http://git-wip-us.apache.org/repos/asf/hbase-site/blob/c7c8351c/devapidocs/src-html/org/apache/hadoop/hbase/util/CommonFSUtils.StreamLacksCapabilityException.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/util/CommonFSUtils.StreamLacksCapabilityException.html b/devapidocs/src-html/org/apache/hadoop/hbase/util/CommonFSUtils.StreamLacksCapabilityException.html index 6b83bf9..c6bfdca 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/util/CommonFSUtils.StreamLacksCapabilityException.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/util/CommonFSUtils.StreamLacksCapabilityException.html @@ -59,856 +59,860 @@ <span class="sourceLineNo">051</span><a name="line.51"></a> <span class="sourceLineNo">052</span>/**<a name="line.52"></a> <span class="sourceLineNo">053</span> * Utility methods for interacting with the underlying file system.<a name="line.53"></a> -<span class="sourceLineNo">054</span> */<a name="line.54"></a> -<span class="sourceLineNo">055</span>@InterfaceAudience.Private<a name="line.55"></a> -<span class="sourceLineNo">056</span>public abstract class CommonFSUtils {<a name="line.56"></a> -<span class="sourceLineNo">057</span> private static final Logger LOG = LoggerFactory.getLogger(CommonFSUtils.class);<a name="line.57"></a> -<span class="sourceLineNo">058</span><a name="line.58"></a> -<span class="sourceLineNo">059</span> /** Parameter name for HBase WAL directory */<a name="line.59"></a> -<span class="sourceLineNo">060</span> public static final String HBASE_WAL_DIR = "hbase.wal.dir";<a name="line.60"></a> -<span class="sourceLineNo">061</span><a name="line.61"></a> -<span class="sourceLineNo">062</span> /** Parameter to disable stream capability enforcement checks */<a name="line.62"></a> -<span class="sourceLineNo">063</span> public static final String UNSAFE_STREAM_CAPABILITY_ENFORCE = "hbase.unsafe.stream.capability.enforce";<a name="line.63"></a> -<span class="sourceLineNo">064</span><a name="line.64"></a> -<span class="sourceLineNo">065</span> /** Full access permissions (starting point for a umask) */<a name="line.65"></a> -<span class="sourceLineNo">066</span> public static final String FULL_RWX_PERMISSIONS = "777";<a name="line.66"></a> -<span class="sourceLineNo">067</span><a name="line.67"></a> -<span class="sourceLineNo">068</span> protected CommonFSUtils() {<a name="line.68"></a> -<span class="sourceLineNo">069</span> super();<a name="line.69"></a> -<span class="sourceLineNo">070</span> }<a name="line.70"></a> +<span class="sourceLineNo">054</span> * <p/><a name="line.54"></a> +<span class="sourceLineNo">055</span> * Note that {@link #setStoragePolicy(FileSystem, Path, String)} is tested in TestFSUtils and<a name="line.55"></a> +<span class="sourceLineNo">056</span> * pre-commit will run the hbase-server tests if there's code change in this class. See<a name="line.56"></a> +<span class="sourceLineNo">057</span> * <a href="https://issues.apache.org/jira/browse/HBASE-20838">HBASE-20838</a> for more details.<a name="line.57"></a> +<span class="sourceLineNo">058</span> */<a name="line.58"></a> +<span class="sourceLineNo">059</span>@InterfaceAudience.Private<a name="line.59"></a> +<span class="sourceLineNo">060</span>public abstract class CommonFSUtils {<a name="line.60"></a> +<span class="sourceLineNo">061</span> private static final Logger LOG = LoggerFactory.getLogger(CommonFSUtils.class);<a name="line.61"></a> +<span class="sourceLineNo">062</span><a name="line.62"></a> +<span class="sourceLineNo">063</span> /** Parameter name for HBase WAL directory */<a name="line.63"></a> +<span class="sourceLineNo">064</span> public static final String HBASE_WAL_DIR = "hbase.wal.dir";<a name="line.64"></a> +<span class="sourceLineNo">065</span><a name="line.65"></a> +<span class="sourceLineNo">066</span> /** Parameter to disable stream capability enforcement checks */<a name="line.66"></a> +<span class="sourceLineNo">067</span> public static final String UNSAFE_STREAM_CAPABILITY_ENFORCE = "hbase.unsafe.stream.capability.enforce";<a name="line.67"></a> +<span class="sourceLineNo">068</span><a name="line.68"></a> +<span class="sourceLineNo">069</span> /** Full access permissions (starting point for a umask) */<a name="line.69"></a> +<span class="sourceLineNo">070</span> public static final String FULL_RWX_PERMISSIONS = "777";<a name="line.70"></a> <span class="sourceLineNo">071</span><a name="line.71"></a> -<span class="sourceLineNo">072</span> /**<a name="line.72"></a> -<span class="sourceLineNo">073</span> * Compare of path component. 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Does not consider schema; i.e. if schemas different but path or subpath matches,<a name="line.88"></a> -<span class="sourceLineNo">089</span> * the two will equate.<a name="line.89"></a> -<span class="sourceLineNo">090</span> * @param pathToSearch Path we will be trying to match against.<a name="line.90"></a> -<span class="sourceLineNo">091</span> * @param pathTail what to match<a name="line.91"></a> -<span class="sourceLineNo">092</span> * @return True if <code>pathTail</code> is tail on the path of <code>pathToSearch</code><a name="line.92"></a> -<span class="sourceLineNo">093</span> */<a name="line.93"></a> -<span class="sourceLineNo">094</span> public static boolean isMatchingTail(final Path pathToSearch, String pathTail) {<a name="line.94"></a> -<span class="sourceLineNo">095</span> return isMatchingTail(pathToSearch, new Path(pathTail));<a name="line.95"></a> -<span class="sourceLineNo">096</span> }<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> * 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.99"></a> -<span class="sourceLineNo">100</span> * '/a/b/c' part. If you passed in 'hdfs://a/b/c and b/c, it would return true. 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Does not consider schema; i.e. if schemas different but path or subpath matches,<a name="line.92"></a> +<span class="sourceLineNo">093</span> * the two will equate.<a name="line.93"></a> +<span class="sourceLineNo">094</span> * @param pathToSearch Path we will be trying to match against.<a name="line.94"></a> +<span class="sourceLineNo">095</span> * @param pathTail what to match<a name="line.95"></a> +<span class="sourceLineNo">096</span> * @return True if <code>pathTail</code> is tail on the path of <code>pathToSearch</code><a name="line.96"></a> +<span class="sourceLineNo">097</span> */<a name="line.97"></a> +<span class="sourceLineNo">098</span> public static boolean isMatchingTail(final Path pathToSearch, String pathTail) {<a name="line.98"></a> +<span class="sourceLineNo">099</span> return isMatchingTail(pathToSearch, new Path(pathTail));<a name="line.99"></a> +<span class="sourceLineNo">100</span> }<a name="line.100"></a> +<span class="sourceLineNo">101</span><a name="line.101"></a> +<span class="sourceLineNo">102</span> /**<a name="line.102"></a> +<span class="sourceLineNo">103</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.103"></a> +<span class="sourceLineNo">104</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.104"></a> +<span class="sourceLineNo">105</span> * schema; i.e. if schemas different but path or subpath matches, the two will equate.<a name="line.105"></a> +<span class="sourceLineNo">106</span> * @param pathToSearch Path we will be trying to match agains against<a name="line.106"></a> +<span class="sourceLineNo">107</span> * @param pathTail what to match<a name="line.107"></a> +<span class="sourceLineNo">108</span> * @return True if <code>pathTail</code> is tail on the path of <code>pathToSearch</code><a name="line.108"></a> +<span class="sourceLineNo">109</span> */<a name="line.109"></a> +<span class="sourceLineNo">110</span> public static boolean isMatchingTail(final Path pathToSearch, final Path pathTail) {<a name="line.110"></a> +<span class="sourceLineNo">111</span> if (pathToSearch.depth() != pathTail.depth()) {<a name="line.111"></a> +<span class="sourceLineNo">112</span> return false;<a name="line.112"></a> +<span class="sourceLineNo">113</span> }<a name="line.113"></a> +<span class="sourceLineNo">114</span> Path tailPath = pathTail;<a name="line.114"></a> +<span class="sourceLineNo">115</span> String tailName;<a name="line.115"></a> +<span class="sourceLineNo">116</span> Path toSearch = pathToSearch;<a name="line.116"></a> +<span class="sourceLineNo">117</span> String toSearchName;<a name="line.117"></a> +<span class="sourceLineNo">118</span> boolean result = false;<a name="line.118"></a> +<span class="sourceLineNo">119</span> do {<a name="line.119"></a> +<span class="sourceLineNo">120</span> tailName = tailPath.getName();<a name="line.120"></a> +<span class="sourceLineNo">121</span> if (tailName == null || tailName.length() <= 0) {<a name="line.121"></a> +<span class="sourceLineNo">122</span> result = true;<a name="line.122"></a> <span class="sourceLineNo">123</span> break;<a name="line.123"></a> <span class="sourceLineNo">124</span> }<a name="line.124"></a> -<span class="sourceLineNo">125</span> // Move up a parent on each path for next go around. 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extends FileSystem> cls = fs.getClass();<a name="line.157"></a> -<span class="sourceLineNo">158</span> try {<a name="line.158"></a> -<span class="sourceLineNo">159</span> m = cls.getMethod("getDefaultBlockSize", new Class<?>[] { Path.class });<a name="line.159"></a> -<span class="sourceLineNo">160</span> } catch (NoSuchMethodException e) {<a name="line.160"></a> -<span class="sourceLineNo">161</span> LOG.info("FileSystem doesn't support getDefaultBlockSize");<a name="line.161"></a> -<span class="sourceLineNo">162</span> } catch (SecurityException e) {<a name="line.162"></a> -<span class="sourceLineNo">163</span> LOG.info("Doesn't have access to getDefaultBlockSize on FileSystems", e);<a name="line.163"></a> -<span class="sourceLineNo">164</span> m = null; // could happen on setAccessible()<a name="line.164"></a> -<span class="sourceLineNo">165</span> }<a name="line.165"></a> -<span class="sourceLineNo">166</span> if (m == null) {<a name="line.166"></a> -<span class="sourceLineNo">167</span> return fs.getDefaultBlockSize(path);<a name="line.167"></a> -<span class="sourceLineNo">168</span> } else {<a name="line.168"></a> -<span class="sourceLineNo">169</span> try {<a name="line.169"></a> -<span class="sourceLineNo">170</span> Object ret = m.invoke(fs, path);<a name="line.170"></a> -<span class="sourceLineNo">171</span> return ((Long)ret).longValue();<a name="line.171"></a> -<span class="sourceLineNo">172</span> } catch (Exception e) {<a name="line.172"></a> -<span class="sourceLineNo">173</span> throw new IOException(e);<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> }<a name="line.176"></a> -<span class="sourceLineNo">177</span><a name="line.177"></a> -<span class="sourceLineNo">178</span> /*<a name="line.178"></a> -<span class="sourceLineNo">179</span> * Get the default replication.<a name="line.179"></a> -<span class="sourceLineNo">180</span> *<a name="line.180"></a> -<span class="sourceLineNo">181</span> * use reflection to search for getDefaultReplication(Path f)<a name="line.181"></a> -<span class="sourceLineNo">182</span> * if the method doesn't exist, fall back to using getDefaultReplication()<a name="line.182"></a> -<span class="sourceLineNo">183</span> *<a name="line.183"></a> -<span class="sourceLineNo">184</span> * @param fs filesystem object<a name="line.184"></a> -<span class="sourceLineNo">185</span> * @param f path of file<a name="line.185"></a> -<span class="sourceLineNo">186</span> * @return default replication for the path's filesystem<a name="line.186"></a> -<span class="sourceLineNo">187</span> * @throws IOException e<a name="line.187"></a> -<span class="sourceLineNo">188</span> */<a name="line.188"></a> -<span class="sourceLineNo">189</span> public static short getDefaultReplication(final FileSystem fs, final Path path)<a name="line.189"></a> -<span class="sourceLineNo">190</span> throws IOException {<a name="line.190"></a> -<span class="sourceLineNo">191</span> Method m = null;<a name="line.191"></a> -<span class="sourceLineNo">192</span> Class<? 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new IOException("Root directory does not have a scheme");<a name="line.305"></a> -<span class="sourceLineNo">306</span> }<a name="line.306"></a> -<span class="sourceLineNo">307</span> return root;<a name="line.307"></a> -<span class="sourceLineNo">308</span> } catch (URISyntaxException e) {<a name="line.308"></a> -<span class="sourceLineNo">309</span> IOException io = new IOException("Root directory path is not a valid " +<a name="line.309"></a> -<span class="sourceLineNo">310</span> "URI -- check your " + HConstants.HBASE_DIR + " configuration");<a name="line.310"></a> -<span class="sourceLineNo">311</span> io.initCause(e);<a name="line.311"></a> -<span class="sourceLineNo">312</span> throw io;<a name="line.312"></a> -<span class="sourceLineNo">313</span> }<a name="line.313"></a> -<span class="sourceLineNo">314</span> }<a name="line.314"></a> -<span class="sourceLineNo">315</span><a name="line.315"></a> -<span class="sourceLineNo">316</span> /**<a name="line.316"></a> -<span class="sourceLineNo">317</span> * Checks for the presence of the WAL log root path (using the provided conf object) in the given<a name="line.317"></a> -<span class="sourceLineNo">318</span> * path. If it exists, this method removes it and returns the String representation of remaining<a name="line.318"></a> -<span class="sourceLineNo">319</span> * relative path.<a name="line.319"></a> -<span class="sourceLineNo">320</span> * @param path must not be null<a name="line.320"></a> -<span class="sourceLineNo">321</span> * @param conf must not be null<a name="line.321"></a> -<span class="sourceLineNo">322</span> * @return String representation of the remaining relative path<a name="line.322"></a> -<span class="sourceLineNo">323</span> * @throws IOException from underlying filesystem<a name="line.323"></a> -<span class="sourceLineNo">324</span> */<a name="line.324"></a> -<span class="sourceLineNo">325</span> public static String removeWALRootPath(Path path, final Configuration conf) throws IOException {<a name="line.325"></a> -<span class="sourceLineNo">326</span> Path root = getWALRootDir(conf);<a name="line.326"></a> -<span class="sourceLineNo">327</span> String pathStr = path.toString();<a name="line.327"></a> -<span class="sourceLineNo">328</span> // check that the path is absolute... it has the root path in it.<a name="line.328"></a> -<span class="sourceLineNo">329</span> if (!pathStr.startsWith(root.toString())) {<a name="line.329"></a> -<span class="sourceLineNo">330</span> return pathStr;<a name="line.330"></a> -<span class="sourceLineNo">331</span> }<a name="line.331"></a> -<span class="sourceLineNo">332</span> // if not, return as it is.<a name="line.332"></a> -<span class="sourceLineNo">333</span> return pathStr.substring(root.toString().length() + 1);// remove the "/" too.<a name="line.333"></a> -<span class="sourceLineNo">334</span> }<a name="line.334"></a> -<span class="sourceLineNo">335</span><a name="line.335"></a> -<span class="sourceLineNo">336</span> /**<a name="line.336"></a> -<span class="sourceLineNo">337</span> * Return the 'path' component of a Path. In Hadoop, Path is an URI. 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By default, this will:<a name="line.232"></a> +<span class="sourceLineNo">233</span> * <ol><a name="line.233"></a> +<span class="sourceLineNo">234</span> * <li>apply the umask in the configuration (if it is enabled)</li><a name="line.234"></a> +<span class="sourceLineNo">235</span> * <li>use the fs configured buffer size (or 4096 if not set)</li><a name="line.235"></a> +<span class="sourceLineNo">236</span> * <li>use the default replication</li><a name="line.236"></a> +<span class="sourceLineNo">237</span> * <li>use the default block size</li><a name="line.237"></a> +<span class="sourceLineNo">238</span> * <li>not track progress</li><a name="line.238"></a> +<span class="sourceLineNo">239</span> * </ol><a name="line.239"></a> +<span class="sourceLineNo">240</span> *<a name="line.240"></a> +<span class="sourceLineNo">241</span> * @param fs {@link FileSystem} on which to write the file<a name="line.241"></a> +<span class="sourceLineNo">242</span> * @param path {@link Path} to the file to write<a name="line.242"></a> +<span class="sourceLineNo">243</span> * @param perm intial permissions<a name="line.243"></a> +<span class="sourceLineNo">244</span> * @param overwrite Whether or not the created file should be overwritten.<a name="line.244"></a> +<span class="sourceLineNo">245</span> * @return output stream to the created file<a name="line.245"></a> +<span class="sourceLineNo">246</span> * @throws IOException if the file cannot be created<a name="line.246"></a> +<span class="sourceLineNo">247</span> */<a name="line.247"></a> +<span class="sourceLineNo">248</span> public static FSDataOutputStream create(FileSystem fs, Path path,<a name="line.248"></a> +<span class="sourceLineNo">249</span> FsPermission perm, boolean overwrite) throws IOException {<a name="line.249"></a> +<span class="sourceLineNo">250</span> if (LOG.isTraceEnabled()) {<a name="line.250"></a> +<span class="sourceLineNo">251</span> LOG.trace("Creating file=" + path + " with permission=" + perm + ", overwrite=" + overwrite);<a name="line.251"></a> +<span class="sourceLineNo">252</span> }<a name="line.252"></a> +<span class="sourceLineNo">253</span> return fs.create(path, perm, overwrite, getDefaultBufferSize(fs),<a name="line.253"></a> +<span class="sourceLineNo">254</span> getDefaultReplication(fs, path), getDefaultBlockSize(fs, path), null);<a name="line.254"></a> +<span class="sourceLineNo">255</span> }<a name="line.255"></a> +<span class="sourceLineNo">256</span><a name="line.256"></a> +<span class="sourceLineNo">257</span> /**<a name="line.257"></a> +<span class="sourceLineNo">258</span> * Get the file permissions specified in the configuration, if they are<a name="line.258"></a> +<span class="sourceLineNo">259</span> * enabled.<a name="line.259"></a> +<span class="sourceLineNo">260</span> *<a name="line.260"></a> +<span class="sourceLineNo">261</span> * @param fs filesystem that the file will be created on.<a name="line.261"></a> +<span class="sourceLineNo">262</span> * @param conf configuration to read for determining if permissions are<a name="line.262"></a> +<span class="sourceLineNo">263</span> * enabled and which to use<a name="line.263"></a> +<span class="sourceLineNo">264</span> * @param permssionConfKey property key in the configuration to use when<a name="line.264"></a> +<span class="sourceLineNo">265</span> * finding the permission<a name="line.265"></a> +<span class="sourceLineNo">266</span> * @return the permission to use when creating a new file on the fs. If<a name="line.266"></a> +<span class="sourceLineNo">267</span> * special permissions are not specified in the configuration, then<a name="line.267"></a> +<span class="sourceLineNo">268</span> * the default permissions on the the fs will be returned.<a name="line.268"></a> +<span class="sourceLineNo">269</span> */<a name="line.269"></a> +<span class="sourceLineNo">270</span> public static FsPermission getFilePermissions(final FileSystem fs,<a name="line.270"></a> +<span class="sourceLineNo">271</span> final Configuration conf, final String permssionConfKey) {<a name="line.271"></a> +<span class="sourceLineNo">272</span> boolean enablePermissions = conf.getBoolean(<a name="line.272"></a> +<span class="sourceLineNo">273</span> HConstants.ENABLE_DATA_FILE_UMASK, false);<a name="line.273"></a> +<span class="sourceLineNo">274</span><a name="line.274"></a> +<span class="sourceLineNo">275</span> if (enablePermissions) {<a name="line.275"></a> +<span class="sourceLineNo">276</span> try {<a name="line.276"></a> +<span class="sourceLineNo">277</span> FsPermission perm = new FsPermission(FULL_RWX_PERMISSIONS);<a name="line.277"></a> +<span class="sourceLineNo">278</span> // make sure that we have a mask, if not, go default.<a name="line.278"></a> +<span class="sourceLineNo">279</span> String mask = conf.get(permssionConfKey);<a name="line.279"></a> +<span class="sourceLineNo">280</span> if (mask == null) {<a name="line.280"></a> +<span class="sourceLineNo">281</span> return FsPermission.getFileDefault();<a name="line.281"></a> +<span class="sourceLineNo">282</span> }<a name="line.282"></a> +<span class="sourceLineNo">283</span> // appy the umask<a name="line.283"></a> +<span class="sourceLineNo">284</span> FsPermission umask = new FsPermission(mask);<a name="line.284"></a> +<span class="sourceLineNo">285</span> return perm.applyUMask(umask);<a name="line.285"></a> +<span class="sourceLineNo">286</span> } catch (IllegalArgumentException e) {<a name="line.286"></a> +<span class="sourceLineNo">287</span> LOG.warn(<a name="line.287"></a> +<span class="sourceLineNo">288</span> "Incorrect umask attempted to be created: "<a name="line.288"></a> +<span class="sourceLineNo">289</span> + conf.get(permssionConfKey)<a name="line.289"></a> +<span class="sourceLineNo">290</span> + ", using default file permissions.", e);<a name="line.290"></a> +<span class="sourceLineNo">291</span> return FsPermission.getFileDefault();<a name="line.291"></a> +<span class="sourceLineNo">292</span> }<a name="line.292"></a> +<span class="sourceLineNo">293</span> }<a name="line.293"></a> +<span class="sourceLineNo">294</span> return FsPermission.getFileDefault();<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> * Verifies root directory path is a valid URI with a scheme<a name="line.298"></a> +<span class="sourceLineNo">299</span> *<a name="line.299"></a> +<span class="sourceLineNo">300</span> * @param root root directory path<a name="line.300"></a> +<span class="sourceLineNo">301</span> * @return Passed <code>root</code> argument.<a name="line.301"></a> +<span class="sourceLineNo">302</span> * @throws IOException if not a valid URI with a scheme<a name="line.302"></a> +<span class="sourceLineNo">303</span> */<a name="line.303"></a> +<span class="sourceLineNo">304</span> public static Path validateRootPath(Path root) throws IOException {<a name="line.304"></a> +<span class="sourceLineNo">305</span> try {<a name="line.305"></a> +<span class="sourceLineNo">306</span> URI rootURI = new URI(root.toString());<a name="line.306"></a> +<span class="sourceLineNo">307</span> String scheme = rootURI.getScheme();<a name="line.307"></a> +<span class="sourceLineNo">308</span> if (scheme == null) {<a name="line.308"></a> +<span class="sourceLineNo">309</span> throw new IOException("Root directory does not have a scheme");<a name="line.309"></a> +<span class="sourceLineNo">310</span> }<a name="line.310"></a> +<span class="sourceLineNo">311</span> return root;<a name="line.311"></a> +<span class="sourceLineNo">312</span> } catch (URISyntaxException e) {<a name="line.312"></a> +<span class="sourceLineNo">313</span> IOException io = new IOException("Root directory path is not a valid " +<a name="line.313"></a> +<span class="sourceLineNo">314</span> "URI -- check your " + HConstants.HBASE_DIR + " configuration");<a name="line.314"></a> +<span class="sourceLineNo">315</span> io.initCause(e);<a name="line.315"></a> +<span class="sourceLineNo">316</span> throw io;<a name="line.316"></a> +<span class="sourceLineNo">317</span> }<a name="line.317"></a> +<span class="sourceLineNo">318</span> }<a name="line.318"></a> +<span class="sourceLineNo">319</span><a name="line.319"></a> +<span class="sourceLineNo">320</span> /**<a name="line.320"></a> +<span class="sourceLineNo">321</span> * Checks for the presence of the WAL log root path (using the provided conf object) in the given<a name="line.321"></a> +<span class="sourceLineNo">322</span> * path. If it exists, this method removes it and returns the String representation of remaining<a name="line.322"></a> +<span class="sourceLineNo">323</span> * relative path.<a name="line.323"></a> +<span class="sourceLineNo">324</span> * @param path must not be null<a name="line.324"></a> +<span class="sourceLineNo">325</span> * @param conf must not be null<a name="line.325"></a> +<span class="sourceLineNo">326</span> * @return String representation of the remaining relative path<a name="line.326"></a> +<span class="sourceLineNo">327</span> * @throws IOException from underlying filesystem<a name="line.327"></a> +<span class="sourceLineNo">328</span> */<a name="line.328"></a> +<span class="sourceLineNo">329</span> public static String removeWALRootPath(Path path, final Configuration conf) throws IOException {<a name="line.329"></a> +<span class="sourceLineNo">330</span> Path root = getWALRootDir(conf);<a name="line.330"></a> +<span class="sourceLineNo">331</span> String pathStr = path.toString();<a name="line.331"></a> +<span class="sourceLineNo">332</span> // check that the path is absolute... it has the root path in it.<a name="line.332"></a> +<span class="sourceLineNo">333</span> if (!pathStr.startsWith(root.toString())) {<a name="line.333"></a> +<span class="sourceLineNo">334</span> return pathStr;<a name="line.334"></a> +<span class="sourceLineNo">335</span> }<a name="line.335"></a> +<span class="sourceLineNo">336</span> // if not, return as it is.<a name="line.336"></a> +<span class="sourceLineNo">337</span> return pathStr.substring(root.toString().length() + 1);// remove the "/" too.<a name="line.337"></a> +<span class="sourceLineNo">338</span> }<a name="line.338"></a> +<span class="sourceLineNo">339</span><a name="line.339"></a> +<span class="sourceLineNo">340</span> /**<a name="line.340"></a> +<span class="sourceLineNo">341</span> * Return the 'path' component of a Path. In Hadoop, Path is an URI. This<a name="line.341"></a> +<span class="sourceLineNo">342</span> * method returns the 'path' component of a Path's URI: e.g. If a Path is<a name="line.342"></a> +<span class="sourceLineNo">343</span> * <code>hdfs://example.org:9000/hbase_trunk/TestTable/compaction.dir</code>,<a name="line.343"></a> +<span class="sourceLineNo">344</span> * this method returns <code>/hbase_trunk/TestTable/compaction.dir</code>.<a name="line.344"></a> +<span class="sourceLineNo">345</span> * This method is useful if you want to print out a Path without qualifying<a name="line.345"></a> +<span class="sourceLineNo">346</span> * Filesystem instance.<a name="line.346"></a> +<span class="sourceLineNo">347</span> * @param p Filesystem Path whose 'path' component we are to return.<a name="line.347"></a> +<span class="sourceLineNo">348</span> * @return Path portion of the Filesystem<a name="line.348"></a> +<span class="sourceLineNo">349</span> */<a name="line.349"></a> +<span class="sourceLineNo">350</span> public static String getPath(Path p) {<a name="line.350"></a> +<span class="sourceLineNo">351</span> return p.toUri().getPath();<a name="line.351"></a> +<span class="sourceLineNo">352</span> }<a name="line.352"></a> +<span class="sourceLineNo">353</span><a name="line.353"></a> +<span class="sourceLineNo">354</span> /**<a name="line.354"></a> +<span class="sourceLineNo">355</span> * @param c configuration<a name="line.355"></a> +<span class="sourceLineNo">356</span> * @return {@link Path} to hbase root directory from<a name="line.356"></a> +<span class="sourceLineNo">357</span> * configuration as a qualified Path.<a name="line.357"></a> +<span class="sourceLineNo">358</span> * @throws IOException e<a name="line.358"></a> +<span class="sourceLineNo">359</span> */<a name="line.359"></a> +<span class="sourceLineNo">360</span> public static Path getRootDir(final Configuration c) throws IOException {<a name="line.360"></a> +<span class="sourceLineNo">361</span> Path p = new Path(c.get(HConstants.HBASE_DIR));<a name="line.361"></a> +<span class="sourceLineNo">362</span> FileSystem fs = p.getFileSystem(c);<a name="line.362"></a> +<span class="sourceLineNo">363</span> return p.makeQualified(fs.getUri(), fs.getWorkingDirectory());<a name="line.363"></a> <span class="sourceLineNo">364</span> }<a name="line.364"></a> <span class="sourceLineNo">365</span><a name="line.365"></a> -<span class="sourceLineNo">366</span> public static void setFsDefault(final Configuration c, final Path root) throws IOException {<a name="line.366"></a> -<span class="sourceLineNo">367</span> c.set("fs.defaultFS", root.toString()); // for hadoop 0.21+<a name="line.367"></a> +<span class="sourceLineNo">366</span> public static void setRootDir(final Configuration c, final Path root) throws IOException {<a name="line.366"></a> +<span class="sourceLineNo">367</span> c.set(HConstants.HBASE_DIR, root.toString());<a name="line.367"></a> <span class="sourceLineNo">368</span> }<a name="line.368"></a> <span class="sourceLineNo">369</span><a name="line.369"></a> -<span class="sourceLineNo">370</span> public static FileSystem getRootDirFileSystem(final Configuration c) throws IOException {<a name="line.370"></a> -<span class="sourceLineNo">371</span> Path p = getRootDir(c);<a name="line.371"></a> -<span class="sourceLineNo">372</span> return p.getFileSystem(c);<a name="line.372"></a> -<span class="sourceLineNo">373</span> }<a name="line.373"></a> -<span class="sourceLineNo">374</span><a name="line.374"></a> -<span class="sourceLineNo">375</span> /**<a name="line.375"></a> -<span class="sourceLineNo">376</span> * @param c configuration<a name="line.376"></a> -<span class="sourceLineNo">377</span> * @return {@link Path} to hbase log root directory: e.g. {@value HBASE_WAL_DIR} from<a name="line.377"></a> -<span class="sourceLineNo">378</span> * configuration as a qualified Path. Defaults to HBase root dir.<a name="line.378"></a> -<span class="sourceLineNo">379</span> * @throws IOException e<a name="line.379"></a> -<span class="sourceLineNo">380</span> */<a name="line.380"></a> -<span class="sourceLineNo">381</span> public static Path getWALRootDir(final Configuration c) throws IOException {<a name="line.381"></a> -<span class="sourceLineNo">382</span> Path p = new Path(c.get(HBASE_WAL_DIR, c.get(HConstants.HBASE_DIR)));<a name="line.382"></a> -<span class="sourceLineNo">383</span> if (!isValidWALRootDir(p, c)) {<a name="line.383"></a> -<span class="sourceLineNo">384</span> return getRootDir(c);<a name="line.384"></a> -<span class="sourceLineNo">385</span> }<a name="line.385"></a> -<span class="sourceLineNo">386</span> FileSystem fs = p.getFileSystem(c);<a name="line.386"></a> -<span class="sourceLineNo">387</span> return p.makeQualified(fs.getUri(), fs.getWorkingDirectory());<a name="line.387"></a> -<span class="sourceLineNo">388</span> }<a name="line.388"></a> -<span class="sourceLineNo">389</span><a name="line.389"></a> -<span class="sourceLineNo">390</span> @VisibleForTesting<a name="line.390"></a> -<span class="sourceLineNo">391</span> public static void setWALRootDir(final Configuration c, final Path root) throws IOException {<a name="line.391"></a> -<span class="sourceLineNo">392</span> c.set(HBASE_WAL_DIR, root.toString());<a name="line.392"></a> -<span class="sourceLineNo">393</span> }<a name="line.393"></a> -<span class="sourceLineNo">394</span><a name="line.394"></a> -<span class="sourceLineNo">395</span> public static FileSystem getWALFileSystem(final Configuration c) throws IOException {<a name="line.395"></a> -<span class="sourceLineNo">396</span> Path p = getWALRootDir(c);<a name="line.396"></a> -<span class="sourceLineNo">397</span> FileSystem fs = p.getFileSystem(c);<a name="line.397"></a> -<span class="sourceLineNo">398</span> // hadoop-core does fs caching, so need to propogate this if set<a name="line.398"></a> -<span class="sourceLineNo">399</span> String enforceStreamCapability = c.get(UNSAFE_STREAM_CAPABILITY_ENFORCE);<a name="line.399"></a> -<span class="sourceLineNo">400</span> if (enforceStreamCapability != null) {<a name="line.400"></a> -<span class="sourceLineNo">401</span> fs.getConf().set(UNSAFE_STREAM_CAPABILITY_ENFORCE, enforceStreamCapability);<a name="line.401"></a> -<span class="sourceLineNo">402</span> }<a name="line.402"></a> -<span class="sourceLineNo">403</span> return fs;<a name="line.403"></a> -<span class="sourceLineNo">404</span> }<a name="line.404"></a> -<span class="sourceLineNo">405</span><a name="line.405"></a> -<span class="sourceLineNo">406</span> private static boolean isValidWALRootDir(Path walDir, final Configuration c) throws IOException {<a name="line.406"></a> -<span class="sourceLineNo">407</span> Path rootDir = getRootDir(c);<a name="line.407"></a> -<span class="sourceLineNo">408</span> FileSystem fs = walDir.getFileSystem(c);<a name="line.408"></a> -<span class="sourceLineNo">409</span> Path qualifiedWalDir = walDir.makeQualified(fs.getUri(), fs.getWorkingDirectory());<a name="line.409"></a> -<span class="sourceLineNo">410</span> if (!qualifiedWalDir.equals(rootDir)) {<a name="line.410"></a> -<span class="sourceLineNo">411</span> if (qualifiedWalDir.toString().startsWith(rootDir.toString() + "/")) {<a name="line.411"></a> -<span class="sourceLineNo">412</span> throw new IllegalStateException("Illegal WAL directory specified. " +<a name="line.412"></a> -<span class="sourceLineNo">413</span> "WAL directories are not permitted to be under the root directory if set.");<a name="line.413"></a> -<span class="sourceLineNo">414</span> }<a name="line.414"></a> -<span class="sourceLineNo">415</span> }<a name="line.415"></a> -<span class="sourceLineNo">416</span> return true;<a name="line.416"></a> -<span class="sourceLineNo">417</span> }<a name="line.417"></a> -<span class="sourceLineNo">418</span><a name="line.418"></a> -<span class="sourceLineNo">419</span> /**<a name="line.419"></a> -<span class="sourceLineNo">420</span> * Returns the {@link org.apache.hadoop.fs.Path} object representing the table directory under<a name="line.420"></a> -<span class="sourceLineNo">421</span> * path rootdir<a name="line.421"></a> -<span class="sourceLineNo">422</span> *<a name="line.422"></a> -<span class="sourceLineNo">423</span> * @param rootdir qualified path of HBase root directory<a name="line.423"></a> -<span 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class="sourceLineNo">434</span> * the table directory under<a name="line.434"></a> -<span class="sourceLineNo">435</span> * path rootdir<a name="line.435"></a> -<span class="sourceLineNo">436</span> *<a name="line.436"></a> -<span class="sourceLineNo">437</span> * @param tablePath path of table<a name="line.437"></a> -<span class="sourceLineNo">438</span> * @return {@link org.apache.hadoop.fs.Path} for table<a name="line.438"></a> -<span class="sourceLineNo">439</span> */<a name="line.439"></a> -<span class="sourceLineNo">440</span> public static TableName getTableName(Path tablePath) {<a name="line.440"></a> -<span class="sourceLineNo">441</span> return TableName.valueOf(tablePath.getParent().getName(), tablePath.getName());<a name="line.441"></a> -<span class="sourceLineNo">442</span> }<a name="line.442"></a> -<span class="sourceLineNo">443</span><a name="line.443"></a> -<span class="sourceLineNo">444</span> /**<a name="line.444"></a> -<span class="sourceLineNo">445</span> * Returns the {@link org.apache.hadoop.fs.Path} object representing<a name="line.445"></a> -<span class="sourceLineNo">446</span> * the namespace directory under path rootdir<a name="line.446"></a> -<span class="sourceLineNo">447</span> *<a name="line.447"></a> -<span class="sourceLineNo">448</span> * @param rootdir qualified path of HBase root directory<a name="line.448"></a> -<span class="sourceLineNo">449</span> * @param namespace namespace name<a name="line.449"></a> -<span class="sourceLineNo">450</span> * @return {@link org.apache.hadoop.fs.Path} for table<a name="line.450"></a> -<span class="sourceLineNo">451</span> */<a name="line.451"></a> -<span class="sourceLineNo">452</span> public static Path getNamespaceDir(Path rootdir, final String namespace) {<a name="line.452"></a> -<span class="sourceLineNo">453</span> return new Path(rootdir, new Path(HConstants.BASE_NAMESPACE_DIR,<a name="line.453"></a> -<span class="sourceLineNo">454</span> new Path(namespace)));<a name="line.454"></a> -<span class="sourceLineNo">455</span> }<a name="line.455"></a> -<span class="sourceLineNo">456</span><a name="line.456"></a> -<span class="sourceLineNo">457</span> // this mapping means that under a federated FileSystem implementation, we'll<a name="line.457"></a> -<span class="sourceLineNo">458</span> // only log the first failure from any of the underlying FileSystems at WARN and all others<a name="line.458"></a> -<span class="sourceLineNo">459</span> // will be at DEBUG.<a name="line.459"></a> -<span class="sourceLineNo">460</span> private static final Map<FileSystem, Boolean> warningMap =<a name="line.460"></a> -<span class="sourceLineNo">461</span> new ConcurrentHashMap<FileSystem, Boolean>();<a name="line.461"></a> -<span class="sourceLineNo">462</span><a name="line.462"></a> -<span class="sourceLineNo">463</span> /**<a name="line.463"></a> -<span class="sourceLineNo">464</span> * Sets storage policy for given path.<a name="line.464"></a> -<span class="sourceLineNo">465</span> * If the passed path is a directory, we'll set the storage policy for all files<a name="line.465"></a> -<span class="sourceLineNo">466</span> * created in the future in said directory. 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see hadoop 2.6+<a name="line.475"></a> -<span class="sourceLineNo">476</span> * org.apache.hadoop.hdfs.protocol.HdfsConstants for possible list e.g<a name="line.476"></a> -<span class="sourceLineNo">477</span> * 'COLD', 'WARM', 'HOT', 'ONE_SSD', 'ALL_SSD', 'LAZY_PERSIST'.<a name="line.477"></a> -<span class="sourceLineNo">478</span> */<a name="line.478"></a> -<span class="sourceLineNo">479</span> public static void setStoragePolicy(final FileSystem fs, final Path path,<a name="line.479"></a> -<span class="sourceLineNo">480</span> final String storagePolicy) {<a name="line.480"></a> -<span class="sourceLineNo">481</span> try {<a name="line.481"></a> -<span class="sourceLineNo">482</span> setStoragePolicy(fs, path, storagePolicy, false);<a name="line.482"></a> -<span class="sourceLineNo">483</span> } catch (IOException e) {<a name="line.483"></a> -<span class="sourceLineNo">484</span> // should never arrive here<a name="line.484"></a> -<span class="sourceLineNo">485</span> LOG.warn("We have chosen not to throw exception but some unexpectedly thrown out", e);<a name="line.485"></a> -<span class="sourceLineNo">486</span> }<a name="line.486"></a> -<span class="sourceLineNo">487</span> }<a name="line.487"></a> -<span class="sourceLineNo">488</span><a name="line.488"></a> -<span class="sourceLineNo">489</span> static void setStoragePolicy(final FileSystem fs, final Path path, final String storagePolicy,<a name="line.489"></a> -<span class="sourceLineNo">490</span> boolean throwException) throws IOException {<a name="line.490"></a> -<span class="sourceLineNo">491</span> if (storagePolicy == null) {<a name="line.491"></a> -<span class="sourceLineNo">492</span> if (LOG.isTraceEnabled()) {<a name="line.492"></a> -<span class="sourceLineNo">493</span> LOG.trace("We were passed a null storagePolicy, exiting early.");<a name="line.493"></a> -<span class="sourceLineNo">494</span> }<a name="line.494"></a> -<span class="sourceLineNo">495</span> return;<a name="line.495"></a> -<span class="sourceLineNo">496</span> }<a name="line.496"></a> -<span class="sourceLineNo">497</span> String trimmedStoragePolicy = storagePolicy.trim();<a name="line.497"></a> -<span class="sourceLineNo">498</span> if (trimmedStoragePolicy.isEmpty()) {<a name="line.498"></a> -<span class="sourceLineNo">499</span> if (LOG.isTraceEnabled()) {<a name="line.499"></a> -<span class="sourceLineNo">500</span> LOG.trace("We were passed an empty storagePolicy, exiting early.");<a name="line.500"></a> -<span class="sourceLineNo">501</span> }<a name="line.501"></a> -<span class="sourceLineNo">502</span> return;<a name="line.502"></a> -<span class="sourceLineNo">503</span> } else {<a name="line.503"></a> -<span class="sourceLineNo">504</span> trimmedStoragePolicy = trimmedStoragePolicy.toUpperCase(Locale.ROOT);<a name="line.504"></a> -<span class="sourceLineNo">505</span> }<a name="line.505"></a> -<span class="sourceLineNo">506</span> if (trimmedStoragePolicy.equals(HConstants.DEFER_TO_HDFS_STORAGE_POLICY)) {<a name="line.506"></a> -<span class="sourceLineNo">507</span> if (LOG.isTraceEnabled()) {<a name="line.507"></a> -<span class="sourceLineNo">508</span> LOG.trace("We were passed the defer-to-hdfs policy {}, exiting early.",<a name="line.508"></a> -<span class="sourceLineNo">509</span> trimmedStoragePolicy);<a name="line.509"></a> -<span class="sourceLineNo">510</span> }<a name="line.510"></a> -<span class="sourceLineNo">511</span> return;<a name="line.511"></a> -<span class="sourceLineNo">512</span> }<a name="line.512"></a> -<span class="sourceLineNo">513</span> try {<a name="line.513"></a> -<span class="sourceLineNo">514</span> invokeSetStoragePolicy(fs, path, trimmedStoragePolicy);<a name="line.514"></a> -<span class="sourceLineNo">515</span> } catch (IOException e) {<a name="line.515"></a> -<span class="sourceLineNo">516</span> if (LOG.isTraceEnabled()) {<a name="line.516"></a> -<span class="sourceLineNo">517</span> LOG.trace("Failed to invoke set storage policy API on FS", e);<a name="line.517"></a> -<span class="sourceLineNo">518</span> }<a name="line.518"></a> -<span class="sourceLineNo">519</span> if (throwException) {<a name="line.519"></a> -<span class="sourceLineNo">520</span> throw e;<a name="line.520"></a> -<span class="sourceLineNo">521</span> }<a name="line.521"></a> -<span class="sourceLineNo">522</span> }<a name="line.522"></a> -<span class="sourceLineNo">523</span> }<a name="line.523"></a> -<span class="sourceLineNo">524</span><a name="line.524"></a> -<span class="sourceLineNo">525</span> /*<a name="line.525"></a> -<span class="sourceLineNo">526</span> * All args have been checked and are good. 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Logs around service " +<a name="line.552"></a> -<span class="sourceLineNo">553</span> "start up will probably be useful as well.";<a name="line.553"></a> -<span class="sourceLineNo">554</span> if (!warningMap.containsKey(fs)) {<a name="line.554"></a> -<span class="sourceLineNo">555</span> warningMap.put(fs, true);<a name="line.555"></a> -<span class="sourceLineNo">556</span> LOG.warn(msg, e);<a name="line.556"></a> -<span class="sourceLineNo">557</span> } else if (LOG.isDebugEnabled()) {<a name="line.557"></a> -<span class="sourceLineNo">558</span> LOG.debug(msg, e);<a name="line.558"></a> -<span class="sourceLineNo">559</span> }<a name="line.559"></a> -<span class="sourceLineNo">560</span> m = null; // could happen on setAccessible() or getDeclaredMethod()<a name="line.560"></a> -<span class="sourceLineNo">561</span> }<a name="line.561"></a> -<span class="sourceLineNo">562</span> if (m != null) {<a name="line.562"></a> -<span class="sourceLineNo">563</span> try {<a name="line.563"></a> -<span class="sourceLineNo">564</span> m.invoke(fs, path, storagePolicy);<a name="line.564"></a> -<span class="sourceLineNo">565</span> if (LOG.isDebugEnabled()) {<a name="line.565"></a> -<span class="sourceLineNo">566</span> LOG.debug("Set storagePolicy=" + storagePolicy + " for path=" + path);<a name="line.566"></a> -<span class="sourceLineNo">567</span> }<a name="line.567"></a> -<span class="sourceLineNo">568</span> } catch (Exception e) {<a name="line.568"></a> -<span class="sourceLineNo">569</span> toThrow = e;<a name="line.569"></a> -<span class="sourceLineNo">570</span> // This swallows FNFE, should we be throwing it? seems more likely to indicate dev<a name="line.570"></a> -<span class="sourceLineNo">571</span> // misuse than a runtime problem with HDFS.<a name="line.571"></a> -<span class="sourceLineNo">572</span> if (!warningMap.containsKey(fs)) {<a name="line.572"></a> -<span class="sourceLineNo">573</span> warningMap.put(fs, true);<a name="line.573"></a> -<span class="sourceLineNo">574</span> LOG.warn("Unable to set storagePolicy=" + storagePolicy + " for path=" + path + ". " +<a name="line.574"></a> -<span class="sourceLineNo">575</span> "DEBUG log level might have more details.", e);<a name="line.575"></a> -<span class="sourceLineNo">576</span> } else if (LOG.isDebugEnabled()) {<a name="line.576"></a> -<span class="sourceLineNo">577</span> LOG.debug("Unable to set storagePolicy=" + storagePolicy + " for path=" + path, e);<a name="line.577"></a> -<span class="sourceLineNo">578</span> }<a name="line.578"></a> -<span class="sourceLineNo">579</span> // check for lack of HDFS-7228<a name="line.579"></a> -<span class="sourceLineNo">580</span> if (e instanceof InvocationTargetException) {<a name="line.580"></a> -<span class="sourceLineNo">581</span> final Throwable exception = e.getCause();<a name="line.581"></a> -<span class="sourceLineNo">582</span> if (exception instanceof RemoteException &&<a name="line.582"></a> -<span class="sourceLineNo">583</span> HadoopIllegalArgumentException.class.getName().equals(<a name="line.583"></a> -<span class="sourceLineNo">584</span> ((RemoteException)exception).getClassName())) {<a name="line.584"></a> -<span class="sourceLineNo">585</span> if (LOG.isDebugEnabled()) {<a name="line.585"></a> -<span class="sourceLineNo">586</span> LOG.debug("Given storage policy, '" +storagePolicy +"', was rejected and probably " +<a name="line.586"></a> -<span class="sourceLineNo">587</span> "isn't a valid policy for the version of Hadoop you're running. I.e. if you're " +<a name="line.587"></a> -<span class="sourceLineNo">588</span> "trying to use SSD related policies then you're likely missing HDFS-7228. For " +<a name="line.588"></a> -<span class="sourceLineNo">589</span> "more information see the 'ArchivalStorage' docs for your Hadoop release.");<a name="line.589"></a> -<span class="sourceLineNo">590</span> }<a name="line.590"></a> -<span class="sourceLineNo">591</span> // Hadoop 2.8+, 3.0-a1+ added FileSystem.setStoragePolicy with a default implementation<a name="line.591"></a> -<span class="sourceLineNo">592</span> // that throws UnsupportedOperationException<a name="line.592"></a> -<span class="sourceLineNo">593</span> } else if (exception instanceof UnsupportedOperationException) {<a name="line.593"></a> -<span class="sourceLineNo">594</span> if (LOG.isDebugEnabled()) {<a name="line.594"></a> -<span class="sourceLineNo">595</span> LOG.debug("The underlying FileSystem implementation doesn't support " +<a name="line.595"></a> -<span class="sourceLineNo">596</span> "setStoragePolicy. This is probably intentional on their part, since HDFS-9345 " +<a name="line.596"></a> -<span class="sourceLineNo">597</span> "appears to be present in your version of Hadoop. For more information check " +<a name="line.597"></a> -<span class="sourceLineNo">598</span> "the Hadoop documentation on 'ArchivalStorage', the Hadoop FileSystem " +<a name="line.598"></a> -<span class="sourceLineNo">599</span> "specification docs from HADOOP-11981, and/or related documentation from the " +<a name="line.599"></a> -<span class="sourceLineNo">600</span> "provider of the underlying FileSystem (its name should appear in the " +<a name="line.600"></a> -<span class="sourceLineNo">601</span> "stacktrace that accompanies this message). Note in particular that Hadoop's " +<a name="line.601"></a> -<span class="sourceLineNo">602</span> "local filesystem implementation doesn't support storage policies.", exception);<a name="line.602"></a> -<span class="sourceLineNo">603</span> }<a name="line.603"></a> -<span class="sourceLineNo">604</span> }<a name="line.604"></a> -<span class="sourceLineNo">605</span> }<a name="line.605"></a> -<span class="sourceLineNo">606</span> }<a name="line.606"></a> -<span class="sourceLineNo">607</span> }<a name="line.607"></a> -<span class="sourceLineNo">608</span> if (toThrow != null) {<a name="line.608"></a> -<span class="sourceLineNo">609</span> throw new IOException(toThrow);<a name="line.609"></a> -<span class="sourceLineNo">610</span> }<a name="line.610"></a> -<span class="sourceLineNo">611</span> }<a name="line.611"></a> -<span class="sourceLineNo">612</span><a name="line.612"></a> -<span class="sourceLineNo">613</span> /**<a name="line.613"></a> -<span class="sourceLineNo">614</span> * @param conf must not be null<a name="line.614"></a> -<span class="sourceLineNo">615</span> * @return True if this filesystem whose scheme is 'hdfs'.<a name="line.615"></a> -<span class="sourceLineNo">616</span> * @throws IOException from underlying FileSystem<a name="line.616"></a> -<span class="sourceLineNo">617</span> */<a name="line.617"></a> -<span class="sourceLineNo">618</span> public static boolean isHDFS(final Configuration conf) throws IOException {<a name="line.618"></a> -<span class="sourceLineNo">619</span> FileSystem fs = FileSystem.get(conf);<a name="line.619"></a> -<span class="sourceLineNo">620</span> String scheme = fs.getUri().getScheme();<a nam
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