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From git-site-r...@apache.org
Subject [22/51] [partial] hbase-site git commit: Published site at .
Date Tue, 28 Nov 2017 15:18:06 GMT
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/b9722a17/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 40cd159..2da0903 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
@@ -260,7 +260,7 @@
 <span class="sourceLineNo">252</span><a name="line.252"></a>
 <span class="sourceLineNo">253</span>    // Update meta events (for testing)<a name="line.253"></a>
 <span class="sourceLineNo">254</span>    if (hasProcExecutor) {<a name="line.254"></a>
-<span class="sourceLineNo">255</span>      getProcedureScheduler().suspendEvent(metaLoadEvent);<a name="line.255"></a>
+<span class="sourceLineNo">255</span>      metaLoadEvent.suspend();<a name="line.255"></a>
 <span class="sourceLineNo">256</span>      setFailoverCleanupDone(false);<a name="line.256"></a>
 <span class="sourceLineNo">257</span>      for (RegionInfo hri: getMetaRegionSet()) {<a name="line.257"></a>
 <span class="sourceLineNo">258</span>        setMetaInitialized(hri, false);<a name="line.258"></a>
@@ -421,1455 +421,1454 @@
 <span class="sourceLineNo">413</span>  }<a name="line.413"></a>
 <span class="sourceLineNo">414</span><a name="line.414"></a>
 <span class="sourceLineNo">415</span>  public boolean waitMetaInitialized(final Procedure proc, final RegionInfo regionInfo) {<a name="line.415"></a>
-<span class="sourceLineNo">416</span>    return getProcedureScheduler().waitEvent(<a name="line.416"></a>
-<span class="sourceLineNo">417</span>      getMetaInitializedEvent(getMetaForRegion(regionInfo)), proc);<a name="line.417"></a>
-<span class="sourceLineNo">418</span>  }<a name="line.418"></a>
-<span class="sourceLineNo">419</span><a name="line.419"></a>
-<span class="sourceLineNo">420</span>  private void setMetaInitialized(final RegionInfo metaRegionInfo, final boolean isInitialized) {<a name="line.420"></a>
-<span class="sourceLineNo">421</span>    assert isMetaRegion(metaRegionInfo) : "unexpected non-meta region " + metaRegionInfo;<a name="line.421"></a>
-<span class="sourceLineNo">422</span>    final ProcedureEvent metaInitEvent = getMetaInitializedEvent(metaRegionInfo);<a name="line.422"></a>
-<span class="sourceLineNo">423</span>    if (isInitialized) {<a name="line.423"></a>
-<span class="sourceLineNo">424</span>      getProcedureScheduler().wakeEvent(metaInitEvent);<a name="line.424"></a>
-<span class="sourceLineNo">425</span>    } else {<a name="line.425"></a>
-<span class="sourceLineNo">426</span>      getProcedureScheduler().suspendEvent(metaInitEvent);<a name="line.426"></a>
-<span class="sourceLineNo">427</span>    }<a name="line.427"></a>
-<span class="sourceLineNo">428</span>  }<a name="line.428"></a>
-<span class="sourceLineNo">429</span><a name="line.429"></a>
-<span class="sourceLineNo">430</span>  private ProcedureEvent getMetaInitializedEvent(final RegionInfo metaRegionInfo) {<a name="line.430"></a>
-<span class="sourceLineNo">431</span>    assert isMetaRegion(metaRegionInfo) : "unexpected non-meta region " + metaRegionInfo;<a name="line.431"></a>
-<span class="sourceLineNo">432</span>    // TODO: handle multiple meta.<a name="line.432"></a>
-<span class="sourceLineNo">433</span>    return metaInitializedEvent;<a name="line.433"></a>
-<span class="sourceLineNo">434</span>  }<a name="line.434"></a>
-<span class="sourceLineNo">435</span><a name="line.435"></a>
-<span class="sourceLineNo">436</span>  public boolean waitMetaLoaded(final Procedure proc) {<a name="line.436"></a>
-<span class="sourceLineNo">437</span>    return getProcedureScheduler().waitEvent(metaLoadEvent, proc);<a name="line.437"></a>
-<span class="sourceLineNo">438</span>  }<a name="line.438"></a>
-<span class="sourceLineNo">439</span><a name="line.439"></a>
-<span class="sourceLineNo">440</span>  protected void wakeMetaLoadedEvent() {<a name="line.440"></a>
-<span class="sourceLineNo">441</span>    getProcedureScheduler().wakeEvent(metaLoadEvent);<a name="line.441"></a>
-<span class="sourceLineNo">442</span>    assert isMetaLoaded() : "expected meta to be loaded";<a name="line.442"></a>
-<span class="sourceLineNo">443</span>  }<a name="line.443"></a>
-<span class="sourceLineNo">444</span><a name="line.444"></a>
-<span class="sourceLineNo">445</span>  public boolean isMetaLoaded() {<a name="line.445"></a>
-<span class="sourceLineNo">446</span>    return metaLoadEvent.isReady();<a name="line.446"></a>
-<span class="sourceLineNo">447</span>  }<a name="line.447"></a>
-<span class="sourceLineNo">448</span><a name="line.448"></a>
-<span class="sourceLineNo">449</span>  // ============================================================================================<a name="line.449"></a>
-<span class="sourceLineNo">450</span>  //  TODO: Sync helpers<a name="line.450"></a>
-<span class="sourceLineNo">451</span>  // ============================================================================================<a name="line.451"></a>
-<span class="sourceLineNo">452</span>  public void assignMeta(final RegionInfo metaRegionInfo) throws IOException {<a name="line.452"></a>
-<span class="sourceLineNo">453</span>    assignMeta(metaRegionInfo, null);<a name="line.453"></a>
-<span class="sourceLineNo">454</span>  }<a name="line.454"></a>
-<span class="sourceLineNo">455</span><a name="line.455"></a>
-<span class="sourceLineNo">456</span>  public void assignMeta(final RegionInfo metaRegionInfo, final ServerName serverName)<a name="line.456"></a>
-<span class="sourceLineNo">457</span>      throws IOException {<a name="line.457"></a>
-<span class="sourceLineNo">458</span>    assert isMetaRegion(metaRegionInfo) : "unexpected non-meta region " + metaRegionInfo;<a name="line.458"></a>
-<span class="sourceLineNo">459</span>    AssignProcedure proc;<a name="line.459"></a>
-<span class="sourceLineNo">460</span>    if (serverName != null) {<a name="line.460"></a>
-<span class="sourceLineNo">461</span>      LOG.debug("Try assigning Meta " + metaRegionInfo + " to " + serverName);<a name="line.461"></a>
-<span class="sourceLineNo">462</span>      proc = createAssignProcedure(metaRegionInfo, serverName);<a name="line.462"></a>
-<span class="sourceLineNo">463</span>    } else {<a name="line.463"></a>
-<span class="sourceLineNo">464</span>      LOG.debug("Assigning " + metaRegionInfo.getRegionNameAsString());<a name="line.464"></a>
-<span class="sourceLineNo">465</span>      proc = createAssignProcedure(metaRegionInfo, false);<a name="line.465"></a>
-<span class="sourceLineNo">466</span>    }<a name="line.466"></a>
-<span class="sourceLineNo">467</span>    ProcedureSyncWait.submitAndWaitProcedure(master.getMasterProcedureExecutor(), proc);<a name="line.467"></a>
-<span class="sourceLineNo">468</span>  }<a name="line.468"></a>
-<span class="sourceLineNo">469</span><a name="line.469"></a>
-<span class="sourceLineNo">470</span>  /**<a name="line.470"></a>
-<span class="sourceLineNo">471</span>   * Start a new thread to check if there are region servers whose versions are higher than others.<a name="line.471"></a>
-<span class="sourceLineNo">472</span>   * If so, move all system table regions to RS with the highest version to keep compatibility.<a name="line.472"></a>
-<span class="sourceLineNo">473</span>   * The reason is, RS in new version may not be able to access RS in old version when there are<a name="line.473"></a>
-<span class="sourceLineNo">474</span>   * some incompatible changes.<a name="line.474"></a>
-<span class="sourceLineNo">475</span>   */<a name="line.475"></a>
-<span class="sourceLineNo">476</span>  public void checkIfShouldMoveSystemRegionAsync() {<a name="line.476"></a>
-<span class="sourceLineNo">477</span>    new Thread(() -&gt; {<a name="line.477"></a>
-<span class="sourceLineNo">478</span>      try {<a name="line.478"></a>
-<span class="sourceLineNo">479</span>        synchronized (checkIfShouldMoveSystemRegionLock) {<a name="line.479"></a>
-<span class="sourceLineNo">480</span>          List&lt;RegionPlan&gt; plans = new ArrayList&lt;&gt;();<a name="line.480"></a>
-<span class="sourceLineNo">481</span>          for (ServerName server : getExcludedServersForSystemTable()) {<a name="line.481"></a>
-<span class="sourceLineNo">482</span>            if (master.getServerManager().isServerDead(server)) {<a name="line.482"></a>
-<span class="sourceLineNo">483</span>              // TODO: See HBASE-18494 and HBASE-18495. Though getExcludedServersForSystemTable()<a name="line.483"></a>
-<span class="sourceLineNo">484</span>              // considers only online servers, the server could be queued for dead server<a name="line.484"></a>
-<span class="sourceLineNo">485</span>              // processing. As region assignments for crashed server is handled by<a name="line.485"></a>
-<span class="sourceLineNo">486</span>              // ServerCrashProcedure, do NOT handle them here. The goal is to handle this through<a name="line.486"></a>
-<span class="sourceLineNo">487</span>              // regular flow of LoadBalancer as a favored node and not to have this special<a name="line.487"></a>
-<span class="sourceLineNo">488</span>              // handling.<a name="line.488"></a>
-<span class="sourceLineNo">489</span>              continue;<a name="line.489"></a>
-<span class="sourceLineNo">490</span>            }<a name="line.490"></a>
-<span class="sourceLineNo">491</span>            List&lt;RegionInfo&gt; regionsShouldMove = getCarryingSystemTables(server);<a name="line.491"></a>
-<span class="sourceLineNo">492</span>            if (!regionsShouldMove.isEmpty()) {<a name="line.492"></a>
-<span class="sourceLineNo">493</span>              for (RegionInfo regionInfo : regionsShouldMove) {<a name="line.493"></a>
-<span class="sourceLineNo">494</span>                // null value for dest forces destination server to be selected by balancer<a name="line.494"></a>
-<span class="sourceLineNo">495</span>                RegionPlan plan = new RegionPlan(regionInfo, server, null);<a name="line.495"></a>
-<span class="sourceLineNo">496</span>                if (regionInfo.isMetaRegion()) {<a name="line.496"></a>
-<span class="sourceLineNo">497</span>                  // Must move meta region first.<a name="line.497"></a>
-<span class="sourceLineNo">498</span>                  moveAsync(plan);<a name="line.498"></a>
-<span class="sourceLineNo">499</span>                } else {<a name="line.499"></a>
-<span class="sourceLineNo">500</span>                  plans.add(plan);<a name="line.500"></a>
-<span class="sourceLineNo">501</span>                }<a name="line.501"></a>
-<span class="sourceLineNo">502</span>              }<a name="line.502"></a>
-<span class="sourceLineNo">503</span>            }<a name="line.503"></a>
-<span class="sourceLineNo">504</span>            for (RegionPlan plan : plans) {<a name="line.504"></a>
-<span class="sourceLineNo">505</span>              moveAsync(plan);<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>        }<a name="line.508"></a>
-<span class="sourceLineNo">509</span>      } catch (Throwable t) {<a name="line.509"></a>
-<span class="sourceLineNo">510</span>        LOG.error(t);<a name="line.510"></a>
-<span class="sourceLineNo">511</span>      }<a name="line.511"></a>
-<span class="sourceLineNo">512</span>    }).start();<a name="line.512"></a>
-<span class="sourceLineNo">513</span>  }<a name="line.513"></a>
-<span class="sourceLineNo">514</span><a name="line.514"></a>
-<span class="sourceLineNo">515</span>  private List&lt;RegionInfo&gt; getCarryingSystemTables(ServerName serverName) {<a name="line.515"></a>
-<span class="sourceLineNo">516</span>    Set&lt;RegionStateNode&gt; regions = this.getRegionStates().getServerNode(serverName).getRegions();<a name="line.516"></a>
-<span class="sourceLineNo">517</span>    if (regions == null) {<a name="line.517"></a>
-<span class="sourceLineNo">518</span>      return new ArrayList&lt;&gt;();<a name="line.518"></a>
-<span class="sourceLineNo">519</span>    }<a name="line.519"></a>
-<span class="sourceLineNo">520</span>    return regions.stream()<a name="line.520"></a>
-<span class="sourceLineNo">521</span>        .map(RegionStateNode::getRegionInfo)<a name="line.521"></a>
-<span class="sourceLineNo">522</span>        .filter(r -&gt; r.getTable().isSystemTable())<a name="line.522"></a>
-<span class="sourceLineNo">523</span>        .collect(Collectors.toList());<a name="line.523"></a>
-<span class="sourceLineNo">524</span>  }<a name="line.524"></a>
-<span class="sourceLineNo">525</span><a name="line.525"></a>
-<span class="sourceLineNo">526</span>  public void assign(final RegionInfo regionInfo) throws IOException {<a name="line.526"></a>
-<span class="sourceLineNo">527</span>    assign(regionInfo, true);<a name="line.527"></a>
-<span class="sourceLineNo">528</span>  }<a name="line.528"></a>
-<span class="sourceLineNo">529</span><a name="line.529"></a>
-<span class="sourceLineNo">530</span>  public void assign(final RegionInfo regionInfo, final boolean forceNewPlan) throws IOException {<a name="line.530"></a>
-<span class="sourceLineNo">531</span>    AssignProcedure proc = createAssignProcedure(regionInfo, forceNewPlan);<a name="line.531"></a>
-<span class="sourceLineNo">532</span>    ProcedureSyncWait.submitAndWaitProcedure(master.getMasterProcedureExecutor(), proc);<a name="line.532"></a>
-<span class="sourceLineNo">533</span>  }<a name="line.533"></a>
-<span class="sourceLineNo">534</span><a name="line.534"></a>
-<span class="sourceLineNo">535</span>  public void unassign(final RegionInfo regionInfo) throws IOException {<a name="line.535"></a>
-<span class="sourceLineNo">536</span>    unassign(regionInfo, false);<a name="line.536"></a>
-<span class="sourceLineNo">537</span>  }<a name="line.537"></a>
-<span class="sourceLineNo">538</span><a name="line.538"></a>
-<span class="sourceLineNo">539</span>  public void unassign(final RegionInfo regionInfo, final boolean forceNewPlan)<a name="line.539"></a>
-<span class="sourceLineNo">540</span>  throws IOException {<a name="line.540"></a>
-<span class="sourceLineNo">541</span>    // TODO: rename this reassign<a name="line.541"></a>
-<span class="sourceLineNo">542</span>    RegionStateNode node = this.regionStates.getRegionNode(regionInfo);<a name="line.542"></a>
-<span class="sourceLineNo">543</span>    ServerName destinationServer = node.getRegionLocation();<a name="line.543"></a>
-<span class="sourceLineNo">544</span>    if (destinationServer == null) {<a name="line.544"></a>
-<span class="sourceLineNo">545</span>      throw new UnexpectedStateException("DestinationServer is null; Assigned? " + node.toString());<a name="line.545"></a>
-<span class="sourceLineNo">546</span>    }<a name="line.546"></a>
-<span class="sourceLineNo">547</span>    assert destinationServer != null; node.toString();<a name="line.547"></a>
-<span class="sourceLineNo">548</span>    UnassignProcedure proc = createUnassignProcedure(regionInfo, destinationServer, forceNewPlan);<a name="line.548"></a>
-<span class="sourceLineNo">549</span>    ProcedureSyncWait.submitAndWaitProcedure(master.getMasterProcedureExecutor(), proc);<a name="line.549"></a>
-<span class="sourceLineNo">550</span>  }<a name="line.550"></a>
-<span class="sourceLineNo">551</span><a name="line.551"></a>
-<span class="sourceLineNo">552</span>  public void move(final RegionInfo regionInfo) throws IOException {<a name="line.552"></a>
-<span class="sourceLineNo">553</span>    RegionStateNode node = this.regionStates.getRegionNode(regionInfo);<a name="line.553"></a>
-<span class="sourceLineNo">554</span>    ServerName sourceServer = node.getRegionLocation();<a name="line.554"></a>
-<span class="sourceLineNo">555</span>    RegionPlan plan = new RegionPlan(regionInfo, sourceServer, null);<a name="line.555"></a>
-<span class="sourceLineNo">556</span>    MoveRegionProcedure proc = createMoveRegionProcedure(plan);<a name="line.556"></a>
-<span class="sourceLineNo">557</span>    ProcedureSyncWait.submitAndWaitProcedure(master.getMasterProcedureExecutor(), proc);<a name="line.557"></a>
-<span class="sourceLineNo">558</span>  }<a name="line.558"></a>
-<span class="sourceLineNo">559</span><a name="line.559"></a>
-<span class="sourceLineNo">560</span>  public Future&lt;byte[]&gt; moveAsync(final RegionPlan regionPlan) {<a name="line.560"></a>
-<span class="sourceLineNo">561</span>    MoveRegionProcedure proc = createMoveRegionProcedure(regionPlan);<a name="line.561"></a>
-<span class="sourceLineNo">562</span>    return ProcedureSyncWait.submitProcedure(master.getMasterProcedureExecutor(), proc);<a name="line.562"></a>
-<span class="sourceLineNo">563</span>  }<a name="line.563"></a>
-<span class="sourceLineNo">564</span><a name="line.564"></a>
-<span class="sourceLineNo">565</span>  @VisibleForTesting<a name="line.565"></a>
-<span class="sourceLineNo">566</span>  public boolean waitForAssignment(final RegionInfo regionInfo) throws IOException {<a name="line.566"></a>
-<span class="sourceLineNo">567</span>    return waitForAssignment(regionInfo, Long.MAX_VALUE);<a name="line.567"></a>
-<span class="sourceLineNo">568</span>  }<a name="line.568"></a>
-<span class="sourceLineNo">569</span><a name="line.569"></a>
-<span class="sourceLineNo">570</span>  @VisibleForTesting<a name="line.570"></a>
-<span class="sourceLineNo">571</span>  // TODO: Remove this?<a name="line.571"></a>
-<span class="sourceLineNo">572</span>  public boolean waitForAssignment(final RegionInfo regionInfo, final long timeout)<a name="line.572"></a>
-<span class="sourceLineNo">573</span>  throws IOException {<a name="line.573"></a>
-<span class="sourceLineNo">574</span>    RegionStateNode node = null;<a name="line.574"></a>
-<span class="sourceLineNo">575</span>    // This method can be called before the regionInfo has made it into the regionStateMap<a name="line.575"></a>
-<span class="sourceLineNo">576</span>    // so wait around here a while.<a name="line.576"></a>
-<span class="sourceLineNo">577</span>    long startTime = System.currentTimeMillis();<a name="line.577"></a>
-<span class="sourceLineNo">578</span>    // Something badly wrong if takes ten seconds to register a region.<a name="line.578"></a>
-<span class="sourceLineNo">579</span>    long endTime = startTime + 10000;<a name="line.579"></a>
-<span class="sourceLineNo">580</span>    while ((node = regionStates.getRegionNode(regionInfo)) == null &amp;&amp; isRunning() &amp;&amp;<a name="line.580"></a>
-<span class="sourceLineNo">581</span>        System.currentTimeMillis() &lt; endTime) {<a name="line.581"></a>
-<span class="sourceLineNo">582</span>      // Presume it not yet added but will be added soon. Let it spew a lot so we can tell if<a name="line.582"></a>
-<span class="sourceLineNo">583</span>      // we are waiting here alot.<a name="line.583"></a>
-<span class="sourceLineNo">584</span>      LOG.debug("Waiting on " + regionInfo + " to be added to regionStateMap");<a name="line.584"></a>
-<span class="sourceLineNo">585</span>      Threads.sleep(10);<a name="line.585"></a>
-<span class="sourceLineNo">586</span>    }<a name="line.586"></a>
-<span class="sourceLineNo">587</span>    if (node == null) {<a name="line.587"></a>
-<span class="sourceLineNo">588</span>      if (!isRunning()) return false;<a name="line.588"></a>
-<span class="sourceLineNo">589</span>      throw new RegionException(regionInfo.getRegionNameAsString() + " never registered with Assigment.");<a name="line.589"></a>
-<span class="sourceLineNo">590</span>    }<a name="line.590"></a>
-<span class="sourceLineNo">591</span><a name="line.591"></a>
-<span class="sourceLineNo">592</span>    RegionTransitionProcedure proc = node.getProcedure();<a name="line.592"></a>
-<span class="sourceLineNo">593</span>    if (proc == null) {<a name="line.593"></a>
-<span class="sourceLineNo">594</span>      throw new NoSuchProcedureException(node.toString());<a name="line.594"></a>
-<span class="sourceLineNo">595</span>    }<a name="line.595"></a>
-<span class="sourceLineNo">596</span><a name="line.596"></a>
-<span class="sourceLineNo">597</span>    ProcedureSyncWait.waitForProcedureToCompleteIOE(<a name="line.597"></a>
-<span class="sourceLineNo">598</span>      master.getMasterProcedureExecutor(), proc, timeout);<a name="line.598"></a>
-<span class="sourceLineNo">599</span>    return true;<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>  // ============================================================================================<a name="line.602"></a>
-<span class="sourceLineNo">603</span>  //  RegionTransition procedures helpers<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>  public AssignProcedure[] createAssignProcedures(final Collection&lt;RegionInfo&gt; regionInfo) {<a name="line.606"></a>
-<span class="sourceLineNo">607</span>    return createAssignProcedures(regionInfo, false);<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>  public AssignProcedure[] createAssignProcedures(final Collection&lt;RegionInfo&gt; regionInfo,<a name="line.610"></a>
-<span class="sourceLineNo">611</span>      final boolean forceNewPlan) {<a name="line.611"></a>
-<span class="sourceLineNo">612</span>    if (regionInfo.isEmpty()) return null;<a name="line.612"></a>
-<span class="sourceLineNo">613</span>    final AssignProcedure[] procs = new AssignProcedure[regionInfo.size()];<a name="line.613"></a>
-<span class="sourceLineNo">614</span>    int index = 0;<a name="line.614"></a>
-<span class="sourceLineNo">615</span>    for (RegionInfo hri: regionInfo) {<a name="line.615"></a>
-<span class="sourceLineNo">616</span>      procs[index++] = createAssignProcedure(hri, forceNewPlan);<a name="line.616"></a>
-<span class="sourceLineNo">617</span>    }<a name="line.617"></a>
-<span class="sourceLineNo">618</span>    return procs;<a name="line.618"></a>
-<span class="sourceLineNo">619</span>  }<a name="line.619"></a>
-<span class="sourceLineNo">620</span><a name="line.620"></a>
-<span class="sourceLineNo">621</span>  // Needed for the following method so it can type the created Array we return<a name="line.621"></a>
-<span class="sourceLineNo">622</span>  private static final UnassignProcedure [] UNASSIGNED_PROCEDURE_FOR_TYPE_INFO =<a name="line.622"></a>
-<span class="sourceLineNo">623</span>      new UnassignProcedure[0];<a name="line.623"></a>
-<span class="sourceLineNo">624</span><a name="line.624"></a>
-<span class="sourceLineNo">625</span>  UnassignProcedure[] createUnassignProcedures(final Collection&lt;RegionStateNode&gt; nodes) {<a name="line.625"></a>
-<span class="sourceLineNo">626</span>    if (nodes.isEmpty()) return null;<a name="line.626"></a>
-<span class="sourceLineNo">627</span>    final List&lt;UnassignProcedure&gt; procs = new ArrayList&lt;UnassignProcedure&gt;(nodes.size());<a name="line.627"></a>
-<span class="sourceLineNo">628</span>    for (RegionStateNode node: nodes) {<a name="line.628"></a>
-<span class="sourceLineNo">629</span>      if (!this.regionStates.include(node, false)) continue;<a name="line.629"></a>
-<span class="sourceLineNo">630</span>      // Look for regions that are offline/closed; i.e. already unassigned.<a name="line.630"></a>
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-<span class="sourceLineNo">704</span>              + " because the server is not with highest version");<a name="line.704"></a>
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+<span class="sourceLineNo">448</span>  // ============================================================================================<a name="line.448"></a>
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+<span class="sourceLineNo">450</span>  // ============================================================================================<a name="line.450"></a>
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+<span class="sourceLineNo">468</span><a name="line.468"></a>
+<span class="sourceLineNo">469</span>  /**<a name="line.469"></a>
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+<span class="sourceLineNo">473</span>   * some incompatible changes.<a name="line.473"></a>
+<span class="sourceLineNo">474</span>   */<a name="line.474"></a>
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+<span class="sourceLineNo">476</span>    new Thread(() -&gt; {<a name="line.476"></a>
+<span class="sourceLineNo">477</span>      try {<a name="line.477"></a>
+<span class="sourceLineNo">478</span>        synchronized (checkIfShouldMoveSystemRegionLock) {<a name="line.478"></a>
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+<span class="sourceLineNo">483</span>              // considers only online servers, the server could be queued for dead server<a name="line.483"></a>
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+<span class="sourceLineNo">487</span>              // handling.<a name="line.487"></a>
+<span class="sourceLineNo">488</span>              continue;<a name="line.488"></a>
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+<span class="sourceLineNo">492</span>              for (RegionInfo regionInfo : regionsShouldMove) {<a name="line.492"></a>
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+<span class="sourceLineNo">502</span>            }<a name="line.502"></a>
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+<span class="sourceLineNo">508</span>      } catch (Throwable t) {<a name="line.508"></a>
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+<span class="sourceLineNo">511</span>    }).start();<a name="line.511"></a>
+<span class="sourceLineNo">512</span>  }<a name="line.512"></a>
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+<span class="sourceLineNo">520</span>        .map(RegionStateNode::getRegionInfo)<a name="line.520"></a>
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+<span class="sourceLineNo">524</span><a name="line.524"></a>
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+<span class="sourceLineNo">527</span>  }<a name="line.527"></a>
+<span class="sourceLineNo">528</span><a name="line.528"></a>
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+<span class="sourceLineNo">533</span><a name="line.533"></a>
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+<span class="sourceLineNo">537</span><a name="line.537"></a>
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+<span class="sourceLineNo">540</span>    // TODO: rename this reassign<a name="line.540"></a>
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+<span class="sourceLineNo">550</span><a name="line.550"></a>
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+<span class="sourceLineNo">555</span>    MoveRegionProcedure proc = createMoveRegionProcedure(plan);<a name="line.555"></a>
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+<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>
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+<span class="sourceLineNo">563</span><a name="line.563"></a>
+<span class="sourceLineNo">564</span>  @VisibleForTesting<a name="line.564"></a>
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+<span class="sourceLineNo">568</span><a name="line.568"></a>
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+<span class="sourceLineNo">570</span>  // TODO: Remove this?<a name="line.570"></a>
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+<span class="sourceLineNo">575</span>    // so wait around here a while.<a name="line.575"></a>
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+<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>
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+<span class="sourceLineNo">590</span><a name="line.590"></a>
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+<span class="sourceLineNo">595</span><a name="line.595"></a>
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+<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>
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+<span class="sourceLineNo">608</span><a name="line.608"></a>
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+<span class="sourceLineNo">613</span>    int index = 0;<a name="line.613"></a>
+<span class="sourceLineNo">614</span>    for (RegionInfo hri: regionInfo) {<a name="line.614"></a>
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+<span class="sourceLineNo">619</span><a name="line.619"></a>
+<span class="sourceLineNo">620</span>  // Needed for the following method so it can type the created Array we return<a name="line.620"></a>
+<span class="sourceLineNo">621</span>  private static final UnassignProcedure [] UNASSIGNED_PROCEDURE_FOR_TYPE_INFO =<a name="line.621"></a>
+<span class="sourceLineNo">622</span>      new UnassignProcedure[0];<a name="line.622"></a>
+<span class="sourceLineNo">623</span><a name="line.623"></a>
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+<span class="sourceLineNo">633</span>    }<a name="line.633"></a>
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+<span class="sourceLineNo">636</span><a name="line.636"></a>
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+<span class="sourceLineNo">639</span>    int index = 0;<a name="line.639"></a>
+<span class="sourceLineNo">640</span>    for (RegionInfo hri: regionInfo) {<a name="line.640"></a>
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+<span class="sourceLineNo">644</span>    }<a name="line.644"></a>
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+<span class="sourceLineNo">646</span>  }<a name="line.646"></a>
+<span class="sourceLineNo">647</span><a name="line.647"></a>
+<span class="sourceLineNo">648</span>  /**<a name="line.648"></a>
+<span class="sourceLineNo">649</span>   * Called by things like EnableTableProcedure to get a list of AssignProcedure<a name="line.649"></a>
+<span class="sourceLineNo">650</span>   * to assign the regions of the table.<a name="line.650"></a>
+<span class="sourceLineNo">651</span>   */<a name="line.651"></a>
+<span class="sourceLineNo">652</span>  public AssignProcedure[] createAssignProcedures(final TableName tableName) {<a name="line.652"></a>
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+<span class="sourceLineNo">654</span>  }<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>   * Called by things like DisableTableProcedure to get a list of UnassignProcedure<a name="line.657"></a>
+<span class="sourceLineNo">658</span>   * to unassign the regions of the table.<a name="line.658"></a>
+<span class="sourceLineNo">659</span>   */<a name="line.659"></a>
+<span class="sourceLineNo">660</span>  public UnassignProcedure[] createUnassignProcedures(final TableName tableName) {<a name="line.660"></a>
+<span class="sourceLineNo">661</span>    return createUnassignProcedures(regionStates.getTableRegionStateNodes(tableName));<a name="line.661"></a>
+<span class="sourceLineNo">662</span>  }<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>   * Called by things like ModifyColumnFamilyProcedure to get a list of MoveRegionProcedure<a name="line.665"></a>
+<span class="sourceLineNo">666</span>   * to reopen the regions of the table.<a name="line.666"></a>
+<span class="sourceLineNo">667</span>   */<a name="line.667"></a>
+<span class="sourceLineNo">668</span>  public MoveRegionProcedure[] createReopenProcedures(final TableName tableName) {<a name="line.668"></a>
+<span class="sourceLineNo">669</span>    return createReopenProcedures(regionStates.getRegionsOfTable(tableName));<a name="line.669"></a>
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+<span class="sourceLineNo">671</span><a name="line.671"></a>
+<span class="sourceLineNo">672</span>  public AssignProcedure createAssignProcedure(final RegionInfo regionInfo,<a name="line.672"></a>
+<span class="sourceLineNo">673</span>      final boolean forceNewPlan) {<a name="line.673"></a>
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+<span class="sourceLineNo">676</span>    return proc;<a name="line.676"></a>
+<span class="sourceLineNo">677</span>  }<a name="line.677"></a>
+<span class="sourceLineNo">678</span><a name="line.678"></a>
+<span class="sourceLineNo">679</span>  public AssignProcedure createAssignProcedure(final RegionInfo regionInfo,<a name="line.679"></a>
+<span class="sourceLineNo">680</span>      final ServerName targetServer) {<a name="line.680"></a>
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+<span class="sourceLineNo">682</span>    proc.setOwner(getProcedureEnvironment().getRequestUser().getShortName());<a name="line.682"></a>
+<span class="sourceLineNo">683</span>    return proc;<a name="line.683"></a>
+<span class="sourceLineNo">684</span>  }<a name="line.684"></a>
+<span class="sourceLineNo">685</span><a name="line.685"></a>
+<span class="sourceLineNo">686</span>  public UnassignProcedure createUnassignProcedure(final RegionInfo regionInfo,<a name="line.686"></a>
+<span class="sourceLineNo">687</span>      final ServerName destinationServer, final boolean force) {<a name="line.687"></a>
+<span class="sourceLineNo">688</span>    // If destinationServer is null, figure it.<a name="line.688"></a>
+<span class="sourceLineNo">689</span>    ServerName sn = destinationServer != null? destinationServer:<a name="line.689"></a>
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+<span class="sourceLineNo">691</span>    assert sn != null;<a name="line.691"></a>
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+<span class="sourceLineNo">693</span>    proc.setOwner(getProcedureEnvironment().getRequestUser().getShortName());<a name="line.693"></a>
+<span class="sourceLineNo">694</span>    return proc;<a name="line.694"></a>
+<span class="sourceLineNo">695</span>  }<a name="line.695"></a>
+<span class="sourceLineNo">696</span><a name="line.696"></a>
+<span class="sourceLineNo">697</span>  public MoveRegionProcedure createMoveRegionProcedure(final RegionPlan plan) {<a name="line.697"></a>
+<span class="sourceLineNo">698</span>    if (plan.getRegionInfo().getTable().isSystemTable()) {<a name="line.698"></a>
+<span class="sourceLineNo">699</span>      List&lt;ServerName&gt; exclude = getExcludedServersForSystemTable();<a name="line.699"></a>
+<span class="sourceLineNo">700</span>      if (plan.getDestination() != null &amp;&amp; exclude.contains(plan.getDestination())) {<a name="line.700"></a>
+<span class="sourceLineNo">701</span>        try {<a name="line.701"></a>
+<span class="sourceLineNo">702</span>          LOG.info("Can not move " + plan.getRegionInfo() + " to " + plan.getDestination()<a name="line.702"></a>
+<span class="sourceLineNo">703</span>              + " because the server is not with highest version");<a name="line.703"></a>
+<span class="sourceLineNo">704</span>          plan.setDestination(getBalancer().randomAssignment(plan.getRegionInfo(),<a name="line.704"></a>
+<span class="sourceLineNo">705</span>              this.master.getServerManager().createDestinationServersList(exclude)));<a name="line.705"></a>
+<span class="sourceLineNo">706</span>        } catch (HBaseIOException e) {<a name="line.706"></a>
+<span class="sourceLineNo">707</span>          LOG.warn(e);<a name="line.707"></a>
+<span class="sourceLineNo">708</span>        }<a name="line.708"></a>
+<span class="sourceLineNo">709</span>      }<a name="line.709"></a>
+<span class="sourceLineNo">710</span>    }<a name="line.710"></a>
+<span class="sourceLineNo">711</span>    return new MoveRegionProcedure(getProcedureEnvironment(), plan);<a name="line.711"></a>
+<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><a name="line.714"></a>
-<span class="sourceLineNo">715</span><a name="line.715"></a>
-<span class="sourceLineNo">716</span>  public SplitTableRegionProcedure createSplitProcedure(final RegionInfo regionToSplit,<a name="line.716"></a>
-<span class="sourceLineNo">717</span>      final byte[] splitKey) throws IOException {<a name="line.717"></a>
-<span class="sourceLineNo">718</span>    return new SplitTableRegionProcedure(getProcedureEnvironment(), regionToSplit, splitKey);<a name="line.718"></a>
-<span class="sourceLineNo">719</span>  }<a name="line.719"></a>
-<span class="sourceLineNo">720</span><a name="line.720"></a>
-<span class="sourceLineNo">721</span>  public MergeTableRegionsProcedure createMergeProcedure(final RegionInfo regionToMergeA,<a name="line.721"></a>
-<span class="sourceLineNo">722</span>      final RegionInfo regionToMergeB) throws IOException {<a name="line.722"></a>
-<span class="sourceLineNo">723</span>    return new MergeTableRegionsProcedure(getProcedureEnvironment(), regionToMergeA,regionToMergeB);<a name="line.723"></a>
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-<span class="sourceLineNo">725</span><a name="line.725"></a>
-<span class="sourceLineNo">726</span>  /**<a name="line.726"></a>
-<span class="sourceLineNo">727</span>   * Delete the region states. This is called by "DeleteTable"<a name="line.727"></a>
-<span class="sourceLineNo">728</span>   */<a name="line.728"></a>
-<span class="sourceLineNo">729</span>  public void deleteTable(final TableName tableName) throws IOException {<a name="line.729"></a>
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-<span class="sourceLineNo">731</span>    regionStateStore.deleteRegions(regions);<a name="line.731"></a>
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-<span class="sourceLineNo">733</span>      final RegionInfo regionInfo = regions.get(i);<a name="line.733"></a>
-<span class="sourceLineNo">734</span>      // we expect the region to be offline<a name="line.734"></a>
-<span class="sourceLineNo">735</span>      regionStates.removeFromOfflineRegions(regionInfo);<a name="line.735"></a>
-<span class="sourceLineNo">736</span>      regionStates.deleteRegion(regionInfo);<a name="line.736"></a>
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-<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>  //  RS Region Transition Report helpers<a name="line.741"></a>
-<span class="sourceLineNo">742</span>  // ============================================================================================<a name="line.742"></a>
-<span class="sourceLineNo">743</span>  // TODO: Move this code in MasterRpcServices and call on specific event?<a name="line.743"></a>
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-<span class="sourceLineNo">748</span>        ReportRegionStateTransitionResponse.newBuilder();<a name="line.748"></a>
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-<span class="sourceLineNo">753</span>          case OPENED:<a name="line.753"></a>
-<span class="sourceLineNo">754</span>          case FAILED_OPEN:<a name="line.754"></a>
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-<span class="sourceLineNo">758</span>            updateRegionTransition(serverName, transition.getTransitionCode(), hri,<a name="line.758"></a>
-<span class="sourceLineNo">759</span>                transition.hasOpenSeqNum() ? transition.getOpenSeqNum() : HConstants.NO_SEQNUM);<a name="line.759"></a>
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-<span class="sourceLineNo">762</span>          case SPLIT:<a name="line.762"></a>
-<span class="sourceLineNo">763</span>          case SPLIT_REVERTED:<a name="line.763"></a>
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-<span class="sourceLineNo">765</span>            final RegionInfo parent = ProtobufUtil.toRegionInfo(transition.getRegionInfo(0));<a name="line.765"></a>
-<span class="sourceLineNo">766</span>            final RegionInfo splitA = ProtobufUtil.toRegionInfo(transition.getRegionInfo(1));<a name="line.766"></a>
-<span class="sourceLineNo">767</span>            final RegionInfo splitB = ProtobufUtil.toRegionInfo(transition.getRegionInfo(2));<a name="line.767"></a>
-<span class="sourceLineNo">768</span>            updateRegionSplitTransition(serverName, transition.getTransitionCode(),<a name="line.768"></a>
-<span class="sourceLineNo">769</span>              parent, splitA, splitB);<a name="line.769"></a>
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-<span class="sourceLineNo">771</span>          case READY_TO_MERGE:<a name="line.771"></a>
-<span class="sourceLineNo">772</span>          case MERGED:<a name="line.772"></a>
-<span class="sourceLineNo">773</span>          case MERGE_REVERTED:<a name="line.773"></a>
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-<span class="sourceLineNo">775</span>            final RegionInfo merged = ProtobufUtil.toRegionInfo(transition.getRegionInfo(0));<a name="line.775"></a>
-<span class="sourceLineNo">776</span>            final RegionInfo mergeA = ProtobufUtil.toRegionInfo(transition.getRegionInfo(1));<a name="line.776"></a>
-<span class="sourceLineNo">777</span>            final RegionInfo mergeB = ProtobufUtil.toRegionInfo(transition.getRegionInfo(2));<a name="line.777"></a>
-<span class="sourceLineNo">778</span>            updateRegionMergeTransition(serverName, transition.getTransitionCode(),<a name="line.778"></a>
-<span class="sourceLineNo">779</span>              merged, mergeA, mergeB);<a name="line.779"></a>
-<span class="sourceLineNo">780</span>            break;<a name="line.780"></a>
-<span class="sourceLineNo">781</span>        }<a name="line.781"></a>
-<span class="sourceLineNo">782</span>      }<a name="line.782"></a>
-<span class="sourceLineNo">783</span>    } catch (PleaseHoldException e) {<a name="line.783"></a>
-<span class="sourceLineNo">784</span>      if (LOG.isTraceEnabled()) LOG.trace("Failed transition " + e.getMessage());<a name="line.784"></a>
-<span class="sourceLineNo">785</span>      throw e;<a name="line.785"></a>
-<span class="sourceLineNo">786</span>    } catch (UnsupportedOperationException|IOException e) {<a name="line.786"></a>
-<span class="sourceLineNo">787</span>      // TODO: at the moment we have a single error message and the RS will abort<a name="line.787"></a>
-<span class="sourceLineNo">788</span>      // if the master says that one of the region transitions failed.<a name="line.788"></a>
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-<span class="sourceLineNo">854</span>    // Submit the Split procedure<a name="line.854"></a>
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-<span class="sourceLineNo">875</span>        " for regionA=" + hriA + " regionB=" + hriB + " merged=" + merged +<a name="line.875"></a>
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-<span class="sourceLineNo">878</span><a name="line.878"></a>
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-<span class="sourceLineNo">885</span>    // If the RS is &lt; 2.0 throw an exception to abort the operation, we are handling the merge<a name="line.885"></a>
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-<span class="sourceLineNo">892</span>  // ============================================================================================<a name="line.892"></a>
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-<span class="sourceLineNo">930</span>      // The Heartbeat updates us of what regions are only. check and verify the state.<a name="line.930"></a>
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-<span class="sourceLineNo">934</span>    // wake report event<a name="line.934"></a>
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-<span class="sourceLineNo">946</span>              " while meta is loading");<a name="line.946"></a>
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-<span class="sourceLineNo">952</span>        LOG.info("META REPORTED: " + regionNode);<a

<TRUNCATED>

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