceLineNo">532</span>  }<a name="line.532"></a>
-<span class="sourceLineNo">533</span><a name="line.533"></a>
-<span class="sourceLineNo">534</span>  public void unassign(final RegionInfo regionInfo) throws IOException {<a name="line.534"></a>
-<span class="sourceLineNo">535</span>    unassign(regionInfo, false);<a name="line.535"></a>
-<span class="sourceLineNo">536</span>  }<a name="line.536"></a>
-<span class="sourceLineNo">537</span><a name="line.537"></a>
-<span class="sourceLineNo">538</span>  public void unassign(final RegionInfo regionInfo, final boolean forceNewPlan)<a name="line.538"></a>
-<span class="sourceLineNo">539</span>  throws IOException {<a name="line.539"></a>
-<span class="sourceLineNo">540</span>    // TODO: rename this reassign<a name="line.540"></a>
-<span class="sourceLineNo">541</span>    RegionStateNode node = this.regionStates.getRegionStateNode(regionInfo);<a name="line.541"></a>
-<span class="sourceLineNo">542</span>    ServerName destinationServer = node.getRegionLocation();<a name="line.542"></a>
-<span class="sourceLineNo">543</span>    if (destinationServer == null) {<a name="line.543"></a>
-<span class="sourceLineNo">544</span>      throw new UnexpectedStateException("DestinationServer is null; Assigned? " + node.toString());<a name="line.544"></a>
-<span class="sourceLineNo">545</span>    }<a name="line.545"></a>
-<span class="sourceLineNo">546</span>    assert destinationServer != null; node.toString();<a name="line.546"></a>
-<span class="sourceLineNo">547</span>    UnassignProcedure proc = createUnassignProcedure(regionInfo, destinationServer, forceNewPlan);<a name="line.547"></a>
-<span class="sourceLineNo">548</span>    ProcedureSyncWait.submitAndWaitProcedure(master.getMasterProcedureExecutor(), proc);<a name="line.548"></a>
-<span class="sourceLineNo">549</span>  }<a name="line.549"></a>
-<span class="sourceLineNo">550</span><a name="line.550"></a>
-<span class="sourceLineNo">551</span>  public void move(final RegionInfo regionInfo) throws IOException {<a name="line.551"></a>
-<span class="sourceLineNo">552</span>    RegionStateNode node = this.regionStates.getRegionStateNode(regionInfo);<a name="line.552"></a>
-<span class="sourceLineNo">553</span>    ServerName sourceServer = node.getRegionLocation();<a name="line.553"></a>
-<span class="sourceLineNo">554</span>    RegionPlan plan = new RegionPlan(regionInfo, sourceServer, null);<a name="line.554"></a>
-<span class="sourceLineNo">555</span>    MoveRegionProcedure proc = createMoveRegionProcedure(plan);<a name="line.555"></a>
-<span class="sourceLineNo">556</span>    ProcedureSyncWait.submitAndWaitProcedure(master.getMasterProcedureExecutor(), proc);<a name="line.556"></a>
-<span class="sourceLineNo">557</span>  }<a name="line.557"></a>
-<span class="sourceLineNo">558</span><a name="line.558"></a>
-<span class="sourceLineNo">559</span>  public Future&lt;byte[]&gt; moveAsync(final RegionPlan regionPlan) {<a name="line.559"></a>
-<span class="sourceLineNo">560</span>    MoveRegionProcedure proc = createMoveRegionProcedure(regionPlan);<a name="line.560"></a>
-<span class="sourceLineNo">561</span>    return ProcedureSyncWait.submitProcedure(master.getMasterProcedureExecutor(), proc);<a name="line.561"></a>
-<span class="sourceLineNo">562</span>  }<a name="line.562"></a>
-<span class="sourceLineNo">563</span><a name="line.563"></a>
-<span class="sourceLineNo">564</span>  @VisibleForTesting<a name="line.564"></a>
-<span class="sourceLineNo">565</span>  public boolean waitForAssignment(final RegionInfo regionInfo) throws IOException {<a name="line.565"></a>
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-<span class="sourceLineNo">568</span><a name="line.568"></a>
-<span class="sourceLineNo">569</span>  @VisibleForTesting<a name="line.569"></a>
-<span class="sourceLineNo">570</span>  // TODO: Remove this?<a name="line.570"></a>
-<span class="sourceLineNo">571</span>  public boolean waitForAssignment(final RegionInfo regionInfo, final long timeout)<a name="line.571"></a>
-<span class="sourceLineNo">572</span>  throws IOException {<a name="line.572"></a>
-<span class="sourceLineNo">573</span>    RegionStateNode node = null;<a name="line.573"></a>
-<span class="sourceLineNo">574</span>    // This method can be called before the regionInfo has made it into the regionStateMap<a name="line.574"></a>
-<span class="sourceLineNo">575</span>    // so wait around here a while.<a name="line.575"></a>
-<span class="sourceLineNo">576</span>    long startTime = System.currentTimeMillis();<a name="line.576"></a>
-<span class="sourceLineNo">577</span>    // Something badly wrong if takes ten seconds to register a region.<a name="line.577"></a>
-<span class="sourceLineNo">578</span>    long endTime = startTime + 10000;<a name="line.578"></a>
-<span class="sourceLineNo">579</span>    while ((node = regionStates.getRegionStateNode(regionInfo)) == null &amp;&amp; isRunning() &amp;&amp;<a name="line.579"></a>
-<span class="sourceLineNo">580</span>        System.currentTimeMillis() &lt; endTime) {<a name="line.580"></a>
-<span class="sourceLineNo">581</span>      // Presume it not yet added but will be added soon. Let it spew a lot so we can tell if<a name="line.581"></a>
-<span class="sourceLineNo">582</span>      // we are waiting here alot.<a name="line.582"></a>
-<span class="sourceLineNo">583</span>      LOG.debug("Waiting on " + regionInfo + " to be added to regionStateMap");<a name="line.583"></a>
-<span class="sourceLineNo">584</span>      Threads.sleep(10);<a name="line.584"></a>
-<span class="sourceLineNo">585</span>    }<a name="line.585"></a>
-<span class="sourceLineNo">586</span>    if (node == null) {<a name="line.586"></a>
-<span class="sourceLineNo">587</span>      if (!isRunning()) return false;<a name="line.587"></a>
-<span class="sourceLineNo">588</span>      throw new RegionException(regionInfo.getRegionNameAsString() + " never registered with Assigment.");<a name="line.588"></a>
-<span class="sourceLineNo">589</span>    }<a name="line.589"></a>
-<span class="sourceLineNo">590</span><a name="line.590"></a>
-<span class="sourceLineNo">591</span>    RegionTransitionProcedure proc = node.getProcedure();<a name="line.591"></a>
-<span class="sourceLineNo">592</span>    if (proc == null) {<a name="line.592"></a>
-<span class="sourceLineNo">593</span>      throw new NoSuchProcedureException(node.toString());<a name="line.593"></a>
-<span class="sourceLineNo">594</span>    }<a name="line.594"></a>
-<span class="sourceLineNo">595</span><a name="line.595"></a>
-<span class="sourceLineNo">596</span>    ProcedureSyncWait.waitForProcedureToCompleteIOE(<a name="line.596"></a>
-<span class="sourceLineNo">597</span>      master.getMasterProcedureExecutor(), proc, timeout);<a name="line.597"></a>
-<span class="sourceLineNo">598</span>    return true;<a name="line.598"></a>
-<span class="sourceLineNo">599</span>  }<a name="line.599"></a>
-<span class="sourceLineNo">600</span><a name="line.600"></a>
-<span class="sourceLineNo">601</span>  // ============================================================================================<a name="line.601"></a>
-<span class="sourceLineNo">602</span>  //  RegionTransition procedures helpers<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>   * Create round-robin assigns. Use on table creation to distribute out regions across cluster.<a name="line.606"></a>
-<span class="sourceLineNo">607</span>   * @return AssignProcedures made out of the passed in &lt;code&gt;hris&lt;/code&gt; and a call<a name="line.607"></a>
-<span class="sourceLineNo">608</span>   * to the balancer to populate the assigns with targets chosen using round-robin (default<a name="line.608"></a>
-<span class="sourceLineNo">609</span>   * balancer scheme). If at assign-time, the target chosen is no longer up, thats fine,<a name="line.609"></a>
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+<span class="sourceLineNo">534</span><a name="line.534"></a>
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+<span class="sourceLineNo">542</span><a name="line.542"></a>
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+<span class="sourceLineNo">547</span><a name="line.547"></a>
+<span class="sourceLineNo">548</span>  @VisibleForTesting<a name="line.548"></a>
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+<span class="sourceLineNo">552</span><a name="line.552"></a>
+<span class="sourceLineNo">553</span>  @VisibleForTesting<a name="line.553"></a>
+<span class="sourceLineNo">554</span>  // TODO: Remove this?<a name="line.554"></a>
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+<span class="sourceLineNo">556</span>  throws IOException {<a name="line.556"></a>
+<span class="sourceLineNo">557</span>    RegionStateNode node = null;<a name="line.557"></a>
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+<span class="sourceLineNo">574</span><a name="line.574"></a>
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+<span class="sourceLineNo">577</span>      throw new NoSuchProcedureException(node.toString());<a name="line.577"></a>
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+<span class="sourceLineNo">585</span>  // ============================================================================================<a name="line.585"></a>
+<span class="sourceLineNo">586</span>  //  RegionTransition procedures helpers<a name="line.586"></a>
+<span class="sourceLineNo">587</span>  // ============================================================================================<a name="line.587"></a>
+<span class="sourceLineNo">588</span><a name="line.588"></a>
+<span class="sourceLineNo">589</span>  /**<a name="line.589"></a>
+<span class="sourceLineNo">590</span>   * Create round-robin assigns. Use on table creation to distribute out regions across cluster.<a name="line.590"></a>
+<span class="sourceLineNo">591</span>   * @return AssignProcedures made out of the passed in &lt;code&gt;hris&lt;/code&gt; and a call<a name="line.591"></a>
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+<span class="sourceLineNo">604</span>          this.master.getServerManager().createDestinationServersList(null));<a name="line.604"></a>
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+<span class="sourceLineNo">613</span><a name="line.613"></a>
+<span class="sourceLineNo">614</span>  /**<a name="line.614"></a>
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-<span class="sourceLineNo">783</span>  // ============================================================================================<a name="line.783"></a>
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-<span class="sourceLineNo">853</span>        serverName, regionNode, state));<a name="line.853"></a>
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+<span class="sourceLineNo">626</span>    int index = 0;<a name="line.626"></a>
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+<span class="sourceLineNo">628</span>    for (RegionInfo hri : hris) {<a name="line.628"></a>
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+<span class="sourceLineNo">638</span><a name="line.638"></a>
+<span class="sourceLineNo">639</span>  // Make this static for the method below where we use it typing the AssignProcedure array we<a name="line.639"></a>
+<span class="sourceLineNo">640</span>  // return as result.<a name="line.640"></a>
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+<span class="sourceLineNo">642</span><a name="line.642"></a>
+<span class="sourceLineNo">643</span>  /**<a name="line.643"></a>
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+<span class="sourceLineNo">645</span>   * @param size Count of assignments to make (the caller may know the total count)<a name="line.645"></a>
+<span class="sourceLineNo">646</span>   * @return Assignments made from the passed in &lt;code&gt;assignments&lt;/code&gt;<a name="line.646"></a>
+<span class="sourceLineNo">647</span>   */<a name="line.647"></a>
+<span class="sourceLineNo">648</span>  private AssignProcedure[] createAssignProcedures(Map&lt;ServerName, List&lt;RegionInfo&gt;&gt; assignments,<a name="line.648"></a>
+<span class="sourceLineNo">649</span>      int size) {<a name="line.649"></a>
+<span class="sourceLineNo">650</span>    List&lt;AssignProcedure&gt; procedures = new ArrayList&lt;&gt;(size &gt; 0? size: 8/*Arbitrary*/);<a name="line.650"></a>
+<span class="sourceLineNo">651</span>    for (Map.Entry&lt;ServerName, List&lt;RegionInfo&gt;&gt; e: assignments.entrySet()) {<a name="line.651"></a>
+<span class="sourceLineNo">652</span>      for (RegionInfo ri: e.getValue()) {<a name="line.652"></a>
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+<span class="sourceLineNo">655</span>        procedures.add(ap);<a name="line.655"></a>
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+<span class="sourceLineNo">657</span>    }<a name="line.657"></a>
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+<span class="sourceLineNo">661</span>    }<a name="line.661"></a>
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+<span class="sourceLineNo">664</span><a name="line.664"></a>
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+<span class="sourceLineNo">668</span><a name="line.668"></a>
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+<span class="sourceLineNo">672</span>    for (RegionStateNode node: nodes) {<a name="line.672"></a>
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+<span class="sourceLineNo">674</span>      // Look for regions that are offline/closed; i.e. already unassigned.<a name="line.674"></a>
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+<span class="sourceLineNo">676</span>      assert node.getRegionLocation() != null: node.toString();<a name="line.676"></a>
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+<span class="sourceLineNo">678</span>    }<a name="line.678"></a>
+<span class="sourceLineNo">679</span>    return procs.toArray(UNASSIGN_PROCEDURE_ARRAY_TYPE);<a name="line.679"></a>
+<span class="sourceLineNo">680</span>  }<a name="line.680"></a>
+<span class="sourceLineNo">681</span><a name="line.681"></a>
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+<span class="sourceLineNo">684</span>    int index = 0;<a name="line.684"></a>
+<span class="sourceLineNo">685</span>    for (RegionInfo hri: regionInfo) {<a name="line.685"></a>
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+<span class="sourceLineNo">692</span><a name="line.692"></a>
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+<span class="sourceLineNo">695</span>   * to unassign the regions of the table.<a name="line.695"></a>
+<span class="sourceLineNo">696</span>   */<a name="line.696"></a>
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+<span class="sourceLineNo">700</span><a name="line.700"></a>
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+<span class="sourceLineNo">706</span><a name="line.706"></a>
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+<span class="sourceLineNo">712</span>  }<a name="line.712"></a>
+<span class="sourceLineNo">713</span><a name="line.713"></a>
+<span class="sourceLineNo">714</span>  UnassignProcedure createUnassignProcedure(final RegionInfo regionInfo,<a name="line.714"></a>
+<span class="sourceLineNo">715</span>      final ServerName destinationServer, final boolean force) {<a name="line.715"></a>
+<span class="sourceLineNo">716</span>    // If destinationServer is null, figure it.<a name="line.716"></a>
+<span class="sourceLineNo">717</span>    ServerName sn = destinationServer != null? destinationServer:<a name="line.717"></a>
+<span class="sourceLineNo">718</span>      getRegionStates().getRegionState(regionInfo).getServerName();<a name="line.718"></a>
+<span class="sourceLineNo">719</span>    assert sn != null;<a name="line.719"></a>
+<span class="sourceLineNo">720</span>    UnassignProcedure proc = new UnassignProcedure(regionInfo, sn, force);<a name="line.720"></a>
+<span class="sourceLineNo">721</span>    proc.setOwner(getProcedureEnvironment().getRequestUser().getShortName());<a name="line.721"></a>
+<span class="sourceLineNo">722</span>    return proc;<a name="line.722"></a>
+<span class="sourceLineNo">723</span>  }<a name="line.723"></a>
+<span class="sourceLineNo">724</span><a name="line.724"></a>
+<span class="sourceLineNo">725</span>  public MoveRegionProcedure createMoveRegionProcedure(final RegionPlan plan) {<a name="line.725"></a>
+<span class="sourceLineNo">726</span>    if (plan.getRegionInfo().getTable().isSystemTable()) {<a name="line.726"></a>
+<span class="sourceLineNo">727</span>      List&lt;ServerName&gt; exclude = getExcludedServersForSystemTable();<a name="line.727"></a>
+<span class="sourceLineNo">728</span>      if (plan.getDestination() != null &amp;&amp; exclude.contains(plan.getDestination())) {<a name="line.728"></a>
+<span class="sourceLineNo">729</span>        try {<a name="line.729"></a>
+<span class="sourceLineNo">730</span>          LOG.info("Can not move " + plan.getRegionInfo() + " to " + plan.getDestination()<a name="line.730"></a>
+<span class="sourceLineNo">731</span>              + " because the server is not with highest version");<a name="line.731"></a>
+<span class="sourceLineNo">732</span>          plan.setDestination(getBalancer().randomAssignment(plan.getRegionInfo(),<a name="line.732"></a>
+<span class="sourceLineNo">733</span>              this.master.getServerManager().createDestinationServersList(exclude)));<a name="line.733"></a>
+<span class="sourceLineNo">734</span>        } catch (HBaseIOException e) {<a name="line.734"></a>
+<span class="sourceLineNo">735</span>          LOG.warn(e.toString(), e);<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>    }<a name="line.738"></a>
+<span class="sourceLineNo">739</span>    return new MoveRegionProcedure(getProcedureEnvironment(), plan);<a name="line.739"></a>
+<span class="sourceLineNo">740</span>  }<a name="line.740"></a>
+<span class="sourceLineNo">741</span><a name="line.741"></a>
+<span class="sourceLineNo">742</span><a name="line.742"></a>
+<span class="sourceLineNo">743</span>  public SplitTableRegionProcedure createSplitProcedure(final RegionInfo regionToSplit,<a name="line.743"></a>
+<span class="sourceLineNo">744</span>      final byte[] splitKey) throws IOException {<a name="line.744"></a>
+<span class="sourceLineNo">745</span>    return new SplitTableRegionProcedure(getProcedureEnvironment(), regionToSplit, splitKey);<a name="line.745"></a>
+<span class="sourceLineNo">746</span>  }<a name="line.746"></a>
+<span class="sourceLineNo">747</span><a name="line.747"></a>
+<span class="sourceLineNo">748</span>  public MergeTableRegionsProcedure createMergeProcedure(final RegionInfo regionToMergeA,<a name="line.748"></a>
+<span class="sourceLineNo">749</span>      final RegionInfo regionToMergeB) throws IOException {<a name="line.749"></a>
+<span class="sourceLineNo">750</span>    return new MergeTableRegionsProcedure(getProcedureEnvironment(), regionToMergeA,regionToMergeB);<a name="line.750"></a>
+<span class="sourceLineNo">751</span>  }<a name="line.751"></a>
+<span class="sourceLineNo">752</span><a name="line.752"></a>
+<span class="sourceLineNo">753</span>  /**<a name="line.753"></a>
+<span class="sourceLineNo">754</span>   * Delete the region states. This is called by "DeleteTable"<a name="line.754"></a>
+<span class="sourceLineNo">755</span>   */<a name="line.755"></a>
+<span class="sourceLineNo">756</span>  public void deleteTable(final TableName tableName) throws IOException {<a name="line.756"></a>
+<span class="sourceLineNo">757</span>    final ArrayList&lt;RegionInfo&gt; regions = regionStates.getTableRegionsInfo(tableName);<a name="line.757"></a>
+<span class="sourceLineNo">758</span>    regionStateStore.deleteRegions(regions);<a name="line.758"></a>
+<span class="sourceLineNo">759</span>    for (int i = 0; i &lt; regions.size(); ++i) {<a name="line.759"></a>
+<span class="sourceLineNo">760</span>      final RegionInfo regionInfo = regions.get(i);<a name="line.760"></a>
+<span class="sourceLineNo">761</span>      // we expect the region to be offline<a name="line.761"></a>
+<span class="sourceLineNo">762</span>      regionStates.removeFromOfflineRegions(regionInfo);<a name="line.762"></a>
+<span class="sourceLineNo">763</span>      regionStates.deleteRegion(regionInfo);<a name="line.763"></a>
+<span class="sourceLineNo">764</span>    }<a name="line.764"></a>
+<span class="sourceLineNo">765</span>  }<a name="line.765"></a>
+<span class="sourceLineNo">766</span><a name="line.766"></a>
+<span class="sourceLineNo">767</span>  // ============================================================================================<a name="line.767"></a>
+<span class="sourceLineNo">768</span>  //  RS Region Transition Report helpers<a name="line.768"></a>
+<span class="sourceLineNo">769</span>  // ============================================================================================<a name="line.769"></a>
+<span class="sourceLineNo">770</span>  // TODO: Move this code in MasterRpcServices and call on specific event?<a name="line.770"></a>
+<span class="sourceLineNo">771</span>  public ReportRegionStateTransitionResponse reportRegionStateTransition(<a name="line.771"></a>
+<span class="sourceLineNo">772</span>      final ReportRegionStateTransitionRequest req)<a name="line.772"></a>
+<span class="sourceLineNo">773</span>  throws PleaseHoldException {<a name="line.773"></a>
+<span class="sourceLineNo">774</span>    final ReportRegionStateTransitionResponse.Builder builder =<a name="line.774"></a>
+<span class="sourceLineNo">775</span>        ReportRegionStateTransitionResponse.newBuilder();<a name="line.775"></a>
+<span class="sourceLineNo">776</span>    final ServerName serverName = ProtobufUtil.toServerName(req.getServer());<a name="line.776"></a>
+<span class="sourceLineNo">777</span>    try {<a name="line.777"></a>
+<span class="sourceLineNo">778</span>      for (RegionStateTransition transition: req.getTransitionList()) {<a name="line.778"></a>
+<span class="sourceLineNo">779</span>        switch (transition.getTransitionCode()) {<a name="line.779"></a>
+<span class="sourceLineNo">780</span>          case OPENED:<a name="line.780"></a>
+<span class="sourceLineNo">781</span>          case FAILED_OPEN:<a name="line.781"></a>
+<span class="sourceLineNo">782</span>          case CLOSED:<a name="line.782"></a>
+<span class="sourceLineNo">783</span>            assert transition.getRegionInfoCount() == 1 : transition;<a name="line.783"></a>
+<span class="sourceLineNo">784</span>            final RegionInfo hri = ProtobufUtil.toRegionInfo(transition.getRegionInfo(0));<a name="line.784"></a>
+<span class="sourceLineNo">785</span>            updateRegionTransition(serverName, transition.getTransitionCode(), hri,<a name="line.785"></a>
+<span class="sourceLineNo">786</span>                transition.hasOpenSeqNum() ? transition.getOpenSeqNum() : HConstants.NO_SEQNUM);<a name="line.786"></a>
+<span class="sourceLineNo">787</span>            break;<a name="line.787"></a>
+<span class="sourceLineNo">788</span>          case READY_TO_SPLIT:<a name="line.788"></a>
+<span class="sourceLineNo">789</span>          case SPLIT:<a name="line.789"></a>
+<span class="sourceLineNo">790</span>          case SPLIT_REVERTED:<a name="line.790"></a>
+<span class="sourceLineNo">791</span>            assert transition.getRegionInfoCount() == 3 : transition;<a name="line.791"></a>
+<span class="sourceLineNo">792</span>            final RegionInfo parent = ProtobufUtil.toRegionInfo(transition.getRegionInfo(0));<a name="line.792"></a>
+<span class="sourceLineNo">793</span>            final RegionInfo splitA = ProtobufUtil.toRegionInfo(transition.getRegionInfo(1));<a name="line.793"></a>
+<span class="sourceLineNo">794</span>            final RegionInfo splitB = ProtobufUtil.toRegionInfo(transition.getRegionInfo(2));<a name="line.794"></a>
+<span class="sourceLineNo">795</span>            updateRegionSplitTransition(serverName, transition.getTransitionCode(),<a name="line.795"></a>
+<span class="sourceLineNo">796</span>              parent, splitA, splitB);<a name="line.796"></a>
+<span class="sourceLineNo">797</span>            break;<a name="line.797"></a>
+<span class="sourceLineNo">798</span>          case READY_TO_MERGE:<a name="line.798"></a>
+<span class="sourceLineNo">799</span>          case MERGED:<a name="line.799"></a>
+<span class="sourceLineNo">800</span>          case MERGE_REVERTED:<a name="line.800"></a>
+<span class="sourceLineNo">801</span>            assert transition.getRegionInfoCount() == 3 : transition;<a name="line.801"></a>
+<span class="sourceLineNo">802</span>            final RegionInfo merged = ProtobufUtil.toRegionInfo(transition.getRegionInfo(0));<a name="line.802"></a>
+<span class="sourceLineNo">803</span>            final RegionInfo mergeA = ProtobufUtil.toRegionInfo(transition.getRegionInfo(1));<a name="line.803"></a>
+<span class="sourceLineNo">804</span>            final RegionInfo mergeB = ProtobufUtil.toRegionInfo(transition.getRegionInfo(2));<a name="line.804"></a>
+<span class="sourceLineNo">805</span>            updateRegionMergeTransition(serverName, transition.getTransitionCode(),<a name="line.805"></a>
+<span class="sourceLineNo">806</span>              merged, mergeA, mergeB);<a name="line.806"></a>
+<span class="sourceLineNo">807</span>            break;<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>    } catch (PleaseHoldException e) {<a name="line.810"></a>
+<span class="sourceLineNo">811</span>      if (LOG.isTraceEnabled()) LOG.trace("Failed transition " + e.getMessage());<a name="line.811"></a>
+<span class="sourceLineNo">812</span>      throw e;<a name="line.812"></a>
+<span class="sourceLineNo">813</span>    } catch (UnsupportedOperationException|IOException e) {<a name="line.813"></a>
+<span class="sourceLineNo">814</span>      // TODO: at the moment we have a single error message and the RS will abort<a name="line.814"></a>
+<span class="sourceLineNo">815</span>      // if the master says that one of the region transitions failed.<a name="line.815"></a>
+<span class="sourceLineNo">816</span>      LOG.warn("Failed transition", e);<a name="line.816"></a>
+<span class="sourceLineNo">817</span>      builder.setErrorMessage("Failed transition " + e.getMessage());<a name="line.817"></a>
+<span class="sourceLineNo">818</span>    }<a name="line.818"></a>
+<span class="sourceLineNo">819</span>    return builder.build();<a name="line.819"></a>
+<span class="sourceLineNo">820</span>  }<a name="line.820"></a>
+<span class="sourceLineNo">821</span><a name="line.821"></a>
+<span class="sourceLineNo">822</span>  private void updateRegionTransition(final ServerName serverName, final TransitionCode state,<a name="line.822"></a>
+<span class="sourceLineNo">823</span>      final RegionInfo regionInfo, final long seqId)<a name="line.823"></a>
+<span class="sourceLineNo">824</span>      throws PleaseHoldException, UnexpectedStateException {<a name="line.824"></a>
+<span class="sourceLineNo">825</span>    checkFailoverCleanupCompleted(regionInfo);<a name="line.825"></a>
+<span class="sourceLineNo">826</span><a name="line.826"></a>
+<span class="sourceLineNo">827</span>    final RegionStateNode regionNode = regionStates.getRegionStateNode(regionInfo);<a name="line.827"></a>
+<span class="sourceLineNo">828</span>    if (regionNode == null) {<a name="line.828"></a>
+<span class="sourceLineNo">829</span>      // the table/region is gone. maybe a delete, split, merge<a name="line.829"></a>
+<span class="sourceLineNo">830</span>      throw new UnexpectedStateException(String.format(<a name="line.830"></a>
+<span class="sourceLineNo">831</span>        "Server %s was trying to transition region %s to %s. but the region was removed.",<a name="line.831"></a>
+<span class="sourceLineNo">832</span>        serverName, regionInfo, state));<a name="line.832"></a>
+<span class="sourceLineNo">833</span>    }<a name="line.833"></a>
+<span class="sourceLineNo">834</span><a name="line.834"></a>
+<span class="sourceLineNo">835</span>    if (LOG.isTraceEnabled()) {<a name="line.835"></a>
+<span class="sourceLineNo">836</span>      LOG.trace(String.format("Update region transition serverName=%s region=%s regionState=%s",<a name="line.836"></a>
+<span class="sourceLineNo">837</span>        serverName, regionNode, state));<a name="line.837"></a>
+<span class="sourceLineNo">838</span>    }<a name="line.838"></a>
+<span class="sourceLineNo">839</span><a name="line.839"></a>
+<span class="sourceLineNo">840</span>    final ServerStateNode serverNode = regionStates.getOrCreateServer(serverName);<a name="line.840"></a>
+<span class="sourceLineNo">841</span>    if (!reportTransition(regionNode, serverNode, state, seqId)) {<a name="line.841"></a>
+<span class="sourceLineNo">842</span>      LOG.warn(String.format(<a name="line.842"></a>
+<span class="sourceLineNo">843</span>        "No procedure for %s. server=%s to transition to %s", regionNode, serverName, state));<a name="line.843"></a>
+<span class="sourceLineNo">844</span>    }<a name="line.844"></a>
+<span class="sourceLineNo">845</span>  }<a name="line.845"></a>
+<span class="sourceLineNo">846</span><a name="line.846"></a>
+<span class="sourceLineNo">847</span>  // FYI: regionNode is sometimes synchronized by the caller but not always.<a name="line.847"></a>
+<span class="sourceLineNo">848</span>  private boolean reportTransition(final RegionStateNode regionNode,<a name="line.848"></a>
+<span class="sourceLineNo">849</span>      final ServerStateNode serverNode, final TransitionCode state, final long seqId)<a name="line.849"></a>
+<span class="sourceLineNo">850</span>      throws UnexpectedStateException {<a name="line.850"></a>
+<span class="sourceLineNo">851</span>    final ServerName serverName = serverNode.getServerName();<a name="line.851"></a>
+<span class="sourceLineNo">852</span>    synchronized (regionNode) {<a name="line.852"></a>
+<span class="sourceLineNo">853</span>      final RegionTransitionProcedure proc = regionNode.getProcedure();<a name="line.853"></a>
+<span class="sourceLineNo">854</span>      if (proc == null) return false;<a name="line.854"></a>
 <span class="sourceLineNo">855</span><a name="line.855"></a>
-<span class="sourceLineNo">856</span>    final ServerStateNode serverNode = regionStates.getOrCreateServer(serverName);<a name="line.856"></a>
-<span class="sourceLineNo">857</span>    if (!reportTransition(regionNode, serverNode, state, seqId)) {<a name="line.857"></a>
-<span class="sourceLineNo">858</span>      LOG.warn(String.format(<a name="line.858"></a>
-<span class="sourceLineNo">859</span>        "No procedure for %s. server=%s to transition to %s", regionNode, serverName, state));<a name="line.859"></a>
-<span class="sourceLineNo">860</span>    }<a name="line.860"></a>
+<span class="sourceLineNo">856</span>      // serverNode.getReportEvent().removeProcedure(proc);<a name="line.856"></a>
+<span class="sourceLineNo">857</span>      proc.reportTransition(master.getMasterProcedureExecutor().getEnvironment(),<a name="line.857"></a>
+<span class="sourceLineNo">858</span>        serverName, state, seqId);<a name="line.858"></a>
+<span class="sourceLineNo">859</span>    }<a name="line.859"></a>
+<span class="sourceLineNo">860</span>    return true;<a name="line.860"></a>
 <span class="sourceLineNo">861</span>  }<a name="line.861"></a>
 <span class="sourceLineNo">862</span><a name="line.862"></a>
-<span class="sourceLineNo">863</span>  // FYI: regionNode is sometimes synchronized by the caller but not always.<a name="line.863"></a>
-<span class="sourceLineNo">864</span>  private boolean reportTransition(final RegionStateNode regionNode,<a name="line.864"></a>
-<span class="sourceLineNo">865</span>      final ServerStateNode serverNode, final TransitionCode state, final long seqId)<a name="line.865"></a>
-<span class="sourceLineNo">866</span>      throws UnexpectedStateException {<a name="line.866"></a>
-<span class="sourceLineNo">867</span>    final ServerName serverName = serverNode.ge

<TRUNCATED>

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