[22/51] [partial] hbase-site git commit: Published site at df829ea7d1b4d2ef745e29d2b25b12966000eeb2.

[misty]

http://git-wip-us.apache.org/repos/asf/hbase-site/blob/40ef21e4/devapidocs/src-html/org/apache/hadoop/hbase/tool/Canary.RegionServerMonitor.html
----------------------------------------------------------------------
diff --git 
a/devapidocs/src-html/org/apache/hadoop/hbase/tool/Canary.RegionServerMonitor.html
 
b/devapidocs/src-html/org/apache/hadoop/hbase/tool/Canary.RegionServerMonitor.html
index 1830775..d3abe39 100644
--- 
a/devapidocs/src-html/org/apache/hadoop/hbase/tool/Canary.RegionServerMonitor.html
+++ 
b/devapidocs/src-html/org/apache/hadoop/hbase/tool/Canary.RegionServerMonitor.html
@@ -84,1126 +84,1172 @@
 <span class="sourceLineNo">076</span>import 
org.apache.hadoop.hbase.util.Pair;<a name="line.76"></a>
 <span class="sourceLineNo">077</span>import 
org.apache.hadoop.hbase.util.ReflectionUtils;<a name="line.77"></a>
 <span class="sourceLineNo">078</span>import 
org.apache.hadoop.hbase.util.RegionSplitter;<a name="line.78"></a>
-<span class="sourceLineNo">079</span>import org.apache.hadoop.util.Tool;<a 
name="line.79"></a>
-<span class="sourceLineNo">080</span>import 
org.apache.hadoop.util.ToolRunner;<a name="line.80"></a>
-<span class="sourceLineNo">081</span><a name="line.81"></a>
-<span class="sourceLineNo">082</span>/**<a name="line.82"></a>
-<span class="sourceLineNo">083</span> * HBase Canary Tool, that that can be 
used to do<a name="line.83"></a>
-<span class="sourceLineNo">084</span> * "canary monitoring" of a running HBase 
cluster.<a name="line.84"></a>
-<span class="sourceLineNo">085</span> *<a name="line.85"></a>
-<span class="sourceLineNo">086</span> * Here are two modes<a 
name="line.86"></a>
-<span class="sourceLineNo">087</span> * 1. region mode - Foreach region tries 
to get one row per column family<a name="line.87"></a>
-<span class="sourceLineNo">088</span> * and outputs some information about 
failure or latency.<a name="line.88"></a>
-<span class="sourceLineNo">089</span> *<a name="line.89"></a>
-<span class="sourceLineNo">090</span> * 2. regionserver mode - Foreach 
regionserver tries to get one row from one table<a name="line.90"></a>
-<span class="sourceLineNo">091</span> * selected randomly and outputs some 
information about failure or latency.<a name="line.91"></a>
-<span class="sourceLineNo">092</span> */<a name="line.92"></a>
-<span class="sourceLineNo">093</span>public final class Canary implements Tool 
{<a name="line.93"></a>
-<span class="sourceLineNo">094</span>  // Sink interface used by the canary to 
outputs information<a name="line.94"></a>
-<span class="sourceLineNo">095</span>  public interface Sink {<a 
name="line.95"></a>
-<span class="sourceLineNo">096</span>    public void 
publishReadFailure(HRegionInfo region, Exception e);<a name="line.96"></a>
-<span class="sourceLineNo">097</span>    public void 
publishReadFailure(HRegionInfo region, HColumnDescriptor column, Exception 
e);<a name="line.97"></a>
-<span class="sourceLineNo">098</span>    public void 
publishReadTiming(HRegionInfo region, HColumnDescriptor column, long msTime);<a 
name="line.98"></a>
-<span class="sourceLineNo">099</span>    public void 
publishWriteFailure(HRegionInfo region, Exception e);<a name="line.99"></a>
-<span class="sourceLineNo">100</span>    public void 
publishWriteFailure(HRegionInfo region, HColumnDescriptor column, Exception 
e);<a name="line.100"></a>
-<span class="sourceLineNo">101</span>    public void 
publishWriteTiming(HRegionInfo region, HColumnDescriptor column, long 
msTime);<a name="line.101"></a>
-<span class="sourceLineNo">102</span>  }<a name="line.102"></a>
-<span class="sourceLineNo">103</span>  // new extended sink for output 
regionserver mode info<a name="line.103"></a>
-<span class="sourceLineNo">104</span>  // do not change the Sink interface 
directly due to maintaining the API<a name="line.104"></a>
-<span class="sourceLineNo">105</span>  public interface ExtendedSink extends 
Sink {<a name="line.105"></a>
-<span class="sourceLineNo">106</span>    public void publishReadFailure(String 
table, String server);<a name="line.106"></a>
-<span class="sourceLineNo">107</span>    public void publishReadTiming(String 
table, String server, long msTime);<a name="line.107"></a>
-<span class="sourceLineNo">108</span>  }<a name="line.108"></a>
-<span class="sourceLineNo">109</span><a name="line.109"></a>
-<span class="sourceLineNo">110</span>  // Simple implementation of canary sink 
that allows to plot on<a name="line.110"></a>
-<span class="sourceLineNo">111</span>  // file or standard output timings or 
failures.<a name="line.111"></a>
-<span class="sourceLineNo">112</span>  public static class StdOutSink 
implements Sink {<a name="line.112"></a>
-<span class="sourceLineNo">113</span>    @Override<a name="line.113"></a>
-<span class="sourceLineNo">114</span>    public void 
publishReadFailure(HRegionInfo region, Exception e) {<a name="line.114"></a>
-<span class="sourceLineNo">115</span>      LOG.error(String.format("read from 
region %s failed", region.getRegionNameAsString()), e);<a name="line.115"></a>
-<span class="sourceLineNo">116</span>    }<a name="line.116"></a>
-<span class="sourceLineNo">117</span><a name="line.117"></a>
-<span class="sourceLineNo">118</span>    @Override<a name="line.118"></a>
-<span class="sourceLineNo">119</span>    public void 
publishReadFailure(HRegionInfo region, HColumnDescriptor column, Exception e) 
{<a name="line.119"></a>
-<span class="sourceLineNo">120</span>      LOG.error(String.format("read from 
region %s column family %s failed",<a name="line.120"></a>
-<span class="sourceLineNo">121</span>                
region.getRegionNameAsString(), column.getNameAsString()), e);<a 
name="line.121"></a>
+<span class="sourceLineNo">079</span>import 
org.apache.hadoop.util.GenericOptionsParser;<a name="line.79"></a>
+<span class="sourceLineNo">080</span>import org.apache.hadoop.util.Tool;<a 
name="line.80"></a>
+<span class="sourceLineNo">081</span>import 
org.apache.hadoop.util.ToolRunner;<a name="line.81"></a>
+<span class="sourceLineNo">082</span><a name="line.82"></a>
+<span class="sourceLineNo">083</span>/**<a name="line.83"></a>
+<span class="sourceLineNo">084</span> * HBase Canary Tool, that that can be 
used to do<a name="line.84"></a>
+<span class="sourceLineNo">085</span> * "canary monitoring" of a running HBase 
cluster.<a name="line.85"></a>
+<span class="sourceLineNo">086</span> *<a name="line.86"></a>
+<span class="sourceLineNo">087</span> * Here are two modes<a 
name="line.87"></a>
+<span class="sourceLineNo">088</span> * 1. region mode - Foreach region tries 
to get one row per column family<a name="line.88"></a>
+<span class="sourceLineNo">089</span> * and outputs some information about 
failure or latency.<a name="line.89"></a>
+<span class="sourceLineNo">090</span> *<a name="line.90"></a>
+<span class="sourceLineNo">091</span> * 2. regionserver mode - Foreach 
regionserver tries to get one row from one table<a name="line.91"></a>
+<span class="sourceLineNo">092</span> * selected randomly and outputs some 
information about failure or latency.<a name="line.92"></a>
+<span class="sourceLineNo">093</span> */<a name="line.93"></a>
+<span class="sourceLineNo">094</span>public final class Canary implements Tool 
{<a name="line.94"></a>
+<span class="sourceLineNo">095</span>  // Sink interface used by the canary to 
outputs information<a name="line.95"></a>
+<span class="sourceLineNo">096</span>  public interface Sink {<a 
name="line.96"></a>
+<span class="sourceLineNo">097</span>    public long getReadFailureCount();<a 
name="line.97"></a>
+<span class="sourceLineNo">098</span>    public void 
publishReadFailure(HRegionInfo region, Exception e);<a name="line.98"></a>
+<span class="sourceLineNo">099</span>    public void 
publishReadFailure(HRegionInfo region, HColumnDescriptor column, Exception 
e);<a name="line.99"></a>
+<span class="sourceLineNo">100</span>    public void 
publishReadTiming(HRegionInfo region, HColumnDescriptor column, long msTime);<a 
name="line.100"></a>
+<span class="sourceLineNo">101</span>    public long getWriteFailureCount();<a 
name="line.101"></a>
+<span class="sourceLineNo">102</span>    public void 
publishWriteFailure(HRegionInfo region, Exception e);<a name="line.102"></a>
+<span class="sourceLineNo">103</span>    public void 
publishWriteFailure(HRegionInfo region, HColumnDescriptor column, Exception 
e);<a name="line.103"></a>
+<span class="sourceLineNo">104</span>    public void 
publishWriteTiming(HRegionInfo region, HColumnDescriptor column, long 
msTime);<a name="line.104"></a>
+<span class="sourceLineNo">105</span>  }<a name="line.105"></a>
+<span class="sourceLineNo">106</span>  // new extended sink for output 
regionserver mode info<a name="line.106"></a>
+<span class="sourceLineNo">107</span>  // do not change the Sink interface 
directly due to maintaining the API<a name="line.107"></a>
+<span class="sourceLineNo">108</span>  public interface ExtendedSink extends 
Sink {<a name="line.108"></a>
+<span class="sourceLineNo">109</span>    public void publishReadFailure(String 
table, String server);<a name="line.109"></a>
+<span class="sourceLineNo">110</span>    public void publishReadTiming(String 
table, String server, long msTime);<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>  // Simple implementation of canary sink 
that allows to plot on<a name="line.113"></a>
+<span class="sourceLineNo">114</span>  // file or standard output timings or 
failures.<a name="line.114"></a>
+<span class="sourceLineNo">115</span>  public static class StdOutSink 
implements Sink {<a name="line.115"></a>
+<span class="sourceLineNo">116</span>    protected AtomicLong readFailureCount 
= new AtomicLong(0),<a name="line.116"></a>
+<span class="sourceLineNo">117</span>        writeFailureCount = new 
AtomicLong(0);<a name="line.117"></a>
+<span class="sourceLineNo">118</span><a name="line.118"></a>
+<span class="sourceLineNo">119</span>    @Override<a name="line.119"></a>
+<span class="sourceLineNo">120</span>    public long getReadFailureCount() {<a 
name="line.120"></a>
+<span class="sourceLineNo">121</span>      return readFailureCount.get();<a 
name="line.121"></a>
 <span class="sourceLineNo">122</span>    }<a name="line.122"></a>
 <span class="sourceLineNo">123</span><a name="line.123"></a>
 <span class="sourceLineNo">124</span>    @Override<a name="line.124"></a>
-<span class="sourceLineNo">125</span>    public void 
publishReadTiming(HRegionInfo region, HColumnDescriptor column, long msTime) 
{<a name="line.125"></a>
-<span class="sourceLineNo">126</span>      LOG.info(String.format("read from 
region %s column family %s in %dms",<a name="line.126"></a>
-<span class="sourceLineNo">127</span>               
region.getRegionNameAsString(), column.getNameAsString(), msTime));<a 
name="line.127"></a>
+<span class="sourceLineNo">125</span>    public void 
publishReadFailure(HRegionInfo region, Exception e) {<a name="line.125"></a>
+<span class="sourceLineNo">126</span>      
readFailureCount.incrementAndGet();<a name="line.126"></a>
+<span class="sourceLineNo">127</span>      LOG.error(String.format("read from 
region %s failed", region.getRegionNameAsString()), e);<a name="line.127"></a>
 <span class="sourceLineNo">128</span>    }<a name="line.128"></a>
 <span class="sourceLineNo">129</span><a name="line.129"></a>
 <span class="sourceLineNo">130</span>    @Override<a name="line.130"></a>
-<span class="sourceLineNo">131</span>    public void 
publishWriteFailure(HRegionInfo region, Exception e) {<a name="line.131"></a>
-<span class="sourceLineNo">132</span>      LOG.error(String.format("write to 
region %s failed", region.getRegionNameAsString()), e);<a name="line.132"></a>
-<span class="sourceLineNo">133</span>    }<a name="line.133"></a>
-<span class="sourceLineNo">134</span><a name="line.134"></a>
-<span class="sourceLineNo">135</span>    @Override<a name="line.135"></a>
-<span class="sourceLineNo">136</span>    public void 
publishWriteFailure(HRegionInfo region, HColumnDescriptor column, Exception e) 
{<a name="line.136"></a>
-<span class="sourceLineNo">137</span>      LOG.error(String.format("write to 
region %s column family %s failed",<a name="line.137"></a>
-<span class="sourceLineNo">138</span>        region.getRegionNameAsString(), 
column.getNameAsString()), e);<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>    @Override<a name="line.141"></a>
-<span class="sourceLineNo">142</span>    public void 
publishWriteTiming(HRegionInfo region, HColumnDescriptor column, long msTime) 
{<a name="line.142"></a>
-<span class="sourceLineNo">143</span>      LOG.info(String.format("write to 
region %s column family %s in %dms",<a name="line.143"></a>
-<span class="sourceLineNo">144</span>        region.getRegionNameAsString(), 
column.getNameAsString(), msTime));<a name="line.144"></a>
-<span class="sourceLineNo">145</span>    }<a name="line.145"></a>
-<span class="sourceLineNo">146</span>  }<a name="line.146"></a>
-<span class="sourceLineNo">147</span>  // a ExtendedSink implementation<a 
name="line.147"></a>
-<span class="sourceLineNo">148</span>  public static class 
RegionServerStdOutSink extends StdOutSink implements ExtendedSink {<a 
name="line.148"></a>
-<span class="sourceLineNo">149</span><a name="line.149"></a>
-<span class="sourceLineNo">150</span>    @Override<a name="line.150"></a>
-<span class="sourceLineNo">151</span>    public void publishReadFailure(String 
table, String server) {<a name="line.151"></a>
-<span class="sourceLineNo">152</span>      LOG.error(String.format("Read from 
table:%s on region server:%s", table, server));<a name="line.152"></a>
-<span class="sourceLineNo">153</span>    }<a name="line.153"></a>
-<span class="sourceLineNo">154</span><a name="line.154"></a>
-<span class="sourceLineNo">155</span>    @Override<a name="line.155"></a>
-<span class="sourceLineNo">156</span>    public void publishReadTiming(String 
table, String server, long msTime) {<a name="line.156"></a>
-<span class="sourceLineNo">157</span>      LOG.info(String.format("Read from 
table:%s on region server:%s in %dms",<a name="line.157"></a>
-<span class="sourceLineNo">158</span>          table, server, msTime));<a 
name="line.158"></a>
+<span class="sourceLineNo">131</span>    public void 
publishReadFailure(HRegionInfo region, HColumnDescriptor column, Exception e) 
{<a name="line.131"></a>
+<span class="sourceLineNo">132</span>      
readFailureCount.incrementAndGet();<a name="line.132"></a>
+<span class="sourceLineNo">133</span>      LOG.error(String.format("read from 
region %s column family %s failed",<a name="line.133"></a>
+<span class="sourceLineNo">134</span>                
region.getRegionNameAsString(), column.getNameAsString()), e);<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>    @Override<a name="line.137"></a>
+<span class="sourceLineNo">138</span>    public void 
publishReadTiming(HRegionInfo region, HColumnDescriptor column, long msTime) 
{<a name="line.138"></a>
+<span class="sourceLineNo">139</span>      LOG.info(String.format("read from 
region %s column family %s in %dms",<a name="line.139"></a>
+<span class="sourceLineNo">140</span>               
region.getRegionNameAsString(), column.getNameAsString(), msTime));<a 
name="line.140"></a>
+<span class="sourceLineNo">141</span>    }<a name="line.141"></a>
+<span class="sourceLineNo">142</span><a name="line.142"></a>
+<span class="sourceLineNo">143</span>    @Override<a name="line.143"></a>
+<span class="sourceLineNo">144</span>    public long getWriteFailureCount() 
{<a name="line.144"></a>
+<span class="sourceLineNo">145</span>      return writeFailureCount.get();<a 
name="line.145"></a>
+<span class="sourceLineNo">146</span>    }<a name="line.146"></a>
+<span class="sourceLineNo">147</span><a name="line.147"></a>
+<span class="sourceLineNo">148</span>    @Override<a name="line.148"></a>
+<span class="sourceLineNo">149</span>    public void 
publishWriteFailure(HRegionInfo region, Exception e) {<a name="line.149"></a>
+<span class="sourceLineNo">150</span>      
writeFailureCount.incrementAndGet();<a name="line.150"></a>
+<span class="sourceLineNo">151</span>      LOG.error(String.format("write to 
region %s failed", region.getRegionNameAsString()), e);<a name="line.151"></a>
+<span class="sourceLineNo">152</span>    }<a name="line.152"></a>
+<span class="sourceLineNo">153</span><a name="line.153"></a>
+<span class="sourceLineNo">154</span>    @Override<a name="line.154"></a>
+<span class="sourceLineNo">155</span>    public void 
publishWriteFailure(HRegionInfo region, HColumnDescriptor column, Exception e) 
{<a name="line.155"></a>
+<span class="sourceLineNo">156</span>      
writeFailureCount.incrementAndGet();<a name="line.156"></a>
+<span class="sourceLineNo">157</span>      LOG.error(String.format("write to 
region %s column family %s failed",<a name="line.157"></a>
+<span class="sourceLineNo">158</span>        region.getRegionNameAsString(), 
column.getNameAsString()), e);<a name="line.158"></a>
 <span class="sourceLineNo">159</span>    }<a name="line.159"></a>
-<span class="sourceLineNo">160</span>  }<a name="line.160"></a>
-<span class="sourceLineNo">161</span><a name="line.161"></a>
-<span class="sourceLineNo">162</span>  /**<a name="line.162"></a>
-<span class="sourceLineNo">163</span>   * For each column family of the region 
tries to get one row and outputs the latency, or the<a name="line.163"></a>
-<span class="sourceLineNo">164</span>   * failure.<a name="line.164"></a>
-<span class="sourceLineNo">165</span>   */<a name="line.165"></a>
-<span class="sourceLineNo">166</span>  static class RegionTask implements 
Callable&lt;Void&gt; {<a name="line.166"></a>
-<span class="sourceLineNo">167</span>    public enum TaskType{<a 
name="line.167"></a>
-<span class="sourceLineNo">168</span>      READ, WRITE<a name="line.168"></a>
-<span class="sourceLineNo">169</span>    }<a name="line.169"></a>
-<span class="sourceLineNo">170</span>    private Connection connection;<a 
name="line.170"></a>
-<span class="sourceLineNo">171</span>    private HRegionInfo region;<a 
name="line.171"></a>
-<span class="sourceLineNo">172</span>    private Sink sink;<a 
name="line.172"></a>
-<span class="sourceLineNo">173</span>    private TaskType taskType;<a 
name="line.173"></a>
-<span class="sourceLineNo">174</span><a name="line.174"></a>
-<span class="sourceLineNo">175</span>    RegionTask(Connection connection, 
HRegionInfo region, Sink sink, TaskType taskType) {<a name="line.175"></a>
-<span class="sourceLineNo">176</span>      this.connection = connection;<a 
name="line.176"></a>
-<span class="sourceLineNo">177</span>      this.region = region;<a 
name="line.177"></a>
-<span class="sourceLineNo">178</span>      this.sink = sink;<a 
name="line.178"></a>
-<span class="sourceLineNo">179</span>      this.taskType = taskType;<a 
name="line.179"></a>
+<span class="sourceLineNo">160</span><a name="line.160"></a>
+<span class="sourceLineNo">161</span>    @Override<a name="line.161"></a>
+<span class="sourceLineNo">162</span>    public void 
publishWriteTiming(HRegionInfo region, HColumnDescriptor column, long msTime) 
{<a name="line.162"></a>
+<span class="sourceLineNo">163</span>      LOG.info(String.format("write to 
region %s column family %s in %dms",<a name="line.163"></a>
+<span class="sourceLineNo">164</span>        region.getRegionNameAsString(), 
column.getNameAsString(), msTime));<a name="line.164"></a>
+<span class="sourceLineNo">165</span>    }<a name="line.165"></a>
+<span class="sourceLineNo">166</span>  }<a name="line.166"></a>
+<span class="sourceLineNo">167</span>  // a ExtendedSink implementation<a 
name="line.167"></a>
+<span class="sourceLineNo">168</span>  public static class 
RegionServerStdOutSink extends StdOutSink implements ExtendedSink {<a 
name="line.168"></a>
+<span class="sourceLineNo">169</span><a name="line.169"></a>
+<span class="sourceLineNo">170</span>    @Override<a name="line.170"></a>
+<span class="sourceLineNo">171</span>    public void publishReadFailure(String 
table, String server) {<a name="line.171"></a>
+<span class="sourceLineNo">172</span>      
readFailureCount.incrementAndGet();<a name="line.172"></a>
+<span class="sourceLineNo">173</span>      LOG.error(String.format("Read from 
table:%s on region server:%s", table, server));<a name="line.173"></a>
+<span class="sourceLineNo">174</span>    }<a name="line.174"></a>
+<span class="sourceLineNo">175</span><a name="line.175"></a>
+<span class="sourceLineNo">176</span>    @Override<a name="line.176"></a>
+<span class="sourceLineNo">177</span>    public void publishReadTiming(String 
table, String server, long msTime) {<a name="line.177"></a>
+<span class="sourceLineNo">178</span>      LOG.info(String.format("Read from 
table:%s on region server:%s in %dms",<a name="line.178"></a>
+<span class="sourceLineNo">179</span>          table, server, msTime));<a 
name="line.179"></a>
 <span class="sourceLineNo">180</span>    }<a name="line.180"></a>
-<span class="sourceLineNo">181</span><a name="line.181"></a>
-<span class="sourceLineNo">182</span>    @Override<a name="line.182"></a>
-<span class="sourceLineNo">183</span>    public Void call() {<a 
name="line.183"></a>
-<span class="sourceLineNo">184</span>      switch (taskType) {<a 
name="line.184"></a>
-<span class="sourceLineNo">185</span>      case READ:<a name="line.185"></a>
-<span class="sourceLineNo">186</span>        return read();<a 
name="line.186"></a>
-<span class="sourceLineNo">187</span>      case WRITE:<a name="line.187"></a>
-<span class="sourceLineNo">188</span>        return write();<a 
name="line.188"></a>
-<span class="sourceLineNo">189</span>      default:<a name="line.189"></a>
-<span class="sourceLineNo">190</span>        return read();<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>
-<span class="sourceLineNo">193</span><a name="line.193"></a>
-<span class="sourceLineNo">194</span>    public Void read() {<a 
name="line.194"></a>
-<span class="sourceLineNo">195</span>      Table table = null;<a 
name="line.195"></a>
-<span class="sourceLineNo">196</span>      HTableDescriptor tableDesc = 
null;<a name="line.196"></a>
-<span class="sourceLineNo">197</span>      try {<a name="line.197"></a>
-<span class="sourceLineNo">198</span>        if (LOG.isDebugEnabled()) {<a 
name="line.198"></a>
-<span class="sourceLineNo">199</span>          
LOG.debug(String.format("reading table descriptor for table %s",<a 
name="line.199"></a>
-<span class="sourceLineNo">200</span>            region.getTable()));<a 
name="line.200"></a>
-<span class="sourceLineNo">201</span>        }<a name="line.201"></a>
-<span class="sourceLineNo">202</span>        table = 
connection.getTable(region.getTable());<a name="line.202"></a>
-<span class="sourceLineNo">203</span>        tableDesc = 
table.getTableDescriptor();<a name="line.203"></a>
-<span class="sourceLineNo">204</span>      } catch (IOException e) {<a 
name="line.204"></a>
-<span class="sourceLineNo">205</span>        LOG.debug("sniffRegion failed", 
e);<a name="line.205"></a>
-<span class="sourceLineNo">206</span>        sink.publishReadFailure(region, 
e);<a name="line.206"></a>
-<span class="sourceLineNo">207</span>        if (table != null) {<a 
name="line.207"></a>
-<span class="sourceLineNo">208</span>          try {<a name="line.208"></a>
-<span class="sourceLineNo">209</span>            table.close();<a 
name="line.209"></a>
-<span class="sourceLineNo">210</span>          } catch (IOException ioe) {<a 
name="line.210"></a>
-<span class="sourceLineNo">211</span>            LOG.error("Close table 
failed", e);<a name="line.211"></a>
-<span class="sourceLineNo">212</span>          }<a name="line.212"></a>
-<span class="sourceLineNo">213</span>        }<a name="line.213"></a>
-<span class="sourceLineNo">214</span>        return null;<a 
name="line.214"></a>
-<span class="sourceLineNo">215</span>      }<a name="line.215"></a>
-<span class="sourceLineNo">216</span><a name="line.216"></a>
-<span class="sourceLineNo">217</span>      byte[] startKey = null;<a 
name="line.217"></a>
-<span class="sourceLineNo">218</span>      Get get = null;<a 
name="line.218"></a>
-<span class="sourceLineNo">219</span>      Scan scan = null;<a 
name="line.219"></a>
-<span class="sourceLineNo">220</span>      ResultScanner rs = null;<a 
name="line.220"></a>
-<span class="sourceLineNo">221</span>      StopWatch stopWatch = new 
StopWatch();<a name="line.221"></a>
-<span class="sourceLineNo">222</span>      for (HColumnDescriptor column : 
tableDesc.getColumnFamilies()) {<a name="line.222"></a>
-<span class="sourceLineNo">223</span>        stopWatch.reset();<a 
name="line.223"></a>
-<span class="sourceLineNo">224</span>        startKey = 
region.getStartKey();<a name="line.224"></a>
-<span class="sourceLineNo">225</span>        // Can't do a get on empty start 
row so do a Scan of first element if any instead.<a name="line.225"></a>
-<span class="sourceLineNo">226</span>        if (startKey.length &gt; 0) {<a 
name="line.226"></a>
-<span class="sourceLineNo">227</span>          get = new Get(startKey);<a 
name="line.227"></a>
-<span class="sourceLineNo">228</span>          get.setCacheBlocks(false);<a 
name="line.228"></a>
-<span class="sourceLineNo">229</span>          get.setFilter(new 
FirstKeyOnlyFilter());<a name="line.229"></a>
-<span class="sourceLineNo">230</span>          
get.addFamily(column.getName());<a name="line.230"></a>
-<span class="sourceLineNo">231</span>        } else {<a name="line.231"></a>
-<span class="sourceLineNo">232</span>          scan = new Scan();<a 
name="line.232"></a>
-<span class="sourceLineNo">233</span>          scan.setRaw(true);<a 
name="line.233"></a>
-<span class="sourceLineNo">234</span>          scan.setCaching(1);<a 
name="line.234"></a>
-<span class="sourceLineNo">235</span>          scan.setCacheBlocks(false);<a 
name="line.235"></a>
-<span class="sourceLineNo">236</span>          scan.setFilter(new 
FirstKeyOnlyFilter());<a name="line.236"></a>
-<span class="sourceLineNo">237</span>          
scan.addFamily(column.getName());<a name="line.237"></a>
-<span class="sourceLineNo">238</span>          scan.setMaxResultSize(1L);<a 
name="line.238"></a>
-<span class="sourceLineNo">239</span>          scan.setSmall(true);<a 
name="line.239"></a>
-<span class="sourceLineNo">240</span>        }<a name="line.240"></a>
-<span class="sourceLineNo">241</span><a name="line.241"></a>
-<span class="sourceLineNo">242</span>        if (LOG.isDebugEnabled()) {<a 
name="line.242"></a>
-<span class="sourceLineNo">243</span>          
LOG.debug(String.format("reading from table %s region %s column family %s and 
key %s",<a name="line.243"></a>
-<span class="sourceLineNo">244</span>            tableDesc.getTableName(), 
region.getRegionNameAsString(), column.getNameAsString(),<a name="line.244"></a>
-<span class="sourceLineNo">245</span>            
Bytes.toStringBinary(startKey)));<a name="line.245"></a>
-<span class="sourceLineNo">246</span>        }<a name="line.246"></a>
-<span class="sourceLineNo">247</span>        try {<a name="line.247"></a>
-<span class="sourceLineNo">248</span>          stopWatch.start();<a 
name="line.248"></a>
-<span class="sourceLineNo">249</span>          if (startKey.length &gt; 0) {<a 
name="line.249"></a>
-<span class="sourceLineNo">250</span>            table.get(get);<a 
name="line.250"></a>
-<span class="sourceLineNo">251</span>          } else {<a name="line.251"></a>
-<span class="sourceLineNo">252</span>            rs = 
table.getScanner(scan);<a name="line.252"></a>
-<span class="sourceLineNo">253</span>            rs.next();<a 
name="line.253"></a>
-<span class="sourceLineNo">254</span>          }<a name="line.254"></a>
-<span class="sourceLineNo">255</span>          stopWatch.stop();<a 
name="line.255"></a>
-<span class="sourceLineNo">256</span>          sink.publishReadTiming(region, 
column, stopWatch.getTime());<a name="line.256"></a>
-<span class="sourceLineNo">257</span>        } catch (Exception e) {<a 
name="line.257"></a>
-<span class="sourceLineNo">258</span>          sink.publishReadFailure(region, 
column, e);<a name="line.258"></a>
-<span class="sourceLineNo">259</span>        } finally {<a name="line.259"></a>
-<span class="sourceLineNo">260</span>          if (rs != null) {<a 
name="line.260"></a>
-<span class="sourceLineNo">261</span>            rs.close();<a 
name="line.261"></a>
-<span class="sourceLineNo">262</span>          }<a name="line.262"></a>
-<span class="sourceLineNo">263</span>          scan = null;<a 
name="line.263"></a>
-<span class="sourceLineNo">264</span>          get = null;<a 
name="line.264"></a>
-<span class="sourceLineNo">265</span>          startKey = null;<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>      try {<a name="line.268"></a>
-<span class="sourceLineNo">269</span>        table.close();<a 
name="line.269"></a>
-<span class="sourceLineNo">270</span>      } catch (IOException e) {<a 
name="line.270"></a>
-<span class="sourceLineNo">271</span>        LOG.error("Close table failed", 
e);<a name="line.271"></a>
-<span class="sourceLineNo">272</span>      }<a name="line.272"></a>
-<span class="sourceLineNo">273</span>      return null;<a name="line.273"></a>
-<span class="sourceLineNo">274</span>    }<a name="line.274"></a>
-<span class="sourceLineNo">275</span><a name="line.275"></a>
-<span class="sourceLineNo">276</span>    /**<a name="line.276"></a>
-<span class="sourceLineNo">277</span>     * Check writes for the canary 
table<a name="line.277"></a>
-<span class="sourceLineNo">278</span>     * @return<a name="line.278"></a>
-<span class="sourceLineNo">279</span>     */<a name="line.279"></a>
-<span class="sourceLineNo">280</span>    private Void write() {<a 
name="line.280"></a>
-<span class="sourceLineNo">281</span>      Table table = null;<a 
name="line.281"></a>
-<span class="sourceLineNo">282</span>      HTableDescriptor tableDesc = 
null;<a name="line.282"></a>
-<span class="sourceLineNo">283</span>      try {<a name="line.283"></a>
-<span class="sourceLineNo">284</span>        table = 
connection.getTable(region.getTable());<a name="line.284"></a>
-<span class="sourceLineNo">285</span>        tableDesc = 
table.getTableDescriptor();<a name="line.285"></a>
-<span class="sourceLineNo">286</span>        byte[] rowToCheck = 
region.getStartKey();<a name="line.286"></a>
-<span class="sourceLineNo">287</span>        if (rowToCheck.length == 0) {<a 
name="line.287"></a>
-<span class="sourceLineNo">288</span>          rowToCheck = new byte[]{0x0};<a 
name="line.288"></a>
-<span class="sourceLineNo">289</span>        }<a name="line.289"></a>
-<span class="sourceLineNo">290</span>        int writeValueSize =<a 
name="line.290"></a>
-<span class="sourceLineNo">291</span>            
connection.getConfiguration().getInt(HConstants.HBASE_CANARY_WRITE_VALUE_SIZE_KEY,
 10);<a name="line.291"></a>
-<span class="sourceLineNo">292</span>        for (HColumnDescriptor column : 
tableDesc.getColumnFamilies()) {<a name="line.292"></a>
-<span class="sourceLineNo">293</span>          Put put = new 
Put(rowToCheck);<a name="line.293"></a>
-<span class="sourceLineNo">294</span>          byte[] value = new 
byte[writeValueSize];<a name="line.294"></a>
-<span class="sourceLineNo">295</span>          Bytes.random(value);<a 
name="line.295"></a>
-<span class="sourceLineNo">296</span>          put.addColumn(column.getName(), 
HConstants.EMPTY_BYTE_ARRAY, value);<a name="line.296"></a>
-<span class="sourceLineNo">297</span><a name="line.297"></a>
-<span class="sourceLineNo">298</span>          if (LOG.isDebugEnabled()) {<a 
name="line.298"></a>
-<span class="sourceLineNo">299</span>            
LOG.debug(String.format("writing to table %s region %s column family %s and key 
%s",<a name="line.299"></a>
-<span class="sourceLineNo">300</span>              tableDesc.getTableName(), 
region.getRegionNameAsString(), column.getNameAsString(),<a name="line.300"></a>
-<span class="sourceLineNo">301</span>              
Bytes.toStringBinary(rowToCheck)));<a name="line.301"></a>
-<span class="sourceLineNo">302</span>          }<a name="line.302"></a>
-<span class="sourceLineNo">303</span>          try {<a name="line.303"></a>
-<span class="sourceLineNo">304</span>            long startTime = 
System.currentTimeMillis();<a name="line.304"></a>
-<span class="sourceLineNo">305</span>            table.put(put);<a 
name="line.305"></a>
-<span class="sourceLineNo">306</span>            long time = 
System.currentTimeMillis() - startTime;<a name="line.306"></a>
-<span class="sourceLineNo">307</span>            
sink.publishWriteTiming(region, column, time);<a name="line.307"></a>
-<span class="sourceLineNo">308</span>          } catch (Exception e) {<a 
name="line.308"></a>
-<span class="sourceLineNo">309</span>            
sink.publishWriteFailure(region, column, e);<a name="line.309"></a>
-<span class="sourceLineNo">310</span>          }<a name="line.310"></a>
-<span class="sourceLineNo">311</span>        }<a name="line.311"></a>
-<span class="sourceLineNo">312</span>        table.close();<a 
name="line.312"></a>
-<span class="sourceLineNo">313</span>      } catch (IOException e) {<a 
name="line.313"></a>
-<span class="sourceLineNo">314</span>        sink.publishWriteFailure(region, 
e);<a name="line.314"></a>
-<span class="sourceLineNo">315</span>      }<a name="line.315"></a>
-<span class="sourceLineNo">316</span>      return null;<a name="line.316"></a>
-<span class="sourceLineNo">317</span>    }<a name="line.317"></a>
-<span class="sourceLineNo">318</span>  }<a name="line.318"></a>
-<span class="sourceLineNo">319</span><a name="line.319"></a>
-<span class="sourceLineNo">320</span>  /**<a name="line.320"></a>
-<span class="sourceLineNo">321</span>   * Get one row from a region on the 
regionserver and outputs the latency, or the failure.<a name="line.321"></a>
-<span class="sourceLineNo">322</span>   */<a name="line.322"></a>
-<span class="sourceLineNo">323</span>  static class RegionServerTask 
implements Callable&lt;Void&gt; {<a name="line.323"></a>
-<span class="sourceLineNo">324</span>    private Connection connection;<a 
name="line.324"></a>
-<span class="sourceLineNo">325</span>    private String serverName;<a 
name="line.325"></a>
-<span class="sourceLineNo">326</span>    private HRegionInfo region;<a 
name="line.326"></a>
-<span class="sourceLineNo">327</span>    private ExtendedSink sink;<a 
name="line.327"></a>
-<span class="sourceLineNo">328</span>    private AtomicLong successes;<a 
name="line.328"></a>
-<span class="sourceLineNo">329</span><a name="line.329"></a>
-<span class="sourceLineNo">330</span>    RegionServerTask(Connection 
connection, String serverName, HRegionInfo region,<a name="line.330"></a>
-<span class="sourceLineNo">331</span>        ExtendedSink sink, AtomicLong 
successes) {<a name="line.331"></a>
-<span class="sourceLineNo">332</span>      this.connection = connection;<a 
name="line.332"></a>
-<span class="sourceLineNo">333</span>      this.serverName = serverName;<a 
name="line.333"></a>
-<span class="sourceLineNo">334</span>      this.region = region;<a 
name="line.334"></a>
-<span class="sourceLineNo">335</span>      this.sink = sink;<a 
name="line.335"></a>
-<span class="sourceLineNo">336</span>      this.successes = successes;<a 
name="line.336"></a>
-<span class="sourceLineNo">337</span>    }<a name="line.337"></a>
-<span class="sourceLineNo">338</span><a name="line.338"></a>
-<span class="sourceLineNo">339</span>    @Override<a name="line.339"></a>
-<span class="sourceLineNo">340</span>    public Void call() {<a 
name="line.340"></a>
-<span class="sourceLineNo">341</span>      TableName tableName = null;<a 
name="line.341"></a>
-<span class="sourceLineNo">342</span>      Table table = null;<a 
name="line.342"></a>
-<span class="sourceLineNo">343</span>      Get get = null;<a 
name="line.343"></a>
-<span class="sourceLineNo">344</span>      byte[] startKey = null;<a 
name="line.344"></a>
-<span class="sourceLineNo">345</span>      Scan scan = null;<a 
name="line.345"></a>
-<span class="sourceLineNo">346</span>      StopWatch stopWatch = new 
StopWatch();<a name="line.346"></a>
-<span class="sourceLineNo">347</span>      // monitor one region on every 
region server<a name="line.347"></a>
-<span class="sourceLineNo">348</span>      stopWatch.reset();<a 
name="line.348"></a>
-<span class="sourceLineNo">349</span>      try {<a name="line.349"></a>
-<span class="sourceLineNo">350</span>        tableName = region.getTable();<a 
name="line.350"></a>
-<span class="sourceLineNo">351</span>        table = 
connection.getTable(tableName);<a name="line.351"></a>
-<span class="sourceLineNo">352</span>        startKey = 
region.getStartKey();<a name="line.352"></a>
-<span class="sourceLineNo">353</span>        // Can't do a get on empty start 
row so do a Scan of first element if any instead.<a name="line.353"></a>
-<span class="sourceLineNo">354</span>        if (LOG.isDebugEnabled()) {<a 
name="line.354"></a>
-<span class="sourceLineNo">355</span>          
LOG.debug(String.format("reading from region server %s table %s region %s and 
key %s",<a name="line.355"></a>
-<span class="sourceLineNo">356</span>            serverName, 
region.getTable(), region.getRegionNameAsString(),<a name="line.356"></a>
-<span class="sourceLineNo">357</span>            
Bytes.toStringBinary(startKey)));<a name="line.357"></a>
-<span class="sourceLineNo">358</span>        }<a name="line.358"></a>
-<span class="sourceLineNo">359</span>        if (startKey.length &gt; 0) {<a 
name="line.359"></a>
-<span class="sourceLineNo">360</span>          get = new Get(startKey);<a 
name="line.360"></a>
-<span class="sourceLineNo">361</span>          get.setCacheBlocks(false);<a 
name="line.361"></a>
-<span class="sourceLineNo">362</span>          get.setFilter(new 
FirstKeyOnlyFilter());<a name="line.362"></a>
-<span class="sourceLineNo">363</span>          stopWatch.start();<a 
name="line.363"></a>
-<span class="sourceLineNo">364</span>          table.get(get);<a 
name="line.364"></a>
-<span class="sourceLineNo">365</span>          stopWatch.stop();<a 
name="line.365"></a>
-<span class="sourceLineNo">366</span>        } else {<a name="line.366"></a>
-<span class="sourceLineNo">367</span>          scan = new Scan();<a 
name="line.367"></a>
-<span class="sourceLineNo">368</span>          scan.setCacheBlocks(false);<a 
name="line.368"></a>
-<span class="sourceLineNo">369</span>          scan.setFilter(new 
FirstKeyOnlyFilter());<a name="line.369"></a>
-<span class="sourceLineNo">370</span>          scan.setCaching(1);<a 
name="line.370"></a>
-<span class="sourceLineNo">371</span>          scan.setMaxResultSize(1L);<a 
name="line.371"></a>
-<span class="sourceLineNo">372</span>          scan.setSmall(true);<a 
name="line.372"></a>
-<span class="sourceLineNo">373</span>          stopWatch.start();<a 
name="line.373"></a>
-<span class="sourceLineNo">374</span>          ResultScanner s = 
table.getScanner(scan);<a name="line.374"></a>
-<span class="sourceLineNo">375</span>          s.next();<a name="line.375"></a>
-<span class="sourceLineNo">376</span>          s.close();<a 
name="line.376"></a>
-<span class="sourceLineNo">377</span>          stopWatch.stop();<a 
name="line.377"></a>
-<span class="sourceLineNo">378</span>        }<a name="line.378"></a>
-<span class="sourceLineNo">379</span>        successes.incrementAndGet();<a 
name="line.379"></a>
-<span class="sourceLineNo">380</span>        
sink.publishReadTiming(tableName.getNameAsString(), serverName, 
stopWatch.getTime());<a name="line.380"></a>
-<span class="sourceLineNo">381</span>      } catch (TableNotFoundException 
tnfe) {<a name="line.381"></a>
-<span class="sourceLineNo">382</span>        LOG.error("Table may be deleted", 
tnfe);<a name="line.382"></a>
-<span class="sourceLineNo">383</span>        // This is ignored because it 
doesn't imply that the regionserver is dead<a name="line.383"></a>
-<span class="sourceLineNo">384</span>      } catch (TableNotEnabledException 
tnee) {<a name="line.384"></a>
-<span class="sourceLineNo">385</span>        // This is considered a success 
since we got a response.<a name="line.385"></a>
-<span class="sourceLineNo">386</span>        successes.incrementAndGet();<a 
name="line.386"></a>
-<span class="sourceLineNo">387</span>        LOG.debug("The targeted table was 
disabled.  Assuming success.");<a name="line.387"></a>
-<span class="sourceLineNo">388</span>      } catch (DoNotRetryIOException 
dnrioe) {<a name="line.388"></a>
-<span class="sourceLineNo">389</span>        
sink.publishReadFailure(tableName.getNameAsString(), serverName);<a 
name="line.389"></a>
-<span class="sourceLineNo">390</span>        LOG.error(dnrioe);<a 
name="line.390"></a>
-<span class="sourceLineNo">391</span>      } catch (IOException e) {<a 
name="line.391"></a>
-<span class="sourceLineNo">392</span>        
sink.publishReadFailure(tableName.getNameAsString(), serverName);<a 
name="line.392"></a>
-<span class="sourceLineNo">393</span>        LOG.error(e);<a 
name="line.393"></a>
-<span class="sourceLineNo">394</span>      } finally {<a name="line.394"></a>
-<span class="sourceLineNo">395</span>        if (table != null) {<a 
name="line.395"></a>
-<span class="sourceLineNo">396</span>          try {<a name="line.396"></a>
-<span class="sourceLineNo">397</span>            table.close();<a 
name="line.397"></a>
-<span class="sourceLineNo">398</span>          } catch (IOException e) {/* DO 
NOTHING */<a name="line.398"></a>
-<span class="sourceLineNo">399</span>            LOG.error("Close table 
failed", e);<a name="line.399"></a>
-<span class="sourceLineNo">400</span>          }<a name="line.400"></a>
-<span class="sourceLineNo">401</span>        }<a name="line.401"></a>
-<span class="sourceLineNo">402</span>        scan = null;<a 
name="line.402"></a>
-<span class="sourceLineNo">403</span>        get = null;<a name="line.403"></a>
-<span class="sourceLineNo">404</span>        startKey = null;<a 
name="line.404"></a>
-<span class="sourceLineNo">405</span>      }<a name="line.405"></a>
-<span class="sourceLineNo">406</span>      return null;<a name="line.406"></a>
-<span class="sourceLineNo">407</span>    }<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>  private static final int 
USAGE_EXIT_CODE = 1;<a name="line.410"></a>
-<span class="sourceLineNo">411</span>  private static final int 
INIT_ERROR_EXIT_CODE = 2;<a name="line.411"></a>
-<span class="sourceLineNo">412</span>  private static final int 
TIMEOUT_ERROR_EXIT_CODE = 3;<a name="line.412"></a>
-<span class="sourceLineNo">413</span>  private static final int 
ERROR_EXIT_CODE = 4;<a name="line.413"></a>
-<span class="sourceLineNo">414</span><a name="line.414"></a>
-<span class="sourceLineNo">415</span>  private static final long 
DEFAULT_INTERVAL = 6000;<a name="line.415"></a>
-<span class="sourceLineNo">416</span><a name="line.416"></a>
-<span class="sourceLineNo">417</span>  private static final long 
DEFAULT_TIMEOUT = 600000; // 10 mins<a name="line.417"></a>
-<span class="sourceLineNo">418</span>  private static final int 
MAX_THREADS_NUM = 16; // #threads to contact regions<a name="line.418"></a>
-<span class="sourceLineNo">419</span><a name="line.419"></a>
-<span class="sourceLineNo">420</span>  private static final Log LOG = 
LogFactory.getLog(Canary.class);<a name="line.420"></a>
-<span class="sourceLineNo">421</span><a name="line.421"></a>
-<span class="sourceLineNo">422</span>  public static final TableName 
DEFAULT_WRITE_TABLE_NAME = TableName.valueOf(<a name="line.422"></a>
-<span class="sourceLineNo">423</span>    
NamespaceDescriptor.SYSTEM_NAMESPACE_NAME_STR, "canary");<a name="line.423"></a>
-<span class="sourceLineNo">424</span><a name="line.424"></a>
-<span class="sourceLineNo">425</span>  private static final String 
CANARY_TABLE_FAMILY_NAME = "Test";<a name="line.425"></a>
-<span class="sourceLineNo">426</span><a name="line.426"></a>
-<span class="sourceLineNo">427</span>  private Configuration conf = null;<a 
name="line.427"></a>
-<span class="sourceLineNo">428</span>  private long interval = 0;<a 
name="line.428"></a>
-<span class="sourceLineNo">429</span>  private Sink sink = null;<a 
name="line.429"></a>
+<span class="sourceLineNo">181</span>  }<a name="line.181"></a>
+<span class="sourceLineNo">182</span><a name="line.182"></a>
+<span class="sourceLineNo">183</span>  /**<a name="line.183"></a>
+<span class="sourceLineNo">184</span>   * For each column family of the region 
tries to get one row and outputs the latency, or the<a name="line.184"></a>
+<span class="sourceLineNo">185</span>   * failure.<a name="line.185"></a>
+<span class="sourceLineNo">186</span>   */<a name="line.186"></a>
+<span class="sourceLineNo">187</span>  static class RegionTask implements 
Callable&lt;Void&gt; {<a name="line.187"></a>
+<span class="sourceLineNo">188</span>    public enum TaskType{<a 
name="line.188"></a>
+<span class="sourceLineNo">189</span>      READ, WRITE<a name="line.189"></a>
+<span class="sourceLineNo">190</span>    }<a name="line.190"></a>
+<span class="sourceLineNo">191</span>    private Connection connection;<a 
name="line.191"></a>
+<span class="sourceLineNo">192</span>    private HRegionInfo region;<a 
name="line.192"></a>
+<span class="sourceLineNo">193</span>    private Sink sink;<a 
name="line.193"></a>
+<span class="sourceLineNo">194</span>    private TaskType taskType;<a 
name="line.194"></a>
+<span class="sourceLineNo">195</span><a name="line.195"></a>
+<span class="sourceLineNo">196</span>    RegionTask(Connection connection, 
HRegionInfo region, Sink sink, TaskType taskType) {<a name="line.196"></a>
+<span class="sourceLineNo">197</span>      this.connection = connection;<a 
name="line.197"></a>
+<span class="sourceLineNo">198</span>      this.region = region;<a 
name="line.198"></a>
+<span class="sourceLineNo">199</span>      this.sink = sink;<a 
name="line.199"></a>
+<span class="sourceLineNo">200</span>      this.taskType = taskType;<a 
name="line.200"></a>
+<span class="sourceLineNo">201</span>    }<a name="line.201"></a>
+<span class="sourceLineNo">202</span><a name="line.202"></a>
+<span class="sourceLineNo">203</span>    @Override<a name="line.203"></a>
+<span class="sourceLineNo">204</span>    public Void call() {<a 
name="line.204"></a>
+<span class="sourceLineNo">205</span>      switch (taskType) {<a 
name="line.205"></a>
+<span class="sourceLineNo">206</span>      case READ:<a name="line.206"></a>
+<span class="sourceLineNo">207</span>        return read();<a 
name="line.207"></a>
+<span class="sourceLineNo">208</span>      case WRITE:<a name="line.208"></a>
+<span class="sourceLineNo">209</span>        return write();<a 
name="line.209"></a>
+<span class="sourceLineNo">210</span>      default:<a name="line.210"></a>
+<span class="sourceLineNo">211</span>        return read();<a 
name="line.211"></a>
+<span class="sourceLineNo">212</span>      }<a name="line.212"></a>
+<span class="sourceLineNo">213</span>    }<a name="line.213"></a>
+<span class="sourceLineNo">214</span><a name="line.214"></a>
+<span class="sourceLineNo">215</span>    public Void read() {<a 
name="line.215"></a>
+<span class="sourceLineNo">216</span>      Table table = null;<a 
name="line.216"></a>
+<span class="sourceLineNo">217</span>      HTableDescriptor tableDesc = 
null;<a name="line.217"></a>
+<span class="sourceLineNo">218</span>      try {<a name="line.218"></a>
+<span class="sourceLineNo">219</span>        if (LOG.isDebugEnabled()) {<a 
name="line.219"></a>
+<span class="sourceLineNo">220</span>          
LOG.debug(String.format("reading table descriptor for table %s",<a 
name="line.220"></a>
+<span class="sourceLineNo">221</span>            region.getTable()));<a 
name="line.221"></a>
+<span class="sourceLineNo">222</span>        }<a name="line.222"></a>
+<span class="sourceLineNo">223</span>        table = 
connection.getTable(region.getTable());<a name="line.223"></a>
+<span class="sourceLineNo">224</span>        tableDesc = 
table.getTableDescriptor();<a name="line.224"></a>
+<span class="sourceLineNo">225</span>      } catch (IOException e) {<a 
name="line.225"></a>
+<span class="sourceLineNo">226</span>        LOG.debug("sniffRegion failed", 
e);<a name="line.226"></a>
+<span class="sourceLineNo">227</span>        sink.publishReadFailure(region, 
e);<a name="line.227"></a>
+<span class="sourceLineNo">228</span>        if (table != null) {<a 
name="line.228"></a>
+<span class="sourceLineNo">229</span>          try {<a name="line.229"></a>
+<span class="sourceLineNo">230</span>            table.close();<a 
name="line.230"></a>
+<span class="sourceLineNo">231</span>          } catch (IOException ioe) {<a 
name="line.231"></a>
+<span class="sourceLineNo">232</span>            LOG.error("Close table 
failed", e);<a name="line.232"></a>
+<span class="sourceLineNo">233</span>          }<a name="line.233"></a>
+<span class="sourceLineNo">234</span>        }<a name="line.234"></a>
+<span class="sourceLineNo">235</span>        return null;<a 
name="line.235"></a>
+<span class="sourceLineNo">236</span>      }<a name="line.236"></a>
+<span class="sourceLineNo">237</span><a name="line.237"></a>
+<span class="sourceLineNo">238</span>      byte[] startKey = null;<a 
name="line.238"></a>
+<span class="sourceLineNo">239</span>      Get get = null;<a 
name="line.239"></a>
+<span class="sourceLineNo">240</span>      Scan scan = null;<a 
name="line.240"></a>
+<span class="sourceLineNo">241</span>      ResultScanner rs = null;<a 
name="line.241"></a>
+<span class="sourceLineNo">242</span>      StopWatch stopWatch = new 
StopWatch();<a name="line.242"></a>
+<span class="sourceLineNo">243</span>      for (HColumnDescriptor column : 
tableDesc.getColumnFamilies()) {<a name="line.243"></a>
+<span class="sourceLineNo">244</span>        stopWatch.reset();<a 
name="line.244"></a>
+<span class="sourceLineNo">245</span>        startKey = 
region.getStartKey();<a name="line.245"></a>
+<span class="sourceLineNo">246</span>        // Can't do a get on empty start 
row so do a Scan of first element if any instead.<a name="line.246"></a>
+<span class="sourceLineNo">247</span>        if (startKey.length &gt; 0) {<a 
name="line.247"></a>
+<span class="sourceLineNo">248</span>          get = new Get(startKey);<a 
name="line.248"></a>
+<span class="sourceLineNo">249</span>          get.setCacheBlocks(false);<a 
name="line.249"></a>
+<span class="sourceLineNo">250</span>          get.setFilter(new 
FirstKeyOnlyFilter());<a name="line.250"></a>
+<span class="sourceLineNo">251</span>          
get.addFamily(column.getName());<a name="line.251"></a>
+<span class="sourceLineNo">252</span>        } else {<a name="line.252"></a>
+<span class="sourceLineNo">253</span>          scan = new Scan();<a 
name="line.253"></a>
+<span class="sourceLineNo">254</span>          scan.setRaw(true);<a 
name="line.254"></a>
+<span class="sourceLineNo">255</span>          scan.setCaching(1);<a 
name="line.255"></a>
+<span class="sourceLineNo">256</span>          scan.setCacheBlocks(false);<a 
name="line.256"></a>
+<span class="sourceLineNo">257</span>          scan.setFilter(new 
FirstKeyOnlyFilter());<a name="line.257"></a>
+<span class="sourceLineNo">258</span>          
scan.addFamily(column.getName());<a name="line.258"></a>
+<span class="sourceLineNo">259</span>          scan.setMaxResultSize(1L);<a 
name="line.259"></a>
+<span class="sourceLineNo">260</span>          scan.setSmall(true);<a 
name="line.260"></a>
+<span class="sourceLineNo">261</span>        }<a name="line.261"></a>
+<span class="sourceLineNo">262</span><a name="line.262"></a>
+<span class="sourceLineNo">263</span>        if (LOG.isDebugEnabled()) {<a 
name="line.263"></a>
+<span class="sourceLineNo">264</span>          
LOG.debug(String.format("reading from table %s region %s column family %s and 
key %s",<a name="line.264"></a>
+<span class="sourceLineNo">265</span>            tableDesc.getTableName(), 
region.getRegionNameAsString(), column.getNameAsString(),<a name="line.265"></a>
+<span class="sourceLineNo">266</span>            
Bytes.toStringBinary(startKey)));<a name="line.266"></a>
+<span class="sourceLineNo">267</span>        }<a name="line.267"></a>
+<span class="sourceLineNo">268</span>        try {<a name="line.268"></a>
+<span class="sourceLineNo">269</span>          stopWatch.start();<a 
name="line.269"></a>
+<span class="sourceLineNo">270</span>          if (startKey.length &gt; 0) {<a 
name="line.270"></a>
+<span class="sourceLineNo">271</span>            table.get(get);<a 
name="line.271"></a>
+<span class="sourceLineNo">272</span>          } else {<a name="line.272"></a>
+<span class="sourceLineNo">273</span>            rs = 
table.getScanner(scan);<a name="line.273"></a>
+<span class="sourceLineNo">274</span>            rs.next();<a 
name="line.274"></a>
+<span class="sourceLineNo">275</span>          }<a name="line.275"></a>
+<span class="sourceLineNo">276</span>          stopWatch.stop();<a 
name="line.276"></a>
+<span class="sourceLineNo">277</span>          sink.publishReadTiming(region, 
column, stopWatch.getTime());<a name="line.277"></a>
+<span class="sourceLineNo">278</span>        } catch (Exception e) {<a 
name="line.278"></a>
+<span class="sourceLineNo">279</span>          sink.publishReadFailure(region, 
column, e);<a name="line.279"></a>
+<span class="sourceLineNo">280</span>        } finally {<a name="line.280"></a>
+<span class="sourceLineNo">281</span>          if (rs != null) {<a 
name="line.281"></a>
+<span class="sourceLineNo">282</span>            rs.close();<a 
name="line.282"></a>
+<span class="sourceLineNo">283</span>          }<a name="line.283"></a>
+<span class="sourceLineNo">284</span>          scan = null;<a 
name="line.284"></a>
+<span class="sourceLineNo">285</span>          get = null;<a 
name="line.285"></a>
+<span class="sourceLineNo">286</span>          startKey = null;<a 
name="line.286"></a>
+<span class="sourceLineNo">287</span>        }<a name="line.287"></a>
+<span class="sourceLineNo">288</span>      }<a name="line.288"></a>
+<span class="sourceLineNo">289</span>      try {<a name="line.289"></a>
+<span class="sourceLineNo">290</span>        table.close();<a 
name="line.290"></a>
+<span class="sourceLineNo">291</span>      } catch (IOException e) {<a 
name="line.291"></a>
+<span class="sourceLineNo">292</span>        LOG.error("Close table failed", 
e);<a name="line.292"></a>
+<span class="sourceLineNo">293</span>      }<a name="line.293"></a>
+<span class="sourceLineNo">294</span>      return null;<a name="line.294"></a>
+<span class="sourceLineNo">295</span>    }<a name="line.295"></a>
+<span class="sourceLineNo">296</span><a name="line.296"></a>
+<span class="sourceLineNo">297</span>    /**<a name="line.297"></a>
+<span class="sourceLineNo">298</span>     * Check writes for the canary 
table<a name="line.298"></a>
+<span class="sourceLineNo">299</span>     * @return<a name="line.299"></a>
+<span class="sourceLineNo">300</span>     */<a name="line.300"></a>
+<span class="sourceLineNo">301</span>    private Void write() {<a 
name="line.301"></a>
+<span class="sourceLineNo">302</span>      Table table = null;<a 
name="line.302"></a>
+<span class="sourceLineNo">303</span>      HTableDescriptor tableDesc = 
null;<a name="line.303"></a>
+<span class="sourceLineNo">304</span>      try {<a name="line.304"></a>
+<span class="sourceLineNo">305</span>        table = 
connection.getTable(region.getTable());<a name="line.305"></a>
+<span class="sourceLineNo">306</span>        tableDesc = 
table.getTableDescriptor();<a name="line.306"></a>
+<span class="sourceLineNo">307</span>        byte[] rowToCheck = 
region.getStartKey();<a name="line.307"></a>
+<span class="sourceLineNo">308</span>        if (rowToCheck.length == 0) {<a 
name="line.308"></a>
+<span class="sourceLineNo">309</span>          rowToCheck = new byte[]{0x0};<a 
name="line.309"></a>
+<span class="sourceLineNo">310</span>        }<a name="line.310"></a>
+<span class="sourceLineNo">311</span>        int writeValueSize =<a 
name="line.311"></a>
+<span class="sourceLineNo">312</span>            
connection.getConfiguration().getInt(HConstants.HBASE_CANARY_WRITE_VALUE_SIZE_KEY,
 10);<a name="line.312"></a>
+<span class="sourceLineNo">313</span>        for (HColumnDescriptor column : 
tableDesc.getColumnFamilies()) {<a name="line.313"></a>
+<span class="sourceLineNo">314</span>          Put put = new 
Put(rowToCheck);<a name="line.314"></a>
+<span class="sourceLineNo">315</span>          byte[] value = new 
byte[writeValueSize];<a name="line.315"></a>
+<span class="sourceLineNo">316</span>          Bytes.random(value);<a 
name="line.316"></a>
+<span class="sourceLineNo">317</span>          put.addColumn(column.getName(), 
HConstants.EMPTY_BYTE_ARRAY, value);<a name="line.317"></a>
+<span class="sourceLineNo">318</span><a name="line.318"></a>
+<span class="sourceLineNo">319</span>          if (LOG.isDebugEnabled()) {<a 
name="line.319"></a>
+<span class="sourceLineNo">320</span>            
LOG.debug(String.format("writing to table %s region %s column family %s and key 
%s",<a name="line.320"></a>
+<span class="sourceLineNo">321</span>              tableDesc.getTableName(), 
region.getRegionNameAsString(), column.getNameAsString(),<a name="line.321"></a>
+<span class="sourceLineNo">322</span>              
Bytes.toStringBinary(rowToCheck)));<a name="line.322"></a>
+<span class="sourceLineNo">323</span>          }<a name="line.323"></a>
+<span class="sourceLineNo">324</span>          try {<a name="line.324"></a>
+<span class="sourceLineNo">325</span>            long startTime = 
System.currentTimeMillis();<a name="line.325"></a>
+<span class="sourceLineNo">326</span>            table.put(put);<a 
name="line.326"></a>
+<span class="sourceLineNo">327</span>            long time = 
System.currentTimeMillis() - startTime;<a name="line.327"></a>
+<span class="sourceLineNo">328</span>            
sink.publishWriteTiming(region, column, time);<a name="line.328"></a>
+<span class="sourceLineNo">329</span>          } catch (Exception e) {<a 
name="line.329"></a>
+<span class="sourceLineNo">330</span>            
sink.publishWriteFailure(region, column, e);<a name="line.330"></a>
+<span class="sourceLineNo">331</span>          }<a name="line.331"></a>
+<span class="sourceLineNo">332</span>        }<a name="line.332"></a>
+<span class="sourceLineNo">333</span>        table.close();<a 
name="line.333"></a>
+<span class="sourceLineNo">334</span>      } catch (IOException e) {<a 
name="line.334"></a>
+<span class="sourceLineNo">335</span>        sink.publishWriteFailure(region, 
e);<a name="line.335"></a>
+<span class="sourceLineNo">336</span>      }<a name="line.336"></a>
+<span class="sourceLineNo">337</span>      return null;<a name="line.337"></a>
+<span class="sourceLineNo">338</span>    }<a name="line.338"></a>
+<span class="sourceLineNo">339</span>  }<a name="line.339"></a>
+<span class="sourceLineNo">340</span><a name="line.340"></a>
+<span class="sourceLineNo">341</span>  /**<a name="line.341"></a>
+<span class="sourceLineNo">342</span>   * Get one row from a region on the 
regionserver and outputs the latency, or the failure.<a name="line.342"></a>
+<span class="sourceLineNo">343</span>   */<a name="line.343"></a>
+<span class="sourceLineNo">344</span>  static class RegionServerTask 
implements Callable&lt;Void&gt; {<a name="line.344"></a>
+<span class="sourceLineNo">345</span>    private Connection connection;<a 
name="line.345"></a>
+<span class="sourceLineNo">346</span>    private String serverName;<a 
name="line.346"></a>
+<span class="sourceLineNo">347</span>    private HRegionInfo region;<a 
name="line.347"></a>
+<span class="sourceLineNo">348</span>    private ExtendedSink sink;<a 
name="line.348"></a>
+<span class="sourceLineNo">349</span>    private AtomicLong successes;<a 
name="line.349"></a>
+<span class="sourceLineNo">350</span><a name="line.350"></a>
+<span class="sourceLineNo">351</span>    RegionServerTask(Connection 
connection, String serverName, HRegionInfo region,<a name="line.351"></a>
+<span class="sourceLineNo">352</span>        ExtendedSink sink, AtomicLong 
successes) {<a name="line.352"></a>
+<span class="sourceLineNo">353</span>      this.connection = connection;<a 
name="line.353"></a>
+<span class="sourceLineNo">354</span>      this.serverName = serverName;<a 
name="line.354"></a>
+<span class="sourceLineNo">355</span>      this.region = region;<a 
name="line.355"></a>
+<span class="sourceLineNo">356</span>      this.sink = sink;<a 
name="line.356"></a>
+<span class="sourceLineNo">357</span>      this.successes = successes;<a 
name="line.357"></a>
+<span class="sourceLineNo">358</span>    }<a name="line.358"></a>
+<span class="sourceLineNo">359</span><a name="line.359"></a>
+<span class="sourceLineNo">360</span>    @Override<a name="line.360"></a>
+<span class="sourceLineNo">361</span>    public Void call() {<a 
name="line.361"></a>
+<span class="sourceLineNo">362</span>      TableName tableName = null;<a 
name="line.362"></a>
+<span class="sourceLineNo">363</span>      Table table = null;<a 
name="line.363"></a>
+<span class="sourceLineNo">364</span>      Get get = null;<a 
name="line.364"></a>
+<span class="sourceLineNo">365</span>      byte[] startKey = null;<a 
name="line.365"></a>
+<span class="sourceLineNo">366</span>      Scan scan = null;<a 
name="line.366"></a>
+<span class="sourceLineNo">367</span>      StopWatch stopWatch = new 
StopWatch();<a name="line.367"></a>
+<span class="sourceLineNo">368</span>      // monitor one region on every 
region server<a name="line.368"></a>
+<span class="sourceLineNo">369</span>      stopWatch.reset();<a 
name="line.369"></a>
+<span class="sourceLineNo">370</span>      try {<a name="line.370"></a>
+<span class="sourceLineNo">371</span>        tableName = region.getTable();<a 
name="line.371"></a>
+<span class="sourceLineNo">372</span>        table = 
connection.getTable(tableName);<a name="line.372"></a>
+<span class="sourceLineNo">373</span>        startKey = 
region.getStartKey();<a name="line.373"></a>
+<span class="sourceLineNo">374</span>        // Can't do a get on empty start 
row so do a Scan of first element if any instead.<a name="line.374"></a>
+<span class="sourceLineNo">375</span>        if (LOG.isDebugEnabled()) {<a 
name="line.375"></a>
+<span class="sourceLineNo">376</span>          
LOG.debug(String.format("reading from region server %s table %s region %s and 
key %s",<a name="line.376"></a>
+<span class="sourceLineNo">377</span>            serverName, 
region.getTable(), region.getRegionNameAsString(),<a name="line.377"></a>
+<span class="sourceLineNo">378</span>            
Bytes.toStringBinary(startKey)));<a name="line.378"></a>
+<span class="sourceLineNo">379</span>        }<a name="line.379"></a>
+<span class="sourceLineNo">380</span>        if (startKey.length &gt; 0) {<a 
name="line.380"></a>
+<span class="sourceLineNo">381</span>          get = new Get(startKey);<a 
name="line.381"></a>
+<span class="sourceLineNo">382</span>          get.setCacheBlocks(false);<a 
name="line.382"></a>
+<span class="sourceLineNo">383</span>          get.setFilter(new 
FirstKeyOnlyFilter());<a name="line.383"></a>
+<span class="sourceLineNo">384</span>          stopWatch.start();<a 
name="line.384"></a>
+<span class="sourceLineNo">385</span>          table.get(get);<a 
name="line.385"></a>
+<span class="sourceLineNo">386</span>          stopWatch.stop();<a 
name="line.386"></a>
+<span class="sourceLineNo">387</span>        } else {<a name="line.387"></a>
+<span class="sourceLineNo">388</span>          scan = new Scan();<a 
name="line.388"></a>
+<span class="sourceLineNo">389</span>          scan.setCacheBlocks(false);<a 
name="line.389"></a>
+<span class="sourceLineNo">390</span>          scan.setFilter(new 
FirstKeyOnlyFilter());<a name="line.390"></a>
+<span class="sourceLineNo">391</span>          scan.setCaching(1);<a 
name="line.391"></a>
+<span class="sourceLineNo">392</span>          scan.setMaxResultSize(1L);<a 
name="line.392"></a>
+<span class="sourceLineNo">393</span>          scan.setSmall(true);<a 
name="line.393"></a>
+<span class="sourceLineNo">394</span>          stopWatch.start();<a 
name="line.394"></a>
+<span class="sourceLineNo">395</span>          ResultScanner s = 
table.getScanner(scan);<a name="line.395"></a>
+<span class="sourceLineNo">396</span>          s.next();<a name="line.396"></a>
+<span class="sourceLineNo">397</span>          s.close();<a 
name="line.397"></a>
+<span class="sourceLineNo">398</span>          stopWatch.stop();<a 
name="line.398"></a>
+<span class="sourceLineNo">399</span>        }<a name="line.399"></a>
+<span class="sourceLineNo">400</span>        successes.incrementAndGet();<a 
name="line.400"></a>
+<span class="sourceLineNo">401</span>        
sink.publishReadTiming(tableName.getNameAsString(), serverName, 
stopWatch.getTime());<a name="line.401"></a>
+<span class="sourceLineNo">402</span>      } catch (TableNotFoundException 
tnfe) {<a name="line.402"></a>
+<span class="sourceLineNo">403</span>        LOG.error("Table may be deleted", 
tnfe);<a name="line.403"></a>
+<span class="sourceLineNo">404</span>        // This is ignored because it 
doesn't imply that the regionserver is dead<a name="line.404"></a>
+<span class="sourceLineNo">405</span>      } catch (TableNotEnabledException 
tnee) {<a name="line.405"></a>
+<span class="sourceLineNo">406</span>        // This is considered a success 
since we got a response.<a name="line.406"></a>
+<span class="sourceLineNo">407</span>        successes.incrementAndGet();<a 
name="line.407"></a>
+<span class="sourceLineNo">408</span>        LOG.debug("The targeted table was 
disabled.  Assuming success.");<a name="line.408"></a>
+<span class="sourceLineNo">409</span>      } catch (DoNotRetryIOException 
dnrioe) {<a name="line.409"></a>
+<span class="sourceLineNo">410</span>        
sink.publishReadFailure(tableName.getNameAsString(), serverName);<a 
name="line.410"></a>
+<span class="sourceLineNo">411</span>        LOG.error(dnrioe);<a 
name="line.411"></a>
+<span class="sourceLineNo">412</span>      } catch (IOException e) {<a 
name="line.412"></a>
+<span class="sourceLineNo">413</span>        
sink.publishReadFailure(tableName.getNameAsString(), serverName);<a 
name="line.413"></a>
+<span class="sourceLineNo">414</span>        LOG.error(e);<a 
name="line.414"></a>
+<span class="sourceLineNo">415</span>      } finally {<a name="line.415"></a>
+<span class="sourceLineNo">416</span>        if (table != null) {<a 
name="line.416"></a>
+<span class="sourceLineNo">417</span>          try {<a name="line.417"></a>
+<span class="sourceLineNo">418</span>            table.close();<a 
name="line.418"></a>
+<span class="sourceLineNo">419</span>          } catch (IOException e) {/* DO 
NOTHING */<a name="line.419"></a>
+<span class="sourceLineNo">420</span>            LOG.error("Close table 
failed", e);<a name="line.420"></a>
+<span class="sourceLineNo">421</span>          }<a name="line.421"></a>
+<span class="sourceLineNo">422</span>        }<a name="line.422"></a>
+<span class="sourceLineNo">423</span>        scan = null;<a 
name="line.423"></a>
+<span class="sourceLineNo">424</span>        get = null;<a name="line.424"></a>
+<span class="sourceLineNo">425</span>        startKey = null;<a 
name="line.425"></a>
+<span class="sourceLineNo">426</span>      }<a name="line.426"></a>
+<span class="sourceLineNo">427</span>      return null;<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><a name="line.430"></a>
-<span class="sourceLineNo">431</span>  private boolean useRegExp;<a 
name="line.431"></a>
-<span class="sourceLineNo">432</span>  private long timeout = 
DEFAULT_TIMEOUT;<a name="line.432"></a>
-<span class="sourceLineNo">433</span>  private boolean failOnError = true;<a 
name="line.433"></a>
-<span class="sourceLineNo">434</span>  private boolean regionServerMode = 
false;<a name="line.434"></a>
-<span class="sourceLineNo">435</span>  private boolean regionServerAllRegions 
= false;<a name="line.435"></a>
-<span class="sourceLineNo">436</span>  private boolean writeSniffing = 
false;<a name="line.436"></a>
-<span class="sourceLineNo">437</span>  private TableName writeTableName = 
DEFAULT_WRITE_TABLE_NAME;<a name="line.437"></a>
-<span class="sourceLineNo">438</span><a name="line.438"></a>
-<span class="sourceLineNo">439</span>  private ExecutorService executor; // 
threads to retrieve data from regionservers<a name="line.439"></a>
+<span class="sourceLineNo">431</span>  private static final int 
USAGE_EXIT_CODE = 1;<a name="line.431"></a>
+<span class="sourceLineNo">432</span>  private static final int 
INIT_ERROR_EXIT_CODE = 2;<a name="line.432"></a>
+<span class="sourceLineNo">433</span>  private static final int 
TIMEOUT_ERROR_EXIT_CODE = 3;<a name="line.433"></a>
+<span class="sourceLineNo">434</span>  private static final int 
ERROR_EXIT_CODE = 4;<a name="line.434"></a>
+<span class="sourceLineNo">435</span><a name="line.435"></a>
+<span class="sourceLineNo">436</span>  private static final long 
DEFAULT_INTERVAL = 6000;<a name="line.436"></a>
+<span class="sourceLineNo">437</span><a name="line.437"></a>
+<span class="sourceLineNo">438</span>  private static final long 
DEFAULT_TIMEOUT = 600000; // 10 mins<a name="line.438"></a>
+<span class="sourceLineNo">439</span>  private static final int 
MAX_THREADS_NUM = 16; // #threads to contact regions<a name="line.439"></a>
 <span class="sourceLineNo">440</span><a name="line.440"></a>
-<span class="sourceLineNo">441</span>  public Canary() {<a name="line.441"></a>
-<span class="sourceLineNo">442</span>    this(new 
ScheduledThreadPoolExecutor(1), new RegionServerStdOutSink());<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 Canary(ExecutorService executor, 
Sink sink) {<a name="line.445"></a>
-<span class="sourceLineNo">446</span>    this.executor = executor;<a 
name="line.446"></a>
-<span class="sourceLineNo">447</span>    this.sink = sink;<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>  @Override<a name="line.450"></a>
-<span class="sourceLineNo">451</span>  public Configuration getConf() {<a 
name="line.451"></a>
-<span class="sourceLineNo">452</span>    return conf;<a name="line.452"></a>
-<span class="sourceLineNo">453</span>  }<a name="line.453"></a>
-<span class="sourceLineNo">454</span><a name="line.454"></a>
-<span class="sourceLineNo">455</span>  @Override<a name="line.455"></a>
-<span class="sourceLineNo">456</span>  public void setConf(Configuration conf) 
{<a name="line.456"></a>
-<span class="sourceLineNo">457</span>    this.conf = conf;<a 
name="line.457"></a>
-<span class="sourceLineNo">458</span>  }<a name="line.458"></a>
-<span class="sourceLineNo">459</span><a name="line.459"></a>
-<span class="sourceLineNo">460</span>  private int parseArgs(String[] args) 
{<a name="line.460"></a>
-<span class="sourceLineNo">461</span>    int index = -1;<a name="line.461"></a>
-<span class="sourceLineNo">462</span>    // Process command line args<a 
name="line.462"></a>
-<span class="sourceLineNo">463</span>    for (int i = 0; i &lt; args.length; 
i++) {<a name="line.463"></a>
-<span class="sourceLineNo">464</span>      String cmd = args[i];<a 
name="line.464"></a>
-<span class="sourceLineNo">465</span><a name="line.465"></a>
-<span class="sourceLineNo">466</span>      if (cmd.startsWith("-")) {<a 
name="line.466"></a>
-<span class="sourceLineNo">467</span>        if (index &gt;= 0) {<a 
name="line.467"></a>
-<span class="sourceLineNo">468</span>          // command line args must be in 
the form: [opts] [table 1 [table 2 ...]]<a name="line.468"></a>
-<span class="sourceLineNo">469</span>          System.err.println("Invalid 
command line options");<a name="line.469"></a>
-<span class="sourceLineNo">470</span>          printUsageAndExit();<a 
name="line.470"></a>
-<span class="sourceLineNo">471</span>        }<a name="line.471"></a>
-<span class="sourceLineNo">472</span><a name="line.472"></a>
-<span class="sourceLineNo">473</span>        if (cmd.equals("-help")) {<a 
name="line.473"></a>
-<span class="sourceLineNo">474</span>          // user asked for help, print 
the help and quit.<a name="line.474"></a>
-<span class="sourceLineNo">475</span>          printUsageAndExit();<a 
name="line.475"></a>
-<span class="sourceLineNo">476</span>        } else if (cmd.equals("-daemon") 
&amp;&amp; interval == 0) {<a name="line.476"></a>
-<span class="sourceLineNo">477</span>          // user asked for daemon mode, 
set a default interval between checks<a name="line.477"></a>
-<span class="sourceLineNo">478</span>          interval = DEFAULT_INTERVAL;<a 
name="line.478"></a>
-<span class="sourceLineNo">479</span>        } else if 
(cmd.equals("-interval")) {<a name="line.479"></a>
-<span class="sourceLineNo">480</span>          // user has specified an 
interval for canary breaths (-interval N)<a name="line.480"></a>
-<span class="sourceLineNo">481</span>          i++;<a name="line.481"></a>
-<span class="sourceLineNo">482</span><a name="line.482"></a>
-<span class="sourceLineNo">483</span>          if (i == args.length) {<a 
name="line.483"></a>
-<span class="sourceLineNo">484</span>            System.err.println("-interval 
needs a numeric value argument.");<a name="line.484"></a>
-<span class="sourceLineNo">485</span>            printUsageAndExit();<a 
name="line.485"></a>
-<span class="sourceLineNo">486</span>          }<a name="line.486"></a>
+<span class="sourceLineNo">441</span>  private static final Log LOG = 
LogFactory.getLog(Canary.class);<a name="line.441"></a>
+<span class="sourceLineNo">442</span><a name="line.442"></a>
+<span class="sourceLineNo">443</span>  public static final TableName 
DEFAULT_WRITE_TABLE_NAME = TableName.valueOf(<a name="line.443"></a>
+<span class="sourceLineNo">444</span>    
NamespaceDescriptor.SYSTEM_NAMESPACE_NAME_STR, "canary");<a name="line.444"></a>
+<span class="sourceLineNo">445</span><a name="line.445"></a>
+<span class="sourceLineNo">446</span>  private static final String 
CANARY_TABLE_FAMILY_NAME = "Test";<a name="line.446"></a>
+<span class="sourceLineNo">447</span><a name="line.447"></a>
+<span class="sourceLineNo">448</span>  private Configuration conf = null;<a 
name="line.448"></a>
+<span class="sourceLineNo">449</span>  private long interval = 0;<a 
name="line.449"></a>
+<span class="sourceLineNo">450</span>  private Sink sink = null;<a 
name="line.450"></a>
+<span class="sourceLineNo">451</span><a name="line.451"></a>
+<span class="sourceLineNo">452</span>  private boolean useRegExp;<a 
name="line.452"></a>
+<span class="sourceLineNo">453</span>  private long timeout = 
DEFAULT_TIMEOUT;<a name="line.453"></a>
+<span class="sourceLineNo">454</span>  private boolean failOnError = true;<a 
name="line.454"></a>
+<span class="sourceLineNo">455</span>  private boolean regionServerMode = 
false;<a name="line.455"></a>
+<span class="sourceLineNo">456</span>  private boolean regionServerAllRegions 
= false;<a name="line.456"></a>
+<span class="sourceLineNo">457</span>  private boolean writeSniffing = 
false;<a name="line.457"></a>
+<span class="sourceLineNo">458</span>  private boolean treatFailureAsError = 
false;<a name="line.458"></a>
+<span class="sourceLineNo">459</span>  private TableName writeTableName = 
DEFAULT_WRITE_TABLE_NAME;<a name="line.459"></a>
+<span class="sourceLineNo">460</span><a name="line.460"></a>
+<span class="sourceLineNo">461</span>  private ExecutorService executor; // 
threads to retrieve data from regionservers<a name="line.461"></a>
+<span class="sourceLineNo">462</span><a name="line.462"></a>
+<span class="sourceLineNo">463</span>  public Canary() {<a name="line.463"></a>
+<span class="sourceLineNo">464</span>    this(new 
ScheduledThreadPoolExecutor(1), new RegionServerStdOutSink());<a 
name="line.464"></a>
+<span class="sourceLineNo">465</span>  }<a name="line.465"></a>
+<span class="sourceLineNo">466</span><a name="line.466"></a>
+<span class="sourceLineNo">467</span>  public Canary(ExecutorService executor, 
Sink sink) {<a name="line.467"></a>
+<span class="sourceLineNo">468</span>    this.executor = executor;<a 
name="line.468"></a>
+<span class="sourceLineNo">469</span>    this.sink = sink;<a 
name="line.469"></a>
+<span class="sourceLineNo">470</span>  }<a name="line.470"></a>
+<span class="sourceLineNo">471</span><a name="line.471"></a>
+<span class="sourceLineNo">472</span>  @Override<a name="line.472"></a>
+<span class="sourceLineNo">473</span>  public Configuration getConf() {<a 
name="line.473"></a>
+<span class="sourceLineNo">474</span>    return conf;<a name="line.474"></a>
+<span class="sourceLineNo">475</span>  }<a name="line.475"></a>
+<span class="sourceLineNo">476</span><a name="line.476"></a>
+<span class="sourceLineNo">477</span>  @Override<a name="line.477"></a>
+<span class="sourceLineNo">478</span>  public void setConf(Configuration conf) 
{<a name="line.478"></a>
+<span class="sourceLineNo">479</span>    this.conf = conf;<a 
name="line.479"></a>
+<span class="sourceLineNo">480</span>  }<a name="line.480"></a>
+<span class="sourceLineNo">481</span><a name="line.481"></a>
+<span class="sourceLineNo">482</span>  private int parseArgs(String[] args) 
{<a name="line.482"></a>
+<span class="sourceLineNo">483</span>    int index = -1;<a name="line.483"></a>
+<span class="sourceLineNo">484</span>    // Process command line args<a 
name="line.484"></a>
+<span class="sourceLineNo">485</span>    for (int i = 0; i &lt; args.length; 
i++) {<a name="line.485"></a>
+<span class="sourceLineNo">486</span>      String cmd = args[i];<a 
name="line.486"></a>
 <span class="sourceLineNo">487</span><a name="line.487"></a>
-<span class="sourceLineNo">488</span>          try {<a name="line.488"></a>
-<span class="sourceLineNo">489</span>            interval = 
Long.parseLong(args[i]) * 1000;<a name="line.489"></a>
-<span class="sourceLineNo">490</span>          } catch (NumberFormatException 
e) {<a name="line.490"></a>
-<span class="sourceLineNo">491</span>            System.err.println("-interval 
needs a numeric value argument.");<a name="line.491"></a>
-<span class="sourceLineNo">492</span>            printUsageAndExit();<a 
name="line.492"></a>
-<span class="sourceLineNo">493</span>          }<a name="line.493"></a>
-<span class="sourceLineNo">494</span>        } else 
if(cmd.equals("-regionserver")) {<a name="line.494"></a>
-<span class="sourceLineNo">495</span>          this.regionServerMode = true;<a 
name="line.495"></a>
-<span class="sourceLineNo">496</span>        } else 
if(cmd.equals("-allRegions")) {<a name="line.496"></a>
-<span class="sourceLineNo">497</span>          this.regionServerAllRegions = 
true;<a name="line.497"></a>
-<span class="sourceLineNo">498</span>        } else 
if(cmd.equals("-writeSniffing")) {<a name="line.498"></a>
-<span class="sourceLineNo">499</span>          this.writeSniffing = true;<a 
name="line.499"></a>
-<span class="sourceLineNo">500</span>        } else if (cmd.equals("-e")) {<a 
name="line.500"></a>
-<span class="sourceLineNo">501</span>          this.useRegExp = true;<a 
name="line.501"></a>
-<span class="sourceLineNo">502</span>        } else if (cmd.equals("-t")) {<a 
name="line.502"></a>
+<span class="sourceLineNo">488</span>      if (cmd.startsWith("-")) {<a 
name="line.488"></a>
+<span class="sourceLineNo">489</span>        if (index &gt;= 0) {<a 
name="line.489"></a>
+<span class="sourceLineNo">490</span>          // command line args must be in 
the form: [opts] [table 1 [table 2 ...]]<a name="line.490"></a>
+<span class="sourceLineNo">491</span>          System.err.println("Invalid 
command line options");<a name="line.491"></a>
+<span class="sourceLineNo">492</span>          printUsageAndExit();<a 
name="line.492"></a>
+<span class="sourceLineNo">493</span>        }<a name="line.493"></a>
+<span class="sourceLineNo">494</span><a name="line.494"></a>
+<span class="sourceLineNo">495</span>        if (cmd.equals("-help")) {<a 
name="line.495"></a>
+<span class="sourceLineNo">496</span>          // user asked for help, print 
the help and quit.<a name="line.496"></a>
+<span class="sourceLineNo">497</span>          printUsageAndExit();<a 
name="line.497"></a>
+<span class="sourceLineNo">498</span>        } else if (cmd.equals("-daemon") 
&amp;&amp; interval == 0) {<a name="line.498"></a>
+<span class="sourceLineNo">499</span>          // user asked for daemon mode, 
set a default interval between checks<a name="line.499"></a>
+<span class="sourceLineNo">500</span>          interval = DEFAULT_INTERVAL;<a 
name="line.500"></a>
+<span class="sourceLineNo">501</span>        } else if 
(cmd.equals("-interval")) {<a name="line.501"></a>
+<span class="sourceLineNo">502</span>          // user has specified an 
interval for canary breaths (-interval N)<a name="line.502"></a>
 <span class="sourceLineNo">503</span>          i++;<a name="line.503"></a>
 <span class="sourceLineNo">504</span><a name="line.504"></a>
 <span class="sourceLineNo">505</span>          if (i == args.length) {<a 
name="line.505"></a>
-<span class="sourceLineNo">506</span>            System.err.println("-t needs 
a numeric value argument.");<a name="line.506"></a>
+<span class="sourceLineNo">506</span>            System.err.println("-interval 
needs a numeric value argument.");<a name="line.506"></a>
 <span class="sourceLineNo">507</span>            printUsageAndExit();<a 
name="line.507"></a>
 <span class="sourceLineNo">508</span>          }<a name="line.508"></a>
 <span class="sourceLineNo">509</span><a name="line.509"></a>
 <span class="sourceLineNo">510</span>          try {<a name="line.510"></a>
-<span class="sourceLineNo">511</span>            this.timeout = 
Long.parseLong(args[i]);<a name="line.511"></a>
+<span class="sourceLineNo">511</span>            interval = 
Long.parseLong(args[i]) * 1000;<a name="line.511"></a>
 <span class="sourceLineNo">512</span>          } catch (NumberFormatException 
e) {<a name="line.512"></a>
-<span class="sourceLineNo">513</span>            System.err.println("-t needs 
a numeric value argument.");<a name="line.513"></a>
+<span class="sourceLineNo">513</span>            System.err.println("-interval 
needs a numeric value argument.");<a name="line.513"></a>
 <span class="sourceLineNo">514</span>            printUsageAndExit();<a 
name="line.514"></a>
 <span class="sourceLineNo">515</span>          }<a name="line.515"></a>
-<span class="sourceLineNo">516</span>        } else if 
(cmd.equals("-writeTable")) {<a name="line.516"></a>
-<span class="sourceLineNo">517</span>          i++;<a name="line.517"></a>
-<span class="sourceLineNo">518</span><a name="line.518"></a>
-<span class="sourceLineNo">519</span>          if (i == args.length) {<a 
name="line.519"></a>
-<span class="sourceLineNo">520</span>            
System.err.println("-writeTable needs a string value argument.");<a 
name="line.520"></a>
-<span class="sourceLineNo">521</span>            printUsageAndExit();<a 
name="line.521"></a>
-<span class="sourceLineNo">522</span>          }<a name="line.522"></a>
-<span class="sourceLineNo">523</span>          this.writeTableName = 
TableName.valueOf(args[i]);<a name="line.523"></a>
-<span class="sourceLineNo">524</span>        } else if (cmd.equals("-f")) {<a 
name="line.524"></a>
-<span class="sourceLineNo">525</span>          i++;<a name="line.525"></a>
-<span class="sourceLineNo">526</span><a name="line.526"></a>
-<span class="sourceLineNo">527</span>          if (i == args.length) {<a 
name="line.527"></a>
-<span class="sourceLineNo">528</span>            System.err<a 
name="line.528"></a>
-<span class="sourceLineNo">529</span>                .println("-f needs a 
boolean value argument (true|false).");<a name="line.529"></a>
-<span class="sourceLineNo">530</span>            printUsageAndExit();<a 
name="line.530"></a>
-<span class="sourceLineNo">531</span>          }<a name="line.531"></a>
-<span class="sourceLineNo">532</span><a name="line.532"></a>
-<span class="sourceLineNo">533</span>          this.failOnError = 
Boolean.parseBoolean(args[i]);<a name="line.533"></a>
-<span class="sourceLineNo">534</span>        } else {<a name="line.534"></a>
-<span class="sourceLineNo">535</span>          // no options match<a 
name="line.535"></a>
-<span class="sourceLineNo">536</span>          System.err.println(cmd + " 
options is invalid.");<a name="line.536"></a>
-<span class="sourceLineNo">537</span>          printUsageAndExit();<a 
name="line.537"></a>
-<span class="sourceLineNo">538</span>        }<a name="line.538"></a>
-<span class="sourceLineNo">539</span>      } else if (index &lt; 0) {<a 
name="line.539"></a>
-<span class="sourceLineNo">540</span>        // keep track of first table name 
specified by the user<a name="line.540"></a>
-<span class="sourceLineNo">541</span>        index = i;<a name="line.541"></a>
-<span class="sourceLineNo">542</span>      }<a name="line.542"></a>
-<span class="sourceLineNo">543</span>    }<a name="line.543"></a>
-<span class="sourceLineNo">544</span>    if (this.regionServerAllRegions 
&amp;&amp; !this.regionServerMode) {<a name="line.544"></a>
-<span class="sourceLineNo">545</span>      System.err.println("-allRegions can 
only be specified in regionserver mode.");<a name="line.545"></a>
-<span class="sourceLineNo">546</span>      printUsageAndExit();<a 
name="line.546"></a>
-<span class="sourceLineNo">547</span>    }<a name="line.547"></a>
-<span class="sourceLineNo">548</span>    return index;<a name="line.548"></a>
-<span class="sourceLineNo">549</span>  }<a name="line.549"></a>
+<span class="sourceLineNo">516</span>        } else 
if(cmd.equals("-regionserver")) {<a name="line.516"></a>
+<span class="sourceLineNo">517</span>          this.regionServerMode = true;<a 
name="line.517"></a>
+<span class="sourceLineNo">518</span>        } else 
if(cmd.equals("-allRegions")) {<a name="line.518"></a>
+<span class="sourceLineNo">519</span>          this.regionServerAllRegions = 
true;<a name="line.519"></a>
+<span class="sourceLineNo">520</span>        } else 
if(cmd.equals("-writeSniffing")) {<a name="line.520"></a>
+<span class="sourceLineNo">521</span>          this.writeSniffing = true;<a 
name="line.521"></a>
+<span class="sourceLineNo">522</span>        } else 
if(cmd.equals("-treatFailureAsError")) {<a name="line.522"></a>
+<span class="sourceLineNo">523</span>          this.treatFailureAsError = 
true;<a name="line.523"></a>
+<span class="sourceLineNo">524</span>        } else if (cmd.equals("-e")) {<a 
name="line.524"></a>
+<span class="sourceLineNo">525</span>          this.useRegExp = true;<a 
name="line.525"></a>
+<span class="sourceLineNo">526</span>        } else if (cmd.equals("-t")) {<a 
name="line.526"></a>
+<span class="sourceLineNo">527</span>          i++;<a name="line.527"></a>
+<span class="sourceLineNo">528</span><a name="line.528"></a>
+<span class="sourceLineNo">529</span>          if (i == args.length) {<a 
name="line.529"></a>
+<span class="sourceLineNo">530</span>            System.err.println("-t needs 
a numeric value argument.");<a name="line.530"></a>
+<span class="sourceLineNo">531</span>            printUsageAndExit();<a 
name="line.531"></a>
+<span class="sourceLineNo">532</span>          }<a name="line.532"></a>
+<span class="sourceLineNo">533</span><a name="line.533"></a>
+<span class="sourceLineNo">534</span>          try {<a name="line.534"></a>
+<span class="sourceLineNo">535</span>            this.timeout = 
Long.parseLong(args[i]);<a name="line.535"></a>
+<span class="sourceLineNo">536</span>          } catch (NumberFormatException 
e) {<a name="line.536"></a>
+<span class="sourceLineNo">537</span>            System.err.println("-t needs 
a numeric value argument.");<a name="line.537"></a>
+<span class="sourceLineNo">538</span>            printUsageAndExit();<a 
name="line.538"></a>
+<span class="sourceLineNo">539</span>          }<a name="line.539"></a>
+<span class="sourceLineNo">540</span>        } else if 
(cmd.equals("-writeTable")) {<a name="line.540"></a>
+<span class="sourceLineNo">541</span>          i++;<a name="line.541"></a>
+<span class="sourceLineNo">542</span><a name="line.542"></a>
+<span class="sourceLineNo">543</span>          if (i == args.length) {<a 
name="line.543"></a>
+<span class="sourceLineNo">544</span>            
System.err.println("-writeTable needs a string value argument.");<a 
name="line.544"></a>
+<span class="sourceLineNo">545</span>            printUsageAndExit();<a 
name="line.545"></a>
+<span class="sourceLineNo">546</span>          }<a name="line.546"></a>
+<span class="sourceLineNo">547</span>          this.writeTa

<TRUNCATED>