http://git-wip-us.apache.org/repos/asf/hbase-site/blob/346adc37/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionTransitionProcedure.html
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diff --git
a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionTransitionProcedure.html
b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionTransitionProcedure.html
index d8556be..d6a6b28 100644
---
a/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionTransitionProcedure.html
+++
b/devapidocs/src-html/org/apache/hadoop/hbase/master/assignment/RegionTransitionProcedure.html
@@ -56,365 +56,371 @@
<span class="sourceLineNo">048</span> * The AssignmentManager will notify this
procedure when the RS completes<a name="line.48"></a>
<span class="sourceLineNo">049</span> * the operation and reports the
transitioned state<a name="line.49"></a>
<span class="sourceLineNo">050</span> * (see the Assign and Unassign class for
more detail).<a name="line.50"></a>
-<span class="sourceLineNo">051</span> * <p>Procedures move from the
REGION_TRANSITION_QUEUE state when they are<a name="line.51"></a>
-<span class="sourceLineNo">052</span> * first submitted, to the
REGION_TRANSITION_DISPATCH state when the request<a name="line.52"></a>
-<span class="sourceLineNo">053</span> * to remote server is sent and the
Procedure is suspended waiting on external<a name="line.53"></a>
-<span class="sourceLineNo">054</span> * event to be woken again. Once the
external event is triggered, Procedure<a name="line.54"></a>
-<span class="sourceLineNo">055</span> * moves to the REGION_TRANSITION_FINISH
state.<a name="line.55"></a>
-<span class="sourceLineNo">056</span> *<a name="line.56"></a>
-<span class="sourceLineNo">057</span> * <p>NOTE: {@link AssignProcedure}
and {@link UnassignProcedure} should not be thought of<a name="line.57"></a>
-<span class="sourceLineNo">058</span> * as being asymmetric, at least
currently.<a name="line.58"></a>
-<span class="sourceLineNo">059</span> * <ul><a name="line.59"></a>
-<span class="sourceLineNo">060</span> * <li>{@link AssignProcedure}
moves through all the above described states and implements methods<a
name="line.60"></a>
-<span class="sourceLineNo">061</span> * associated with each while {@link
UnassignProcedure} starts at state<a name="line.61"></a>
-<span class="sourceLineNo">062</span> * REGION_TRANSITION_DISPATCH and state
REGION_TRANSITION_QUEUE is not supported.</li><a name="line.62"></a>
-<span class="sourceLineNo">063</span> *<a name="line.63"></a>
-<span class="sourceLineNo">064</span> * <li>When any step in {@link
AssignProcedure} fails, failure handler<a name="line.64"></a>
-<span class="sourceLineNo">065</span> *
AssignProcedure#handleFailure(MasterProcedureEnv, RegionStateNode) re-attempts
the<a name="line.65"></a>
-<span class="sourceLineNo">066</span> * assignment by setting the procedure
state to REGION_TRANSITION_QUEUE and forces<a name="line.66"></a>
-<span class="sourceLineNo">067</span> * assignment to a different target
server by setting {@link AssignProcedure#forceNewPlan}. When<a
name="line.67"></a>
-<span class="sourceLineNo">068</span> * the number of attempts reach hreshold
configuration 'hbase.assignment.maximum.attempts',<a name="line.68"></a>
-<span class="sourceLineNo">069</span> * the procedure is aborted. For {@link
UnassignProcedure}, similar re-attempts are<a name="line.69"></a>
-<span class="sourceLineNo">070</span> * intentionally not implemented. It is a
'one shot' procedure.<a name="line.70"></a>
-<span class="sourceLineNo">071</span> * </li><a name="line.71"></a>
-<span class="sourceLineNo">072</span> * </ul><a name="line.72"></a>
-<span class="sourceLineNo">073</span> *<a name="line.73"></a>
-<span class="sourceLineNo">074</span> * <p>TODO: Considering it is a
priority doing all we can to get make a region available as soon as possible,<a
name="line.74"></a>
-<span class="sourceLineNo">075</span> * re-attempting with any target makes
sense if specified target fails in case of<a name="line.75"></a>
-<span class="sourceLineNo">076</span> * {@link AssignProcedure}. For {@link
UnassignProcedure}, if communication with RS fails,<a name="line.76"></a>
-<span class="sourceLineNo">077</span> * similar re-attempt makes little sense
(what should be different from previous attempt?). Also it<a name="line.77"></a>
-<span class="sourceLineNo">078</span> * could be complex with current
implementation of<a name="line.78"></a>
-<span class="sourceLineNo">079</span> * {@link
RegionTransitionProcedure#execute(MasterProcedureEnv)} and {@link
UnassignProcedure}.<a name="line.79"></a>
-<span class="sourceLineNo">080</span> * We have made a choice of keeping
{@link UnassignProcedure} simple, where the procedure either<a
name="line.80"></a>
-<span class="sourceLineNo">081</span> * succeeds or fails depending on
communication with RS. As parent will have broader context, parent<a
name="line.81"></a>
-<span class="sourceLineNo">082</span> * can better handle the failed instance
of {@link UnassignProcedure}. Similar simplicity for<a name="line.82"></a>
-<span class="sourceLineNo">083</span> * {@link AssignProcedure} is desired and
should be explored/ discussed further.<a name="line.83"></a>
-<span class="sourceLineNo">084</span> */<a name="line.84"></a>
-<span class="sourceLineNo">085</span>@InterfaceAudience.Private<a
name="line.85"></a>
-<span class="sourceLineNo">086</span>public abstract class
RegionTransitionProcedure<a name="line.86"></a>
-<span class="sourceLineNo">087</span> extends
Procedure<MasterProcedureEnv><a name="line.87"></a>
-<span class="sourceLineNo">088</span> implements TableProcedureInterface,<a
name="line.88"></a>
-<span class="sourceLineNo">089</span>
RemoteProcedure<MasterProcedureEnv, ServerName> {<a name="line.89"></a>
-<span class="sourceLineNo">090</span> private static final Log LOG =
LogFactory.getLog(RegionTransitionProcedure.class);<a name="line.90"></a>
-<span class="sourceLineNo">091</span><a name="line.91"></a>
-<span class="sourceLineNo">092</span> protected final AtomicBoolean aborted =
new AtomicBoolean(false);<a name="line.92"></a>
-<span class="sourceLineNo">093</span><a name="line.93"></a>
-<span class="sourceLineNo">094</span> private RegionTransitionState
transitionState =<a name="line.94"></a>
-<span class="sourceLineNo">095</span>
RegionTransitionState.REGION_TRANSITION_QUEUE;<a name="line.95"></a>
-<span class="sourceLineNo">096</span> private HRegionInfo regionInfo;<a
name="line.96"></a>
-<span class="sourceLineNo">097</span> private volatile boolean lock =
false;<a name="line.97"></a>
-<span class="sourceLineNo">098</span><a name="line.98"></a>
-<span class="sourceLineNo">099</span> public RegionTransitionProcedure() {<a
name="line.99"></a>
-<span class="sourceLineNo">100</span> // Required by the Procedure
framework to create the procedure on replay<a name="line.100"></a>
-<span class="sourceLineNo">101</span> super();<a name="line.101"></a>
+<span class="sourceLineNo">051</span> *<a name="line.51"></a>
+<span class="sourceLineNo">052</span> * <p>Procedures move from the
REGION_TRANSITION_QUEUE state when they are<a name="line.52"></a>
+<span class="sourceLineNo">053</span> * first submitted, to the
REGION_TRANSITION_DISPATCH state when the request<a name="line.53"></a>
+<span class="sourceLineNo">054</span> * to remote server is sent and the
Procedure is suspended waiting on external<a name="line.54"></a>
+<span class="sourceLineNo">055</span> * event to be woken again. Once the
external event is triggered, Procedure<a name="line.55"></a>
+<span class="sourceLineNo">056</span> * moves to the REGION_TRANSITION_FINISH
state.<a name="line.56"></a>
+<span class="sourceLineNo">057</span> *<a name="line.57"></a>
+<span class="sourceLineNo">058</span> * <p>NOTE: {@link AssignProcedure}
and {@link UnassignProcedure} should not be thought of<a name="line.58"></a>
+<span class="sourceLineNo">059</span> * as being asymmetric, at least
currently.<a name="line.59"></a>
+<span class="sourceLineNo">060</span> * <ul><a name="line.60"></a>
+<span class="sourceLineNo">061</span> * <li>{@link AssignProcedure}
moves through all the above described states and implements methods<a
name="line.61"></a>
+<span class="sourceLineNo">062</span> * associated with each while {@link
UnassignProcedure} starts at state<a name="line.62"></a>
+<span class="sourceLineNo">063</span> * REGION_TRANSITION_DISPATCH and state
REGION_TRANSITION_QUEUE is not supported.</li><a name="line.63"></a>
+<span class="sourceLineNo">064</span> *<a name="line.64"></a>
+<span class="sourceLineNo">065</span> * <li>When any step in {@link
AssignProcedure} fails, failure handler<a name="line.65"></a>
+<span class="sourceLineNo">066</span> *
AssignProcedure#handleFailure(MasterProcedureEnv, RegionStateNode) re-attempts
the<a name="line.66"></a>
+<span class="sourceLineNo">067</span> * assignment by setting the procedure
state to REGION_TRANSITION_QUEUE and forces<a name="line.67"></a>
+<span class="sourceLineNo">068</span> * assignment to a different target
server by setting {@link AssignProcedure#forceNewPlan}. When<a
name="line.68"></a>
+<span class="sourceLineNo">069</span> * the number of attempts reach hreshold
configuration 'hbase.assignment.maximum.attempts',<a name="line.69"></a>
+<span class="sourceLineNo">070</span> * the procedure is aborted. For {@link
UnassignProcedure}, similar re-attempts are<a name="line.70"></a>
+<span class="sourceLineNo">071</span> * intentionally not implemented. It is a
'one shot' procedure. See its class doc for how it<a name="line.71"></a>
+<span class="sourceLineNo">072</span> * handles failure.<a name="line.72"></a>
+<span class="sourceLineNo">073</span> * </li><a name="line.73"></a>
+<span class="sourceLineNo">074</span> * </ul><a name="line.74"></a>
+<span class="sourceLineNo">075</span> *<a name="line.75"></a>
+<span class="sourceLineNo">076</span> * <p>TODO: Considering it is a
priority doing all we can to get make a region available as soon as possible,<a
name="line.76"></a>
+<span class="sourceLineNo">077</span> * re-attempting with any target makes
sense if specified target fails in case of<a name="line.77"></a>
+<span class="sourceLineNo">078</span> * {@link AssignProcedure}. For {@link
UnassignProcedure}, our concern is preventing data loss<a name="line.78"></a>
+<span class="sourceLineNo">079</span> * on failed unassign. See class doc for
explanation.<a name="line.79"></a>
+<span class="sourceLineNo">080</span> */<a name="line.80"></a>
+<span class="sourceLineNo">081</span>@InterfaceAudience.Private<a
name="line.81"></a>
+<span class="sourceLineNo">082</span>public abstract class
RegionTransitionProcedure<a name="line.82"></a>
+<span class="sourceLineNo">083</span> extends
Procedure<MasterProcedureEnv><a name="line.83"></a>
+<span class="sourceLineNo">084</span> implements TableProcedureInterface,<a
name="line.84"></a>
+<span class="sourceLineNo">085</span>
RemoteProcedure<MasterProcedureEnv, ServerName> {<a name="line.85"></a>
+<span class="sourceLineNo">086</span> private static final Log LOG =
LogFactory.getLog(RegionTransitionProcedure.class);<a name="line.86"></a>
+<span class="sourceLineNo">087</span><a name="line.87"></a>
+<span class="sourceLineNo">088</span> protected final AtomicBoolean aborted =
new AtomicBoolean(false);<a name="line.88"></a>
+<span class="sourceLineNo">089</span><a name="line.89"></a>
+<span class="sourceLineNo">090</span> private RegionTransitionState
transitionState =<a name="line.90"></a>
+<span class="sourceLineNo">091</span>
RegionTransitionState.REGION_TRANSITION_QUEUE;<a name="line.91"></a>
+<span class="sourceLineNo">092</span> private HRegionInfo regionInfo;<a
name="line.92"></a>
+<span class="sourceLineNo">093</span> private volatile boolean lock =
false;<a name="line.93"></a>
+<span class="sourceLineNo">094</span><a name="line.94"></a>
+<span class="sourceLineNo">095</span> public RegionTransitionProcedure() {<a
name="line.95"></a>
+<span class="sourceLineNo">096</span> // Required by the Procedure
framework to create the procedure on replay<a name="line.96"></a>
+<span class="sourceLineNo">097</span> super();<a name="line.97"></a>
+<span class="sourceLineNo">098</span> }<a name="line.98"></a>
+<span class="sourceLineNo">099</span><a name="line.99"></a>
+<span class="sourceLineNo">100</span> public RegionTransitionProcedure(final
HRegionInfo regionInfo) {<a name="line.100"></a>
+<span class="sourceLineNo">101</span> this.regionInfo = regionInfo;<a
name="line.101"></a>
<span class="sourceLineNo">102</span> }<a name="line.102"></a>
<span class="sourceLineNo">103</span><a name="line.103"></a>
-<span class="sourceLineNo">104</span> public RegionTransitionProcedure(final
HRegionInfo regionInfo) {<a name="line.104"></a>
-<span class="sourceLineNo">105</span> this.regionInfo = regionInfo;<a
name="line.105"></a>
+<span class="sourceLineNo">104</span> public HRegionInfo getRegionInfo() {<a
name="line.104"></a>
+<span class="sourceLineNo">105</span> return regionInfo;<a
name="line.105"></a>
<span class="sourceLineNo">106</span> }<a name="line.106"></a>
<span class="sourceLineNo">107</span><a name="line.107"></a>
-<span class="sourceLineNo">108</span> public HRegionInfo getRegionInfo() {<a
name="line.108"></a>
-<span class="sourceLineNo">109</span> return regionInfo;<a
name="line.109"></a>
-<span class="sourceLineNo">110</span> }<a name="line.110"></a>
-<span class="sourceLineNo">111</span><a name="line.111"></a>
-<span class="sourceLineNo">112</span> protected void setRegionInfo(final
HRegionInfo regionInfo) {<a name="line.112"></a>
-<span class="sourceLineNo">113</span> // Setter is for deserialization.<a
name="line.113"></a>
-<span class="sourceLineNo">114</span> this.regionInfo = regionInfo;<a
name="line.114"></a>
-<span class="sourceLineNo">115</span> }<a name="line.115"></a>
-<span class="sourceLineNo">116</span><a name="line.116"></a>
-<span class="sourceLineNo">117</span> @Override<a name="line.117"></a>
-<span class="sourceLineNo">118</span> public TableName getTableName() {<a
name="line.118"></a>
-<span class="sourceLineNo">119</span> HRegionInfo hri = getRegionInfo();<a
name="line.119"></a>
-<span class="sourceLineNo">120</span> return hri != null? hri.getTable():
null;<a name="line.120"></a>
+<span class="sourceLineNo">108</span> protected void setRegionInfo(final
HRegionInfo regionInfo) {<a name="line.108"></a>
+<span class="sourceLineNo">109</span> // Setter is for deserialization.<a
name="line.109"></a>
+<span class="sourceLineNo">110</span> this.regionInfo = regionInfo;<a
name="line.110"></a>
+<span class="sourceLineNo">111</span> }<a name="line.111"></a>
+<span class="sourceLineNo">112</span><a name="line.112"></a>
+<span class="sourceLineNo">113</span> @Override<a name="line.113"></a>
+<span class="sourceLineNo">114</span> public TableName getTableName() {<a
name="line.114"></a>
+<span class="sourceLineNo">115</span> HRegionInfo hri = getRegionInfo();<a
name="line.115"></a>
+<span class="sourceLineNo">116</span> return hri != null? hri.getTable():
null;<a name="line.116"></a>
+<span class="sourceLineNo">117</span> }<a name="line.117"></a>
+<span class="sourceLineNo">118</span><a name="line.118"></a>
+<span class="sourceLineNo">119</span> public boolean isMeta() {<a
name="line.119"></a>
+<span class="sourceLineNo">120</span> return
TableName.isMetaTableName(getTableName());<a name="line.120"></a>
<span class="sourceLineNo">121</span> }<a name="line.121"></a>
<span class="sourceLineNo">122</span><a name="line.122"></a>
-<span class="sourceLineNo">123</span> public boolean isMeta() {<a
name="line.123"></a>
-<span class="sourceLineNo">124</span> return
TableName.isMetaTableName(getTableName());<a name="line.124"></a>
-<span class="sourceLineNo">125</span> }<a name="line.125"></a>
-<span class="sourceLineNo">126</span><a name="line.126"></a>
-<span class="sourceLineNo">127</span> @Override<a name="line.127"></a>
-<span class="sourceLineNo">128</span> public void toStringClassDetails(final
StringBuilder sb) {<a name="line.128"></a>
-<span class="sourceLineNo">129</span>
sb.append(getClass().getSimpleName());<a name="line.129"></a>
-<span class="sourceLineNo">130</span> sb.append(" table=");<a
name="line.130"></a>
-<span class="sourceLineNo">131</span> sb.append(getTableName());<a
name="line.131"></a>
-<span class="sourceLineNo">132</span> sb.append(", region=");<a
name="line.132"></a>
-<span class="sourceLineNo">133</span> sb.append(getRegionInfo() == null?
null: getRegionInfo().getEncodedName());<a name="line.133"></a>
-<span class="sourceLineNo">134</span> }<a name="line.134"></a>
-<span class="sourceLineNo">135</span><a name="line.135"></a>
-<span class="sourceLineNo">136</span> public RegionStateNode
getRegionState(final MasterProcedureEnv env) {<a name="line.136"></a>
-<span class="sourceLineNo">137</span> return
env.getAssignmentManager().getRegionStates().<a name="line.137"></a>
-<span class="sourceLineNo">138</span>
getOrCreateRegionNode(getRegionInfo());<a name="line.138"></a>
+<span class="sourceLineNo">123</span> @Override<a name="line.123"></a>
+<span class="sourceLineNo">124</span> public void toStringClassDetails(final
StringBuilder sb) {<a name="line.124"></a>
+<span class="sourceLineNo">125</span>
sb.append(getClass().getSimpleName());<a name="line.125"></a>
+<span class="sourceLineNo">126</span> sb.append(" table=");<a
name="line.126"></a>
+<span class="sourceLineNo">127</span> sb.append(getTableName());<a
name="line.127"></a>
+<span class="sourceLineNo">128</span> sb.append(", region=");<a
name="line.128"></a>
+<span class="sourceLineNo">129</span> sb.append(getRegionInfo() == null?
null: getRegionInfo().getEncodedName());<a name="line.129"></a>
+<span class="sourceLineNo">130</span> }<a name="line.130"></a>
+<span class="sourceLineNo">131</span><a name="line.131"></a>
+<span class="sourceLineNo">132</span> public RegionStateNode
getRegionState(final MasterProcedureEnv env) {<a name="line.132"></a>
+<span class="sourceLineNo">133</span> return
env.getAssignmentManager().getRegionStates().<a name="line.133"></a>
+<span class="sourceLineNo">134</span>
getOrCreateRegionNode(getRegionInfo());<a name="line.134"></a>
+<span class="sourceLineNo">135</span> }<a name="line.135"></a>
+<span class="sourceLineNo">136</span><a name="line.136"></a>
+<span class="sourceLineNo">137</span> protected void setTransitionState(final
RegionTransitionState state) {<a name="line.137"></a>
+<span class="sourceLineNo">138</span> this.transitionState = state;<a
name="line.138"></a>
<span class="sourceLineNo">139</span> }<a name="line.139"></a>
<span class="sourceLineNo">140</span><a name="line.140"></a>
-<span class="sourceLineNo">141</span> protected void setTransitionState(final
RegionTransitionState state) {<a name="line.141"></a>
-<span class="sourceLineNo">142</span> this.transitionState = state;<a
name="line.142"></a>
+<span class="sourceLineNo">141</span> protected RegionTransitionState
getTransitionState() {<a name="line.141"></a>
+<span class="sourceLineNo">142</span> return transitionState;<a
name="line.142"></a>
<span class="sourceLineNo">143</span> }<a name="line.143"></a>
<span class="sourceLineNo">144</span><a name="line.144"></a>
-<span class="sourceLineNo">145</span> protected RegionTransitionState
getTransitionState() {<a name="line.145"></a>
-<span class="sourceLineNo">146</span> return transitionState;<a
name="line.146"></a>
-<span class="sourceLineNo">147</span> }<a name="line.147"></a>
-<span class="sourceLineNo">148</span><a name="line.148"></a>
-<span class="sourceLineNo">149</span> protected abstract boolean
startTransition(MasterProcedureEnv env, RegionStateNode regionNode)<a
name="line.149"></a>
-<span class="sourceLineNo">150</span> throws IOException,
ProcedureSuspendedException;<a name="line.150"></a>
-<span class="sourceLineNo">151</span><a name="line.151"></a>
-<span class="sourceLineNo">152</span> /**<a name="line.152"></a>
-<span class="sourceLineNo">153</span> * Called when the Procedure is in the
REGION_TRANSITION_DISPATCH state.<a name="line.153"></a>
-<span class="sourceLineNo">154</span> * In here we do the RPC call to
OPEN/CLOSE the region. The suspending of<a name="line.154"></a>
-<span class="sourceLineNo">155</span> * the thread so it sleeps until it
gets update that the OPEN/CLOSE has<a name="line.155"></a>
-<span class="sourceLineNo">156</span> * succeeded is complicated. Read the
implementations to learn more.<a name="line.156"></a>
-<span class="sourceLineNo">157</span> */<a name="line.157"></a>
-<span class="sourceLineNo">158</span> protected abstract boolean
updateTransition(MasterProcedureEnv env, RegionStateNode regionNode)<a
name="line.158"></a>
-<span class="sourceLineNo">159</span> throws IOException,
ProcedureSuspendedException;<a name="line.159"></a>
-<span class="sourceLineNo">160</span><a name="line.160"></a>
-<span class="sourceLineNo">161</span> protected abstract void
finishTransition(MasterProcedureEnv env, RegionStateNode regionNode)<a
name="line.161"></a>
-<span class="sourceLineNo">162</span> throws IOException,
ProcedureSuspendedException;<a name="line.162"></a>
-<span class="sourceLineNo">163</span><a name="line.163"></a>
-<span class="sourceLineNo">164</span> protected abstract void
reportTransition(MasterProcedureEnv env,<a name="line.164"></a>
-<span class="sourceLineNo">165</span> RegionStateNode regionNode,
TransitionCode code, long seqId) throws UnexpectedStateException;<a
name="line.165"></a>
-<span class="sourceLineNo">166</span><a name="line.166"></a>
-<span class="sourceLineNo">167</span> public abstract RemoteOperation
remoteCallBuild(MasterProcedureEnv env, ServerName serverName);<a
name="line.167"></a>
-<span class="sourceLineNo">168</span> protected abstract void
remoteCallFailed(MasterProcedureEnv env,<a name="line.168"></a>
-<span class="sourceLineNo">169</span> RegionStateNode regionNode,
IOException exception);<a name="line.169"></a>
-<span class="sourceLineNo">170</span><a name="line.170"></a>
-<span class="sourceLineNo">171</span> @Override<a name="line.171"></a>
-<span class="sourceLineNo">172</span> public void remoteCallCompleted(final
MasterProcedureEnv env,<a name="line.172"></a>
-<span class="sourceLineNo">173</span> final ServerName serverName, final
RemoteOperation response) {<a name="line.173"></a>
-<span class="sourceLineNo">174</span> // Ignore the response?
reportTransition() is the one that count?<a name="line.174"></a>
-<span class="sourceLineNo">175</span> }<a name="line.175"></a>
-<span class="sourceLineNo">176</span><a name="line.176"></a>
-<span class="sourceLineNo">177</span> @Override<a name="line.177"></a>
-<span class="sourceLineNo">178</span> public void remoteCallFailed(final
MasterProcedureEnv env,<a name="line.178"></a>
-<span class="sourceLineNo">179</span> final ServerName serverName, final
IOException exception) {<a name="line.179"></a>
-<span class="sourceLineNo">180</span> final RegionStateNode regionNode =
getRegionState(env);<a name="line.180"></a>
-<span class="sourceLineNo">181</span> assert
serverName.equals(regionNode.getRegionLocation());<a name="line.181"></a>
-<span class="sourceLineNo">182</span> String msg = exception.getMessage()
== null? exception.getClass().getSimpleName():<a name="line.182"></a>
-<span class="sourceLineNo">183</span> exception.getMessage();<a
name="line.183"></a>
-<span class="sourceLineNo">184</span> LOG.warn("Failed " + this + "; " +
regionNode.toShortString() + "; exception=" + msg);<a name="line.184"></a>
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exception);<a name="line.185"></a>
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this Procedure back on the scheduler.<a name="line.186"></a>
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in here so DO NOT MESS WITH STATE beyond<a name="line.187"></a>
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current processing quickly.<a name="line.188"></a>
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env.getProcedureScheduler().wakeEvent(regionNode.getProcedureEvent());<a
name="line.189"></a>
-<span class="sourceLineNo">190</span> }<a name="line.190"></a>
-<span class="sourceLineNo">191</span><a name="line.191"></a>
-<span class="sourceLineNo">192</span> /**<a name="line.192"></a>
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method, the procedure has either succeeded<a name="line.193"></a>
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a suspended state OR, we failed and<a name="line.194"></a>
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the scheduler ready for another worker<a name="line.195"></a>
-<span class="sourceLineNo">196</span> * to pick it up. In both cases, we
need to exit the current Worker processing<a name="line.196"></a>
-<span class="sourceLineNo">197</span> * toute de suite!<a
name="line.197"></a>
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dispatched the call and false if we failed;<a name="line.198"></a>
-<span class="sourceLineNo">199</span> * if failed, we need to roll back any
setup done for the dispatch.<a name="line.199"></a>
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addToRemoteDispatcher(final MasterProcedureEnv env,<a name="line.201"></a>
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name="line.202"></a>
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getRegionLocation=" +<a name="line.204"></a>
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getRegionState(env).getRegionLocation(); // TODO<a name="line.205"></a>
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mode to wait on report of state change<a name="line.209"></a>
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Procedure associated ProcedureEvent is marked not 'ready'.<a
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env.getProcedureScheduler().suspendEvent(getRegionState(env).getProcedureEvent());<a
name="line.211"></a>
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it fails need to backtrack on stuff like<a name="line.213"></a>
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as the 'wake' requeues us -- and ditto<a name="line.214"></a>
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state changes.<a name="line.215"></a>
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(!env.getRemoteDispatcher().addOperationToNode(targetServer, this)) {<a
name="line.216"></a>
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targetServer,<a name="line.217"></a>
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FailedRemoteDispatchException(this + " to " + targetServer));<a
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long seqId) throws UnexpectedStateException {<a name="line.225"></a>
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getRegionState(env);<a name="line.226"></a>
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name="line.227"></a>
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+ " seqId=" + seqId + ", " +<a name="line.228"></a>
-<span class="sourceLineNo">229</span> this + "; " +
regionNode.toShortString());<a name="line.229"></a>
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regionNode.setRegionLocation(serverName);<a name="line.233"></a>
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UnexpectedStateException(String.format(<a name="line.235"></a>
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server=%s; expected server=%s; %s; %s",<a name="line.236"></a>
-<span class="sourceLineNo">237</span> code, serverName,
regionNode.getRegionLocation(),<a name="line.237"></a>
-<span class="sourceLineNo">238</span> this,
regionNode.toShortString()));<a name="line.238"></a>
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code, seqId);<a name="line.242"></a>
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procedure back on the scheduler.<a name="line.244"></a>
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can run again. Another worker will take<a name="line.245"></a>
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an extreme, the other worker may run in<a name="line.246"></a>
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state hereafter! This should be last thing<a name="line.247"></a>
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name="line.248"></a>
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env.getProcedureScheduler().wakeEvent(regionNode.getProcedureEvent());<a
name="line.249"></a>
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MasterProcedureEnv env, final RegionStateNode regionNode) {<a
name="line.252"></a>
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regionNode.getRegionLocation());<a name="line.253"></a>
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MasterProcedureEnv env, final ServerName serverName) {<a name="line.256"></a>
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env.getMasterServices().getServerManager().isServerOnline(serverName);<a
name="line.257"></a>
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-<span class="sourceLineNo">260</span> @Override<a name="line.260"></a>
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toStringState(StringBuilder builder) {<a name="line.261"></a>
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name="line.262"></a>
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this.transitionState;<a name="line.263"></a>
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null) {<a name="line.264"></a>
-<span class="sourceLineNo">265</span> builder.append(":").append(ts);<a
name="line.265"></a>
-<span class="sourceLineNo">266</span> }<a name="line.266"></a>
-<span class="sourceLineNo">267</span> }<a name="line.267"></a>
-<span class="sourceLineNo">268</span><a name="line.268"></a>
-<span class="sourceLineNo">269</span> @Override<a name="line.269"></a>
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MasterProcedureEnv env) throws ProcedureSuspendedException {<a
name="line.270"></a>
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env.getAssignmentManager();<a name="line.271"></a>
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getRegionState(env);<a name="line.272"></a>
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(!am.addRegionInTransition(regionNode, this)) {<a name="line.273"></a>
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name="line.274"></a>
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procedure running on this region this=%s owner=%s",<a name="line.275"></a>
-<span class="sourceLineNo">276</span> this,
regionNode.getProcedure());<a name="line.276"></a>
-<span class="sourceLineNo">277</span> LOG.warn(msg + " " + this + "; " +
regionNode.toShortString());<a name="line.277"></a>
-<span class="sourceLineNo">278</span>
setAbortFailure(getClass().getSimpleName(), msg);<a name="line.278"></a>
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-<span class="sourceLineNo">280</span> }<a name="line.280"></a>
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name="line.282"></a>
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name="line.284"></a>
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name="line.285"></a>
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name="line.286"></a>
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for balancer policy<a name="line.287"></a>
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regionNode)) {<a name="line.288"></a>
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is done or it aborted; check getException()<a name="line.289"></a>
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am.removeRegionInTransition(getRegionState(env), this);<a name="line.290"></a>
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name="line.291"></a>
-<span class="sourceLineNo">292</span> }<a name="line.292"></a>
-<span class="sourceLineNo">293</span> transitionState =
RegionTransitionState.REGION_TRANSITION_DISPATCH;<a name="line.293"></a>
-<span class="sourceLineNo">294</span> if
(env.getProcedureScheduler().waitEvent(regionNode.getProcedureEvent(), this))
{<a name="line.294"></a>
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Because we want to ensure Store happens before proceed?<a name="line.295"></a>
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ProcedureSuspendedException();<a name="line.296"></a>
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-<span class="sourceLineNo">299</span><a name="line.299"></a>
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REGION_TRANSITION_DISPATCH:<a name="line.300"></a>
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target server<a name="line.301"></a>
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regionNode)) {<a name="line.302"></a>
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is done or it aborted; check getException()<a name="line.303"></a>
-<span class="sourceLineNo">304</span>
am.removeRegionInTransition(regionNode, this);<a name="line.304"></a>
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name="line.305"></a>
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RegionTransitionState.REGION_TRANSITION_DISPATCH) {<a name="line.307"></a>
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name="line.308"></a>
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name="line.309"></a>
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(env.getProcedureScheduler().waitEvent(regionNode.getProcedureEvent(), this))
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ProcedureSuspendedException();<a name="line.312"></a>
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REGION_TRANSITION_FINISH:<a name="line.316"></a>
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response. completion/failure<a name="line.317"></a>
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regionNode);<a name="line.318"></a>
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am.removeRegionInTransition(regionNode, this);<a name="line.319"></a>
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name="line.320"></a>
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name="line.322"></a>
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name="line.323"></a>
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transition: " +<a name="line.324"></a>
-<span class="sourceLineNo">325</span> this + "; " +
regionNode.toShortString(), e);<a name="line.325"></a>
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name="line.328"></a>
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MasterProcedureEnv env) {<a name="line.332"></a>
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(isRollbackSupported(transitionState)) {<a name="line.333"></a>
-<span class="sourceLineNo">334</span> // Nothing done up to this point.
abort safely.<a name="line.334"></a>
-<span class="sourceLineNo">335</span> // This should happen when
something like disableTable() is triggered.<a name="line.335"></a>
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env.getAssignmentManager().removeRegionInTransition(getRegionState(env),
this);<a name="line.336"></a>
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assignment unless we cancel the operation by<a name="line.340"></a>
-<span class="sourceLineNo">341</span> // dropping/disabling the table.<a
name="line.341"></a>
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UnsupportedOperationException("Unhandled state " + transitionState +<a
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-<span class="sourceLineNo">343</span> "; there is no rollback for
assignment unless we cancel the operation by " +<a name="line.343"></a>
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table");<a name="line.344"></a>
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name="line.352"></a>
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for meta to be available and loaded.<a name="line.360"></a>
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(env.waitFailoverCleanup(this) ||<a name="line.361"></a>
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env.getAssignmentManager().waitMetaInitialized(this, getRegionInfo()))) {<a
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the executor<a name="line.366"></a>
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(env.getProcedureScheduler().waitRegion(this, getRegionInfo())) {<a
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LOG.debug(LockState.LOCK_EVENT_WAIT + " pid=" + getProcId() + " " +<a
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env.getProcedureScheduler().dumpLocks());<a name="line.370"></a>
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block<a name="line.372"></a>
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env.getProcedureScheduler().wakeRegion(this, getRegionInfo());<a
name="line.383"></a>
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startTransition(MasterProcedureEnv env, RegionStateNode regionNode)<a
name="line.145"></a>
+<span class="sourceLineNo">146</span> throws IOException,
ProcedureSuspendedException;<a name="line.146"></a>
+<span class="sourceLineNo">147</span><a name="line.147"></a>
+<span class="sourceLineNo">148</span> /**<a name="line.148"></a>
+<span class="sourceLineNo">149</span> * Called when the Procedure is in the
REGION_TRANSITION_DISPATCH state.<a name="line.149"></a>
+<span class="sourceLineNo">150</span> * In here we do the RPC call to
OPEN/CLOSE the region. The suspending of<a name="line.150"></a>
+<span class="sourceLineNo">151</span> * the thread so it sleeps until it
gets update that the OPEN/CLOSE has<a name="line.151"></a>
+<span class="sourceLineNo">152</span> * succeeded is complicated. Read the
implementations to learn more.<a name="line.152"></a>
+<span class="sourceLineNo">153</span> */<a name="line.153"></a>
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updateTransition(MasterProcedureEnv env, RegionStateNode regionNode)<a
name="line.154"></a>
+<span class="sourceLineNo">155</span> throws IOException,
ProcedureSuspendedException;<a name="line.155"></a>
+<span class="sourceLineNo">156</span><a name="line.156"></a>
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finishTransition(MasterProcedureEnv env, RegionStateNode regionNode)<a
name="line.157"></a>
+<span class="sourceLineNo">158</span> throws IOException,
ProcedureSuspendedException;<a name="line.158"></a>
+<span class="sourceLineNo">159</span><a name="line.159"></a>
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reportTransition(MasterProcedureEnv env,<a name="line.160"></a>
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TransitionCode code, long seqId) throws UnexpectedStateException;<a
name="line.161"></a>
+<span class="sourceLineNo">162</span><a name="line.162"></a>
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remoteCallBuild(MasterProcedureEnv env, ServerName serverName);<a
name="line.163"></a>
+<span class="sourceLineNo">164</span><a name="line.164"></a>
+<span class="sourceLineNo">165</span> /**<a name="line.165"></a>
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is complete; the procedure will be woken from its suspend<a name="line.166"></a>
+<span class="sourceLineNo">167</span> * and we'll go back to running through
procedure steps:<a name="line.167"></a>
+<span class="sourceLineNo">168</span> * otherwise if false we leave the
procedure in suspended state.<a name="line.168"></a>
+<span class="sourceLineNo">169</span> */<a name="line.169"></a>
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remoteCallFailed(MasterProcedureEnv env,<a name="line.170"></a>
+<span class="sourceLineNo">171</span> RegionStateNode regionNode,
IOException exception);<a name="line.171"></a>
+<span class="sourceLineNo">172</span><a name="line.172"></a>
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MasterProcedureEnv env,<a name="line.174"></a>
+<span class="sourceLineNo">175</span> final ServerName serverName, final
RemoteOperation response) {<a name="line.175"></a>
+<span class="sourceLineNo">176</span> // Ignore the response?
reportTransition() is the one that count?<a name="line.176"></a>
+<span class="sourceLineNo">177</span> }<a name="line.177"></a>
+<span class="sourceLineNo">178</span><a name="line.178"></a>
+<span class="sourceLineNo">179</span> @Override<a name="line.179"></a>
+<span class="sourceLineNo">180</span> public void remoteCallFailed(final
MasterProcedureEnv env,<a name="line.180"></a>
+<span class="sourceLineNo">181</span> final ServerName serverName, final
IOException exception) {<a name="line.181"></a>
+<span class="sourceLineNo">182</span> final RegionStateNode regionNode =
getRegionState(env);<a name="line.182"></a>
+<span class="sourceLineNo">183</span> assert
serverName.equals(regionNode.getRegionLocation());<a name="line.183"></a>
+<span class="sourceLineNo">184</span> String msg = exception.getMessage()
== null? exception.getClass().getSimpleName():<a name="line.184"></a>
+<span class="sourceLineNo">185</span> exception.getMessage();<a
name="line.185"></a>
+<span class="sourceLineNo">186</span> LOG.warn("Remote call failed " + this
+ "; " + regionNode.toShortString() +<a name="line.186"></a>
+<span class="sourceLineNo">187</span> "; exception=" + msg);<a
name="line.187"></a>
+<span class="sourceLineNo">188</span> if (remoteCallFailed(env, regionNode,
exception)) {<a name="line.188"></a>
+<span class="sourceLineNo">189</span> // NOTE: This call to wakeEvent
puts this Procedure back on the scheduler.<a name="line.189"></a>
+<span class="sourceLineNo">190</span> // Thereafter, another Worker can
be in here so DO NOT MESS WITH STATE beyond<a name="line.190"></a>
+<span class="sourceLineNo">191</span> // this method. Just get out of
this current processing quickly.<a name="line.191"></a>
+<span class="sourceLineNo">192</span>
env.getProcedureScheduler().wakeEvent(regionNode.getProcedureEvent());<a
name="line.192"></a>
+<span class="sourceLineNo">193</span> }<a name="line.193"></a>
+<span class="sourceLineNo">194</span> // else leave the procedure in
suspended state; it is waiting on another call to this callback<a
name="line.194"></a>
+<span class="sourceLineNo">195</span> }<a name="line.195"></a>
+<span class="sourceLineNo">196</span><a name="line.196"></a>
+<span class="sourceLineNo">197</span> /**<a name="line.197"></a>
+<span class="sourceLineNo">198</span> * Be careful! At the end of this
method, the procedure has either succeeded<a name="line.198"></a>
+<span class="sourceLineNo">199</span> * and this procedure has been set into
a suspended state OR, we failed and<a name="line.199"></a>
+<span class="sourceLineNo">200</span> * this procedure has been put back on
the scheduler ready for another worker<a name="line.200"></a>
+<span class="sourceLineNo">201</span> * to pick it up. In both cases, we
need to exit the current Worker processing<a name="line.201"></a>
+<span class="sourceLineNo">202</span> * toute de suite!<a
name="line.202"></a>
+<span class="sourceLineNo">203</span> * @return True if we successfully
dispatched the call and false if we failed;<a name="line.203"></a>
+<span class="sourceLineNo">204</span> * if failed, we need to roll back any
setup done for the dispatch.<a name="line.204"></a>
+<span class="sourceLineNo">205</span> */<a name="line.205"></a>
+<span class="sourceLineNo">206</span> protected boolean
addToRemoteDispatcher(final MasterProcedureEnv env,<a name="line.206"></a>
+<span class="sourceLineNo">207</span> final ServerName targetServer) {<a
name="line.207"></a>
+<span class="sourceLineNo">208</span> assert
targetServer.equals(getRegionState(env).getRegionLocation()) :<a
name="line.208"></a>
+<span class="sourceLineNo">209</span> "targetServer=" + targetServer + "
getRegionLocation=" +<a name="line.209"></a>
+<span class="sourceLineNo">210</span>
getRegionState(env).getRegionLocation(); // TODO<a name="line.210"></a>
+<span class="sourceLineNo">211</span><a name="line.211"></a>
+<span class="sourceLineNo">212</span> LOG.info("Dispatch " + this + "; " +
getRegionState(env).toShortString());<a name="line.212"></a>
+<span class="sourceLineNo">213</span><a name="line.213"></a>
+<span class="sourceLineNo">214</span> // Put this procedure into suspended
mode to wait on report of state change<a name="line.214"></a>
+<span class="sourceLineNo">215</span> // from remote regionserver. Means
Procedure associated ProcedureEvent is marked not 'ready'.<a
name="line.215"></a>
+<span class="sourceLineNo">216</span>
env.getProcedureScheduler().suspendEvent(getRegionState(env).getProcedureEvent());<a
name="line.216"></a>
+<span class="sourceLineNo">217</span><a name="line.217"></a>
+<span class="sourceLineNo">218</span> // Tricky because the below call to
addOperationToNode can fail. If it fails, we need to<a name="line.218"></a>
+<span class="sourceLineNo">219</span> // backtrack on stuff like the
'suspend' done above -- tricky as the 'wake' requeues us -- and<a
name="line.219"></a>
+<span class="sourceLineNo">220</span> // ditto up in the caller; it needs
to undo state changes. Inside in remoteCallFailed, it does<a
name="line.220"></a>
+<span class="sourceLineNo">221</span> // wake to undo the above suspend.<a
name="line.221"></a>
+<span class="sourceLineNo">222</span> if
(!env.getRemoteDispatcher().addOperationToNode(targetServer, this)) {<a
name="line.222"></a>
+<span class="sourceLineNo">223</span> remoteCallFailed(env,
targetServer,<a name="line.223"></a>
+<span class="sourceLineNo">224</span> new
FailedRemoteDispatchException(this + " to " + targetServer));<a
name="line.224"></a>
+<span class="sourceLineNo">225</span> return false;<a name="line.225"></a>
+<span class="sourceLineNo">226</span> }<a name="line.226"></a>
+<span class="sourceLineNo">227</span> return true;<a name="line.227"></a>
+<span class="sourceLineNo">228</span> }<a name="line.228"></a>
+<span class="sourceLineNo">229</span><a name="line.229"></a>
+<span class="sourceLineNo">230</span> protected void reportTransition(final
MasterProcedureEnv env, final ServerName serverName,<a name="line.230"></a>
+<span class="sourceLineNo">231</span> final TransitionCode code, final
long seqId) throws UnexpectedStateException {<a name="line.231"></a>
+<span class="sourceLineNo">232</span> final RegionStateNode regionNode =
getRegionState(env);<a name="line.232"></a>
+<span class="sourceLineNo">233</span> if (LOG.isDebugEnabled()) {<a
name="line.233"></a>
+<span class="sourceLineNo">234</span> LOG.debug("Received report " + code
+ " seqId=" + seqId + ", " +<a name="line.234"></a>
+<span class="sourceLineNo">235</span> this + "; " +
regionNode.toShortString());<a name="line.235"></a>
+<span class="sourceLineNo">236</span> }<a name="line.236"></a>
+<span class="sourceLineNo">237</span> if
(!serverName.equals(regionNode.getRegionLocation())) {<a name="line.237"></a>
+<span class="sourceLineNo">238</span> if (isMeta() &&
regionNode.getRegionLocation() == null) {<a name="line.238"></a>
+<span class="sourceLineNo">239</span>
regionNode.setRegionLocation(serverName);<a name="line.239"></a>
+<span class="sourceLineNo">240</span> } else {<a name="line.240"></a>
+<span class="sourceLineNo">241</span> throw new
UnexpectedStateException(String.format(<a name="line.241"></a>
+<span class="sourceLineNo">242</span> "Unexpected state=%s from
server=%s; expected server=%s; %s; %s",<a name="line.242"></a>
+<span class="sourceLineNo">243</span> code, serverName,
regionNode.getRegionLocation(),<a name="line.243"></a>
+<span class="sourceLineNo">244</span> this,
regionNode.toShortString()));<a name="line.244"></a>
+<span class="sourceLineNo">245</span> }<a name="line.245"></a>
+<span class="sourceLineNo">246</span> }<a name="line.246"></a>
+<span class="sourceLineNo">247</span><a name="line.247"></a>
+<span class="sourceLineNo">248</span> reportTransition(env, regionNode,
code, seqId);<a name="line.248"></a>
+<span class="sourceLineNo">249</span><a name="line.249"></a>
+<span class="sourceLineNo">250</span> // NOTE: This call adds this
procedure back on the scheduler.<a name="line.250"></a>
+<span class="sourceLineNo">251</span> // This makes it so this procedure
can run again. Another worker will take<a name="line.251"></a>
+<span class="sourceLineNo">252</span> // processing to the next stage. At
an extreme, the other worker may run in<a name="line.252"></a>
+<span class="sourceLineNo">253</span> // parallel so DO NOT CHANGE any
state hereafter! This should be last thing<a name="line.253"></a>
+<span class="sourceLineNo">254</span> // done in this processing step.<a
name="line.254"></a>
+<span class="sourceLineNo">255</span>
env.getProcedureScheduler().wakeEvent(regionNode.getProcedureEvent());<a
name="line.255"></a>
+<span class="sourceLineNo">256</span> }<a name="line.256"></a>
+<span class="sourceLineNo">257</span><a name="line.257"></a>
+<span class="sourceLineNo">258</span> protected boolean isServerOnline(final
MasterProcedureEnv env, final RegionStateNode regionNode) {<a
name="line.258"></a>
+<span class="sourceLineNo">259</span> return isServerOnline(env,
regionNode.getRegionLocation());<a name="line.259"></a>
+<span class="sourceLineNo">260</span> }<a name="line.260"></a>
+<span class="sourceLineNo">261</span><a name="line.261"></a>
+<span class="sourceLineNo">262</span> protected boolean isServerOnline(final
MasterProcedureEnv env, final ServerName serverName) {<a name="line.262"></a>
+<span class="sourceLineNo">263</span> return
env.getMasterServices().getServerManager().isServerOnline(serverName);<a
name="line.263"></a>
+<span class="sourceLineNo">264</span> }<a name="line.264"></a>
+<span class="sourceLineNo">265</span><a name="line.265"></a>
+<span class="sourceLineNo">266</span> @Override<a name="line.266"></a>
+<span class="sourceLineNo">267</span> protected void
toStringState(StringBuilder builder) {<a name="line.267"></a>
+<span class="sourceLineNo">268</span> super.toStringState(builder);<a
name="line.268"></a>
+<span class="sourceLineNo">269</span> RegionTransitionState ts =
this.transitionState;<a name="line.269"></a>
+<span class="sourceLineNo">270</span> if (!isFinished() && ts !=
null) {<a name="line.270"></a>
+<span class="sourceLineNo">271</span> builder.append(":").append(ts);<a
name="line.271"></a>
+<span class="sourceLineNo">272</span> }<a name="line.272"></a>
+<span class="sourceLineNo">273</span> }<a name="line.273"></a>
+<span class="sourceLineNo">274</span><a name="line.274"></a>
+<span class="sourceLineNo">275</span> @Override<a name="line.275"></a>
+<span class="sourceLineNo">276</span> protected Procedure[] execute(final
MasterProcedureEnv env) throws ProcedureSuspendedException {<a
name="line.276"></a>
+<span class="sourceLineNo">277</span> final AssignmentManager am =
env.getAssignmentManager();<a name="line.277"></a>
+<span class="sourceLineNo">278</span> final RegionStateNode regionNode =
getRegionState(env);<a name="line.278"></a>
+<span class="sourceLineNo">279</span> if
(!am.addRegionInTransition(regionNode, this)) {<a name="line.279"></a>
+<span class="sourceLineNo">280</span> String msg = String.format(<a
name="line.280"></a>
+<span class="sourceLineNo">281</span> "There is already another
procedure running on this region this=%s owner=%s",<a name="line.281"></a>
+<span class="sourceLineNo">282</span> this,
regionNode.getProcedure());<a name="line.282"></a>
+<span class="sourceLineNo">283</span> LOG.warn(msg + " " + this + "; " +
regionNode.toShortString());<a name="line.283"></a>
+<span class="sourceLineNo">284</span>
setAbortFailure(getClass().getSimpleName(), msg);<a name="line.284"></a>
+<span class="sourceLineNo">285</span> return null;<a name="line.285"></a>
+<span class="sourceLineNo">286</span> }<a name="line.286"></a>
+<span class="sourceLineNo">287</span> try {<a name="line.287"></a>
+<span class="sourceLineNo">288</span> boolean retry;<a
name="line.288"></a>
+<span class="sourceLineNo">289</span> do {<a name="line.289"></a>
+<span class="sourceLineNo">290</span> retry = false;<a
name="line.290"></a>
+<span class="sourceLineNo">291</span> switch (transitionState) {<a
name="line.291"></a>
+<span class="sourceLineNo">292</span> case REGION_TRANSITION_QUEUE:<a
name="line.292"></a>
+<span class="sourceLineNo">293</span> // 1. push into the AM queue
for balancer policy<a name="line.293"></a>
+<span class="sourceLineNo">294</span> if (!startTransition(env,
regionNode)) {<a name="line.294"></a>
+<span class="sourceLineNo">295</span> // The operation figured it
is done or it aborted; check getException()<a name="line.295"></a>
+<span class="sourceLineNo">296</span>
am.removeRegionInTransition(getRegionState(env), this);<a name="line.296"></a>
+<span class="sourceLineNo">297</span> return null;<a
name="line.297"></a>
+<span class="sourceLineNo">298</span> }<a name="line.298"></a>
+<span class="sourceLineNo">299</span> transitionState =
RegionTransitionState.REGION_TRANSITION_DISPATCH;<a name="line.299"></a>
+<span class="sourceLineNo">300</span> if
(env.getProcedureScheduler().waitEvent(regionNode.getProcedureEvent(), this))
{<a name="line.300"></a>
+<span class="sourceLineNo">301</span> // Why this suspend?
Because we want to ensure Store happens before proceed?<a name="line.301"></a>
+<span class="sourceLineNo">302</span> throw new
ProcedureSuspendedException();<a name="line.302"></a>
+<span class="sourceLineNo">303</span> }<a name="line.303"></a>
+<span class="sourceLineNo">304</span> break;<a name="line.304"></a>
+<span class="sourceLineNo">305</span><a name="line.305"></a>
+<span class="sourceLineNo">306</span> case
REGION_TRANSITION_DISPATCH:<a name="line.306"></a>
+<span class="sourceLineNo">307</span> // 2. send the request to the
target server<a name="line.307"></a>
+<span class="sourceLineNo">308</span> if (!updateTransition(env,
regionNode)) {<a name="line.308"></a>
+<span class="sourceLineNo">309</span> // The operation figured it
is done or it aborted; check getException()<a name="line.309"></a>
+<span class="sourceLineNo">310</span>
am.removeRegionInTransition(regionNode, this);<a name="line.310"></a>
+<span class="sourceLineNo">311</span> return null;<a
name="line.311"></a>
+<span class="sourceLineNo">312</span> }<a name="line.312"></a>
+<span class="sourceLineNo">313</span> if (transitionState !=
RegionTransitionState.REGION_TRANSITION_DISPATCH) {<a name="line.313"></a>
+<span class="sourceLineNo">314</span> retry = true;<a
name="line.314"></a>
+<span class="sourceLineNo">315</span> break;<a
name="line.315"></a>
+<span class="sourceLineNo">316</span> }<a name="line.316"></a>
+<span class="sourceLineNo">317</span> if
(env.getProcedureScheduler().waitEvent(regionNode.getProcedureEvent(), this))
{<a name="line.317"></a>
+<span class="sourceLineNo">318</span> throw new
ProcedureSuspendedException();<a name="line.318"></a>
+<span class="sourceLineNo">319</span> }<a name="line.319"></a>
+<span class="sourceLineNo">320</span> break;<a name="line.320"></a>
+<span class="sourceLineNo">321</span><a name="line.321"></a>
+<span class="sourceLineNo">322</span> case
REGION_TRANSITION_FINISH:<a name="line.322"></a>
+<span class="sourceLineNo">323</span> // 3. wait assignment
response. completion/failure<a name="line.323"></a>
+<span class="sourceLineNo">324</span> finishTransition(env,
regionNode);<a name="line.324"></a>
+<span class="sourceLineNo">325</span>
am.removeRegionInTransition(regionNode, this);<a name="line.325"></a>
+<span class="sourceLineNo">326</span> return null;<a
name="line.326"></a>
+<span class="sourceLineNo">327</span> }<a name="line.327"></a>
+<span class="sourceLineNo">328</span> } while (retry);<a
name="line.328"></a>
+<span class="sourceLineNo">329</span> } catch (IOException e) {<a
name="line.329"></a>
+<span class="sourceLineNo">330</span> LOG.warn("Retryable error trying to
transition: " +<a name="line.330"></a>
+<span class="sourceLineNo">331</span> this + "; " +
regionNode.toShortString(), e);<a name="line.331"></a>
+<span class="sourceLineNo">332</span> }<a name="line.332"></a>
+<span class="sourceLineNo">333</span><a name="line.333"></a>
+<span class="sourceLineNo">334</span> return new Procedure[] {this};<a
name="line.334"></a>
+<span class="sourceLineNo">335</span> }<a name="line.335"></a>
+<span class="sourceLineNo">336</span><a name="line.336"></a>
+<span class="sourceLineNo">337</span> @Override<a name="line.337"></a>
+<span class="sourceLineNo">338</span> protected void rollback(final
MasterProcedureEnv env) {<a name="line.338"></a>
+<span class="sourceLineNo">339</span> if
(isRollbackSupported(transitionState)) {<a name="line.339"></a>
+<span class="sourceLineNo">340</span> // Nothing done up to this point.
abort safely.<a name="line.340"></a>
+<span class="sourceLineNo">341</span> // This should happen when
something like disableTable() is triggered.<a name="line.341"></a>
+<span class="sourceLineNo">342</span>
env.getAssignmentManager().removeRegionInTransition(getRegionState(env),
this);<a name="line.342"></a>
+<span class="sourceLineNo">343</span> return;<a name="line.343"></a>
+<span class="sourceLineNo">344</span> }<a name="line.344"></a>
+<span class="sourceLineNo">345</span><a name="line.345"></a>
+<span class="sourceLineNo">346</span> // There is no rollback for
assignment unless we cancel the operation by<a name="line.346"></a>
+<span class="sourceLineNo">347</span> // dropping/disabling the table.<a
name="line.347"></a>
+<span class="sourceLineNo">348</span> throw new
UnsupportedOperationException("Unhandled state " + transitionState +<a
name="line.348"></a>
+<span class="sourceLineNo">349</span> "; there is no rollback for
assignment unless we cancel the operation by " +<a name="line.349"></a>
+<span class="sourceLineNo">350</span> "dropping/disabling the
table");<a name="line.350"></a>
+<span class="sourceLineNo">351</span> }<a name="line.351"></a>
+<span class="sourceLineNo">352</span><a name="line.352"></a>
+<span class="sourceLineNo">353</span> protected abstract boolean
isRollbackSupported(final RegionTransitionState state);<a name="line.353"></a>
+<span class="sourceLineNo">354</span><a name="line.354"></a>
+<span class="sourceLineNo">355</span> @Override<a name="line.355"></a>
+<span class="sourceLineNo">356</span> protected boolean abort(final
MasterProcedureEnv env) {<a name="line.356"></a>
+<span class="sourceLineNo">357</span> if
(isRollbackSupported(transitionState)) {<a name="line.357"></a>
+<span class="sourceLineNo">358</span> aborted.set(true);<a
name="line.358"></a>
+<span class="sourceLineNo">359</span> return true;<a name="line.359"></a>
+<span class="sourceLineNo">360</span> }<a name="line.360"></a>
+<span class="sourceLineNo">361</span> return false;<a name="line.361"></a>
+<span class="sourceLineNo">362</span> }<a name="line.362"></a>
+<span class="sourceLineNo">363</span><a name="line.363"></a>
+<span class="sourceLineNo">364</span> @Override<a name="line.364"></a>
+<span class="sourceLineNo">365</span> protected LockState acquireLock(final
MasterProcedureEnv env) {<a name="line.365"></a>
+<span class="sourceLineNo">366</span> // Unless we are assigning meta, wait
for meta to be available and loaded.<a name="line.366"></a>
+<span class="sourceLineNo">367</span> if (!isMeta() &&
(env.waitFailoverCleanup(this) ||<a name="line.367"></a>
+<span class="sourceLineNo">368</span>
env.getAssignmentManager().waitMetaInitialized(this, getRegionInfo()))) {<a
name="line.368"></a>
+<span class="sourceLineNo">369</span> return LockState.LOCK_EVENT_WAIT;<a
name="line.369"></a>
+<span class="sourceLineNo">370</span> }<a name="line.370"></a>
+<span class="sourceLineNo">371</span><a name="line.371"></a>
+<span class="sourceLineNo">372</span> // TODO: Revisit this and move it to
the executor<a name="line.372"></a>
+<span class="sourceLineNo">373</span> if
(env.getProcedureScheduler().waitRegion(this, getRegionInfo())) {<a
name="line.373"></a>
+<span class="sourceLineNo">374</span> try {<a name="line.374"></a>
+<span class="sourceLineNo">375</span>
LOG.debug(LockState.LOCK_EVENT_WAIT + " pid=" + getProcId() + " " +<a
name="line.375"></a>
+<span class="sourceLineNo">376</span>
env.getProcedureScheduler().dumpLocks());<a name="line.376"></a>
+<span class="sourceLineNo">377</span> } catch (IOException e) {<a
name="line.377"></a>
+<span class="sourceLineNo">378</span> // TODO Auto-generated catch
block<a name="line.378"></a>
+<span class="sourceLineNo">379</span> e.printStackTrace();<a
name="line.379"></a>
+<span class="sourceLineNo">380</span> }<a name="line.380"></a>
+<span class="sourceLineNo">381</span> return LockState.LOCK_EVENT_WAIT;<a
name="line.381"></a>
+<span class="sourceLineNo">382</span> }<a name="line.382"></a>
+<span class="sourceLineNo">383</span> this.lock = true;<a
name="line.383"></a>
+<span class="sourceLineNo">384</span> return LockState.LOCK_ACQUIRED;<a
name="line.384"></a>
<span class="sourceLineNo">385</span> }<a name="line.385"></a>
<span class="sourceLineNo">386</span><a name="line.386"></a>
<span class="sourceLineNo">387</span> @Override<a name="line.387"></a>
-<span class="sourceLineNo">388</span> protected boolean holdLock(final
MasterProcedureEnv env) {<a name="line.388"></a>
-<span class="sourceLineNo">389</span> return true;<a name="line.389"></a>
-<span class="sourceLineNo">390</span> }<a name="line.390"></a>
-<span class="sourceLineNo">391</span><a name="line.391"></a>
-<span class="sourceLineNo">392</span> @Override<a name="line.392"></a>
-<span class="sourceLineNo">393</span> protected boolean hasLock(final
MasterProcedureEnv env) {<a name="line.393"></a>
-<span class="sourceLineNo">394</span> return lock;<a name="line.394"></a>
-<span class="sourceLineNo">395</span> }<a name="line.395"></a>
-<span class="sourceLineNo">396</span><a name="line.396"></a>
-<span class="sourceLineNo">397</span> @Override<a name="line.397"></a>
-<span class="sourceLineNo">398</span> protected boolean
shouldWaitClientAck(MasterProcedureEnv env) {<a name="line.398"></a>
-<span class="sourceLineNo">399</span> // The operation is triggered
internally on the server<a name="line.399"></a>
-<span class="sourceLineNo">400</span> // the client does not know about
this procedure.<a name="line.400"></a>
-<span class="sourceLineNo">401</span> return false;<a name="line.401"></a>
-<span class="sourceLineNo">402</span> }<a name="line.402"></a>
-<span class="sourceLineNo">403</span><a name="line.403"></a>
-<span class="sourceLineNo">404</span> /**<a name="line.404"></a>
-<span class="sourceLineNo">405</span> * Used by ServerCrashProcedure to see
if this Assign/Unassign needs processing.<a name="line.405"></a>
-<span class="sourceLineNo">406</span> * @return ServerName the Assign or
Unassign is going against.<a name="line.406"></a>
-<span class="sourceLineNo">407</span> */<a name="line.407"></a>
-<span class="sourceLineNo">408</span> public abstract ServerName
getServer(final MasterProcedureEnv env);<a name="line.408"></a>
-<span class="sourceLineNo">409</span>}<a name="line.409"></a>
+<span class="sourceLineNo">388</span> protected void releaseLock(final
MasterProcedureEnv env) {<a name="line.388"></a>
+<span class="sourceLineNo">389</span>
env.getProcedureScheduler().wakeRegion(this, getRegionInfo());<a
name="line.389"></a>
+<span class="sourceLineNo">390</span> lock = false;<a name="line.390"></a>
+<span class="sourceLineNo">391</span> }<a name="line.391"></a>
+<span class="sourceLineNo">392</span><a name="line.392"></a>
+<span class="sourceLineNo">393</span> @Override<a name="line.393"></a>
+<span class="sourceLineNo">394</span> protected boolean holdLock(final
MasterProcedureEnv env) {<a name="line.394"></a>
+<span class="sourceLineNo">395</span> return true;<a name="line.395"></a>
+<span class="sourceLineNo">396</span> }<a name="line.396"></a>
+<span class="sourceLineNo">397</span><a name="line.397"></a>
+<span class="sourceLineNo">398</span> @Override<a name="line.398"></a>
+<span class="sourceLineNo">399</span> protected boolean hasLock(final
MasterProcedureEnv env) {<a name="line.399"></a>
+<span class="sourceLineNo">400</span> return lock;<a name="line.400"></a>
+<span class="sourceLineNo">401</span> }<a name="line.401"></a>
+<span class="sourceLineNo">402</span><a name="line.402"></a>
+<span class="sourceLineNo">403</span> @Override<a name="line.403"></a>
+<span class="sourceLineNo">404</span> protected boolean
shouldWaitClientAck(MasterProcedureEnv env) {<a name="line.404"></a>
+<span class="sourceLineNo">405</span> // The operation is triggered
internally on the server<a name="line.405"></a>
+<span class="sourceLineNo">406</span> // the client does not know about
this procedure.<a name="line.406"></a>
+<span class="sourceLineNo">407</span> return false;<a name="line.407"></a>
+<span class="sourceLineNo">408</span> }<a name="line.408"></a>
+<span class="sourceLineNo">409</span><a name="line.409"></a>
+<span class="sourceLineNo">410</span> /**<a name="line.410"></a>
+<span class="sourceLineNo">411</span> * Used by ServerCrashProcedure to see
if this Assign/Unassign needs processing.<a name="line.411"></a>
+<span class="sourceLineNo">412</span> * @return ServerName the Assign or
Unassign is going against.<a name="line.412"></a>
+<span class="sourceLineNo">413</span> */<a name="line.413"></a>
+<span class="sourceLineNo">414</span> public abstract ServerName
getServer(final MasterProcedureEnv env);<a name="line.414"></a>
+<span class="sourceLineNo">415</span>}<a name="line.415"></a>
