http://git-wip-us.apache.org/repos/asf/hbase-site/blob/58f51408/devapidocs/src-html/org/apache/hadoop/hbase/client/PreemptiveFastFailInterceptor.html
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diff --git 
a/devapidocs/src-html/org/apache/hadoop/hbase/client/PreemptiveFastFailInterceptor.html
 
b/devapidocs/src-html/org/apache/hadoop/hbase/client/PreemptiveFastFailInterceptor.html
index ce13124..4a62e5a 100644
--- 
a/devapidocs/src-html/org/apache/hadoop/hbase/client/PreemptiveFastFailInterceptor.html
+++ 
b/devapidocs/src-html/org/apache/hadoop/hbase/client/PreemptiveFastFailInterceptor.html
@@ -25,392 +25,345 @@
 <span class="sourceLineNo">017</span> */<a name="line.17"></a>
 <span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.client;<a 
name="line.18"></a>
 <span class="sourceLineNo">019</span><a name="line.19"></a>
-<span class="sourceLineNo">020</span>import java.io.EOFException;<a 
name="line.20"></a>
-<span class="sourceLineNo">021</span>import java.io.IOException;<a 
name="line.21"></a>
-<span class="sourceLineNo">022</span>import java.io.SyncFailedException;<a 
name="line.22"></a>
-<span class="sourceLineNo">023</span>import 
java.lang.reflect.UndeclaredThrowableException;<a name="line.23"></a>
-<span class="sourceLineNo">024</span>import java.net.ConnectException;<a 
name="line.24"></a>
-<span class="sourceLineNo">025</span>import java.net.SocketTimeoutException;<a 
name="line.25"></a>
-<span class="sourceLineNo">026</span>import 
java.nio.channels.ClosedChannelException;<a name="line.26"></a>
-<span class="sourceLineNo">027</span>import java.util.Map.Entry;<a 
name="line.27"></a>
-<span class="sourceLineNo">028</span>import 
java.util.concurrent.ConcurrentHashMap;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import 
java.util.concurrent.ConcurrentMap;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import 
java.util.concurrent.TimeoutException;<a name="line.30"></a>
-<span class="sourceLineNo">031</span><a name="line.31"></a>
-<span class="sourceLineNo">032</span>import 
org.apache.commons.lang.mutable.MutableBoolean;<a name="line.32"></a>
-<span class="sourceLineNo">033</span>import org.apache.commons.logging.Log;<a 
name="line.33"></a>
-<span class="sourceLineNo">034</span>import 
org.apache.commons.logging.LogFactory;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import 
org.apache.hadoop.conf.Configuration;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import 
org.apache.hadoop.hbase.DoNotRetryIOException;<a name="line.36"></a>
-<span class="sourceLineNo">037</span>import 
org.apache.hadoop.hbase.HConstants;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import 
org.apache.hadoop.hbase.ServerName;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import 
org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import 
org.apache.hadoop.hbase.exceptions.ConnectionClosingException;<a 
name="line.40"></a>
-<span class="sourceLineNo">041</span>import 
org.apache.hadoop.hbase.exceptions.PreemptiveFastFailException;<a 
name="line.41"></a>
-<span class="sourceLineNo">042</span>import 
org.apache.hadoop.hbase.ipc.FailedServerException;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import 
org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import 
org.apache.hadoop.ipc.RemoteException;<a name="line.44"></a>
-<span class="sourceLineNo">045</span><a name="line.45"></a>
-<span class="sourceLineNo">046</span>/**<a name="line.46"></a>
-<span class="sourceLineNo">047</span> * <a name="line.47"></a>
-<span class="sourceLineNo">048</span> * The concrete {@link 
RetryingCallerInterceptor} class that implements the preemptive fast fail<a 
name="line.48"></a>
-<span class="sourceLineNo">049</span> * feature.<a name="line.49"></a>
-<span class="sourceLineNo">050</span> * <a name="line.50"></a>
-<span class="sourceLineNo">051</span> * The motivation is as follows : <a 
name="line.51"></a>
-<span class="sourceLineNo">052</span> * In case where a large number of 
clients try and talk to a particular region server in hbase, if<a 
name="line.52"></a>
-<span class="sourceLineNo">053</span> * the region server goes down due to 
network problems, we might end up in a scenario where<a name="line.53"></a>
-<span class="sourceLineNo">054</span> * the clients would go into a state 
where they all start to retry.<a name="line.54"></a>
-<span class="sourceLineNo">055</span> * This behavior will set off many of the 
threads in pretty much the same path and they all would be<a name="line.55"></a>
-<span class="sourceLineNo">056</span> * sleeping giving rise to a state where 
the client either needs to create more threads to send new<a name="line.56"></a>
-<span class="sourceLineNo">057</span> * requests to other hbase machines or 
block because the client cannot create anymore threads.<a name="line.57"></a>
-<span class="sourceLineNo">058</span> * <a name="line.58"></a>
-<span class="sourceLineNo">059</span> * In most cases the clients might prefer 
to have a bound on the number of threads that are created<a name="line.59"></a>
-<span class="sourceLineNo">060</span> * in order to send requests to hbase. 
This would mostly result in the client thread starvation.<a name="line.60"></a>
-<span class="sourceLineNo">061</span> * <a name="line.61"></a>
-<span class="sourceLineNo">062</span> *  To circumvent this problem, the 
approach that is being taken here under is to let 1 of the many<a 
name="line.62"></a>
-<span class="sourceLineNo">063</span> *  threads who are trying to contact the 
regionserver with connection problems and let the other<a name="line.63"></a>
-<span class="sourceLineNo">064</span> *  threads get a {@link 
PreemptiveFastFailException} so that they can move on and take other<a 
name="line.64"></a>
-<span class="sourceLineNo">065</span> *  requests.<a name="line.65"></a>
-<span class="sourceLineNo">066</span> *  <a name="line.66"></a>
-<span class="sourceLineNo">067</span> *  This would give the client more 
flexibility on the kind of action he would want to take in cases<a 
name="line.67"></a>
-<span class="sourceLineNo">068</span> *  where the regionserver is down. He 
can either discard the requests and send a nack upstream<a name="line.68"></a>
-<span class="sourceLineNo">069</span> *  faster or have an application level 
retry or buffer the requests up so as to send them down to<a name="line.69"></a>
-<span class="sourceLineNo">070</span> *  hbase later.<a name="line.70"></a>
-<span class="sourceLineNo">071</span> *<a name="line.71"></a>
-<span class="sourceLineNo">072</span> */<a name="line.72"></a>
-<span class="sourceLineNo">073</span>@InterfaceAudience.Private<a 
name="line.73"></a>
-<span class="sourceLineNo">074</span>class PreemptiveFastFailInterceptor 
extends RetryingCallerInterceptor {<a name="line.74"></a>
-<span class="sourceLineNo">075</span><a name="line.75"></a>
-<span class="sourceLineNo">076</span>  private static final Log LOG = 
LogFactory<a name="line.76"></a>
-<span class="sourceLineNo">077</span>      
.getLog(PreemptiveFastFailInterceptor.class);<a name="line.77"></a>
-<span class="sourceLineNo">078</span><a name="line.78"></a>
-<span class="sourceLineNo">079</span>  // amount of time to wait before we 
consider a server to be in fast fail<a name="line.79"></a>
-<span class="sourceLineNo">080</span>  // mode<a name="line.80"></a>
-<span class="sourceLineNo">081</span>  protected final long 
fastFailThresholdMilliSec;<a name="line.81"></a>
-<span class="sourceLineNo">082</span><a name="line.82"></a>
-<span class="sourceLineNo">083</span>  // Keeps track of failures when we 
cannot talk to a server. Helps in<a name="line.83"></a>
-<span class="sourceLineNo">084</span>  // fast failing clients if the server 
is down for a long time.<a name="line.84"></a>
-<span class="sourceLineNo">085</span>  protected final 
ConcurrentMap&lt;ServerName, FailureInfo&gt; repeatedFailuresMap =<a 
name="line.85"></a>
-<span class="sourceLineNo">086</span>      new 
ConcurrentHashMap&lt;ServerName, FailureInfo&gt;();<a name="line.86"></a>
-<span class="sourceLineNo">087</span><a name="line.87"></a>
-<span class="sourceLineNo">088</span>  // We populate repeatedFailuresMap 
every time there is a failure. So, to<a name="line.88"></a>
-<span class="sourceLineNo">089</span>  // keep it from growing unbounded, we 
garbage collect the failure information<a name="line.89"></a>
-<span class="sourceLineNo">090</span>  // every cleanupInterval.<a 
name="line.90"></a>
-<span class="sourceLineNo">091</span>  protected final long 
failureMapCleanupIntervalMilliSec;<a name="line.91"></a>
-<span class="sourceLineNo">092</span><a name="line.92"></a>
-<span class="sourceLineNo">093</span>  protected volatile long 
lastFailureMapCleanupTimeMilliSec;<a name="line.93"></a>
-<span class="sourceLineNo">094</span><a name="line.94"></a>
-<span class="sourceLineNo">095</span>  // clear failure Info. Used to clean 
out all entries.<a name="line.95"></a>
-<span class="sourceLineNo">096</span>  // A safety valve, in case the client 
does not exit the<a name="line.96"></a>
-<span class="sourceLineNo">097</span>  // fast fail mode for any reason.<a 
name="line.97"></a>
-<span class="sourceLineNo">098</span>  private long 
fastFailClearingTimeMilliSec;<a name="line.98"></a>
-<span class="sourceLineNo">099</span><a name="line.99"></a>
-<span class="sourceLineNo">100</span>  private final 
ThreadLocal&lt;MutableBoolean&gt; threadRetryingInFastFailMode =<a 
name="line.100"></a>
-<span class="sourceLineNo">101</span>      new 
ThreadLocal&lt;MutableBoolean&gt;();<a name="line.101"></a>
-<span class="sourceLineNo">102</span><a name="line.102"></a>
-<span class="sourceLineNo">103</span>  public 
PreemptiveFastFailInterceptor(Configuration conf) {<a name="line.103"></a>
-<span class="sourceLineNo">104</span>    this.fastFailThresholdMilliSec = 
conf.getLong(<a name="line.104"></a>
-<span class="sourceLineNo">105</span>        
HConstants.HBASE_CLIENT_FAST_FAIL_THREASHOLD_MS,<a name="line.105"></a>
-<span class="sourceLineNo">106</span>        
HConstants.HBASE_CLIENT_FAST_FAIL_THREASHOLD_MS_DEFAULT);<a name="line.106"></a>
-<span class="sourceLineNo">107</span>    
this.failureMapCleanupIntervalMilliSec = conf.getLong(<a name="line.107"></a>
-<span class="sourceLineNo">108</span>        
HConstants.HBASE_CLIENT_FAST_FAIL_CLEANUP_MS_DURATION_MS,<a name="line.108"></a>
-<span class="sourceLineNo">109</span>        
HConstants.HBASE_CLIENT_FAST_FAIL_CLEANUP_DURATION_MS_DEFAULT);<a 
name="line.109"></a>
-<span class="sourceLineNo">110</span>    lastFailureMapCleanupTimeMilliSec = 
EnvironmentEdgeManager.currentTime();<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>  public void 
intercept(FastFailInterceptorContext context)<a name="line.113"></a>
-<span class="sourceLineNo">114</span>      throws PreemptiveFastFailException 
{<a name="line.114"></a>
-<span class="sourceLineNo">115</span>    
context.setFailureInfo(repeatedFailuresMap.get(context.getServer()));<a 
name="line.115"></a>
-<span class="sourceLineNo">116</span>    if 
(inFastFailMode(context.getServer()) &amp;&amp; !currentThreadInFastFailMode()) 
{<a name="line.116"></a>
-<span class="sourceLineNo">117</span>      // In Fast-fail mode, all but one 
thread will fast fail. Check<a name="line.117"></a>
-<span class="sourceLineNo">118</span>      // if we are that one chosen 
thread.<a name="line.118"></a>
-<span class="sourceLineNo">119</span>      
context.setRetryDespiteFastFailMode(shouldRetryInspiteOfFastFail(context<a 
name="line.119"></a>
-<span class="sourceLineNo">120</span>          .getFailureInfo()));<a 
name="line.120"></a>
-<span class="sourceLineNo">121</span>      if 
(!context.isRetryDespiteFastFailMode()) { // we don't have to retry<a 
name="line.121"></a>
-<span class="sourceLineNo">122</span>        LOG.debug("Throwing PFFE : " + 
context.getFailureInfo() + " tries : "<a name="line.122"></a>
-<span class="sourceLineNo">123</span>            + context.getTries());<a 
name="line.123"></a>
-<span class="sourceLineNo">124</span>        throw new 
PreemptiveFastFailException(<a name="line.124"></a>
-<span class="sourceLineNo">125</span>            
context.getFailureInfo().numConsecutiveFailures.get(),<a name="line.125"></a>
-<span class="sourceLineNo">126</span>            
context.getFailureInfo().timeOfFirstFailureMilliSec,<a name="line.126"></a>
-<span class="sourceLineNo">127</span>            
context.getFailureInfo().timeOfLatestAttemptMilliSec, context.getServer());<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>    context.setDidTry(true);<a 
name="line.130"></a>
-<span class="sourceLineNo">131</span>  }<a name="line.131"></a>
-<span class="sourceLineNo">132</span><a name="line.132"></a>
-<span class="sourceLineNo">133</span>  public void 
handleFailure(FastFailInterceptorContext context,<a name="line.133"></a>
-<span class="sourceLineNo">134</span>      Throwable t) throws IOException {<a 
name="line.134"></a>
-<span class="sourceLineNo">135</span>    handleThrowable(t, 
context.getServer(),<a name="line.135"></a>
-<span class="sourceLineNo">136</span>        
context.getCouldNotCommunicateWithServer());<a name="line.136"></a>
-<span class="sourceLineNo">137</span>  }<a name="line.137"></a>
-<span class="sourceLineNo">138</span><a name="line.138"></a>
-<span class="sourceLineNo">139</span>  public void 
updateFailureInfo(FastFailInterceptorContext context) {<a name="line.139"></a>
-<span class="sourceLineNo">140</span>    
updateFailureInfoForServer(context.getServer(), context.getFailureInfo(),<a 
name="line.140"></a>
-<span class="sourceLineNo">141</span>        context.didTry(), 
context.getCouldNotCommunicateWithServer()<a name="line.141"></a>
-<span class="sourceLineNo">142</span>            .booleanValue(), 
context.isRetryDespiteFastFailMode());<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>  /**<a name="line.145"></a>
-<span class="sourceLineNo">146</span>   * Handles failures encountered when 
communicating with a server.<a name="line.146"></a>
-<span class="sourceLineNo">147</span>   *<a name="line.147"></a>
-<span class="sourceLineNo">148</span>   * Updates the FailureInfo in 
repeatedFailuresMap to reflect the failure.<a name="line.148"></a>
-<span class="sourceLineNo">149</span>   * Throws RepeatedConnectException if 
the client is in Fast fail mode.<a name="line.149"></a>
-<span class="sourceLineNo">150</span>   *<a name="line.150"></a>
-<span class="sourceLineNo">151</span>   * @param serverName<a 
name="line.151"></a>
-<span class="sourceLineNo">152</span>   * @param t<a name="line.152"></a>
-<span class="sourceLineNo">153</span>   *          - the throwable to be 
handled.<a name="line.153"></a>
-<span class="sourceLineNo">154</span>   * @throws 
PreemptiveFastFailException<a name="line.154"></a>
-<span class="sourceLineNo">155</span>   */<a name="line.155"></a>
-<span class="sourceLineNo">156</span>  private void 
handleFailureToServer(ServerName serverName, Throwable t) {<a 
name="line.156"></a>
-<span class="sourceLineNo">157</span>    if (serverName == null || t == null) 
{<a name="line.157"></a>
-<span class="sourceLineNo">158</span>      return;<a name="line.158"></a>
-<span class="sourceLineNo">159</span>    }<a name="line.159"></a>
-<span class="sourceLineNo">160</span>    long currentTime = 
EnvironmentEdgeManager.currentTime();<a name="line.160"></a>
-<span class="sourceLineNo">161</span>    FailureInfo fInfo = 
repeatedFailuresMap.get(serverName);<a name="line.161"></a>
-<span class="sourceLineNo">162</span>    if (fInfo == null) {<a 
name="line.162"></a>
-<span class="sourceLineNo">163</span>      fInfo = new 
FailureInfo(currentTime);<a name="line.163"></a>
-<span class="sourceLineNo">164</span>      FailureInfo oldfInfo = 
repeatedFailuresMap.putIfAbsent(serverName, fInfo);<a name="line.164"></a>
-<span class="sourceLineNo">165</span><a name="line.165"></a>
-<span class="sourceLineNo">166</span>      if (oldfInfo != null) {<a 
name="line.166"></a>
-<span class="sourceLineNo">167</span>        fInfo = oldfInfo;<a 
name="line.167"></a>
-<span class="sourceLineNo">168</span>      }<a name="line.168"></a>
-<span class="sourceLineNo">169</span>    }<a name="line.169"></a>
-<span class="sourceLineNo">170</span>    fInfo.timeOfLatestAttemptMilliSec = 
currentTime;<a name="line.170"></a>
-<span class="sourceLineNo">171</span>    
fInfo.numConsecutiveFailures.incrementAndGet();<a name="line.171"></a>
-<span class="sourceLineNo">172</span>  }<a name="line.172"></a>
-<span class="sourceLineNo">173</span><a name="line.173"></a>
-<span class="sourceLineNo">174</span>  public void handleThrowable(Throwable 
t1, ServerName serverName,<a name="line.174"></a>
-<span class="sourceLineNo">175</span>      MutableBoolean 
couldNotCommunicateWithServer) throws IOException {<a name="line.175"></a>
-<span class="sourceLineNo">176</span>    Throwable t2 = 
translateException(t1);<a name="line.176"></a>
-<span class="sourceLineNo">177</span>    boolean isLocalException = !(t2 
instanceof RemoteException);<a name="line.177"></a>
-<span class="sourceLineNo">178</span>    if (isLocalException &amp;&amp; 
isConnectionException(t2)) {<a name="line.178"></a>
+<span class="sourceLineNo">020</span>import java.io.IOException;<a 
name="line.20"></a>
+<span class="sourceLineNo">021</span>import java.util.Map.Entry;<a 
name="line.21"></a>
+<span class="sourceLineNo">022</span>import 
java.util.concurrent.ConcurrentHashMap;<a name="line.22"></a>
+<span class="sourceLineNo">023</span>import 
java.util.concurrent.ConcurrentMap;<a name="line.23"></a>
+<span class="sourceLineNo">024</span><a name="line.24"></a>
+<span class="sourceLineNo">025</span>import 
org.apache.commons.lang.mutable.MutableBoolean;<a name="line.25"></a>
+<span class="sourceLineNo">026</span>import org.apache.commons.logging.Log;<a 
name="line.26"></a>
+<span class="sourceLineNo">027</span>import 
org.apache.commons.logging.LogFactory;<a name="line.27"></a>
+<span class="sourceLineNo">028</span>import 
org.apache.hadoop.conf.Configuration;<a name="line.28"></a>
+<span class="sourceLineNo">029</span>import 
org.apache.hadoop.hbase.HConstants;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import 
org.apache.hadoop.hbase.ServerName;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import 
org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import 
org.apache.hadoop.hbase.exceptions.ClientExceptionsUtil;<a name="line.32"></a>
+<span class="sourceLineNo">033</span>import 
org.apache.hadoop.hbase.exceptions.PreemptiveFastFailException;<a 
name="line.33"></a>
+<span class="sourceLineNo">034</span>import 
org.apache.hadoop.hbase.ipc.CallTimeoutException;<a name="line.34"></a>
+<span class="sourceLineNo">035</span>import 
org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.35"></a>
+<span class="sourceLineNo">036</span>import 
org.apache.hadoop.ipc.RemoteException;<a name="line.36"></a>
+<span class="sourceLineNo">037</span><a name="line.37"></a>
+<span class="sourceLineNo">038</span>import 
com.google.common.annotations.VisibleForTesting;<a name="line.38"></a>
+<span class="sourceLineNo">039</span><a name="line.39"></a>
+<span class="sourceLineNo">040</span>/**<a name="line.40"></a>
+<span class="sourceLineNo">041</span> * <a name="line.41"></a>
+<span class="sourceLineNo">042</span> * The concrete {@link 
RetryingCallerInterceptor} class that implements the preemptive fast fail<a 
name="line.42"></a>
+<span class="sourceLineNo">043</span> * feature.<a name="line.43"></a>
+<span class="sourceLineNo">044</span> * <a name="line.44"></a>
+<span class="sourceLineNo">045</span> * The motivation is as follows : <a 
name="line.45"></a>
+<span class="sourceLineNo">046</span> * In case where a large number of 
clients try and talk to a particular region server in hbase, if<a 
name="line.46"></a>
+<span class="sourceLineNo">047</span> * the region server goes down due to 
network problems, we might end up in a scenario where<a name="line.47"></a>
+<span class="sourceLineNo">048</span> * the clients would go into a state 
where they all start to retry.<a name="line.48"></a>
+<span class="sourceLineNo">049</span> * This behavior will set off many of the 
threads in pretty much the same path and they all would be<a name="line.49"></a>
+<span class="sourceLineNo">050</span> * sleeping giving rise to a state where 
the client either needs to create more threads to send new<a name="line.50"></a>
+<span class="sourceLineNo">051</span> * requests to other hbase machines or 
block because the client cannot create anymore threads.<a name="line.51"></a>
+<span class="sourceLineNo">052</span> * <a name="line.52"></a>
+<span class="sourceLineNo">053</span> * In most cases the clients might prefer 
to have a bound on the number of threads that are created<a name="line.53"></a>
+<span class="sourceLineNo">054</span> * in order to send requests to hbase. 
This would mostly result in the client thread starvation.<a name="line.54"></a>
+<span class="sourceLineNo">055</span> * <a name="line.55"></a>
+<span class="sourceLineNo">056</span> *  To circumvent this problem, the 
approach that is being taken here under is to let 1 of the many<a 
name="line.56"></a>
+<span class="sourceLineNo">057</span> *  threads who are trying to contact the 
regionserver with connection problems and let the other<a name="line.57"></a>
+<span class="sourceLineNo">058</span> *  threads get a {@link 
PreemptiveFastFailException} so that they can move on and take other<a 
name="line.58"></a>
+<span class="sourceLineNo">059</span> *  requests.<a name="line.59"></a>
+<span class="sourceLineNo">060</span> *  <a name="line.60"></a>
+<span class="sourceLineNo">061</span> *  This would give the client more 
flexibility on the kind of action he would want to take in cases<a 
name="line.61"></a>
+<span class="sourceLineNo">062</span> *  where the regionserver is down. He 
can either discard the requests and send a nack upstream<a name="line.62"></a>
+<span class="sourceLineNo">063</span> *  faster or have an application level 
retry or buffer the requests up so as to send them down to<a name="line.63"></a>
+<span class="sourceLineNo">064</span> *  hbase later.<a name="line.64"></a>
+<span class="sourceLineNo">065</span> *<a name="line.65"></a>
+<span class="sourceLineNo">066</span> */<a name="line.66"></a>
+<span class="sourceLineNo">067</span>@InterfaceAudience.Private<a 
name="line.67"></a>
+<span class="sourceLineNo">068</span>class PreemptiveFastFailInterceptor 
extends RetryingCallerInterceptor {<a name="line.68"></a>
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+<span class="sourceLineNo">305</span>      LOG.info("Clearing out PFFE for 
server " + server.getServerName());<a name="line.305"></a>
+<span class="sourceLineNo">306</span>      
repeatedFailuresMap.remove(server);<a name="line.306"></a>
+<span class="sourceLineNo">307</span>    } else {<a name="line.307"></a>
+<span class="sourceLineNo">308</span>      // update time of last attempt<a 
name="line.308"></a>
+<span class="sourceLineNo">309</span>      long currentTime = 
System.currentTimeMillis();<a name="line.309"></a>
+<span class="sourceLineNo">310</span>      fInfo.timeOfLatestAttemptMilliSec = 
currentTime;<a name="line.310"></a>
+<span class="sourceLineNo">311</span><a name="line.311"></a>
+<span class="sourceLineNo">312</span>      // Release the lock if we were 
retrying inspite of FastFail<a name="line.312"></a>
+<span class="sourceLineNo">313</span>      if (retryDespiteFastFailMode) {<a 
name="line.313"></a>
+<span class="sourceLineNo">314</span>        
fInfo.exclusivelyRetringInspiteOfFastFail.set(false);<a name="line.314"></a>
+<span class="sourceLineNo">315</span>        
threadRetryingInFastFailMode.get().setValue(false);<a name="line.315"></a>
+<span class="sourceLineNo">316</span>      }<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>    
occasionallyCleanupFailureInformation();<a name="line.319"></a>
+<span class="sourceLineNo">320</span>  }<a name="line.320"></a>
+<span class="sourceLineNo">321</span><a name="line.321"></a>
+<span class="sourceLineNo">322</span>  @Override<a name="line.322"></a>
+<span class="sourceLineNo">323</span>  public void 
intercept(RetryingCallerInterceptorContext context)<a name="line.323"></a>
+<span class="sourceLineNo">324</span>      throws PreemptiveFastFailException 
{<a name="line.324"></a>
+<span class="sourceLineNo">325</span>    if (context instanceof 
FastFailInterceptorContext) {<a name="line.325"></a>
+<span class="sourceLineNo">326</span>      
intercept((FastFailInterceptorContext) context);<a name="line.326"></a>
+<span class="sourceLineNo">327</span>    }<a name="line.327"></a>
+<span class="sourceLineNo">328</span>  }<a name="line.328"></a>
+<span class="sourceLineNo">329</span><a name="line.329"></a>
+<span class="sourceLineNo">330</span>  @Override<a name="line.330"></a>
+<span class="sourceLineNo">331</span>  public void 
handleFailure(RetryingCallerInterceptorContext context,<a name="line.331"></a>
+<span class="sourceLineNo">332</span>      Throwable t) throws IOException {<a 
name="line.332"></a>
+<span class="sourceLineNo">333</span>    if (context instanceof 
FastFailInterceptorContext) {<a name="line.333"></a>
+<span class="sourceLineNo">334</span>      
handleFailure((FastFailInterceptorContext) context, t);<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><a name="line.337"></a>
+<span class="sourceLineNo">338</span>  @Override<a name="line.338"></a>
+<span class="sourceLineNo">339</span>  public void 
updateFailureInfo(RetryingCallerInterceptorContext context) {<a 
name="line.339"></a>
+<span class="sourceLineNo">340</span>    if (context instanceof 
FastFailInterceptorContext) {<a name="line.340"></a>
+<span class="sourceLineNo">341</span>      
updateFailureInfo((FastFailInterceptorContext) context);<a name="line.341"></a>
+<span class="sourceLineNo">342</span>    }<a name="line.342"></a>
+<span class="sourceLineNo">343</span>  }<a name="line.343"></a>
+<span class="sourceLineNo">344</span><a name="line.344"></a>
+<span class="sourceLineNo">345</span>  @Override<a name="line.345"></a>
+<span class="sourceLineNo">346</span>  public RetryingCallerInterceptorContext 
createEmptyContext() {<a name="line.346"></a>
+<span class="sourceLineNo">347</span>    return new 
FastFailInterceptorContext();<a name="line.347"></a>
+<span class="sourceLineNo">348</span>  }<a name="line.348"></a>
+<span class="sourceLineNo">349</span><a name="line.349"></a>
+<span class="sourceLineNo">350</span>  protected boolean 
isServerInFailureMap(ServerName serverName) {<a name="line.350"></a>
+<span class="sourceLineNo">351</span>    return 
this.repeatedFailuresMap.containsKey(serverName);<a name="line.351"></a>
+<span class="sourceLineNo">352</span>  }<a name="line.352"></a>
+<span class="sourceLineNo">353</span><a name="line.353"></a>
+<span class="sourceLineNo">354</span>  @Override<a name="line.354"></a>
+<span class="sourceLineNo">355</span>  public String toString() {<a 
name="line.355"></a>
+<span class="sourceLineNo">356</span>    return 
"PreemptiveFastFailInterceptor";<a name="line.356"></a>
+<span class="sourceLineNo">357</span>  }<a name="line.357"></a>
+<span class="sourceLineNo">358</span>}<a name="line.358"></a>
 
 
 

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