You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2018/09/12 14:54:40 UTC
[39/49] hbase-site git commit: Published site at
3810ba2c6edfc531181ffc9e6c68396a0c2d2027.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/705d69c4/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/DisabledTableSnapshotHandler.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/DisabledTableSnapshotHandler.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/DisabledTableSnapshotHandler.html
index 9c02160..80ce868 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/DisabledTableSnapshotHandler.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/DisabledTableSnapshotHandler.html
@@ -62,72 +62,75 @@
<span class="sourceLineNo">054</span> /**<a name="line.54"></a>
<span class="sourceLineNo">055</span> * @param snapshot descriptor of the snapshot to take<a name="line.55"></a>
<span class="sourceLineNo">056</span> * @param masterServices master services provider<a name="line.56"></a>
-<span class="sourceLineNo">057</span> */<a name="line.57"></a>
-<span class="sourceLineNo">058</span> public DisabledTableSnapshotHandler(SnapshotDescription snapshot,<a name="line.58"></a>
-<span class="sourceLineNo">059</span> final MasterServices masterServices, final SnapshotManager snapshotManager) {<a name="line.59"></a>
-<span class="sourceLineNo">060</span> super(snapshot, masterServices, snapshotManager);<a name="line.60"></a>
-<span class="sourceLineNo">061</span> }<a name="line.61"></a>
-<span class="sourceLineNo">062</span><a name="line.62"></a>
-<span class="sourceLineNo">063</span> @Override<a name="line.63"></a>
-<span class="sourceLineNo">064</span> public DisabledTableSnapshotHandler prepare() throws Exception {<a name="line.64"></a>
-<span class="sourceLineNo">065</span> return (DisabledTableSnapshotHandler) super.prepare();<a name="line.65"></a>
-<span class="sourceLineNo">066</span> }<a name="line.66"></a>
-<span class="sourceLineNo">067</span><a name="line.67"></a>
-<span class="sourceLineNo">068</span> // TODO consider parallelizing these operations since they are independent. Right now its just<a name="line.68"></a>
-<span class="sourceLineNo">069</span> // easier to keep them serial though<a name="line.69"></a>
-<span class="sourceLineNo">070</span> @Override<a name="line.70"></a>
-<span class="sourceLineNo">071</span> public void snapshotRegions(List<Pair<RegionInfo, ServerName>> regionsAndLocations)<a name="line.71"></a>
-<span class="sourceLineNo">072</span> throws IOException, KeeperException {<a name="line.72"></a>
-<span class="sourceLineNo">073</span> try {<a name="line.73"></a>
-<span class="sourceLineNo">074</span> // 1. get all the regions hosting this table.<a name="line.74"></a>
-<span class="sourceLineNo">075</span><a name="line.75"></a>
-<span class="sourceLineNo">076</span> // extract each pair to separate lists<a name="line.76"></a>
-<span class="sourceLineNo">077</span> Set<RegionInfo> regions = new HashSet<>();<a name="line.77"></a>
-<span class="sourceLineNo">078</span> for (Pair<RegionInfo, ServerName> p : regionsAndLocations) {<a name="line.78"></a>
-<span class="sourceLineNo">079</span> // Don't include non-default regions<a name="line.79"></a>
-<span class="sourceLineNo">080</span> RegionInfo hri = p.getFirst();<a name="line.80"></a>
-<span class="sourceLineNo">081</span> if (RegionReplicaUtil.isDefaultReplica(hri)) {<a name="line.81"></a>
-<span class="sourceLineNo">082</span> regions.add(hri);<a name="line.82"></a>
-<span class="sourceLineNo">083</span> }<a name="line.83"></a>
-<span class="sourceLineNo">084</span> }<a name="line.84"></a>
-<span class="sourceLineNo">085</span> // handle the mob files if any.<a name="line.85"></a>
-<span class="sourceLineNo">086</span> boolean mobEnabled = MobUtils.hasMobColumns(htd);<a name="line.86"></a>
-<span class="sourceLineNo">087</span> if (mobEnabled) {<a name="line.87"></a>
-<span class="sourceLineNo">088</span> // snapshot the mob files as a offline region.<a name="line.88"></a>
-<span class="sourceLineNo">089</span> RegionInfo mobRegionInfo = MobUtils.getMobRegionInfo(htd.getTableName());<a name="line.89"></a>
-<span class="sourceLineNo">090</span> regions.add(mobRegionInfo);<a name="line.90"></a>
-<span class="sourceLineNo">091</span> }<a name="line.91"></a>
-<span class="sourceLineNo">092</span><a name="line.92"></a>
-<span class="sourceLineNo">093</span> // 2. for each region, write all the info to disk<a name="line.93"></a>
-<span class="sourceLineNo">094</span> String msg = "Starting to write region info and WALs for regions for offline snapshot:"<a name="line.94"></a>
-<span class="sourceLineNo">095</span> + ClientSnapshotDescriptionUtils.toString(snapshot);<a name="line.95"></a>
-<span class="sourceLineNo">096</span> LOG.info(msg);<a name="line.96"></a>
-<span class="sourceLineNo">097</span> status.setStatus(msg);<a name="line.97"></a>
-<span class="sourceLineNo">098</span><a name="line.98"></a>
-<span class="sourceLineNo">099</span> ThreadPoolExecutor exec = SnapshotManifest.createExecutor(conf, "DisabledTableSnapshot");<a name="line.99"></a>
-<span class="sourceLineNo">100</span> try {<a name="line.100"></a>
-<span class="sourceLineNo">101</span> ModifyRegionUtils.editRegions(exec, regions, new ModifyRegionUtils.RegionEditTask() {<a name="line.101"></a>
-<span class="sourceLineNo">102</span> @Override<a name="line.102"></a>
-<span class="sourceLineNo">103</span> public void editRegion(final RegionInfo regionInfo) throws IOException {<a name="line.103"></a>
-<span class="sourceLineNo">104</span> snapshotManifest.addRegion(FSUtils.getTableDir(rootDir, snapshotTable), regionInfo);<a name="line.104"></a>
-<span class="sourceLineNo">105</span> }<a name="line.105"></a>
-<span class="sourceLineNo">106</span> });<a name="line.106"></a>
-<span class="sourceLineNo">107</span> } finally {<a name="line.107"></a>
-<span class="sourceLineNo">108</span> exec.shutdown();<a name="line.108"></a>
-<span class="sourceLineNo">109</span> }<a name="line.109"></a>
-<span class="sourceLineNo">110</span> } catch (Exception e) {<a name="line.110"></a>
-<span class="sourceLineNo">111</span> // make sure we capture the exception to propagate back to the client later<a name="line.111"></a>
-<span class="sourceLineNo">112</span> String reason = "Failed snapshot " + ClientSnapshotDescriptionUtils.toString(snapshot)<a name="line.112"></a>
-<span class="sourceLineNo">113</span> + " due to exception:" + e.getMessage();<a name="line.113"></a>
-<span class="sourceLineNo">114</span> ForeignException ee = new ForeignException(reason, e);<a name="line.114"></a>
-<span class="sourceLineNo">115</span> monitor.receive(ee);<a name="line.115"></a>
-<span class="sourceLineNo">116</span> status.abort("Snapshot of table: "+ snapshotTable + " failed because " + e.getMessage());<a name="line.116"></a>
-<span class="sourceLineNo">117</span> } finally {<a name="line.117"></a>
-<span class="sourceLineNo">118</span> LOG.debug("Marking snapshot" + ClientSnapshotDescriptionUtils.toString(snapshot)<a name="line.118"></a>
-<span class="sourceLineNo">119</span> + " as finished.");<a name="line.119"></a>
-<span class="sourceLineNo">120</span> }<a name="line.120"></a>
-<span class="sourceLineNo">121</span> }<a name="line.121"></a>
-<span class="sourceLineNo">122</span>}<a name="line.122"></a>
+<span class="sourceLineNo">057</span> * @throws IOException if it cannot access the filesystem of the snapshot<a name="line.57"></a>
+<span class="sourceLineNo">058</span> * temporary directory<a name="line.58"></a>
+<span class="sourceLineNo">059</span> */<a name="line.59"></a>
+<span class="sourceLineNo">060</span> public DisabledTableSnapshotHandler(SnapshotDescription snapshot,<a name="line.60"></a>
+<span class="sourceLineNo">061</span> final MasterServices masterServices, final SnapshotManager snapshotManager)<a name="line.61"></a>
+<span class="sourceLineNo">062</span> throws IOException {<a name="line.62"></a>
+<span class="sourceLineNo">063</span> super(snapshot, masterServices, snapshotManager);<a name="line.63"></a>
+<span class="sourceLineNo">064</span> }<a name="line.64"></a>
+<span class="sourceLineNo">065</span><a name="line.65"></a>
+<span class="sourceLineNo">066</span> @Override<a name="line.66"></a>
+<span class="sourceLineNo">067</span> public DisabledTableSnapshotHandler prepare() throws Exception {<a name="line.67"></a>
+<span class="sourceLineNo">068</span> return (DisabledTableSnapshotHandler) super.prepare();<a name="line.68"></a>
+<span class="sourceLineNo">069</span> }<a name="line.69"></a>
+<span class="sourceLineNo">070</span><a name="line.70"></a>
+<span class="sourceLineNo">071</span> // TODO consider parallelizing these operations since they are independent. Right now its just<a name="line.71"></a>
+<span class="sourceLineNo">072</span> // easier to keep them serial though<a name="line.72"></a>
+<span class="sourceLineNo">073</span> @Override<a name="line.73"></a>
+<span class="sourceLineNo">074</span> public void snapshotRegions(List<Pair<RegionInfo, ServerName>> regionsAndLocations)<a name="line.74"></a>
+<span class="sourceLineNo">075</span> throws IOException, KeeperException {<a name="line.75"></a>
+<span class="sourceLineNo">076</span> try {<a name="line.76"></a>
+<span class="sourceLineNo">077</span> // 1. get all the regions hosting this table.<a name="line.77"></a>
+<span class="sourceLineNo">078</span><a name="line.78"></a>
+<span class="sourceLineNo">079</span> // extract each pair to separate lists<a name="line.79"></a>
+<span class="sourceLineNo">080</span> Set<RegionInfo> regions = new HashSet<>();<a name="line.80"></a>
+<span class="sourceLineNo">081</span> for (Pair<RegionInfo, ServerName> p : regionsAndLocations) {<a name="line.81"></a>
+<span class="sourceLineNo">082</span> // Don't include non-default regions<a name="line.82"></a>
+<span class="sourceLineNo">083</span> RegionInfo hri = p.getFirst();<a name="line.83"></a>
+<span class="sourceLineNo">084</span> if (RegionReplicaUtil.isDefaultReplica(hri)) {<a name="line.84"></a>
+<span class="sourceLineNo">085</span> regions.add(hri);<a name="line.85"></a>
+<span class="sourceLineNo">086</span> }<a name="line.86"></a>
+<span class="sourceLineNo">087</span> }<a name="line.87"></a>
+<span class="sourceLineNo">088</span> // handle the mob files if any.<a name="line.88"></a>
+<span class="sourceLineNo">089</span> boolean mobEnabled = MobUtils.hasMobColumns(htd);<a name="line.89"></a>
+<span class="sourceLineNo">090</span> if (mobEnabled) {<a name="line.90"></a>
+<span class="sourceLineNo">091</span> // snapshot the mob files as a offline region.<a name="line.91"></a>
+<span class="sourceLineNo">092</span> RegionInfo mobRegionInfo = MobUtils.getMobRegionInfo(htd.getTableName());<a name="line.92"></a>
+<span class="sourceLineNo">093</span> regions.add(mobRegionInfo);<a name="line.93"></a>
+<span class="sourceLineNo">094</span> }<a name="line.94"></a>
+<span class="sourceLineNo">095</span><a name="line.95"></a>
+<span class="sourceLineNo">096</span> // 2. for each region, write all the info to disk<a name="line.96"></a>
+<span class="sourceLineNo">097</span> String msg = "Starting to write region info and WALs for regions for offline snapshot:"<a name="line.97"></a>
+<span class="sourceLineNo">098</span> + ClientSnapshotDescriptionUtils.toString(snapshot);<a name="line.98"></a>
+<span class="sourceLineNo">099</span> LOG.info(msg);<a name="line.99"></a>
+<span class="sourceLineNo">100</span> status.setStatus(msg);<a name="line.100"></a>
+<span class="sourceLineNo">101</span><a name="line.101"></a>
+<span class="sourceLineNo">102</span> ThreadPoolExecutor exec = SnapshotManifest.createExecutor(conf, "DisabledTableSnapshot");<a name="line.102"></a>
+<span class="sourceLineNo">103</span> try {<a name="line.103"></a>
+<span class="sourceLineNo">104</span> ModifyRegionUtils.editRegions(exec, regions, new ModifyRegionUtils.RegionEditTask() {<a name="line.104"></a>
+<span class="sourceLineNo">105</span> @Override<a name="line.105"></a>
+<span class="sourceLineNo">106</span> public void editRegion(final RegionInfo regionInfo) throws IOException {<a name="line.106"></a>
+<span class="sourceLineNo">107</span> snapshotManifest.addRegion(FSUtils.getTableDir(rootDir, snapshotTable), regionInfo);<a name="line.107"></a>
+<span class="sourceLineNo">108</span> }<a name="line.108"></a>
+<span class="sourceLineNo">109</span> });<a name="line.109"></a>
+<span class="sourceLineNo">110</span> } finally {<a name="line.110"></a>
+<span class="sourceLineNo">111</span> exec.shutdown();<a name="line.111"></a>
+<span class="sourceLineNo">112</span> }<a name="line.112"></a>
+<span class="sourceLineNo">113</span> } catch (Exception e) {<a name="line.113"></a>
+<span class="sourceLineNo">114</span> // make sure we capture the exception to propagate back to the client later<a name="line.114"></a>
+<span class="sourceLineNo">115</span> String reason = "Failed snapshot " + ClientSnapshotDescriptionUtils.toString(snapshot)<a name="line.115"></a>
+<span class="sourceLineNo">116</span> + " due to exception:" + e.getMessage();<a name="line.116"></a>
+<span class="sourceLineNo">117</span> ForeignException ee = new ForeignException(reason, e);<a name="line.117"></a>
+<span class="sourceLineNo">118</span> monitor.receive(ee);<a name="line.118"></a>
+<span class="sourceLineNo">119</span> status.abort("Snapshot of table: "+ snapshotTable + " failed because " + e.getMessage());<a name="line.119"></a>
+<span class="sourceLineNo">120</span> } finally {<a name="line.120"></a>
+<span class="sourceLineNo">121</span> LOG.debug("Marking snapshot" + ClientSnapshotDescriptionUtils.toString(snapshot)<a name="line.121"></a>
+<span class="sourceLineNo">122</span> + " as finished.");<a name="line.122"></a>
+<span class="sourceLineNo">123</span> }<a name="line.123"></a>
+<span class="sourceLineNo">124</span> }<a name="line.124"></a>
+<span class="sourceLineNo">125</span>}<a name="line.125"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/705d69c4/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/EnabledTableSnapshotHandler.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/EnabledTableSnapshotHandler.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/EnabledTableSnapshotHandler.html
index 1e51d8f..f1e72ce 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/EnabledTableSnapshotHandler.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/EnabledTableSnapshotHandler.html
@@ -58,7 +58,7 @@
<span class="sourceLineNo">050</span> private final ProcedureCoordinator coordinator;<a name="line.50"></a>
<span class="sourceLineNo">051</span><a name="line.51"></a>
<span class="sourceLineNo">052</span> public EnabledTableSnapshotHandler(SnapshotDescription snapshot, MasterServices master,<a name="line.52"></a>
-<span class="sourceLineNo">053</span> final SnapshotManager manager) {<a name="line.53"></a>
+<span class="sourceLineNo">053</span> final SnapshotManager manager) throws IOException {<a name="line.53"></a>
<span class="sourceLineNo">054</span> super(snapshot, master, manager);<a name="line.54"></a>
<span class="sourceLineNo">055</span> this.coordinator = manager.getCoordinator();<a name="line.55"></a>
<span class="sourceLineNo">056</span> }<a name="line.56"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/705d69c4/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/MasterSnapshotVerifier.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/MasterSnapshotVerifier.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/MasterSnapshotVerifier.html
index 1137d2f..9a3dd7c 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/MasterSnapshotVerifier.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/snapshot/MasterSnapshotVerifier.html
@@ -44,64 +44,64 @@
<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.snapshot.SnapshotDescriptionUtils;<a name="line.36"></a>
<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.snapshot.SnapshotManifest;<a name="line.37"></a>
<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.snapshot.SnapshotReferenceUtil;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.zookeeper.MetaTableLocator;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import org.apache.yetus.audience.InterfaceStability;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import org.slf4j.Logger;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import org.slf4j.LoggerFactory;<a name="line.43"></a>
-<span class="sourceLineNo">044</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.44"></a>
-<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotRegionManifest;<a name="line.46"></a>
-<span class="sourceLineNo">047</span><a name="line.47"></a>
-<span class="sourceLineNo">048</span>/**<a name="line.48"></a>
-<span class="sourceLineNo">049</span> * General snapshot verification on the master.<a name="line.49"></a>
-<span class="sourceLineNo">050</span> * <p><a name="line.50"></a>
-<span class="sourceLineNo">051</span> * This is a light-weight verification mechanism for all the files in a snapshot. It doesn't<a name="line.51"></a>
-<span class="sourceLineNo">052</span> * attempt to verify that the files are exact copies (that would be paramount to taking the<a name="line.52"></a>
-<span class="sourceLineNo">053</span> * snapshot again!), but instead just attempts to ensure that the files match the expected<a name="line.53"></a>
-<span class="sourceLineNo">054</span> * files and are the same length.<a name="line.54"></a>
-<span class="sourceLineNo">055</span> * <p><a name="line.55"></a>
-<span class="sourceLineNo">056</span> * Taking an online snapshots can race against other operations and this is an last line of<a name="line.56"></a>
-<span class="sourceLineNo">057</span> * defense. For example, if meta changes between when snapshots are taken not all regions of a<a name="line.57"></a>
-<span class="sourceLineNo">058</span> * table may be present. This can be caused by a region split (daughters present on this scan,<a name="line.58"></a>
-<span class="sourceLineNo">059</span> * but snapshot took parent), or move (snapshots only checks lists of region servers, a move could<a name="line.59"></a>
-<span class="sourceLineNo">060</span> * have caused a region to be skipped or done twice).<a name="line.60"></a>
-<span class="sourceLineNo">061</span> * <p><a name="line.61"></a>
-<span class="sourceLineNo">062</span> * Current snapshot files checked:<a name="line.62"></a>
-<span class="sourceLineNo">063</span> * <ol><a name="line.63"></a>
-<span class="sourceLineNo">064</span> * <li>SnapshotDescription is readable</li><a name="line.64"></a>
-<span class="sourceLineNo">065</span> * <li>Table info is readable</li><a name="line.65"></a>
-<span class="sourceLineNo">066</span> * <li>Regions</li><a name="line.66"></a>
-<span class="sourceLineNo">067</span> * </ol><a name="line.67"></a>
-<span class="sourceLineNo">068</span> * <ul><a name="line.68"></a>
-<span class="sourceLineNo">069</span> * <li>Matching regions in the snapshot as currently in the table</li><a name="line.69"></a>
-<span class="sourceLineNo">070</span> * <li>{@link RegionInfo} matches the current and stored regions</li><a name="line.70"></a>
-<span class="sourceLineNo">071</span> * <li>All referenced hfiles have valid names</li><a name="line.71"></a>
-<span class="sourceLineNo">072</span> * <li>All the hfiles are present (either in .archive directory in the region)</li><a name="line.72"></a>
-<span class="sourceLineNo">073</span> * <li>All recovered.edits files are present (by name) and have the correct file size</li><a name="line.73"></a>
-<span class="sourceLineNo">074</span> * </ul><a name="line.74"></a>
-<span class="sourceLineNo">075</span> */<a name="line.75"></a>
-<span class="sourceLineNo">076</span>@InterfaceAudience.Private<a name="line.76"></a>
-<span class="sourceLineNo">077</span>@InterfaceStability.Unstable<a name="line.77"></a>
-<span class="sourceLineNo">078</span>public final class MasterSnapshotVerifier {<a name="line.78"></a>
-<span class="sourceLineNo">079</span> private static final Logger LOG = LoggerFactory.getLogger(MasterSnapshotVerifier.class);<a name="line.79"></a>
-<span class="sourceLineNo">080</span><a name="line.80"></a>
-<span class="sourceLineNo">081</span> private SnapshotDescription snapshot;<a name="line.81"></a>
-<span class="sourceLineNo">082</span> private FileSystem fs;<a name="line.82"></a>
-<span class="sourceLineNo">083</span> private Path rootDir;<a name="line.83"></a>
+<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.util.FSUtils;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import org.apache.hadoop.hbase.zookeeper.MetaTableLocator;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import org.apache.yetus.audience.InterfaceStability;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import org.slf4j.Logger;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import org.slf4j.LoggerFactory;<a name="line.44"></a>
+<span class="sourceLineNo">045</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.45"></a>
+<span class="sourceLineNo">046</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotDescription;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.SnapshotProtos.SnapshotRegionManifest;<a name="line.47"></a>
+<span class="sourceLineNo">048</span><a name="line.48"></a>
+<span class="sourceLineNo">049</span>/**<a name="line.49"></a>
+<span class="sourceLineNo">050</span> * General snapshot verification on the master.<a name="line.50"></a>
+<span class="sourceLineNo">051</span> * <p><a name="line.51"></a>
+<span class="sourceLineNo">052</span> * This is a light-weight verification mechanism for all the files in a snapshot. It doesn't<a name="line.52"></a>
+<span class="sourceLineNo">053</span> * attempt to verify that the files are exact copies (that would be paramount to taking the<a name="line.53"></a>
+<span class="sourceLineNo">054</span> * snapshot again!), but instead just attempts to ensure that the files match the expected<a name="line.54"></a>
+<span class="sourceLineNo">055</span> * files and are the same length.<a name="line.55"></a>
+<span class="sourceLineNo">056</span> * <p><a name="line.56"></a>
+<span class="sourceLineNo">057</span> * Taking an online snapshots can race against other operations and this is an last line of<a name="line.57"></a>
+<span class="sourceLineNo">058</span> * defense. For example, if meta changes between when snapshots are taken not all regions of a<a name="line.58"></a>
+<span class="sourceLineNo">059</span> * table may be present. This can be caused by a region split (daughters present on this scan,<a name="line.59"></a>
+<span class="sourceLineNo">060</span> * but snapshot took parent), or move (snapshots only checks lists of region servers, a move could<a name="line.60"></a>
+<span class="sourceLineNo">061</span> * have caused a region to be skipped or done twice).<a name="line.61"></a>
+<span class="sourceLineNo">062</span> * <p><a name="line.62"></a>
+<span class="sourceLineNo">063</span> * Current snapshot files checked:<a name="line.63"></a>
+<span class="sourceLineNo">064</span> * <ol><a name="line.64"></a>
+<span class="sourceLineNo">065</span> * <li>SnapshotDescription is readable</li><a name="line.65"></a>
+<span class="sourceLineNo">066</span> * <li>Table info is readable</li><a name="line.66"></a>
+<span class="sourceLineNo">067</span> * <li>Regions</li><a name="line.67"></a>
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+<span class="sourceLineNo">069</span> * <ul><a name="line.69"></a>
+<span class="sourceLineNo">070</span> * <li>Matching regions in the snapshot as currently in the table</li><a name="line.70"></a>
+<span class="sourceLineNo">071</span> * <li>{@link RegionInfo} matches the current and stored regions</li><a name="line.71"></a>
+<span class="sourceLineNo">072</span> * <li>All referenced hfiles have valid names</li><a name="line.72"></a>
+<span class="sourceLineNo">073</span> * <li>All the hfiles are present (either in .archive directory in the region)</li><a name="line.73"></a>
+<span class="sourceLineNo">074</span> * <li>All recovered.edits files are present (by name) and have the correct file size</li><a name="line.74"></a>
+<span class="sourceLineNo">075</span> * </ul><a name="line.75"></a>
+<span class="sourceLineNo">076</span> */<a name="line.76"></a>
+<span class="sourceLineNo">077</span>@InterfaceAudience.Private<a name="line.77"></a>
+<span class="sourceLineNo">078</span>@InterfaceStability.Unstable<a name="line.78"></a>
+<span class="sourceLineNo">079</span>public final class MasterSnapshotVerifier {<a name="line.79"></a>
+<span class="sourceLineNo">080</span> private static final Logger LOG = LoggerFactory.getLogger(MasterSnapshotVerifier.class);<a name="line.80"></a>
+<span class="sourceLineNo">081</span><a name="line.81"></a>
+<span class="sourceLineNo">082</span> private SnapshotDescription snapshot;<a name="line.82"></a>
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<span class="sourceLineNo">084</span> private TableName tableName;<a name="line.84"></a>
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<span class="sourceLineNo">086</span><a name="line.86"></a>
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<span class="sourceLineNo">088</span> * @param services services for the master<a name="line.88"></a>
<span class="sourceLineNo">089</span> * @param snapshot snapshot to check<a name="line.89"></a>
-<span class="sourceLineNo">090</span> * @param rootDir root directory of the hbase installation.<a name="line.90"></a>
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<span class="sourceLineNo">091</span> */<a name="line.91"></a>
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-<span class="sourceLineNo">096</span> this.rootDir = rootDir;<a name="line.96"></a>
+<span class="sourceLineNo">092</span> public MasterSnapshotVerifier(MasterServices services,<a name="line.92"></a>
+<span class="sourceLineNo">093</span> SnapshotDescription snapshot, FileSystem workingDirFs) {<a name="line.93"></a>
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+<span class="sourceLineNo">096</span> this.snapshot = snapshot;<a name="line.96"></a>
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<span class="sourceLineNo">098</span> }<a name="line.98"></a>
<span class="sourceLineNo">099</span><a name="line.99"></a>
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<span class="sourceLineNo">107</span> */<a name="line.107"></a>
<span class="sourceLineNo">108</span> public void verifySnapshot(Path snapshotDir, Set<String> snapshotServers)<a name="line.108"></a>
<span class="sourceLineNo">109</span> throws CorruptedSnapshotException, IOException {<a name="line.109"></a>
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<span class="sourceLineNo">111</span> snapshotDir, snapshot);<a name="line.111"></a>
<span class="sourceLineNo">112</span> // verify snapshot info matches<a name="line.112"></a>
<span class="sourceLineNo">113</span> verifySnapshotDescription(snapshotDir);<a name="line.113"></a>
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<span class="sourceLineNo">124</span> * @param snapshotDir snapshot directory to check<a name="line.124"></a>
<span class="sourceLineNo">125</span> */<a name="line.125"></a>
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-<span class="sourceLineNo">129</span> throw new CorruptedSnapshotException(<a name="line.129"></a>
-<span class="sourceLineNo">130</span> "Snapshot read (" + found + ") doesn't equal snapshot we ran (" + snapshot + ").",<a name="line.130"></a>
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-<span class="sourceLineNo">142</span> throw new CorruptedSnapshotException("Missing Table Descriptor",<a name="line.142"></a>
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-<span class="sourceLineNo">149</span> + htd.getTableName().getNameAsString(), ProtobufUtil.createSnapshotDesc(snapshot));<a name="line.149"></a>
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-<span class="sourceLineNo">167</span><a name="line.167"></a>
-<span class="sourceLineNo">168</span> Map<String, SnapshotRegionManifest> regionManifests = manifest.getRegionManifestsMap();<a name="line.168"></a>
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-<span class="sourceLineNo">171</span> LOG.error(msg);<a name="line.171"></a>
-<span class="sourceLineNo">172</span> throw new CorruptedSnapshotException(msg);<a name="line.172"></a>
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-<span class="sourceLineNo">174</span><a name="line.174"></a>
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-<span class="sourceLineNo">178</span> // the mob region has a special name, it could be found by the region name.<a name="line.178"></a>
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-<span class="sourceLineNo">182</span> int realRegionCount = hasMobStore ? regionManifests.size() - 1 : regionManifests.size();<a name="line.182"></a>
-<span class="sourceLineNo">183</span> if (realRegionCount != regions.size()) {<a name="line.183"></a>
-<span class="sourceLineNo">184</span> errorMsg = "Regions moved during the snapshot '" +<a name="line.184"></a>
-<span class="sourceLineNo">185</span> ClientSnapshotDescriptionUtils.toString(snapshot) + "'. expected=" +<a name="line.185"></a>
-<span class="sourceLineNo">186</span> regions.size() + " snapshotted=" + realRegionCount + ".";<a name="line.186"></a>
-<span class="sourceLineNo">187</span> LOG.error(errorMsg);<a name="line.187"></a>
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-<span class="sourceLineNo">190</span> // Verify RegionInfo<a name="line.190"></a>
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-<span class="sourceLineNo">192</span> SnapshotRegionManifest regionManifest = regionManifests.get(region.getEncodedName());<a name="line.192"></a>
-<span class="sourceLineNo">193</span> if (regionManifest == null) {<a name="line.193"></a>
-<span class="sourceLineNo">194</span> // could happen due to a move or split race.<a name="line.194"></a>
-<span class="sourceLineNo">195</span> String mesg = " No snapshot region directory found for region:" + region;<a name="line.195"></a>
-<span class="sourceLineNo">196</span> if (errorMsg.isEmpty()) errorMsg = mesg;<a name="line.196"></a>
-<span class="sourceLineNo">197</span> LOG.error(mesg);<a name="line.197"></a>
-<span class="sourceLineNo">198</span> continue;<a name="line.198"></a>
-<span class="sourceLineNo">199</span> }<a name="line.199"></a>
-<span class="sourceLineNo">200</span><a name="line.200"></a>
-<span class="sourceLineNo">201</span> verifyRegionInfo(region, regionManifest);<a name="line.201"></a>
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-<span class="sourceLineNo">203</span><a name="line.203"></a>
-<span class="sourceLineNo">204</span> if (!errorMsg.isEmpty()) {<a name="line.204"></a>
-<span class="sourceLineNo">205</span> throw new CorruptedSnapshotException(errorMsg);<a name="line.205"></a>
-<span class="sourceLineNo">206</span> }<a name="line.206"></a>
-<span class="sourceLineNo">207</span><a name="line.207"></a>
-<span class="sourceLineNo">208</span> // Verify Snapshot HFiles<a name="line.208"></a>
-<span class="sourceLineNo">209</span> SnapshotReferenceUtil.verifySnapshot(services.getConfiguration(), fs, manifest);<a name="line.209"></a>
-<span class="sourceLineNo">210</span> }<a name="line.210"></a>
-<span class="sourceLineNo">211</span><a name="line.211"></a>
-<span class="sourceLineNo">212</span> /**<a name="line.212"></a>
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-<span class="sourceLineNo">215</span> * @param manifest snapshot manifest to inspect<a name="line.215"></a>
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-<span class="sourceLineNo">218</span> final SnapshotRegionManifest manifest) throws IOException {<a name="line.218"></a>
-<span class="sourceLineNo">219</span> RegionInfo manifestRegionInfo = ProtobufUtil.toRegionInfo(manifest.getRegionInfo());<a name="line.219"></a>
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-<span class="sourceLineNo">221</span> String msg = "Manifest region info " + manifestRegionInfo +<a name="line.221"></a>
-<span class="sourceLineNo">222</span> "doesn't match expected region:" + region;<a name="line.222"></a>
-<span class="sourceLineNo">223</span> throw new CorruptedSnapshotException(msg, ProtobufUtil.createSnapshotDesc(snapshot));<a name="line.223"></a>
-<span class="sourceLineNo">224</span> }<a name="line.224"></a>
-<span class="sourceLineNo">225</span> }<a name="line.225"></a>
-<span class="sourceLineNo">226</span>}<a name="line.226"></a>
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+<span class="sourceLineNo">128</span> snapshotDir);<a name="line.128"></a>
+<span class="sourceLineNo">129</span> if (!this.snapshot.equals(found)) {<a name="line.129"></a>
+<span class="sourceLineNo">130</span> throw new CorruptedSnapshotException(<a name="line.130"></a>
+<span class="sourceLineNo">131</span> "Snapshot read (" + found + ") doesn't equal snapshot we ran (" + snapshot + ").",<a name="line.131"></a>
+<span class="sourceLineNo">132</span> ProtobufUtil.createSnapshotDesc(snapshot));<a name="line.132"></a>
+<span class="sourceLineNo">133</span> }<a name="line.133"></a>
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+<span class="sourceLineNo">136</span> /**<a name="line.136"></a>
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+<span class="sourceLineNo">143</span> throw new CorruptedSnapshotException("Missing Table Descriptor",<a name="line.143"></a>
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+<span class="sourceLineNo">207</span> }<a name="line.207"></a>
+<span class="sourceLineNo">208</span><a name="line.208"></a>
+<span class="sourceLineNo">209</span> // Verify Snapshot HFiles<a name="line.209"></a>
+<span class="sourceLineNo">210</span> // Requires the root directory file system as HFiles are stored in the root directory<a name="line.210"></a>
+<span class="sourceLineNo">211</span> SnapshotReferenceUtil.verifySnapshot(services.getConfiguration(),<a name="line.211"></a>
+<span class="sourceLineNo">212</span> FSUtils.getRootDirFileSystem(services.getConfiguration()), manifest);<a name="line.212"></a>
+<span class="sourceLineNo">213</span> }<a name="line.213"></a>
+<span class="sourceLineNo">214</span><a name="line.214"></a>
+<span class="sourceLineNo">215</span> /**<a name="line.215"></a>
+<span class="sourceLineNo">216</span> * Verify that the regionInfo is valid<a name="line.216"></a>
+<span class="sourceLineNo">217</span> * @param region the region to check<a name="line.217"></a>
+<span class="sourceLineNo">218</span> * @param manifest snapshot manifest to inspect<a name="line.218"></a>
+<span class="sourceLineNo">219</span> */<a name="line.219"></a>
+<span class="sourceLineNo">220</span> private void verifyRegionInfo(final RegionInfo region,<a name="line.220"></a>
+<span class="sourceLineNo">221</span> final SnapshotRegionManifest manifest) throws IOException {<a name="line.221"></a>
+<span class="sourceLineNo">222</span> RegionInfo manifestRegionInfo = ProtobufUtil.toRegionInfo(manifest.getRegionInfo());<a name="line.222"></a>
+<span class="sourceLineNo">223</span> if (RegionInfo.COMPARATOR.compare(region, manifestRegionInfo) != 0) {<a name="line.223"></a>
+<span class="sourceLineNo">224</span> String msg = "Manifest region info " + manifestRegionInfo +<a name="line.224"></a>
+<span class="sourceLineNo">225</span> "doesn't match expected region:" + region;<a name="line.225"></a>
+<span class="sourceLineNo">226</span> throw new CorruptedSnapshotException(msg, ProtobufUtil.createSnapshotDesc(snapshot));<a name="line.226"></a>
+<span class="sourceLineNo">227</span> }<a name="line.227"></a>
+<span class="sourceLineNo">228</span> }<a name="line.228"></a>
+<span class="sourceLineNo">229</span>}<a name="line.229"></a>