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From st...@apache.org
Subject svn commit: r1465198 [27/41] - in /hbase/hbase.apache.org/trunk: ./ css/ hbase-assembly/ images/ xref-test/ xref-test/org/apache/hadoop/hbase/ xref-test/org/apache/hadoop/hbase/client/ xref-test/org/apache/hadoop/hbase/client/replication/ xref-test/org...
Date Sat, 06 Apr 2013 06:06:09 GMT
Modified: hbase/hbase.apache.org/trunk/xref/org/apache/hadoop/hbase/master/snapshot/TakeSnapshotHandler.html
URL: http://svn.apache.org/viewvc/hbase/hbase.apache.org/trunk/xref/org/apache/hadoop/hbase/master/snapshot/TakeSnapshotHandler.html?rev=1465198&r1=1465197&r2=1465198&view=diff
==============================================================================
--- hbase/hbase.apache.org/trunk/xref/org/apache/hadoop/hbase/master/snapshot/TakeSnapshotHandler.html (original)
+++ hbase/hbase.apache.org/trunk/xref/org/apache/hadoop/hbase/master/snapshot/TakeSnapshotHandler.html Sat Apr  6 06:06:07 2013
@@ -51,228 +51,246 @@
 <a class="jxr_linenumber" name="41" href="#41">41</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.executor.EventHandler;
 <a class="jxr_linenumber" name="42" href="#42">42</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.executor.EventType;
 <a class="jxr_linenumber" name="43" href="#43">43</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.master.MasterServices;
-<a class="jxr_linenumber" name="44" href="#44">44</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.master.SnapshotSentinel;
-<a class="jxr_linenumber" name="45" href="#45">45</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.master.TableLockManager;
-<a class="jxr_linenumber" name="46" href="#46">46</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.master.TableLockManager.TableLock;
-<a class="jxr_linenumber" name="47" href="#47">47</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;
-<a class="jxr_linenumber" name="48" href="#48">48</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.snapshot.ClientSnapshotDescriptionUtils;
-<a class="jxr_linenumber" name="49" href="#49">49</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.snapshot.SnapshotDescriptionUtils;
-<a class="jxr_linenumber" name="50" href="#50">50</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.snapshot.TableInfoCopyTask;
-<a class="jxr_linenumber" name="51" href="#51">51</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.util.Bytes;
-<a class="jxr_linenumber" name="52" href="#52">52</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.util.Pair;
-<a class="jxr_linenumber" name="53" href="#53">53</a>  <strong class="jxr_keyword">import</strong> org.apache.zookeeper.KeeperException;
-<a class="jxr_linenumber" name="54" href="#54">54</a>  
-<a class="jxr_linenumber" name="55" href="#55">55</a>  <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="56" href="#56">56</a>  <em class="jxr_javadoccomment"> * A handler for taking snapshots from the master.</em>
-<a class="jxr_linenumber" name="57" href="#57">57</a>  <em class="jxr_javadoccomment"> *</em>
-<a class="jxr_linenumber" name="58" href="#58">58</a>  <em class="jxr_javadoccomment"> * This is not a subclass of TableEventHandler because using that would incur an extra META scan.</em>
-<a class="jxr_linenumber" name="59" href="#59">59</a>  <em class="jxr_javadoccomment"> *</em>
-<a class="jxr_linenumber" name="60" href="#60">60</a>  <em class="jxr_javadoccomment"> * The {@link #snapshotRegions(List)} call should get implemented for each snapshot flavor.</em>
-<a class="jxr_linenumber" name="61" href="#61">61</a>  <em class="jxr_javadoccomment"> */</em>
-<a class="jxr_linenumber" name="62" href="#62">62</a>  @InterfaceAudience.Private
-<a class="jxr_linenumber" name="63" href="#63">63</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/snapshot/TakeSnapshotHandler.html">TakeSnapshotHandler</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../../org/apache/hadoop/hbase/executor/EventHandler.html">EventHandler</a> <strong class="jxr_keyword">implements</strong> SnapshotSentinel,
-<a class="jxr_linenumber" name="64" href="#64">64</a>      <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html">ForeignExceptionSnare</a> {
-<a class="jxr_linenumber" name="65" href="#65">65</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Log LOG = LogFactory.getLog(TakeSnapshotHandler.<strong class="jxr_keyword">class</strong>);
-<a class="jxr_linenumber" name="66" href="#66">66</a>  
-<a class="jxr_linenumber" name="67" href="#67">67</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">boolean</strong> finished;
-<a class="jxr_linenumber" name="68" href="#68">68</a>  
-<a class="jxr_linenumber" name="69" href="#69">69</a>    <em class="jxr_comment">// none of these should ever be null</em>
-<a class="jxr_linenumber" name="70" href="#70">70</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/MasterServices.html">MasterServices</a> master;
-<a class="jxr_linenumber" name="71" href="#71">71</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> SnapshotDescription snapshot;
-<a class="jxr_linenumber" name="72" href="#72">72</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> Configuration conf;
-<a class="jxr_linenumber" name="73" href="#73">73</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> FileSystem fs;
-<a class="jxr_linenumber" name="74" href="#74">74</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> Path rootDir;
-<a class="jxr_linenumber" name="75" href="#75">75</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Path snapshotDir;
-<a class="jxr_linenumber" name="76" href="#76">76</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> Path workingDir;
-<a class="jxr_linenumber" name="77" href="#77">77</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/snapshot/MasterSnapshotVerifier.html">MasterSnapshotVerifier</a> verifier;
-<a class="jxr_linenumber" name="78" href="#78">78</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html">ForeignExceptionDispatcher</a> monitor;
-<a class="jxr_linenumber" name="79" href="#79">79</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/TableLockManager.html">TableLockManager</a> tableLockManager;
-<a class="jxr_linenumber" name="80" href="#80">80</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/TableLockManager.html">TableLock</a> tableLock;
-<a class="jxr_linenumber" name="81" href="#81">81</a>  
-<a class="jxr_linenumber" name="82" href="#82">82</a>    <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="83" href="#83">83</a>  <em class="jxr_javadoccomment">   * @param snapshot descriptor of the snapshot to take</em>
-<a class="jxr_linenumber" name="84" href="#84">84</a>  <em class="jxr_javadoccomment">   * @param masterServices master services provider</em>
-<a class="jxr_linenumber" name="85" href="#85">85</a>  <em class="jxr_javadoccomment">   * @throws IOException on unexpected error</em>
-<a class="jxr_linenumber" name="86" href="#86">86</a>  <em class="jxr_javadoccomment">   */</em>
-<a class="jxr_linenumber" name="87" href="#87">87</a>    <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/snapshot/TakeSnapshotHandler.html">TakeSnapshotHandler</a>(SnapshotDescription snapshot,
-<a class="jxr_linenumber" name="88" href="#88">88</a>        <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/MasterServices.html">MasterServices</a> masterServices) <strong class="jxr_keyword">throws</strong> IOException {
-<a class="jxr_linenumber" name="89" href="#89">89</a>      <strong class="jxr_keyword">super</strong>(masterServices, EventType.C_M_SNAPSHOT_TABLE);
-<a class="jxr_linenumber" name="90" href="#90">90</a>      assert snapshot != <strong class="jxr_keyword">null</strong> : <span class="jxr_string">"SnapshotDescription must not be nul1"</span>;
-<a class="jxr_linenumber" name="91" href="#91">91</a>      assert masterServices != <strong class="jxr_keyword">null</strong> : <span class="jxr_string">"MasterServices must not be nul1"</span>;
-<a class="jxr_linenumber" name="92" href="#92">92</a>  
-<a class="jxr_linenumber" name="93" href="#93">93</a>      <strong class="jxr_keyword">this</strong>.master = masterServices;
-<a class="jxr_linenumber" name="94" href="#94">94</a>      <strong class="jxr_keyword">this</strong>.snapshot = snapshot;
-<a class="jxr_linenumber" name="95" href="#95">95</a>      <strong class="jxr_keyword">this</strong>.conf = <strong class="jxr_keyword">this</strong>.master.getConfiguration();
-<a class="jxr_linenumber" name="96" href="#96">96</a>      <strong class="jxr_keyword">this</strong>.fs = <strong class="jxr_keyword">this</strong>.master.getMasterFileSystem().getFileSystem();
-<a class="jxr_linenumber" name="97" href="#97">97</a>      <strong class="jxr_keyword">this</strong>.rootDir = <strong class="jxr_keyword">this</strong>.master.getMasterFileSystem().getRootDir();
-<a class="jxr_linenumber" name="98" href="#98">98</a>      <strong class="jxr_keyword">this</strong>.snapshotDir = SnapshotDescriptionUtils.getCompletedSnapshotDir(snapshot, rootDir);
-<a class="jxr_linenumber" name="99" href="#99">99</a>      <strong class="jxr_keyword">this</strong>.workingDir = SnapshotDescriptionUtils.getWorkingSnapshotDir(snapshot, rootDir);
-<a class="jxr_linenumber" name="100" href="#100">100</a>     <strong class="jxr_keyword">this</strong>.monitor =  <strong class="jxr_keyword">new</strong> ForeignExceptionDispatcher();
-<a class="jxr_linenumber" name="101" href="#101">101</a> 
-<a class="jxr_linenumber" name="102" href="#102">102</a>     <strong class="jxr_keyword">this</strong>.tableLockManager = master.getTableLockManager();
-<a class="jxr_linenumber" name="103" href="#103">103</a>     <strong class="jxr_keyword">this</strong>.tableLock = <strong class="jxr_keyword">this</strong>.tableLockManager.writeLock(Bytes.toBytes(snapshot.getTable())
-<a class="jxr_linenumber" name="104" href="#104">104</a>       , EventType.C_M_SNAPSHOT_TABLE.toString());
-<a class="jxr_linenumber" name="105" href="#105">105</a> 
-<a class="jxr_linenumber" name="106" href="#106">106</a>     <em class="jxr_comment">// prepare the verify</em>
-<a class="jxr_linenumber" name="107" href="#107">107</a>     <strong class="jxr_keyword">this</strong>.verifier = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/snapshot/MasterSnapshotVerifier.html">MasterSnapshotVerifier</a>(masterServices, snapshot, rootDir);
-<a class="jxr_linenumber" name="108" href="#108">108</a>   }
-<a class="jxr_linenumber" name="109" href="#109">109</a> 
-<a class="jxr_linenumber" name="110" href="#110">110</a>   <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/apache/hadoop/hbase/HTableDescriptor.html">HTableDescriptor</a> loadTableDescriptor()
-<a class="jxr_linenumber" name="111" href="#111">111</a>       <strong class="jxr_keyword">throws</strong> FileNotFoundException, IOException {
-<a class="jxr_linenumber" name="112" href="#112">112</a>     <strong class="jxr_keyword">final</strong> String name = snapshot.getTable();
-<a class="jxr_linenumber" name="113" href="#113">113</a>     <a href="../../../../../../org/apache/hadoop/hbase/HTableDescriptor.html">HTableDescriptor</a> htd =
-<a class="jxr_linenumber" name="114" href="#114">114</a>       <strong class="jxr_keyword">this</strong>.master.getTableDescriptors().get(name);
-<a class="jxr_linenumber" name="115" href="#115">115</a>     <strong class="jxr_keyword">if</strong> (htd == <strong class="jxr_keyword">null</strong>) {
-<a class="jxr_linenumber" name="116" href="#116">116</a>       <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"HTableDescriptor missing for "</span> + name);
-<a class="jxr_linenumber" name="117" href="#117">117</a>     }
-<a class="jxr_linenumber" name="118" href="#118">118</a>     <strong class="jxr_keyword">return</strong> htd;
-<a class="jxr_linenumber" name="119" href="#119">119</a>   }
-<a class="jxr_linenumber" name="120" href="#120">120</a> 
-<a class="jxr_linenumber" name="121" href="#121">121</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/snapshot/TakeSnapshotHandler.html">TakeSnapshotHandler</a> prepare() <strong class="jxr_keyword">throws</strong> Exception {
-<a class="jxr_linenumber" name="122" href="#122">122</a>     <strong class="jxr_keyword">super</strong>.prepare();
-<a class="jxr_linenumber" name="123" href="#123">123</a>     loadTableDescriptor(); <em class="jxr_comment">// check that .tableinfo is present</em>
-<a class="jxr_linenumber" name="124" href="#124">124</a> 
-<a class="jxr_linenumber" name="125" href="#125">125</a>     <strong class="jxr_keyword">this</strong>.tableLock.acquire(); <em class="jxr_comment">//after this, you should ensure to release this lock in</em>
-<a class="jxr_linenumber" name="126" href="#126">126</a>                               <em class="jxr_comment">//case of exceptions</em>
-<a class="jxr_linenumber" name="127" href="#127">127</a>     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
+<a class="jxr_linenumber" name="44" href="#44">44</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.master.MetricsMaster;
+<a class="jxr_linenumber" name="45" href="#45">45</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.master.SnapshotSentinel;
+<a class="jxr_linenumber" name="46" href="#46">46</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.monitoring.MonitoredTask;
+<a class="jxr_linenumber" name="47" href="#47">47</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.monitoring.TaskMonitor;
+<a class="jxr_linenumber" name="48" href="#48">48</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.master.TableLockManager;
+<a class="jxr_linenumber" name="49" href="#49">49</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.master.TableLockManager.TableLock;
+<a class="jxr_linenumber" name="50" href="#50">50</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.protobuf.generated.HBaseProtos.SnapshotDescription;
+<a class="jxr_linenumber" name="51" href="#51">51</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.snapshot.ClientSnapshotDescriptionUtils;
+<a class="jxr_linenumber" name="52" href="#52">52</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.snapshot.SnapshotDescriptionUtils;
+<a class="jxr_linenumber" name="53" href="#53">53</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.snapshot.TableInfoCopyTask;
+<a class="jxr_linenumber" name="54" href="#54">54</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.util.Bytes;
+<a class="jxr_linenumber" name="55" href="#55">55</a>  <strong class="jxr_keyword">import</strong> org.apache.hadoop.hbase.util.Pair;
+<a class="jxr_linenumber" name="56" href="#56">56</a>  <strong class="jxr_keyword">import</strong> org.apache.zookeeper.KeeperException;
+<a class="jxr_linenumber" name="57" href="#57">57</a>  
+<a class="jxr_linenumber" name="58" href="#58">58</a>  <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="59" href="#59">59</a>  <em class="jxr_javadoccomment"> * A handler for taking snapshots from the master.</em>
+<a class="jxr_linenumber" name="60" href="#60">60</a>  <em class="jxr_javadoccomment"> *</em>
+<a class="jxr_linenumber" name="61" href="#61">61</a>  <em class="jxr_javadoccomment"> * This is not a subclass of TableEventHandler because using that would incur an extra META scan.</em>
+<a class="jxr_linenumber" name="62" href="#62">62</a>  <em class="jxr_javadoccomment"> *</em>
+<a class="jxr_linenumber" name="63" href="#63">63</a>  <em class="jxr_javadoccomment"> * The {@link #snapshotRegions(List)} call should get implemented for each snapshot flavor.</em>
+<a class="jxr_linenumber" name="64" href="#64">64</a>  <em class="jxr_javadoccomment"> */</em>
+<a class="jxr_linenumber" name="65" href="#65">65</a>  @InterfaceAudience.Private
+<a class="jxr_linenumber" name="66" href="#66">66</a>  <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/snapshot/TakeSnapshotHandler.html">TakeSnapshotHandler</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../../org/apache/hadoop/hbase/executor/EventHandler.html">EventHandler</a> <strong class="jxr_keyword">implements</strong> SnapshotSentinel,
+<a class="jxr_linenumber" name="67" href="#67">67</a>      <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionSnare.html">ForeignExceptionSnare</a> {
+<a class="jxr_linenumber" name="68" href="#68">68</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">static</strong> <strong class="jxr_keyword">final</strong> Log LOG = LogFactory.getLog(TakeSnapshotHandler.<strong class="jxr_keyword">class</strong>);
+<a class="jxr_linenumber" name="69" href="#69">69</a>  
+<a class="jxr_linenumber" name="70" href="#70">70</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">volatile</strong> <strong class="jxr_keyword">boolean</strong> finished;
+<a class="jxr_linenumber" name="71" href="#71">71</a>  
+<a class="jxr_linenumber" name="72" href="#72">72</a>    <em class="jxr_comment">// none of these should ever be null</em>
+<a class="jxr_linenumber" name="73" href="#73">73</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/MasterServices.html">MasterServices</a> master;
+<a class="jxr_linenumber" name="74" href="#74">74</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/MetricsMaster.html">MetricsMaster</a> metricsMaster;
+<a class="jxr_linenumber" name="75" href="#75">75</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> SnapshotDescription snapshot;
+<a class="jxr_linenumber" name="76" href="#76">76</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> Configuration conf;
+<a class="jxr_linenumber" name="77" href="#77">77</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> FileSystem fs;
+<a class="jxr_linenumber" name="78" href="#78">78</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> Path rootDir;
+<a class="jxr_linenumber" name="79" href="#79">79</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> Path snapshotDir;
+<a class="jxr_linenumber" name="80" href="#80">80</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> Path workingDir;
+<a class="jxr_linenumber" name="81" href="#81">81</a>    <strong class="jxr_keyword">private</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/snapshot/MasterSnapshotVerifier.html">MasterSnapshotVerifier</a> verifier;
+<a class="jxr_linenumber" name="82" href="#82">82</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignExceptionDispatcher.html">ForeignExceptionDispatcher</a> monitor;
+<a class="jxr_linenumber" name="83" href="#83">83</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/TableLockManager.html">TableLockManager</a> tableLockManager;
+<a class="jxr_linenumber" name="84" href="#84">84</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/TableLockManager.html">TableLock</a> tableLock;
+<a class="jxr_linenumber" name="85" href="#85">85</a>    <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/monitoring/MonitoredTask.html">MonitoredTask</a> status;
+<a class="jxr_linenumber" name="86" href="#86">86</a>  
+<a class="jxr_linenumber" name="87" href="#87">87</a>    <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="88" href="#88">88</a>  <em class="jxr_javadoccomment">   * @param snapshot descriptor of the snapshot to take</em>
+<a class="jxr_linenumber" name="89" href="#89">89</a>  <em class="jxr_javadoccomment">   * @param masterServices master services provider</em>
+<a class="jxr_linenumber" name="90" href="#90">90</a>  <em class="jxr_javadoccomment">   * @throws IOException on unexpected error</em>
+<a class="jxr_linenumber" name="91" href="#91">91</a>  <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="92" href="#92">92</a>    <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/snapshot/TakeSnapshotHandler.html">TakeSnapshotHandler</a>(SnapshotDescription snapshot, <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/MasterServices.html">MasterServices</a> masterServices,
+<a class="jxr_linenumber" name="93" href="#93">93</a>        <strong class="jxr_keyword">final</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/MetricsMaster.html">MetricsMaster</a> metricsMaster) <strong class="jxr_keyword">throws</strong> IOException {
+<a class="jxr_linenumber" name="94" href="#94">94</a>      <strong class="jxr_keyword">super</strong>(masterServices, EventType.C_M_SNAPSHOT_TABLE);
+<a class="jxr_linenumber" name="95" href="#95">95</a>      assert snapshot != <strong class="jxr_keyword">null</strong> : <span class="jxr_string">"SnapshotDescription must not be nul1"</span>;
+<a class="jxr_linenumber" name="96" href="#96">96</a>      assert masterServices != <strong class="jxr_keyword">null</strong> : <span class="jxr_string">"MasterServices must not be nul1"</span>;
+<a class="jxr_linenumber" name="97" href="#97">97</a>  
+<a class="jxr_linenumber" name="98" href="#98">98</a>      <strong class="jxr_keyword">this</strong>.master = masterServices;
+<a class="jxr_linenumber" name="99" href="#99">99</a>      <strong class="jxr_keyword">this</strong>.metricsMaster = metricsMaster;
+<a class="jxr_linenumber" name="100" href="#100">100</a>     <strong class="jxr_keyword">this</strong>.snapshot = snapshot;
+<a class="jxr_linenumber" name="101" href="#101">101</a>     <strong class="jxr_keyword">this</strong>.conf = <strong class="jxr_keyword">this</strong>.master.getConfiguration();
+<a class="jxr_linenumber" name="102" href="#102">102</a>     <strong class="jxr_keyword">this</strong>.fs = <strong class="jxr_keyword">this</strong>.master.getMasterFileSystem().getFileSystem();
+<a class="jxr_linenumber" name="103" href="#103">103</a>     <strong class="jxr_keyword">this</strong>.rootDir = <strong class="jxr_keyword">this</strong>.master.getMasterFileSystem().getRootDir();
+<a class="jxr_linenumber" name="104" href="#104">104</a>     <strong class="jxr_keyword">this</strong>.snapshotDir = SnapshotDescriptionUtils.getCompletedSnapshotDir(snapshot, rootDir);
+<a class="jxr_linenumber" name="105" href="#105">105</a>     <strong class="jxr_keyword">this</strong>.workingDir = SnapshotDescriptionUtils.getWorkingSnapshotDir(snapshot, rootDir);
+<a class="jxr_linenumber" name="106" href="#106">106</a>     <strong class="jxr_keyword">this</strong>.monitor =  <strong class="jxr_keyword">new</strong> ForeignExceptionDispatcher();
+<a class="jxr_linenumber" name="107" href="#107">107</a> 
+<a class="jxr_linenumber" name="108" href="#108">108</a>     <strong class="jxr_keyword">this</strong>.tableLockManager = master.getTableLockManager();
+<a class="jxr_linenumber" name="109" href="#109">109</a>     <strong class="jxr_keyword">this</strong>.tableLock = <strong class="jxr_keyword">this</strong>.tableLockManager.writeLock(Bytes.toBytes(snapshot.getTable())
+<a class="jxr_linenumber" name="110" href="#110">110</a>       , EventType.C_M_SNAPSHOT_TABLE.toString());
+<a class="jxr_linenumber" name="111" href="#111">111</a> 
+<a class="jxr_linenumber" name="112" href="#112">112</a>     <em class="jxr_comment">// prepare the verify</em>
+<a class="jxr_linenumber" name="113" href="#113">113</a>     <strong class="jxr_keyword">this</strong>.verifier = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/snapshot/MasterSnapshotVerifier.html">MasterSnapshotVerifier</a>(masterServices, snapshot, rootDir);
+<a class="jxr_linenumber" name="114" href="#114">114</a>     <em class="jxr_comment">// update the running tasks</em>
+<a class="jxr_linenumber" name="115" href="#115">115</a>     <strong class="jxr_keyword">this</strong>.status = TaskMonitor.get().createStatus(
+<a class="jxr_linenumber" name="116" href="#116">116</a>       <span class="jxr_string">"Taking "</span> + snapshot.getType() + <span class="jxr_string">" snapshot on table: "</span> + snapshot.getTable());
+<a class="jxr_linenumber" name="117" href="#117">117</a>   }
+<a class="jxr_linenumber" name="118" href="#118">118</a> 
+<a class="jxr_linenumber" name="119" href="#119">119</a>   <strong class="jxr_keyword">private</strong> <a href="../../../../../../org/apache/hadoop/hbase/HTableDescriptor.html">HTableDescriptor</a> loadTableDescriptor()
+<a class="jxr_linenumber" name="120" href="#120">120</a>       <strong class="jxr_keyword">throws</strong> FileNotFoundException, IOException {
+<a class="jxr_linenumber" name="121" href="#121">121</a>     <strong class="jxr_keyword">final</strong> String name = snapshot.getTable();
+<a class="jxr_linenumber" name="122" href="#122">122</a>     <a href="../../../../../../org/apache/hadoop/hbase/HTableDescriptor.html">HTableDescriptor</a> htd =
+<a class="jxr_linenumber" name="123" href="#123">123</a>       <strong class="jxr_keyword">this</strong>.master.getTableDescriptors().get(name);
+<a class="jxr_linenumber" name="124" href="#124">124</a>     <strong class="jxr_keyword">if</strong> (htd == <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="125" href="#125">125</a>       <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> IOException(<span class="jxr_string">"HTableDescriptor missing for "</span> + name);
+<a class="jxr_linenumber" name="126" href="#126">126</a>     }
+<a class="jxr_linenumber" name="127" href="#127">127</a>     <strong class="jxr_keyword">return</strong> htd;
 <a class="jxr_linenumber" name="128" href="#128">128</a>   }
 <a class="jxr_linenumber" name="129" href="#129">129</a> 
-<a class="jxr_linenumber" name="130" href="#130">130</a>   <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="131" href="#131">131</a> <em class="jxr_javadoccomment">   * Execute the core common portions of taking a snapshot. The {@link #snapshotRegions(List)}</em>
-<a class="jxr_linenumber" name="132" href="#132">132</a> <em class="jxr_javadoccomment">   * call should get implemented for each snapshot flavor.</em>
-<a class="jxr_linenumber" name="133" href="#133">133</a> <em class="jxr_javadoccomment">   */</em>
-<a class="jxr_linenumber" name="134" href="#134">134</a>   @Override
-<a class="jxr_linenumber" name="135" href="#135">135</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> process() {
-<a class="jxr_linenumber" name="136" href="#136">136</a>     LOG.info(<span class="jxr_string">"Running table snapshot operation "</span> + eventType + <span class="jxr_string">" on table "</span> + snapshot.getTable());
-<a class="jxr_linenumber" name="137" href="#137">137</a>     <strong class="jxr_keyword">try</strong> {
-<a class="jxr_linenumber" name="138" href="#138">138</a>       <em class="jxr_comment">// If regions move after this meta scan, the region specific snapshot should fail, triggering</em>
-<a class="jxr_linenumber" name="139" href="#139">139</a>       <em class="jxr_comment">// an external exception that gets captured here.</em>
-<a class="jxr_linenumber" name="140" href="#140">140</a> 
-<a class="jxr_linenumber" name="141" href="#141">141</a>       <em class="jxr_comment">// write down the snapshot info in the working directory</em>
-<a class="jxr_linenumber" name="142" href="#142">142</a>       SnapshotDescriptionUtils.writeSnapshotInfo(snapshot, workingDir, <strong class="jxr_keyword">this</strong>.fs);
-<a class="jxr_linenumber" name="143" href="#143">143</a>       <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/hadoop/hbase/snapshot/TableInfoCopyTask.html">TableInfoCopyTask</a>(monitor, snapshot, fs, rootDir).call();
-<a class="jxr_linenumber" name="144" href="#144">144</a>       monitor.rethrowException();
-<a class="jxr_linenumber" name="145" href="#145">145</a> 
-<a class="jxr_linenumber" name="146" href="#146">146</a>       List&lt;Pair&lt;HRegionInfo, ServerName&gt;&gt; regionsAndLocations =
-<a class="jxr_linenumber" name="147" href="#147">147</a>           MetaReader.getTableRegionsAndLocations(<strong class="jxr_keyword">this</strong>.server.getCatalogTracker(),
-<a class="jxr_linenumber" name="148" href="#148">148</a>             Bytes.toBytes(snapshot.getTable()), <strong class="jxr_keyword">true</strong>);
-<a class="jxr_linenumber" name="149" href="#149">149</a> 
-<a class="jxr_linenumber" name="150" href="#150">150</a>       <em class="jxr_comment">// run the snapshot</em>
-<a class="jxr_linenumber" name="151" href="#151">151</a>       snapshotRegions(regionsAndLocations);
+<a class="jxr_linenumber" name="130" href="#130">130</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/hadoop/hbase/master/snapshot/TakeSnapshotHandler.html">TakeSnapshotHandler</a> prepare() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="131" href="#131">131</a>     <strong class="jxr_keyword">super</strong>.prepare();
+<a class="jxr_linenumber" name="132" href="#132">132</a>     loadTableDescriptor(); <em class="jxr_comment">// check that .tableinfo is present</em>
+<a class="jxr_linenumber" name="133" href="#133">133</a> 
+<a class="jxr_linenumber" name="134" href="#134">134</a>     <strong class="jxr_keyword">this</strong>.tableLock.acquire(); <em class="jxr_comment">//after this, you should ensure to release this lock in</em>
+<a class="jxr_linenumber" name="135" href="#135">135</a>                               <em class="jxr_comment">//case of exceptions</em>
+<a class="jxr_linenumber" name="136" href="#136">136</a>     <strong class="jxr_keyword">return</strong> <strong class="jxr_keyword">this</strong>;
+<a class="jxr_linenumber" name="137" href="#137">137</a>   }
+<a class="jxr_linenumber" name="138" href="#138">138</a> 
+<a class="jxr_linenumber" name="139" href="#139">139</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="140" href="#140">140</a> <em class="jxr_javadoccomment">   * Execute the core common portions of taking a snapshot. The {@link #snapshotRegions(List)}</em>
+<a class="jxr_linenumber" name="141" href="#141">141</a> <em class="jxr_javadoccomment">   * call should get implemented for each snapshot flavor.</em>
+<a class="jxr_linenumber" name="142" href="#142">142</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="143" href="#143">143</a>   @Override
+<a class="jxr_linenumber" name="144" href="#144">144</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> process() {
+<a class="jxr_linenumber" name="145" href="#145">145</a>     String msg = <span class="jxr_string">"Running "</span> + snapshot.getType() + <span class="jxr_string">" table snapshot "</span> + snapshot.getName() + <span class="jxr_string">" "</span>
+<a class="jxr_linenumber" name="146" href="#146">146</a>         + eventType + <span class="jxr_string">" on table "</span> + snapshot.getTable();
+<a class="jxr_linenumber" name="147" href="#147">147</a>     LOG.info(msg);
+<a class="jxr_linenumber" name="148" href="#148">148</a>     status.setStatus(msg);
+<a class="jxr_linenumber" name="149" href="#149">149</a>     <strong class="jxr_keyword">try</strong> {
+<a class="jxr_linenumber" name="150" href="#150">150</a>       <em class="jxr_comment">// If regions move after this meta scan, the region specific snapshot should fail, triggering</em>
+<a class="jxr_linenumber" name="151" href="#151">151</a>       <em class="jxr_comment">// an external exception that gets captured here.</em>
 <a class="jxr_linenumber" name="152" href="#152">152</a> 
-<a class="jxr_linenumber" name="153" href="#153">153</a>       <em class="jxr_comment">// extract each pair to separate lists</em>
-<a class="jxr_linenumber" name="154" href="#154">154</a>       Set&lt;String&gt; serverNames = <strong class="jxr_keyword">new</strong> HashSet&lt;String&gt;();
-<a class="jxr_linenumber" name="155" href="#155">155</a>       <strong class="jxr_keyword">for</strong> (Pair&lt;HRegionInfo, ServerName&gt; p : regionsAndLocations) {
-<a class="jxr_linenumber" name="156" href="#156">156</a>         serverNames.add(p.getSecond().toString());
-<a class="jxr_linenumber" name="157" href="#157">157</a>       }
-<a class="jxr_linenumber" name="158" href="#158">158</a> 
-<a class="jxr_linenumber" name="159" href="#159">159</a>       <em class="jxr_comment">// verify the snapshot is valid</em>
-<a class="jxr_linenumber" name="160" href="#160">160</a>       verifier.verifySnapshot(<strong class="jxr_keyword">this</strong>.workingDir, serverNames);
+<a class="jxr_linenumber" name="153" href="#153">153</a>       <em class="jxr_comment">// write down the snapshot info in the working directory</em>
+<a class="jxr_linenumber" name="154" href="#154">154</a>       SnapshotDescriptionUtils.writeSnapshotInfo(snapshot, workingDir, <strong class="jxr_keyword">this</strong>.fs);
+<a class="jxr_linenumber" name="155" href="#155">155</a>       <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/hadoop/hbase/snapshot/TableInfoCopyTask.html">TableInfoCopyTask</a>(monitor, snapshot, fs, rootDir).call();
+<a class="jxr_linenumber" name="156" href="#156">156</a>       monitor.rethrowException();
+<a class="jxr_linenumber" name="157" href="#157">157</a> 
+<a class="jxr_linenumber" name="158" href="#158">158</a>       List&lt;Pair&lt;HRegionInfo, ServerName&gt;&gt; regionsAndLocations =
+<a class="jxr_linenumber" name="159" href="#159">159</a>           MetaReader.getTableRegionsAndLocations(<strong class="jxr_keyword">this</strong>.server.getCatalogTracker(),
+<a class="jxr_linenumber" name="160" href="#160">160</a>             Bytes.toBytes(snapshot.getTable()), <strong class="jxr_keyword">true</strong>);
 <a class="jxr_linenumber" name="161" href="#161">161</a> 
-<a class="jxr_linenumber" name="162" href="#162">162</a>       <em class="jxr_comment">// complete the snapshot, atomically moving from tmp to .snapshot dir.</em>
-<a class="jxr_linenumber" name="163" href="#163">163</a>       completeSnapshot(<strong class="jxr_keyword">this</strong>.snapshotDir, <strong class="jxr_keyword">this</strong>.workingDir, <strong class="jxr_keyword">this</strong>.fs);
-<a class="jxr_linenumber" name="164" href="#164">164</a>     } <strong class="jxr_keyword">catch</strong> (Exception e) {
-<a class="jxr_linenumber" name="165" href="#165">165</a>       String reason = <span class="jxr_string">"Failed taking snapshot "</span> + ClientSnapshotDescriptionUtils.toString(snapshot)
-<a class="jxr_linenumber" name="166" href="#166">166</a>           + <span class="jxr_string">" due to exception:"</span> + e.getMessage();
-<a class="jxr_linenumber" name="167" href="#167">167</a>       LOG.error(reason, e);
-<a class="jxr_linenumber" name="168" href="#168">168</a>       <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html">ForeignException</a> ee = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html">ForeignException</a>(reason, e);
-<a class="jxr_linenumber" name="169" href="#169">169</a>       monitor.receive(ee);
-<a class="jxr_linenumber" name="170" href="#170">170</a>       <em class="jxr_comment">// need to mark this completed to close off and allow cleanup to happen.</em>
-<a class="jxr_linenumber" name="171" href="#171">171</a>       cancel(<span class="jxr_string">"Failed to take snapshot '"</span> + ClientSnapshotDescriptionUtils.toString(snapshot)
-<a class="jxr_linenumber" name="172" href="#172">172</a>           + <span class="jxr_string">"' due to exception"</span>);
-<a class="jxr_linenumber" name="173" href="#173">173</a>     } <strong class="jxr_keyword">finally</strong> {
-<a class="jxr_linenumber" name="174" href="#174">174</a>       LOG.debug(<span class="jxr_string">"Launching cleanup of working dir:"</span> + workingDir);
-<a class="jxr_linenumber" name="175" href="#175">175</a>       <strong class="jxr_keyword">try</strong> {
-<a class="jxr_linenumber" name="176" href="#176">176</a>         <em class="jxr_comment">// if the working dir is still present, the snapshot has failed.  it is present we delete</em>
-<a class="jxr_linenumber" name="177" href="#177">177</a>         <em class="jxr_comment">// it.</em>
-<a class="jxr_linenumber" name="178" href="#178">178</a>         <strong class="jxr_keyword">if</strong> (fs.exists(workingDir) &amp;&amp; !<strong class="jxr_keyword">this</strong>.fs.delete(workingDir, <strong class="jxr_keyword">true</strong>)) {
-<a class="jxr_linenumber" name="179" href="#179">179</a>           LOG.error(<span class="jxr_string">"Couldn't delete snapshot working directory:"</span> + workingDir);
-<a class="jxr_linenumber" name="180" href="#180">180</a>         }
-<a class="jxr_linenumber" name="181" href="#181">181</a>       } <strong class="jxr_keyword">catch</strong> (IOException e) {
-<a class="jxr_linenumber" name="182" href="#182">182</a>         LOG.error(<span class="jxr_string">"Couldn't delete snapshot working directory:"</span> + workingDir);
-<a class="jxr_linenumber" name="183" href="#183">183</a>       }
-<a class="jxr_linenumber" name="184" href="#184">184</a>       releaseTableLock();
-<a class="jxr_linenumber" name="185" href="#185">185</a>     }
-<a class="jxr_linenumber" name="186" href="#186">186</a>   }
-<a class="jxr_linenumber" name="187" href="#187">187</a> 
-<a class="jxr_linenumber" name="188" href="#188">188</a>   <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> releaseTableLock() {
-<a class="jxr_linenumber" name="189" href="#189">189</a>     <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.tableLock != <strong class="jxr_keyword">null</strong>) {
-<a class="jxr_linenumber" name="190" href="#190">190</a>       <strong class="jxr_keyword">try</strong> {
-<a class="jxr_linenumber" name="191" href="#191">191</a>         <strong class="jxr_keyword">this</strong>.tableLock.release();
-<a class="jxr_linenumber" name="192" href="#192">192</a>       } <strong class="jxr_keyword">catch</strong> (IOException ex) {
-<a class="jxr_linenumber" name="193" href="#193">193</a>         LOG.warn(<span class="jxr_string">"Could not release the table lock"</span>, ex);
-<a class="jxr_linenumber" name="194" href="#194">194</a>       }
-<a class="jxr_linenumber" name="195" href="#195">195</a>     }
-<a class="jxr_linenumber" name="196" href="#196">196</a>   }
-<a class="jxr_linenumber" name="197" href="#197">197</a> 
-<a class="jxr_linenumber" name="198" href="#198">198</a>   <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="199" href="#199">199</a> <em class="jxr_javadoccomment">   * Reset the manager to allow another snapshot to proceed</em>
-<a class="jxr_linenumber" name="200" href="#200">200</a> <em class="jxr_javadoccomment">   *</em>
-<a class="jxr_linenumber" name="201" href="#201">201</a> <em class="jxr_javadoccomment">   * @param snapshotDir final path of the snapshot</em>
-<a class="jxr_linenumber" name="202" href="#202">202</a> <em class="jxr_javadoccomment">   * @param workingDir directory where the in progress snapshot was built</em>
-<a class="jxr_linenumber" name="203" href="#203">203</a> <em class="jxr_javadoccomment">   * @param fs {@link FileSystem} where the snapshot was built</em>
-<a class="jxr_linenumber" name="204" href="#204">204</a> <em class="jxr_javadoccomment">   * @throws SnapshotCreationException if the snapshot could not be moved</em>
-<a class="jxr_linenumber" name="205" href="#205">205</a> <em class="jxr_javadoccomment">   * @throws IOException the filesystem could not be reached</em>
-<a class="jxr_linenumber" name="206" href="#206">206</a> <em class="jxr_javadoccomment">   */</em>
-<a class="jxr_linenumber" name="207" href="#207">207</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> completeSnapshot(Path snapshotDir, Path workingDir, FileSystem fs)
-<a class="jxr_linenumber" name="208" href="#208">208</a>       <strong class="jxr_keyword">throws</strong> SnapshotCreationException, IOException {
-<a class="jxr_linenumber" name="209" href="#209">209</a>     LOG.debug(<span class="jxr_string">"Sentinel is done, just moving the snapshot from "</span> + workingDir + <span class="jxr_string">" to "</span>
-<a class="jxr_linenumber" name="210" href="#210">210</a>         + snapshotDir);
-<a class="jxr_linenumber" name="211" href="#211">211</a>     <strong class="jxr_keyword">if</strong> (!fs.rename(workingDir, snapshotDir)) {
-<a class="jxr_linenumber" name="212" href="#212">212</a>       <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/hadoop/hbase/exceptions/SnapshotCreationException.html">SnapshotCreationException</a>(<span class="jxr_string">"Failed to move working directory("</span> + workingDir
-<a class="jxr_linenumber" name="213" href="#213">213</a>           + <span class="jxr_string">") to completed directory("</span> + snapshotDir + <span class="jxr_string">")."</span>);
-<a class="jxr_linenumber" name="214" href="#214">214</a>     }
-<a class="jxr_linenumber" name="215" href="#215">215</a>     finished = <strong class="jxr_keyword">true</strong>;
-<a class="jxr_linenumber" name="216" href="#216">216</a>   }
-<a class="jxr_linenumber" name="217" href="#217">217</a> 
-<a class="jxr_linenumber" name="218" href="#218">218</a>   <em class="jxr_javadoccomment">/**</em>
-<a class="jxr_linenumber" name="219" href="#219">219</a> <em class="jxr_javadoccomment">   * Snapshot the specified regions</em>
-<a class="jxr_linenumber" name="220" href="#220">220</a> <em class="jxr_javadoccomment">   */</em>
-<a class="jxr_linenumber" name="221" href="#221">221</a>   <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">void</strong> snapshotRegions(List&lt;Pair&lt;HRegionInfo, ServerName&gt;&gt; regions)
-<a class="jxr_linenumber" name="222" href="#222">222</a>       <strong class="jxr_keyword">throws</strong> IOException, KeeperException;
-<a class="jxr_linenumber" name="223" href="#223">223</a> 
-<a class="jxr_linenumber" name="224" href="#224">224</a>   @Override
-<a class="jxr_linenumber" name="225" href="#225">225</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> cancel(String why) {
-<a class="jxr_linenumber" name="226" href="#226">226</a>     <strong class="jxr_keyword">if</strong> (finished) <strong class="jxr_keyword">return</strong>;
-<a class="jxr_linenumber" name="227" href="#227">227</a> 
-<a class="jxr_linenumber" name="228" href="#228">228</a>     <strong class="jxr_keyword">this</strong>.finished = <strong class="jxr_keyword">true</strong>;
-<a class="jxr_linenumber" name="229" href="#229">229</a>     LOG.info(<span class="jxr_string">"Stop taking snapshot="</span> + ClientSnapshotDescriptionUtils.toString(snapshot) + <span class="jxr_string">" because: "</span>
-<a class="jxr_linenumber" name="230" href="#230">230</a>         + why);
-<a class="jxr_linenumber" name="231" href="#231">231</a>     CancellationException ce = <strong class="jxr_keyword">new</strong> CancellationException(why);
-<a class="jxr_linenumber" name="232" href="#232">232</a>     monitor.receive(<strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html">ForeignException</a>(master.getServerName().toString(), ce));
-<a class="jxr_linenumber" name="233" href="#233">233</a>   }
-<a class="jxr_linenumber" name="234" href="#234">234</a> 
-<a class="jxr_linenumber" name="235" href="#235">235</a>   @Override
-<a class="jxr_linenumber" name="236" href="#236">236</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isFinished() {
-<a class="jxr_linenumber" name="237" href="#237">237</a>     <strong class="jxr_keyword">return</strong> finished;
-<a class="jxr_linenumber" name="238" href="#238">238</a>   }
-<a class="jxr_linenumber" name="239" href="#239">239</a> 
-<a class="jxr_linenumber" name="240" href="#240">240</a>   @Override
-<a class="jxr_linenumber" name="241" href="#241">241</a>   <strong class="jxr_keyword">public</strong> SnapshotDescription getSnapshot() {
-<a class="jxr_linenumber" name="242" href="#242">242</a>     <strong class="jxr_keyword">return</strong> snapshot;
-<a class="jxr_linenumber" name="243" href="#243">243</a>   }
-<a class="jxr_linenumber" name="244" href="#244">244</a> 
-<a class="jxr_linenumber" name="245" href="#245">245</a>   @Override
-<a class="jxr_linenumber" name="246" href="#246">246</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html">ForeignException</a> getExceptionIfFailed() {
-<a class="jxr_linenumber" name="247" href="#247">247</a>     <strong class="jxr_keyword">return</strong> monitor.getException();
-<a class="jxr_linenumber" name="248" href="#248">248</a>   }
-<a class="jxr_linenumber" name="249" href="#249">249</a> 
-<a class="jxr_linenumber" name="250" href="#250">250</a>   @Override
-<a class="jxr_linenumber" name="251" href="#251">251</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> rethrowException() <strong class="jxr_keyword">throws</strong> ForeignException {
-<a class="jxr_linenumber" name="252" href="#252">252</a>     monitor.rethrowException();
-<a class="jxr_linenumber" name="253" href="#253">253</a>   }
-<a class="jxr_linenumber" name="254" href="#254">254</a> 
-<a class="jxr_linenumber" name="255" href="#255">255</a>   @Override
-<a class="jxr_linenumber" name="256" href="#256">256</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> hasException() {
-<a class="jxr_linenumber" name="257" href="#257">257</a>     <strong class="jxr_keyword">return</strong> monitor.hasException();
-<a class="jxr_linenumber" name="258" href="#258">258</a>   }
-<a class="jxr_linenumber" name="259" href="#259">259</a> 
-<a class="jxr_linenumber" name="260" href="#260">260</a>   @Override
-<a class="jxr_linenumber" name="261" href="#261">261</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html">ForeignException</a> getException() {
-<a class="jxr_linenumber" name="262" href="#262">262</a>     <strong class="jxr_keyword">return</strong> monitor.getException();
-<a class="jxr_linenumber" name="263" href="#263">263</a>   }
-<a class="jxr_linenumber" name="264" href="#264">264</a> 
-<a class="jxr_linenumber" name="265" href="#265">265</a> }
+<a class="jxr_linenumber" name="162" href="#162">162</a>       <em class="jxr_comment">// run the snapshot</em>
+<a class="jxr_linenumber" name="163" href="#163">163</a>       snapshotRegions(regionsAndLocations);
+<a class="jxr_linenumber" name="164" href="#164">164</a> 
+<a class="jxr_linenumber" name="165" href="#165">165</a>       <em class="jxr_comment">// extract each pair to separate lists</em>
+<a class="jxr_linenumber" name="166" href="#166">166</a>       Set&lt;String&gt; serverNames = <strong class="jxr_keyword">new</strong> HashSet&lt;String&gt;();
+<a class="jxr_linenumber" name="167" href="#167">167</a>       <strong class="jxr_keyword">for</strong> (Pair&lt;HRegionInfo, ServerName&gt; p : regionsAndLocations) {
+<a class="jxr_linenumber" name="168" href="#168">168</a>         serverNames.add(p.getSecond().toString());
+<a class="jxr_linenumber" name="169" href="#169">169</a>       }
+<a class="jxr_linenumber" name="170" href="#170">170</a> 
+<a class="jxr_linenumber" name="171" href="#171">171</a>       <em class="jxr_comment">// verify the snapshot is valid</em>
+<a class="jxr_linenumber" name="172" href="#172">172</a>       status.setStatus(<span class="jxr_string">"Verifying snapshot: "</span> + snapshot.getName());
+<a class="jxr_linenumber" name="173" href="#173">173</a>       verifier.verifySnapshot(<strong class="jxr_keyword">this</strong>.workingDir, serverNames);
+<a class="jxr_linenumber" name="174" href="#174">174</a> 
+<a class="jxr_linenumber" name="175" href="#175">175</a>       <em class="jxr_comment">// complete the snapshot, atomically moving from tmp to .snapshot dir.</em>
+<a class="jxr_linenumber" name="176" href="#176">176</a>       completeSnapshot(<strong class="jxr_keyword">this</strong>.snapshotDir, <strong class="jxr_keyword">this</strong>.workingDir, <strong class="jxr_keyword">this</strong>.fs);
+<a class="jxr_linenumber" name="177" href="#177">177</a>       status.markComplete(<span class="jxr_string">"Snapshot "</span> + snapshot.getName() + <span class="jxr_string">" of table "</span> + snapshot.getTable()
+<a class="jxr_linenumber" name="178" href="#178">178</a>           + <span class="jxr_string">" completed"</span>);
+<a class="jxr_linenumber" name="179" href="#179">179</a>       metricsMaster.addSnapshot(status.getCompletionTimestamp() - status.getStartTime());
+<a class="jxr_linenumber" name="180" href="#180">180</a>     } <strong class="jxr_keyword">catch</strong> (Exception e) {
+<a class="jxr_linenumber" name="181" href="#181">181</a>       status.abort(<span class="jxr_string">"Failed to complete snapshot "</span> + snapshot.getName() + <span class="jxr_string">" on table "</span> +
+<a class="jxr_linenumber" name="182" href="#182">182</a>           snapshot.getTable() + <span class="jxr_string">" because "</span> + e.getMessage());
+<a class="jxr_linenumber" name="183" href="#183">183</a>       String reason = <span class="jxr_string">"Failed taking snapshot "</span> + ClientSnapshotDescriptionUtils.toString(snapshot)
+<a class="jxr_linenumber" name="184" href="#184">184</a>           + <span class="jxr_string">" due to exception:"</span> + e.getMessage();
+<a class="jxr_linenumber" name="185" href="#185">185</a>       LOG.error(reason, e);
+<a class="jxr_linenumber" name="186" href="#186">186</a>       <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html">ForeignException</a> ee = <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html">ForeignException</a>(reason, e);
+<a class="jxr_linenumber" name="187" href="#187">187</a>       monitor.receive(ee);
+<a class="jxr_linenumber" name="188" href="#188">188</a>       <em class="jxr_comment">// need to mark this completed to close off and allow cleanup to happen.</em>
+<a class="jxr_linenumber" name="189" href="#189">189</a>       cancel(<span class="jxr_string">"Failed to take snapshot '"</span> + ClientSnapshotDescriptionUtils.toString(snapshot)
+<a class="jxr_linenumber" name="190" href="#190">190</a>           + <span class="jxr_string">"' due to exception"</span>);
+<a class="jxr_linenumber" name="191" href="#191">191</a>     } <strong class="jxr_keyword">finally</strong> {
+<a class="jxr_linenumber" name="192" href="#192">192</a>       LOG.debug(<span class="jxr_string">"Launching cleanup of working dir:"</span> + workingDir);
+<a class="jxr_linenumber" name="193" href="#193">193</a>       <strong class="jxr_keyword">try</strong> {
+<a class="jxr_linenumber" name="194" href="#194">194</a>         <em class="jxr_comment">// if the working dir is still present, the snapshot has failed.  it is present we delete</em>
+<a class="jxr_linenumber" name="195" href="#195">195</a>         <em class="jxr_comment">// it.</em>
+<a class="jxr_linenumber" name="196" href="#196">196</a>         <strong class="jxr_keyword">if</strong> (fs.exists(workingDir) &amp;&amp; !<strong class="jxr_keyword">this</strong>.fs.delete(workingDir, <strong class="jxr_keyword">true</strong>)) {
+<a class="jxr_linenumber" name="197" href="#197">197</a>           LOG.error(<span class="jxr_string">"Couldn't delete snapshot working directory:"</span> + workingDir);
+<a class="jxr_linenumber" name="198" href="#198">198</a>         }
+<a class="jxr_linenumber" name="199" href="#199">199</a>       } <strong class="jxr_keyword">catch</strong> (IOException e) {
+<a class="jxr_linenumber" name="200" href="#200">200</a>         LOG.error(<span class="jxr_string">"Couldn't delete snapshot working directory:"</span> + workingDir);
+<a class="jxr_linenumber" name="201" href="#201">201</a>       }
+<a class="jxr_linenumber" name="202" href="#202">202</a>       releaseTableLock();
+<a class="jxr_linenumber" name="203" href="#203">203</a>     }
+<a class="jxr_linenumber" name="204" href="#204">204</a>   }
+<a class="jxr_linenumber" name="205" href="#205">205</a> 
+<a class="jxr_linenumber" name="206" href="#206">206</a>   <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">void</strong> releaseTableLock() {
+<a class="jxr_linenumber" name="207" href="#207">207</a>     <strong class="jxr_keyword">if</strong> (<strong class="jxr_keyword">this</strong>.tableLock != <strong class="jxr_keyword">null</strong>) {
+<a class="jxr_linenumber" name="208" href="#208">208</a>       <strong class="jxr_keyword">try</strong> {
+<a class="jxr_linenumber" name="209" href="#209">209</a>         <strong class="jxr_keyword">this</strong>.tableLock.release();
+<a class="jxr_linenumber" name="210" href="#210">210</a>       } <strong class="jxr_keyword">catch</strong> (IOException ex) {
+<a class="jxr_linenumber" name="211" href="#211">211</a>         LOG.warn(<span class="jxr_string">"Could not release the table lock"</span>, ex);
+<a class="jxr_linenumber" name="212" href="#212">212</a>       }
+<a class="jxr_linenumber" name="213" href="#213">213</a>     }
+<a class="jxr_linenumber" name="214" href="#214">214</a>   }
+<a class="jxr_linenumber" name="215" href="#215">215</a> 
+<a class="jxr_linenumber" name="216" href="#216">216</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="217" href="#217">217</a> <em class="jxr_javadoccomment">   * Reset the manager to allow another snapshot to proceed</em>
+<a class="jxr_linenumber" name="218" href="#218">218</a> <em class="jxr_javadoccomment">   *</em>
+<a class="jxr_linenumber" name="219" href="#219">219</a> <em class="jxr_javadoccomment">   * @param snapshotDir final path of the snapshot</em>
+<a class="jxr_linenumber" name="220" href="#220">220</a> <em class="jxr_javadoccomment">   * @param workingDir directory where the in progress snapshot was built</em>
+<a class="jxr_linenumber" name="221" href="#221">221</a> <em class="jxr_javadoccomment">   * @param fs {@link FileSystem} where the snapshot was built</em>
+<a class="jxr_linenumber" name="222" href="#222">222</a> <em class="jxr_javadoccomment">   * @throws SnapshotCreationException if the snapshot could not be moved</em>
+<a class="jxr_linenumber" name="223" href="#223">223</a> <em class="jxr_javadoccomment">   * @throws IOException the filesystem could not be reached</em>
+<a class="jxr_linenumber" name="224" href="#224">224</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="225" href="#225">225</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> completeSnapshot(Path snapshotDir, Path workingDir, FileSystem fs)
+<a class="jxr_linenumber" name="226" href="#226">226</a>       <strong class="jxr_keyword">throws</strong> SnapshotCreationException, IOException {
+<a class="jxr_linenumber" name="227" href="#227">227</a>     LOG.debug(<span class="jxr_string">"Sentinel is done, just moving the snapshot from "</span> + workingDir + <span class="jxr_string">" to "</span>
+<a class="jxr_linenumber" name="228" href="#228">228</a>         + snapshotDir);
+<a class="jxr_linenumber" name="229" href="#229">229</a>     <strong class="jxr_keyword">if</strong> (!fs.rename(workingDir, snapshotDir)) {
+<a class="jxr_linenumber" name="230" href="#230">230</a>       <strong class="jxr_keyword">throw</strong> <strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/hadoop/hbase/exceptions/SnapshotCreationException.html">SnapshotCreationException</a>(<span class="jxr_string">"Failed to move working directory("</span> + workingDir
+<a class="jxr_linenumber" name="231" href="#231">231</a>           + <span class="jxr_string">") to completed directory("</span> + snapshotDir + <span class="jxr_string">")."</span>);
+<a class="jxr_linenumber" name="232" href="#232">232</a>     }
+<a class="jxr_linenumber" name="233" href="#233">233</a>     finished = <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="234" href="#234">234</a>   }
+<a class="jxr_linenumber" name="235" href="#235">235</a> 
+<a class="jxr_linenumber" name="236" href="#236">236</a>   <em class="jxr_javadoccomment">/**</em>
+<a class="jxr_linenumber" name="237" href="#237">237</a> <em class="jxr_javadoccomment">   * Snapshot the specified regions</em>
+<a class="jxr_linenumber" name="238" href="#238">238</a> <em class="jxr_javadoccomment">   */</em>
+<a class="jxr_linenumber" name="239" href="#239">239</a>   <strong class="jxr_keyword">protected</strong> <strong class="jxr_keyword">abstract</strong> <strong class="jxr_keyword">void</strong> snapshotRegions(List&lt;Pair&lt;HRegionInfo, ServerName&gt;&gt; regions)
+<a class="jxr_linenumber" name="240" href="#240">240</a>       <strong class="jxr_keyword">throws</strong> IOException, KeeperException;
+<a class="jxr_linenumber" name="241" href="#241">241</a> 
+<a class="jxr_linenumber" name="242" href="#242">242</a>   @Override
+<a class="jxr_linenumber" name="243" href="#243">243</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> cancel(String why) {
+<a class="jxr_linenumber" name="244" href="#244">244</a>     <strong class="jxr_keyword">if</strong> (finished) <strong class="jxr_keyword">return</strong>;
+<a class="jxr_linenumber" name="245" href="#245">245</a> 
+<a class="jxr_linenumber" name="246" href="#246">246</a>     <strong class="jxr_keyword">this</strong>.finished = <strong class="jxr_keyword">true</strong>;
+<a class="jxr_linenumber" name="247" href="#247">247</a>     LOG.info(<span class="jxr_string">"Stop taking snapshot="</span> + ClientSnapshotDescriptionUtils.toString(snapshot) +
+<a class="jxr_linenumber" name="248" href="#248">248</a>         <span class="jxr_string">" because: "</span> + why);
+<a class="jxr_linenumber" name="249" href="#249">249</a>     CancellationException ce = <strong class="jxr_keyword">new</strong> CancellationException(why);
+<a class="jxr_linenumber" name="250" href="#250">250</a>     monitor.receive(<strong class="jxr_keyword">new</strong> <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html">ForeignException</a>(master.getServerName().toString(), ce));
+<a class="jxr_linenumber" name="251" href="#251">251</a>   }
+<a class="jxr_linenumber" name="252" href="#252">252</a> 
+<a class="jxr_linenumber" name="253" href="#253">253</a>   @Override
+<a class="jxr_linenumber" name="254" href="#254">254</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> isFinished() {
+<a class="jxr_linenumber" name="255" href="#255">255</a>     <strong class="jxr_keyword">return</strong> finished;
+<a class="jxr_linenumber" name="256" href="#256">256</a>   }
+<a class="jxr_linenumber" name="257" href="#257">257</a> 
+<a class="jxr_linenumber" name="258" href="#258">258</a>   @Override
+<a class="jxr_linenumber" name="259" href="#259">259</a>   <strong class="jxr_keyword">public</strong> SnapshotDescription getSnapshot() {
+<a class="jxr_linenumber" name="260" href="#260">260</a>     <strong class="jxr_keyword">return</strong> snapshot;
+<a class="jxr_linenumber" name="261" href="#261">261</a>   }
+<a class="jxr_linenumber" name="262" href="#262">262</a> 
+<a class="jxr_linenumber" name="263" href="#263">263</a>   @Override
+<a class="jxr_linenumber" name="264" href="#264">264</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html">ForeignException</a> getExceptionIfFailed() {
+<a class="jxr_linenumber" name="265" href="#265">265</a>     <strong class="jxr_keyword">return</strong> monitor.getException();
+<a class="jxr_linenumber" name="266" href="#266">266</a>   }
+<a class="jxr_linenumber" name="267" href="#267">267</a> 
+<a class="jxr_linenumber" name="268" href="#268">268</a>   @Override
+<a class="jxr_linenumber" name="269" href="#269">269</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> rethrowException() <strong class="jxr_keyword">throws</strong> ForeignException {
+<a class="jxr_linenumber" name="270" href="#270">270</a>     monitor.rethrowException();
+<a class="jxr_linenumber" name="271" href="#271">271</a>   }
+<a class="jxr_linenumber" name="272" href="#272">272</a> 
+<a class="jxr_linenumber" name="273" href="#273">273</a>   @Override
+<a class="jxr_linenumber" name="274" href="#274">274</a>   <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> hasException() {
+<a class="jxr_linenumber" name="275" href="#275">275</a>     <strong class="jxr_keyword">return</strong> monitor.hasException();
+<a class="jxr_linenumber" name="276" href="#276">276</a>   }
+<a class="jxr_linenumber" name="277" href="#277">277</a> 
+<a class="jxr_linenumber" name="278" href="#278">278</a>   @Override
+<a class="jxr_linenumber" name="279" href="#279">279</a>   <strong class="jxr_keyword">public</strong> <a href="../../../../../../org/apache/hadoop/hbase/errorhandling/ForeignException.html">ForeignException</a> getException() {
+<a class="jxr_linenumber" name="280" href="#280">280</a>     <strong class="jxr_keyword">return</strong> monitor.getException();
+<a class="jxr_linenumber" name="281" href="#281">281</a>   }
+<a class="jxr_linenumber" name="282" href="#282">282</a> 
+<a class="jxr_linenumber" name="283" href="#283">283</a> }
 </pre>
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