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 2018/05/18 14:47:51 UTC
[08/29] hbase-site git commit: Published site at
c9f8c3436f6e38b5c7807677c5c3e7fc3e19e071.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/ead846d7/devapidocs/src-html/org/apache/hadoop/hbase/util/FSUtils.HFileFilter.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/util/FSUtils.HFileFilter.html b/devapidocs/src-html/org/apache/hadoop/hbase/util/FSUtils.HFileFilter.html
index ec995d2..01a18e6 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/util/FSUtils.HFileFilter.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/util/FSUtils.HFileFilter.html
@@ -51,1705 +51,1748 @@
<span class="sourceLineNo">043</span>import java.util.concurrent.ConcurrentHashMap;<a name="line.43"></a>
<span class="sourceLineNo">044</span>import java.util.concurrent.ExecutionException;<a name="line.44"></a>
<span class="sourceLineNo">045</span>import java.util.concurrent.ExecutorService;<a name="line.45"></a>
-<span class="sourceLineNo">046</span>import java.util.concurrent.Future;<a name="line.46"></a>
-<span class="sourceLineNo">047</span>import java.util.concurrent.FutureTask;<a name="line.47"></a>
-<span class="sourceLineNo">048</span>import java.util.concurrent.ThreadPoolExecutor;<a name="line.48"></a>
-<span class="sourceLineNo">049</span>import java.util.concurrent.TimeUnit;<a name="line.49"></a>
-<span class="sourceLineNo">050</span>import java.util.regex.Pattern;<a name="line.50"></a>
-<span class="sourceLineNo">051</span>import org.apache.hadoop.conf.Configuration;<a name="line.51"></a>
-<span class="sourceLineNo">052</span>import org.apache.hadoop.fs.BlockLocation;<a name="line.52"></a>
-<span class="sourceLineNo">053</span>import org.apache.hadoop.fs.FSDataInputStream;<a name="line.53"></a>
-<span class="sourceLineNo">054</span>import org.apache.hadoop.fs.FSDataOutputStream;<a name="line.54"></a>
-<span class="sourceLineNo">055</span>import org.apache.hadoop.fs.FileStatus;<a name="line.55"></a>
-<span class="sourceLineNo">056</span>import org.apache.hadoop.fs.FileSystem;<a name="line.56"></a>
-<span class="sourceLineNo">057</span>import org.apache.hadoop.fs.Path;<a name="line.57"></a>
-<span class="sourceLineNo">058</span>import org.apache.hadoop.fs.PathFilter;<a name="line.58"></a>
-<span class="sourceLineNo">059</span>import org.apache.hadoop.fs.permission.FsAction;<a name="line.59"></a>
-<span class="sourceLineNo">060</span>import org.apache.hadoop.fs.permission.FsPermission;<a name="line.60"></a>
-<span class="sourceLineNo">061</span>import org.apache.hadoop.hbase.ClusterId;<a name="line.61"></a>
-<span class="sourceLineNo">062</span>import org.apache.hadoop.hbase.HColumnDescriptor;<a name="line.62"></a>
-<span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.HConstants;<a name="line.63"></a>
-<span class="sourceLineNo">064</span>import org.apache.hadoop.hbase.HDFSBlocksDistribution;<a name="line.64"></a>
-<span class="sourceLineNo">065</span>import org.apache.hadoop.hbase.HRegionInfo;<a name="line.65"></a>
-<span class="sourceLineNo">066</span>import org.apache.hadoop.hbase.TableName;<a name="line.66"></a>
-<span class="sourceLineNo">067</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.67"></a>
-<span class="sourceLineNo">068</span>import org.apache.hadoop.hbase.exceptions.DeserializationException;<a name="line.68"></a>
-<span class="sourceLineNo">069</span>import org.apache.hadoop.hbase.fs.HFileSystem;<a name="line.69"></a>
-<span class="sourceLineNo">070</span>import org.apache.hadoop.hbase.io.HFileLink;<a name="line.70"></a>
-<span class="sourceLineNo">071</span>import org.apache.hadoop.hbase.master.HMaster;<a name="line.71"></a>
-<span class="sourceLineNo">072</span>import org.apache.hadoop.hbase.regionserver.HRegion;<a name="line.72"></a>
-<span class="sourceLineNo">073</span>import org.apache.hadoop.hbase.regionserver.StoreFileInfo;<a name="line.73"></a>
-<span class="sourceLineNo">074</span>import org.apache.hadoop.hbase.security.AccessDeniedException;<a name="line.74"></a>
-<span class="sourceLineNo">075</span>import org.apache.hadoop.hbase.util.HBaseFsck.ErrorReporter;<a name="line.75"></a>
-<span class="sourceLineNo">076</span>import org.apache.hadoop.hdfs.DFSClient;<a name="line.76"></a>
-<span class="sourceLineNo">077</span>import org.apache.hadoop.hdfs.DFSHedgedReadMetrics;<a name="line.77"></a>
-<span class="sourceLineNo">078</span>import org.apache.hadoop.hdfs.DistributedFileSystem;<a name="line.78"></a>
-<span class="sourceLineNo">079</span>import org.apache.hadoop.hdfs.protocol.HdfsConstants;<a name="line.79"></a>
-<span class="sourceLineNo">080</span>import org.apache.hadoop.io.IOUtils;<a name="line.80"></a>
-<span class="sourceLineNo">081</span>import org.apache.hadoop.ipc.RemoteException;<a name="line.81"></a>
-<span class="sourceLineNo">082</span>import org.apache.hadoop.security.UserGroupInformation;<a name="line.82"></a>
-<span class="sourceLineNo">083</span>import org.apache.hadoop.util.Progressable;<a name="line.83"></a>
-<span class="sourceLineNo">084</span>import org.apache.hadoop.util.ReflectionUtils;<a name="line.84"></a>
-<span class="sourceLineNo">085</span>import org.apache.hadoop.util.StringUtils;<a name="line.85"></a>
-<span class="sourceLineNo">086</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.86"></a>
-<span class="sourceLineNo">087</span>import org.slf4j.Logger;<a name="line.87"></a>
-<span class="sourceLineNo">088</span>import org.slf4j.LoggerFactory;<a name="line.88"></a>
-<span class="sourceLineNo">089</span><a name="line.89"></a>
-<span class="sourceLineNo">090</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.90"></a>
-<span class="sourceLineNo">091</span>import org.apache.hbase.thirdparty.com.google.common.base.Throwables;<a name="line.91"></a>
-<span class="sourceLineNo">092</span>import org.apache.hbase.thirdparty.com.google.common.collect.Iterators;<a name="line.92"></a>
-<span class="sourceLineNo">093</span>import org.apache.hbase.thirdparty.com.google.common.primitives.Ints;<a name="line.93"></a>
-<span class="sourceLineNo">094</span><a name="line.94"></a>
-<span class="sourceLineNo">095</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.95"></a>
-<span class="sourceLineNo">096</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.FSProtos;<a name="line.96"></a>
-<span class="sourceLineNo">097</span><a name="line.97"></a>
-<span class="sourceLineNo">098</span>/**<a name="line.98"></a>
-<span class="sourceLineNo">099</span> * Utility methods for interacting with the underlying file system.<a name="line.99"></a>
-<span class="sourceLineNo">100</span> */<a name="line.100"></a>
-<span class="sourceLineNo">101</span>@InterfaceAudience.Private<a name="line.101"></a>
-<span class="sourceLineNo">102</span>public abstract class FSUtils extends CommonFSUtils {<a name="line.102"></a>
-<span class="sourceLineNo">103</span> private static final Logger LOG = LoggerFactory.getLogger(FSUtils.class);<a name="line.103"></a>
-<span class="sourceLineNo">104</span><a name="line.104"></a>
-<span class="sourceLineNo">105</span> private static final String THREAD_POOLSIZE = "hbase.client.localityCheck.threadPoolSize";<a name="line.105"></a>
-<span class="sourceLineNo">106</span> private static final int DEFAULT_THREAD_POOLSIZE = 2;<a name="line.106"></a>
-<span class="sourceLineNo">107</span><a name="line.107"></a>
-<span class="sourceLineNo">108</span> /** Set to true on Windows platforms */<a name="line.108"></a>
-<span class="sourceLineNo">109</span> @VisibleForTesting // currently only used in testing. TODO refactor into a test class<a name="line.109"></a>
-<span class="sourceLineNo">110</span> public static final boolean WINDOWS = System.getProperty("os.name").startsWith("Windows");<a name="line.110"></a>
-<span class="sourceLineNo">111</span><a name="line.111"></a>
-<span class="sourceLineNo">112</span> protected FSUtils() {<a name="line.112"></a>
-<span class="sourceLineNo">113</span> super();<a name="line.113"></a>
-<span class="sourceLineNo">114</span> }<a name="line.114"></a>
-<span class="sourceLineNo">115</span><a name="line.115"></a>
-<span class="sourceLineNo">116</span> /**<a name="line.116"></a>
-<span class="sourceLineNo">117</span> * @return True is <code>fs</code> is instance of DistributedFileSystem<a name="line.117"></a>
-<span class="sourceLineNo">118</span> * @throws IOException<a name="line.118"></a>
-<span class="sourceLineNo">119</span> */<a name="line.119"></a>
-<span class="sourceLineNo">120</span> public static boolean isDistributedFileSystem(final FileSystem fs) throws IOException {<a name="line.120"></a>
-<span class="sourceLineNo">121</span> FileSystem fileSystem = fs;<a name="line.121"></a>
-<span class="sourceLineNo">122</span> // If passed an instance of HFileSystem, it fails instanceof DistributedFileSystem.<a name="line.122"></a>
-<span class="sourceLineNo">123</span> // Check its backing fs for dfs-ness.<a name="line.123"></a>
-<span class="sourceLineNo">124</span> if (fs instanceof HFileSystem) {<a name="line.124"></a>
-<span class="sourceLineNo">125</span> fileSystem = ((HFileSystem)fs).getBackingFs();<a name="line.125"></a>
-<span class="sourceLineNo">126</span> }<a name="line.126"></a>
-<span class="sourceLineNo">127</span> return fileSystem instanceof DistributedFileSystem;<a name="line.127"></a>
-<span class="sourceLineNo">128</span> }<a name="line.128"></a>
-<span class="sourceLineNo">129</span><a name="line.129"></a>
-<span class="sourceLineNo">130</span> /**<a name="line.130"></a>
-<span class="sourceLineNo">131</span> * Compare path component of the Path URI; e.g. if hdfs://a/b/c and /a/b/c, it will compare the<a name="line.131"></a>
-<span class="sourceLineNo">132</span> * '/a/b/c' part. If you passed in 'hdfs://a/b/c and b/c, it would return true. Does not consider<a name="line.132"></a>
-<span class="sourceLineNo">133</span> * schema; i.e. if schemas different but path or subpath matches, the two will equate.<a name="line.133"></a>
-<span class="sourceLineNo">134</span> * @param pathToSearch Path we will be trying to match.<a name="line.134"></a>
-<span class="sourceLineNo">135</span> * @param pathTail<a name="line.135"></a>
-<span class="sourceLineNo">136</span> * @return True if <code>pathTail</code> is tail on the path of <code>pathToSearch</code><a name="line.136"></a>
-<span class="sourceLineNo">137</span> */<a name="line.137"></a>
-<span class="sourceLineNo">138</span> public static boolean isMatchingTail(final Path pathToSearch, final Path pathTail) {<a name="line.138"></a>
-<span class="sourceLineNo">139</span> if (pathToSearch.depth() != pathTail.depth()) return false;<a name="line.139"></a>
-<span class="sourceLineNo">140</span> Path tailPath = pathTail;<a name="line.140"></a>
-<span class="sourceLineNo">141</span> String tailName;<a name="line.141"></a>
-<span class="sourceLineNo">142</span> Path toSearch = pathToSearch;<a name="line.142"></a>
-<span class="sourceLineNo">143</span> String toSearchName;<a name="line.143"></a>
-<span class="sourceLineNo">144</span> boolean result = false;<a name="line.144"></a>
-<span class="sourceLineNo">145</span> do {<a name="line.145"></a>
-<span class="sourceLineNo">146</span> tailName = tailPath.getName();<a name="line.146"></a>
-<span class="sourceLineNo">147</span> if (tailName == null || tailName.length() <= 0) {<a name="line.147"></a>
-<span class="sourceLineNo">148</span> result = true;<a name="line.148"></a>
-<span class="sourceLineNo">149</span> break;<a name="line.149"></a>
-<span class="sourceLineNo">150</span> }<a name="line.150"></a>
-<span class="sourceLineNo">151</span> toSearchName = toSearch.getName();<a name="line.151"></a>
-<span class="sourceLineNo">152</span> if (toSearchName == null || toSearchName.length() <= 0) break;<a name="line.152"></a>
-<span class="sourceLineNo">153</span> // Move up a parent on each path for next go around. Path doesn't let us go off the end.<a name="line.153"></a>
-<span class="sourceLineNo">154</span> tailPath = tailPath.getParent();<a name="line.154"></a>
-<span class="sourceLineNo">155</span> toSearch = toSearch.getParent();<a name="line.155"></a>
-<span class="sourceLineNo">156</span> } while(tailName.equals(toSearchName));<a name="line.156"></a>
-<span class="sourceLineNo">157</span> return result;<a name="line.157"></a>
-<span class="sourceLineNo">158</span> }<a name="line.158"></a>
-<span class="sourceLineNo">159</span><a name="line.159"></a>
-<span class="sourceLineNo">160</span> public static FSUtils getInstance(FileSystem fs, Configuration conf) {<a name="line.160"></a>
-<span class="sourceLineNo">161</span> String scheme = fs.getUri().getScheme();<a name="line.161"></a>
-<span class="sourceLineNo">162</span> if (scheme == null) {<a name="line.162"></a>
-<span class="sourceLineNo">163</span> LOG.warn("Could not find scheme for uri " +<a name="line.163"></a>
-<span class="sourceLineNo">164</span> fs.getUri() + ", default to hdfs");<a name="line.164"></a>
-<span class="sourceLineNo">165</span> scheme = "hdfs";<a name="line.165"></a>
-<span class="sourceLineNo">166</span> }<a name="line.166"></a>
-<span class="sourceLineNo">167</span> Class<?> fsUtilsClass = conf.getClass("hbase.fsutil." +<a name="line.167"></a>
-<span class="sourceLineNo">168</span> scheme + ".impl", FSHDFSUtils.class); // Default to HDFS impl<a name="line.168"></a>
-<span class="sourceLineNo">169</span> FSUtils fsUtils = (FSUtils)ReflectionUtils.newInstance(fsUtilsClass, conf);<a name="line.169"></a>
-<span class="sourceLineNo">170</span> return fsUtils;<a name="line.170"></a>
-<span class="sourceLineNo">171</span> }<a name="line.171"></a>
-<span class="sourceLineNo">172</span><a name="line.172"></a>
-<span class="sourceLineNo">173</span> /**<a name="line.173"></a>
-<span class="sourceLineNo">174</span> * Delete the region directory if exists.<a name="line.174"></a>
-<span class="sourceLineNo">175</span> * @param conf<a name="line.175"></a>
-<span class="sourceLineNo">176</span> * @param hri<a name="line.176"></a>
-<span class="sourceLineNo">177</span> * @return True if deleted the region directory.<a name="line.177"></a>
-<span class="sourceLineNo">178</span> * @throws IOException<a name="line.178"></a>
-<span class="sourceLineNo">179</span> */<a name="line.179"></a>
-<span class="sourceLineNo">180</span> public static boolean deleteRegionDir(final Configuration conf, final HRegionInfo hri)<a name="line.180"></a>
-<span class="sourceLineNo">181</span> throws IOException {<a name="line.181"></a>
-<span class="sourceLineNo">182</span> Path rootDir = getRootDir(conf);<a name="line.182"></a>
-<span class="sourceLineNo">183</span> FileSystem fs = rootDir.getFileSystem(conf);<a name="line.183"></a>
-<span class="sourceLineNo">184</span> return deleteDirectory(fs,<a name="line.184"></a>
-<span class="sourceLineNo">185</span> new Path(getTableDir(rootDir, hri.getTable()), hri.getEncodedName()));<a name="line.185"></a>
-<span class="sourceLineNo">186</span> }<a name="line.186"></a>
-<span class="sourceLineNo">187</span><a name="line.187"></a>
-<span class="sourceLineNo">188</span> /**<a name="line.188"></a>
-<span class="sourceLineNo">189</span> * Create the specified file on the filesystem. By default, this will:<a name="line.189"></a>
-<span class="sourceLineNo">190</span> * <ol><a name="line.190"></a>
-<span class="sourceLineNo">191</span> * <li>overwrite the file if it exists</li><a name="line.191"></a>
-<span class="sourceLineNo">192</span> * <li>apply the umask in the configuration (if it is enabled)</li><a name="line.192"></a>
-<span class="sourceLineNo">193</span> * <li>use the fs configured buffer size (or 4096 if not set)</li><a name="line.193"></a>
-<span class="sourceLineNo">194</span> * <li>use the configured column family replication or default replication if<a name="line.194"></a>
-<span class="sourceLineNo">195</span> * {@link HColumnDescriptor#DEFAULT_DFS_REPLICATION}</li><a name="line.195"></a>
-<span class="sourceLineNo">196</span> * <li>use the default block size</li><a name="line.196"></a>
-<span class="sourceLineNo">197</span> * <li>not track progress</li><a name="line.197"></a>
-<span class="sourceLineNo">198</span> * </ol><a name="line.198"></a>
-<span class="sourceLineNo">199</span> * @param conf configurations<a name="line.199"></a>
-<span class="sourceLineNo">200</span> * @param fs {@link FileSystem} on which to write the file<a name="line.200"></a>
-<span class="sourceLineNo">201</span> * @param path {@link Path} to the file to write<a name="line.201"></a>
-<span class="sourceLineNo">202</span> * @param perm permissions<a name="line.202"></a>
-<span class="sourceLineNo">203</span> * @param favoredNodes<a name="line.203"></a>
-<span class="sourceLineNo">204</span> * @return output stream to the created file<a name="line.204"></a>
-<span class="sourceLineNo">205</span> * @throws IOException if the file cannot be created<a name="line.205"></a>
-<span class="sourceLineNo">206</span> */<a name="line.206"></a>
-<span class="sourceLineNo">207</span> public static FSDataOutputStream create(Configuration conf, FileSystem fs, Path path,<a name="line.207"></a>
-<span class="sourceLineNo">208</span> FsPermission perm, InetSocketAddress[] favoredNodes) throws IOException {<a name="line.208"></a>
-<span class="sourceLineNo">209</span> if (fs instanceof HFileSystem) {<a name="line.209"></a>
-<span class="sourceLineNo">210</span> FileSystem backingFs = ((HFileSystem)fs).getBackingFs();<a name="line.210"></a>
-<span class="sourceLineNo">211</span> if (backingFs instanceof DistributedFileSystem) {<a name="line.211"></a>
-<span class="sourceLineNo">212</span> // Try to use the favoredNodes version via reflection to allow backwards-<a name="line.212"></a>
-<span class="sourceLineNo">213</span> // compatibility.<a name="line.213"></a>
-<span class="sourceLineNo">214</span> short replication = Short.parseShort(conf.get(HColumnDescriptor.DFS_REPLICATION,<a name="line.214"></a>
-<span class="sourceLineNo">215</span> String.valueOf(HColumnDescriptor.DEFAULT_DFS_REPLICATION)));<a name="line.215"></a>
-<span class="sourceLineNo">216</span> try {<a name="line.216"></a>
-<span class="sourceLineNo">217</span> return (FSDataOutputStream) (DistributedFileSystem.class.getDeclaredMethod("create",<a name="line.217"></a>
-<span class="sourceLineNo">218</span> Path.class, FsPermission.class, boolean.class, int.class, short.class, long.class,<a name="line.218"></a>
-<span class="sourceLineNo">219</span> Progressable.class, InetSocketAddress[].class).invoke(backingFs, path, perm, true,<a name="line.219"></a>
-<span class="sourceLineNo">220</span> getDefaultBufferSize(backingFs),<a name="line.220"></a>
-<span class="sourceLineNo">221</span> replication > 0 ? replication : getDefaultReplication(backingFs, path),<a name="line.221"></a>
-<span class="sourceLineNo">222</span> getDefaultBlockSize(backingFs, path), null, favoredNodes));<a name="line.222"></a>
-<span class="sourceLineNo">223</span> } catch (InvocationTargetException ite) {<a name="line.223"></a>
-<span class="sourceLineNo">224</span> // Function was properly called, but threw it's own exception.<a name="line.224"></a>
-<span class="sourceLineNo">225</span> throw new IOException(ite.getCause());<a name="line.225"></a>
-<span class="sourceLineNo">226</span> } catch (NoSuchMethodException e) {<a name="line.226"></a>
-<span class="sourceLineNo">227</span> LOG.debug("DFS Client does not support most favored nodes create; using default create");<a name="line.227"></a>
-<span class="sourceLineNo">228</span> if (LOG.isTraceEnabled()) LOG.trace("Ignoring; use default create", e);<a name="line.228"></a>
-<span class="sourceLineNo">229</span> } catch (IllegalArgumentException e) {<a name="line.229"></a>
-<span class="sourceLineNo">230</span> LOG.debug("Ignoring (most likely Reflection related exception) " + e);<a name="line.230"></a>
-<span class="sourceLineNo">231</span> } catch (SecurityException e) {<a name="line.231"></a>
+<span class="sourceLineNo">046</span>import java.util.concurrent.Executors;<a name="line.46"></a>
+<span class="sourceLineNo">047</span>import java.util.concurrent.Future;<a name="line.47"></a>
+<span class="sourceLineNo">048</span>import java.util.concurrent.FutureTask;<a name="line.48"></a>
+<span class="sourceLineNo">049</span>import java.util.concurrent.ThreadPoolExecutor;<a name="line.49"></a>
+<span class="sourceLineNo">050</span>import java.util.concurrent.TimeUnit;<a name="line.50"></a>
+<span class="sourceLineNo">051</span>import java.util.regex.Pattern;<a name="line.51"></a>
+<span class="sourceLineNo">052</span>import org.apache.hadoop.conf.Configuration;<a name="line.52"></a>
+<span class="sourceLineNo">053</span>import org.apache.hadoop.fs.BlockLocation;<a name="line.53"></a>
+<span class="sourceLineNo">054</span>import org.apache.hadoop.fs.FSDataInputStream;<a name="line.54"></a>
+<span class="sourceLineNo">055</span>import org.apache.hadoop.fs.FSDataOutputStream;<a name="line.55"></a>
+<span class="sourceLineNo">056</span>import org.apache.hadoop.fs.FileStatus;<a name="line.56"></a>
+<span class="sourceLineNo">057</span>import org.apache.hadoop.fs.FileSystem;<a name="line.57"></a>
+<span class="sourceLineNo">058</span>import org.apache.hadoop.fs.FileUtil;<a name="line.58"></a>
+<span class="sourceLineNo">059</span>import org.apache.hadoop.fs.Path;<a name="line.59"></a>
+<span class="sourceLineNo">060</span>import org.apache.hadoop.fs.PathFilter;<a name="line.60"></a>
+<span class="sourceLineNo">061</span>import org.apache.hadoop.fs.permission.FsAction;<a name="line.61"></a>
+<span class="sourceLineNo">062</span>import org.apache.hadoop.fs.permission.FsPermission;<a name="line.62"></a>
+<span class="sourceLineNo">063</span>import org.apache.hadoop.hbase.ClusterId;<a name="line.63"></a>
+<span class="sourceLineNo">064</span>import org.apache.hadoop.hbase.HColumnDescriptor;<a name="line.64"></a>
+<span class="sourceLineNo">065</span>import org.apache.hadoop.hbase.HConstants;<a name="line.65"></a>
+<span class="sourceLineNo">066</span>import org.apache.hadoop.hbase.HDFSBlocksDistribution;<a name="line.66"></a>
+<span class="sourceLineNo">067</span>import org.apache.hadoop.hbase.HRegionInfo;<a name="line.67"></a>
+<span class="sourceLineNo">068</span>import org.apache.hadoop.hbase.TableName;<a name="line.68"></a>
+<span class="sourceLineNo">069</span>import org.apache.hadoop.hbase.client.RegionInfo;<a name="line.69"></a>
+<span class="sourceLineNo">070</span>import org.apache.hadoop.hbase.exceptions.DeserializationException;<a name="line.70"></a>
+<span class="sourceLineNo">071</span>import org.apache.hadoop.hbase.fs.HFileSystem;<a name="line.71"></a>
+<span class="sourceLineNo">072</span>import org.apache.hadoop.hbase.io.HFileLink;<a name="line.72"></a>
+<span class="sourceLineNo">073</span>import org.apache.hadoop.hbase.master.HMaster;<a name="line.73"></a>
+<span class="sourceLineNo">074</span>import org.apache.hadoop.hbase.regionserver.HRegion;<a name="line.74"></a>
+<span class="sourceLineNo">075</span>import org.apache.hadoop.hbase.regionserver.StoreFileInfo;<a name="line.75"></a>
+<span class="sourceLineNo">076</span>import org.apache.hadoop.hbase.security.AccessDeniedException;<a name="line.76"></a>
+<span class="sourceLineNo">077</span>import org.apache.hadoop.hbase.util.HBaseFsck.ErrorReporter;<a name="line.77"></a>
+<span class="sourceLineNo">078</span>import org.apache.hadoop.hdfs.DFSClient;<a name="line.78"></a>
+<span class="sourceLineNo">079</span>import org.apache.hadoop.hdfs.DFSHedgedReadMetrics;<a name="line.79"></a>
+<span class="sourceLineNo">080</span>import org.apache.hadoop.hdfs.DistributedFileSystem;<a name="line.80"></a>
+<span class="sourceLineNo">081</span>import org.apache.hadoop.hdfs.protocol.HdfsConstants;<a name="line.81"></a>
+<span class="sourceLineNo">082</span>import org.apache.hadoop.io.IOUtils;<a name="line.82"></a>
+<span class="sourceLineNo">083</span>import org.apache.hadoop.ipc.RemoteException;<a name="line.83"></a>
+<span class="sourceLineNo">084</span>import org.apache.hadoop.security.UserGroupInformation;<a name="line.84"></a>
+<span class="sourceLineNo">085</span>import org.apache.hadoop.util.Progressable;<a name="line.85"></a>
+<span class="sourceLineNo">086</span>import org.apache.hadoop.util.ReflectionUtils;<a name="line.86"></a>
+<span class="sourceLineNo">087</span>import org.apache.hadoop.util.StringUtils;<a name="line.87"></a>
+<span class="sourceLineNo">088</span>import org.apache.yetus.audience.InterfaceAudience;<a name="line.88"></a>
+<span class="sourceLineNo">089</span>import org.slf4j.Logger;<a name="line.89"></a>
+<span class="sourceLineNo">090</span>import org.slf4j.LoggerFactory;<a name="line.90"></a>
+<span class="sourceLineNo">091</span><a name="line.91"></a>
+<span class="sourceLineNo">092</span>import org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a name="line.92"></a>
+<span class="sourceLineNo">093</span>import org.apache.hbase.thirdparty.com.google.common.base.Throwables;<a name="line.93"></a>
+<span class="sourceLineNo">094</span>import org.apache.hbase.thirdparty.com.google.common.collect.Iterators;<a name="line.94"></a>
+<span class="sourceLineNo">095</span>import org.apache.hbase.thirdparty.com.google.common.primitives.Ints;<a name="line.95"></a>
+<span class="sourceLineNo">096</span><a name="line.96"></a>
+<span class="sourceLineNo">097</span>import org.apache.hadoop.hbase.shaded.protobuf.ProtobufUtil;<a name="line.97"></a>
+<span class="sourceLineNo">098</span>import org.apache.hadoop.hbase.shaded.protobuf.generated.FSProtos;<a name="line.98"></a>
+<span class="sourceLineNo">099</span><a name="line.99"></a>
+<span class="sourceLineNo">100</span>/**<a name="line.100"></a>
+<span class="sourceLineNo">101</span> * Utility methods for interacting with the underlying file system.<a name="line.101"></a>
+<span class="sourceLineNo">102</span> */<a name="line.102"></a>
+<span class="sourceLineNo">103</span>@InterfaceAudience.Private<a name="line.103"></a>
+<span class="sourceLineNo">104</span>public abstract class FSUtils extends CommonFSUtils {<a name="line.104"></a>
+<span class="sourceLineNo">105</span> private static final Logger LOG = LoggerFactory.getLogger(FSUtils.class);<a name="line.105"></a>
+<span class="sourceLineNo">106</span><a name="line.106"></a>
+<span class="sourceLineNo">107</span> private static final String THREAD_POOLSIZE = "hbase.client.localityCheck.threadPoolSize";<a name="line.107"></a>
+<span class="sourceLineNo">108</span> private static final int DEFAULT_THREAD_POOLSIZE = 2;<a name="line.108"></a>
+<span class="sourceLineNo">109</span><a name="line.109"></a>
+<span class="sourceLineNo">110</span> /** Set to true on Windows platforms */<a name="line.110"></a>
+<span class="sourceLineNo">111</span> @VisibleForTesting // currently only used in testing. TODO refactor into a test class<a name="line.111"></a>
+<span class="sourceLineNo">112</span> public static final boolean WINDOWS = System.getProperty("os.name").startsWith("Windows");<a name="line.112"></a>
+<span class="sourceLineNo">113</span><a name="line.113"></a>
+<span class="sourceLineNo">114</span> protected FSUtils() {<a name="line.114"></a>
+<span class="sourceLineNo">115</span> super();<a name="line.115"></a>
+<span class="sourceLineNo">116</span> }<a name="line.116"></a>
+<span class="sourceLineNo">117</span><a name="line.117"></a>
+<span class="sourceLineNo">118</span> /**<a name="line.118"></a>
+<span class="sourceLineNo">119</span> * @return True is <code>fs</code> is instance of DistributedFileSystem<a name="line.119"></a>
+<span class="sourceLineNo">120</span> * @throws IOException<a name="line.120"></a>
+<span class="sourceLineNo">121</span> */<a name="line.121"></a>
+<span class="sourceLineNo">122</span> public static boolean isDistributedFileSystem(final FileSystem fs) throws IOException {<a name="line.122"></a>
+<span class="sourceLineNo">123</span> FileSystem fileSystem = fs;<a name="line.123"></a>
+<span class="sourceLineNo">124</span> // If passed an instance of HFileSystem, it fails instanceof DistributedFileSystem.<a name="line.124"></a>
+<span class="sourceLineNo">125</span> // Check its backing fs for dfs-ness.<a name="line.125"></a>
+<span class="sourceLineNo">126</span> if (fs instanceof HFileSystem) {<a name="line.126"></a>
+<span class="sourceLineNo">127</span> fileSystem = ((HFileSystem)fs).getBackingFs();<a name="line.127"></a>
+<span class="sourceLineNo">128</span> }<a name="line.128"></a>
+<span class="sourceLineNo">129</span> return fileSystem instanceof DistributedFileSystem;<a name="line.129"></a>
+<span class="sourceLineNo">130</span> }<a name="line.130"></a>
+<span class="sourceLineNo">131</span><a name="line.131"></a>
+<span class="sourceLineNo">132</span> /**<a name="line.132"></a>
+<span class="sourceLineNo">133</span> * Compare path component of the Path URI; e.g. if hdfs://a/b/c and /a/b/c, it will compare the<a name="line.133"></a>
+<span class="sourceLineNo">134</span> * '/a/b/c' part. If you passed in 'hdfs://a/b/c and b/c, it would return true. Does not consider<a name="line.134"></a>
+<span class="sourceLineNo">135</span> * schema; i.e. if schemas different but path or subpath matches, the two will equate.<a name="line.135"></a>
+<span class="sourceLineNo">136</span> * @param pathToSearch Path we will be trying to match.<a name="line.136"></a>
+<span class="sourceLineNo">137</span> * @param pathTail<a name="line.137"></a>
+<span class="sourceLineNo">138</span> * @return True if <code>pathTail</code> is tail on the path of <code>pathToSearch</code><a name="line.138"></a>
+<span class="sourceLineNo">139</span> */<a name="line.139"></a>
+<span class="sourceLineNo">140</span> public static boolean isMatchingTail(final Path pathToSearch, final Path pathTail) {<a name="line.140"></a>
+<span class="sourceLineNo">141</span> if (pathToSearch.depth() != pathTail.depth()) return false;<a name="line.141"></a>
+<span class="sourceLineNo">142</span> Path tailPath = pathTail;<a name="line.142"></a>
+<span class="sourceLineNo">143</span> String tailName;<a name="line.143"></a>
+<span class="sourceLineNo">144</span> Path toSearch = pathToSearch;<a name="line.144"></a>
+<span class="sourceLineNo">145</span> String toSearchName;<a name="line.145"></a>
+<span class="sourceLineNo">146</span> boolean result = false;<a name="line.146"></a>
+<span class="sourceLineNo">147</span> do {<a name="line.147"></a>
+<span class="sourceLineNo">148</span> tailName = tailPath.getName();<a name="line.148"></a>
+<span class="sourceLineNo">149</span> if (tailName == null || tailName.length() <= 0) {<a name="line.149"></a>
+<span class="sourceLineNo">150</span> result = true;<a name="line.150"></a>
+<span class="sourceLineNo">151</span> break;<a name="line.151"></a>
+<span class="sourceLineNo">152</span> }<a name="line.152"></a>
+<span class="sourceLineNo">153</span> toSearchName = toSearch.getName();<a name="line.153"></a>
+<span class="sourceLineNo">154</span> if (toSearchName == null || toSearchName.length() <= 0) break;<a name="line.154"></a>
+<span class="sourceLineNo">155</span> // Move up a parent on each path for next go around. Path doesn't let us go off the end.<a name="line.155"></a>
+<span class="sourceLineNo">156</span> tailPath = tailPath.getParent();<a name="line.156"></a>
+<span class="sourceLineNo">157</span> toSearch = toSearch.getParent();<a name="line.157"></a>
+<span class="sourceLineNo">158</span> } while(tailName.equals(toSearchName));<a name="line.158"></a>
+<span class="sourceLineNo">159</span> return result;<a name="line.159"></a>
+<span class="sourceLineNo">160</span> }<a name="line.160"></a>
+<span class="sourceLineNo">161</span><a name="line.161"></a>
+<span class="sourceLineNo">162</span> public static FSUtils getInstance(FileSystem fs, Configuration conf) {<a name="line.162"></a>
+<span class="sourceLineNo">163</span> String scheme = fs.getUri().getScheme();<a name="line.163"></a>
+<span class="sourceLineNo">164</span> if (scheme == null) {<a name="line.164"></a>
+<span class="sourceLineNo">165</span> LOG.warn("Could not find scheme for uri " +<a name="line.165"></a>
+<span class="sourceLineNo">166</span> fs.getUri() + ", default to hdfs");<a name="line.166"></a>
+<span class="sourceLineNo">167</span> scheme = "hdfs";<a name="line.167"></a>
+<span class="sourceLineNo">168</span> }<a name="line.168"></a>
+<span class="sourceLineNo">169</span> Class<?> fsUtilsClass = conf.getClass("hbase.fsutil." +<a name="line.169"></a>
+<span class="sourceLineNo">170</span> scheme + ".impl", FSHDFSUtils.class); // Default to HDFS impl<a name="line.170"></a>
+<span class="sourceLineNo">171</span> FSUtils fsUtils = (FSUtils)ReflectionUtils.newInstance(fsUtilsClass, conf);<a name="line.171"></a>
+<span class="sourceLineNo">172</span> return fsUtils;<a name="line.172"></a>
+<span class="sourceLineNo">173</span> }<a name="line.173"></a>
+<span class="sourceLineNo">174</span><a name="line.174"></a>
+<span class="sourceLineNo">175</span> /**<a name="line.175"></a>
+<span class="sourceLineNo">176</span> * Delete the region directory if exists.<a name="line.176"></a>
+<span class="sourceLineNo">177</span> * @param conf<a name="line.177"></a>
+<span class="sourceLineNo">178</span> * @param hri<a name="line.178"></a>
+<span class="sourceLineNo">179</span> * @return True if deleted the region directory.<a name="line.179"></a>
+<span class="sourceLineNo">180</span> * @throws IOException<a name="line.180"></a>
+<span class="sourceLineNo">181</span> */<a name="line.181"></a>
+<span class="sourceLineNo">182</span> public static boolean deleteRegionDir(final Configuration conf, final HRegionInfo hri)<a name="line.182"></a>
+<span class="sourceLineNo">183</span> throws IOException {<a name="line.183"></a>
+<span class="sourceLineNo">184</span> Path rootDir = getRootDir(conf);<a name="line.184"></a>
+<span class="sourceLineNo">185</span> FileSystem fs = rootDir.getFileSystem(conf);<a name="line.185"></a>
+<span class="sourceLineNo">186</span> return deleteDirectory(fs,<a name="line.186"></a>
+<span class="sourceLineNo">187</span> new Path(getTableDir(rootDir, hri.getTable()), hri.getEncodedName()));<a name="line.187"></a>
+<span class="sourceLineNo">188</span> }<a name="line.188"></a>
+<span class="sourceLineNo">189</span><a name="line.189"></a>
+<span class="sourceLineNo">190</span> /**<a name="line.190"></a>
+<span class="sourceLineNo">191</span> * Create the specified file on the filesystem. By default, this will:<a name="line.191"></a>
+<span class="sourceLineNo">192</span> * <ol><a name="line.192"></a>
+<span class="sourceLineNo">193</span> * <li>overwrite the file if it exists</li><a name="line.193"></a>
+<span class="sourceLineNo">194</span> * <li>apply the umask in the configuration (if it is enabled)</li><a name="line.194"></a>
+<span class="sourceLineNo">195</span> * <li>use the fs configured buffer size (or 4096 if not set)</li><a name="line.195"></a>
+<span class="sourceLineNo">196</span> * <li>use the configured column family replication or default replication if<a name="line.196"></a>
+<span class="sourceLineNo">197</span> * {@link HColumnDescriptor#DEFAULT_DFS_REPLICATION}</li><a name="line.197"></a>
+<span class="sourceLineNo">198</span> * <li>use the default block size</li><a name="line.198"></a>
+<span class="sourceLineNo">199</span> * <li>not track progress</li><a name="line.199"></a>
+<span class="sourceLineNo">200</span> * </ol><a name="line.200"></a>
+<span class="sourceLineNo">201</span> * @param conf configurations<a name="line.201"></a>
+<span class="sourceLineNo">202</span> * @param fs {@link FileSystem} on which to write the file<a name="line.202"></a>
+<span class="sourceLineNo">203</span> * @param path {@link Path} to the file to write<a name="line.203"></a>
+<span class="sourceLineNo">204</span> * @param perm permissions<a name="line.204"></a>
+<span class="sourceLineNo">205</span> * @param favoredNodes<a name="line.205"></a>
+<span class="sourceLineNo">206</span> * @return output stream to the created file<a name="line.206"></a>
+<span class="sourceLineNo">207</span> * @throws IOException if the file cannot be created<a name="line.207"></a>
+<span class="sourceLineNo">208</span> */<a name="line.208"></a>
+<span class="sourceLineNo">209</span> public static FSDataOutputStream create(Configuration conf, FileSystem fs, Path path,<a name="line.209"></a>
+<span class="sourceLineNo">210</span> FsPermission perm, InetSocketAddress[] favoredNodes) throws IOException {<a name="line.210"></a>
+<span class="sourceLineNo">211</span> if (fs instanceof HFileSystem) {<a name="line.211"></a>
+<span class="sourceLineNo">212</span> FileSystem backingFs = ((HFileSystem)fs).getBackingFs();<a name="line.212"></a>
+<span class="sourceLineNo">213</span> if (backingFs instanceof DistributedFileSystem) {<a name="line.213"></a>
+<span class="sourceLineNo">214</span> // Try to use the favoredNodes version via reflection to allow backwards-<a name="line.214"></a>
+<span class="sourceLineNo">215</span> // compatibility.<a name="line.215"></a>
+<span class="sourceLineNo">216</span> short replication = Short.parseShort(conf.get(HColumnDescriptor.DFS_REPLICATION,<a name="line.216"></a>
+<span class="sourceLineNo">217</span> String.valueOf(HColumnDescriptor.DEFAULT_DFS_REPLICATION)));<a name="line.217"></a>
+<span class="sourceLineNo">218</span> try {<a name="line.218"></a>
+<span class="sourceLineNo">219</span> return (FSDataOutputStream) (DistributedFileSystem.class.getDeclaredMethod("create",<a name="line.219"></a>
+<span class="sourceLineNo">220</span> Path.class, FsPermission.class, boolean.class, int.class, short.class, long.class,<a name="line.220"></a>
+<span class="sourceLineNo">221</span> Progressable.class, InetSocketAddress[].class).invoke(backingFs, path, perm, true,<a name="line.221"></a>
+<span class="sourceLineNo">222</span> getDefaultBufferSize(backingFs),<a name="line.222"></a>
+<span class="sourceLineNo">223</span> replication > 0 ? replication : getDefaultReplication(backingFs, path),<a name="line.223"></a>
+<span class="sourceLineNo">224</span> getDefaultBlockSize(backingFs, path), null, favoredNodes));<a name="line.224"></a>
+<span class="sourceLineNo">225</span> } catch (InvocationTargetException ite) {<a name="line.225"></a>
+<span class="sourceLineNo">226</span> // Function was properly called, but threw it's own exception.<a name="line.226"></a>
+<span class="sourceLineNo">227</span> throw new IOException(ite.getCause());<a name="line.227"></a>
+<span class="sourceLineNo">228</span> } catch (NoSuchMethodException e) {<a name="line.228"></a>
+<span class="sourceLineNo">229</span> LOG.debug("DFS Client does not support most favored nodes create; using default create");<a name="line.229"></a>
+<span class="sourceLineNo">230</span> if (LOG.isTraceEnabled()) LOG.trace("Ignoring; use default create", e);<a name="line.230"></a>
+<span class="sourceLineNo">231</span> } catch (IllegalArgumentException e) {<a name="line.231"></a>
<span class="sourceLineNo">232</span> LOG.debug("Ignoring (most likely Reflection related exception) " + e);<a name="line.232"></a>
-<span class="sourceLineNo">233</span> } catch (IllegalAccessException e) {<a name="line.233"></a>
+<span class="sourceLineNo">233</span> } catch (SecurityException e) {<a name="line.233"></a>
<span class="sourceLineNo">234</span> LOG.debug("Ignoring (most likely Reflection related exception) " + e);<a name="line.234"></a>
-<span class="sourceLineNo">235</span> }<a name="line.235"></a>
-<span class="sourceLineNo">236</span> }<a name="line.236"></a>
-<span class="sourceLineNo">237</span> }<a name="line.237"></a>
-<span class="sourceLineNo">238</span> return create(fs, path, perm, true);<a name="line.238"></a>
-<span class="sourceLineNo">239</span> }<a name="line.239"></a>
-<span class="sourceLineNo">240</span><a name="line.240"></a>
-<span class="sourceLineNo">241</span> /**<a name="line.241"></a>
-<span class="sourceLineNo">242</span> * Checks to see if the specified file system is available<a name="line.242"></a>
-<span class="sourceLineNo">243</span> *<a name="line.243"></a>
-<span class="sourceLineNo">244</span> * @param fs filesystem<a name="line.244"></a>
-<span class="sourceLineNo">245</span> * @throws IOException e<a name="line.245"></a>
-<span class="sourceLineNo">246</span> */<a name="line.246"></a>
-<span class="sourceLineNo">247</span> public static void checkFileSystemAvailable(final FileSystem fs)<a name="line.247"></a>
-<span class="sourceLineNo">248</span> throws IOException {<a name="line.248"></a>
-<span class="sourceLineNo">249</span> if (!(fs instanceof DistributedFileSystem)) {<a name="line.249"></a>
-<span class="sourceLineNo">250</span> return;<a name="line.250"></a>
-<span class="sourceLineNo">251</span> }<a name="line.251"></a>
-<span class="sourceLineNo">252</span> IOException exception = null;<a name="line.252"></a>
-<span class="sourceLineNo">253</span> DistributedFileSystem dfs = (DistributedFileSystem) fs;<a name="line.253"></a>
-<span class="sourceLineNo">254</span> try {<a name="line.254"></a>
-<span class="sourceLineNo">255</span> if (dfs.exists(new Path("/"))) {<a name="line.255"></a>
-<span class="sourceLineNo">256</span> return;<a name="line.256"></a>
-<span class="sourceLineNo">257</span> }<a name="line.257"></a>
-<span class="sourceLineNo">258</span> } catch (IOException e) {<a name="line.258"></a>
-<span class="sourceLineNo">259</span> exception = e instanceof RemoteException ?<a name="line.259"></a>
-<span class="sourceLineNo">260</span> ((RemoteException)e).unwrapRemoteException() : e;<a name="line.260"></a>
-<span class="sourceLineNo">261</span> }<a name="line.261"></a>
-<span class="sourceLineNo">262</span> try {<a name="line.262"></a>
-<span class="sourceLineNo">263</span> fs.close();<a name="line.263"></a>
-<span class="sourceLineNo">264</span> } catch (Exception e) {<a name="line.264"></a>
-<span class="sourceLineNo">265</span> LOG.error("file system close failed: ", e);<a name="line.265"></a>
-<span class="sourceLineNo">266</span> }<a name="line.266"></a>
-<span class="sourceLineNo">267</span> IOException io = new IOException("File system is not available");<a name="line.267"></a>
-<span class="sourceLineNo">268</span> io.initCause(exception);<a name="line.268"></a>
-<span class="sourceLineNo">269</span> throw io;<a name="line.269"></a>
-<span class="sourceLineNo">270</span> }<a name="line.270"></a>
-<span class="sourceLineNo">271</span><a name="line.271"></a>
-<span class="sourceLineNo">272</span> /**<a name="line.272"></a>
-<span class="sourceLineNo">273</span> * We use reflection because {@link DistributedFileSystem#setSafeMode(<a name="line.273"></a>
-<span class="sourceLineNo">274</span> * HdfsConstants.SafeModeAction action, boolean isChecked)} is not in hadoop 1.1<a name="line.274"></a>
-<span class="sourceLineNo">275</span> *<a name="line.275"></a>
-<span class="sourceLineNo">276</span> * @param dfs<a name="line.276"></a>
-<span class="sourceLineNo">277</span> * @return whether we're in safe mode<a name="line.277"></a>
-<span class="sourceLineNo">278</span> * @throws IOException<a name="line.278"></a>
-<span class="sourceLineNo">279</span> */<a name="line.279"></a>
-<span class="sourceLineNo">280</span> private static boolean isInSafeMode(DistributedFileSystem dfs) throws IOException {<a name="line.280"></a>
-<span class="sourceLineNo">281</span> boolean inSafeMode = false;<a name="line.281"></a>
-<span class="sourceLineNo">282</span> try {<a name="line.282"></a>
-<span class="sourceLineNo">283</span> Method m = DistributedFileSystem.class.getMethod("setSafeMode", new Class<?> []{<a name="line.283"></a>
-<span class="sourceLineNo">284</span> org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction.class, boolean.class});<a name="line.284"></a>
-<span class="sourceLineNo">285</span> inSafeMode = (Boolean) m.invoke(dfs,<a name="line.285"></a>
-<span class="sourceLineNo">286</span> org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction.SAFEMODE_GET, true);<a name="line.286"></a>
-<span class="sourceLineNo">287</span> } catch (Exception e) {<a name="line.287"></a>
-<span class="sourceLineNo">288</span> if (e instanceof IOException) throw (IOException) e;<a name="line.288"></a>
-<span class="sourceLineNo">289</span><a name="line.289"></a>
-<span class="sourceLineNo">290</span> // Check whether dfs is on safemode.<a name="line.290"></a>
-<span class="sourceLineNo">291</span> inSafeMode = dfs.setSafeMode(<a name="line.291"></a>
-<span class="sourceLineNo">292</span> org.apache.hadoop.hdfs.protocol.HdfsConstants.SafeModeAction.SAFEMODE_GET);<a name="line.292"></a>
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-<span class="sourceLineNo">294</span> return inSafeMode;<a name="line.294"></a>
-<span class="sourceLineNo">295</span> }<a name="line.295"></a>
-<span class="sourceLineNo">296</span><a name="line.296"></a>
-<span class="sourceLineNo">297</span> /**<a name="line.297"></a>
-<span class="sourceLineNo">298</span> * Check whether dfs is in safemode.<a name="line.298"></a>
-<span class="sourceLineNo">299</span> * @param conf<a name="line.299"></a>
-<span class="sourceLineNo">300</span> * @throws IOException<a name="line.300"></a>
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-<span class="sourceLineNo">303</span> throws IOException {<a name="line.303"></a>
-<span class="sourceLineNo">304</span> boolean isInSafeMode = false;<a name="line.304"></a>
-<span class="sourceLineNo">305</span> FileSystem fs = FileSystem.get(conf);<a name="line.305"></a>
-<span class="sourceLineNo">306</span> if (fs instanceof DistributedFileSystem) {<a name="line.306"></a>
-<span class="sourceLineNo">307</span> DistributedFileSystem dfs = (DistributedFileSystem)fs;<a name="line.307"></a>
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