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Posted to commits@hbase.apache.org by mi...@apache.org on 2016/02/01 17:57:03 UTC
[07/51] [partial] hbase-site git commit: Published site at
2cc48e039d1f800832ac8880bbc820982e0ac8a5.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/a7e5a8ce/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.HFileScannerImpl.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.HFileScannerImpl.html b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.HFileScannerImpl.html
index e8248d4..c36648a 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.HFileScannerImpl.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/io/hfile/HFileReaderImpl.HFileScannerImpl.html
@@ -59,1847 +59,1848 @@
<span class="sourceLineNo">051</span>import org.apache.hadoop.hbase.io.encoding.HFileBlockDecodingContext;<a name="line.51"></a>
<span class="sourceLineNo">052</span>import org.apache.hadoop.hbase.io.hfile.HFile.FileInfo;<a name="line.52"></a>
<span class="sourceLineNo">053</span>import org.apache.hadoop.hbase.nio.ByteBuff;<a name="line.53"></a>
-<span class="sourceLineNo">054</span>import org.apache.hadoop.hbase.security.EncryptionUtil;<a name="line.54"></a>
-<span class="sourceLineNo">055</span>import org.apache.hadoop.hbase.util.ByteBufferUtils;<a name="line.55"></a>
-<span class="sourceLineNo">056</span>import org.apache.hadoop.hbase.util.Bytes;<a name="line.56"></a>
-<span class="sourceLineNo">057</span>import org.apache.hadoop.hbase.util.IdLock;<a name="line.57"></a>
-<span class="sourceLineNo">058</span>import org.apache.hadoop.hbase.util.ObjectIntPair;<a name="line.58"></a>
-<span class="sourceLineNo">059</span>import org.apache.hadoop.io.WritableUtils;<a name="line.59"></a>
-<span class="sourceLineNo">060</span>import org.apache.htrace.Trace;<a name="line.60"></a>
-<span class="sourceLineNo">061</span>import org.apache.htrace.TraceScope;<a name="line.61"></a>
-<span class="sourceLineNo">062</span><a name="line.62"></a>
-<span class="sourceLineNo">063</span>import com.google.common.annotations.VisibleForTesting;<a name="line.63"></a>
-<span class="sourceLineNo">064</span><a name="line.64"></a>
-<span class="sourceLineNo">065</span>/**<a name="line.65"></a>
-<span class="sourceLineNo">066</span> * Implementation that can handle all hfile versions of {@link HFile.Reader}.<a name="line.66"></a>
-<span class="sourceLineNo">067</span> */<a name="line.67"></a>
-<span class="sourceLineNo">068</span>@InterfaceAudience.Private<a name="line.68"></a>
-<span class="sourceLineNo">069</span>@edu.umd.cs.findbugs.annotations.SuppressWarnings(value="URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")<a name="line.69"></a>
-<span class="sourceLineNo">070</span>public class HFileReaderImpl implements HFile.Reader, Configurable {<a name="line.70"></a>
-<span class="sourceLineNo">071</span> // This class is HFileReaderV3 + HFileReaderV2 + AbstractHFileReader all squashed together into<a name="line.71"></a>
-<span class="sourceLineNo">072</span> // one file. Ditto for all the HFileReader.ScannerV? implementations. I was running up against<a name="line.72"></a>
-<span class="sourceLineNo">073</span> // the MaxInlineLevel limit because too many tiers involved reading from an hfile. Was also hard<a name="line.73"></a>
-<span class="sourceLineNo">074</span> // to navigate the source code when so many classes participating in read.<a name="line.74"></a>
-<span class="sourceLineNo">075</span> private static final Log LOG = LogFactory.getLog(HFileReaderImpl.class);<a name="line.75"></a>
-<span class="sourceLineNo">076</span><a name="line.76"></a>
-<span class="sourceLineNo">077</span> /** Data block index reader keeping the root data index in memory */<a name="line.77"></a>
-<span class="sourceLineNo">078</span> private HFileBlockIndex.CellBasedKeyBlockIndexReader dataBlockIndexReader;<a name="line.78"></a>
-<span class="sourceLineNo">079</span><a name="line.79"></a>
-<span class="sourceLineNo">080</span> /** Meta block index reader -- always single level */<a name="line.80"></a>
-<span class="sourceLineNo">081</span> private HFileBlockIndex.ByteArrayKeyBlockIndexReader metaBlockIndexReader;<a name="line.81"></a>
-<span class="sourceLineNo">082</span><a name="line.82"></a>
-<span class="sourceLineNo">083</span> private final FixedFileTrailer trailer;<a name="line.83"></a>
-<span class="sourceLineNo">084</span><a name="line.84"></a>
-<span class="sourceLineNo">085</span> /** Filled when we read in the trailer. */<a name="line.85"></a>
-<span class="sourceLineNo">086</span> private final Compression.Algorithm compressAlgo;<a name="line.86"></a>
-<span class="sourceLineNo">087</span><a name="line.87"></a>
-<span class="sourceLineNo">088</span> private boolean isPrimaryReplicaReader;<a name="line.88"></a>
-<span class="sourceLineNo">089</span><a name="line.89"></a>
-<span class="sourceLineNo">090</span> /**<a name="line.90"></a>
-<span class="sourceLineNo">091</span> * What kind of data block encoding should be used while reading, writing,<a name="line.91"></a>
-<span class="sourceLineNo">092</span> * and handling cache.<a name="line.92"></a>
-<span class="sourceLineNo">093</span> */<a name="line.93"></a>
-<span class="sourceLineNo">094</span> private HFileDataBlockEncoder dataBlockEncoder = NoOpDataBlockEncoder.INSTANCE;<a name="line.94"></a>
-<span class="sourceLineNo">095</span><a name="line.95"></a>
-<span class="sourceLineNo">096</span> /** Last key in the file. Filled in when we read in the file info */<a name="line.96"></a>
-<span class="sourceLineNo">097</span> private Cell lastKeyCell = null;<a name="line.97"></a>
-<span class="sourceLineNo">098</span><a name="line.98"></a>
-<span class="sourceLineNo">099</span> /** Average key length read from file info */<a name="line.99"></a>
-<span class="sourceLineNo">100</span> private int avgKeyLen = -1;<a name="line.100"></a>
-<span class="sourceLineNo">101</span><a name="line.101"></a>
-<span class="sourceLineNo">102</span> /** Average value length read from file info */<a name="line.102"></a>
-<span class="sourceLineNo">103</span> private int avgValueLen = -1;<a name="line.103"></a>
-<span class="sourceLineNo">104</span><a name="line.104"></a>
-<span class="sourceLineNo">105</span> /** Key comparator */<a name="line.105"></a>
-<span class="sourceLineNo">106</span> private CellComparator comparator = CellComparator.COMPARATOR;<a name="line.106"></a>
-<span class="sourceLineNo">107</span><a name="line.107"></a>
-<span class="sourceLineNo">108</span> /** Size of this file. */<a name="line.108"></a>
-<span class="sourceLineNo">109</span> private final long fileSize;<a name="line.109"></a>
-<span class="sourceLineNo">110</span><a name="line.110"></a>
-<span class="sourceLineNo">111</span> /** Block cache configuration. */<a name="line.111"></a>
-<span class="sourceLineNo">112</span> private final CacheConfig cacheConf;<a name="line.112"></a>
-<span class="sourceLineNo">113</span><a name="line.113"></a>
-<span class="sourceLineNo">114</span> /** Path of file */<a name="line.114"></a>
-<span class="sourceLineNo">115</span> private final Path path;<a name="line.115"></a>
-<span class="sourceLineNo">116</span><a name="line.116"></a>
-<span class="sourceLineNo">117</span> /** File name to be used for block names */<a name="line.117"></a>
-<span class="sourceLineNo">118</span> private final String name;<a name="line.118"></a>
-<span class="sourceLineNo">119</span><a name="line.119"></a>
-<span class="sourceLineNo">120</span> private FileInfo fileInfo;<a name="line.120"></a>
-<span class="sourceLineNo">121</span><a name="line.121"></a>
-<span class="sourceLineNo">122</span> private Configuration conf;<a name="line.122"></a>
-<span class="sourceLineNo">123</span><a name="line.123"></a>
-<span class="sourceLineNo">124</span> private HFileContext hfileContext;<a name="line.124"></a>
-<span class="sourceLineNo">125</span><a name="line.125"></a>
-<span class="sourceLineNo">126</span> /** Filesystem-level block reader. */<a name="line.126"></a>
-<span class="sourceLineNo">127</span> private HFileBlock.FSReader fsBlockReader;<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 "sparse lock" implementation allowing to lock on a particular block<a name="line.130"></a>
-<span class="sourceLineNo">131</span> * identified by offset. The purpose of this is to avoid two clients loading<a name="line.131"></a>
-<span class="sourceLineNo">132</span> * the same block, and have all but one client wait to get the block from the<a name="line.132"></a>
-<span class="sourceLineNo">133</span> * cache.<a name="line.133"></a>
-<span class="sourceLineNo">134</span> */<a name="line.134"></a>
-<span class="sourceLineNo">135</span> private IdLock offsetLock = new IdLock();<a name="line.135"></a>
-<span class="sourceLineNo">136</span><a name="line.136"></a>
-<span class="sourceLineNo">137</span> /**<a name="line.137"></a>
-<span class="sourceLineNo">138</span> * Blocks read from the load-on-open section, excluding data root index, meta<a name="line.138"></a>
-<span class="sourceLineNo">139</span> * index, and file info.<a name="line.139"></a>
-<span class="sourceLineNo">140</span> */<a name="line.140"></a>
-<span class="sourceLineNo">141</span> private List<HFileBlock> loadOnOpenBlocks = new ArrayList<HFileBlock>();<a name="line.141"></a>
-<span class="sourceLineNo">142</span><a name="line.142"></a>
-<span class="sourceLineNo">143</span> /** Minimum minor version supported by this HFile format */<a name="line.143"></a>
-<span class="sourceLineNo">144</span> static final int MIN_MINOR_VERSION = 0;<a name="line.144"></a>
-<span class="sourceLineNo">145</span><a name="line.145"></a>
-<span class="sourceLineNo">146</span> /** Maximum minor version supported by this HFile format */<a name="line.146"></a>
-<span class="sourceLineNo">147</span> // We went to version 2 when we moved to pb'ing fileinfo and the trailer on<a name="line.147"></a>
-<span class="sourceLineNo">148</span> // the file. This version can read Writables version 1.<a name="line.148"></a>
-<span class="sourceLineNo">149</span> static final int MAX_MINOR_VERSION = 3;<a name="line.149"></a>
-<span class="sourceLineNo">150</span><a name="line.150"></a>
-<span class="sourceLineNo">151</span> /**<a name="line.151"></a>
-<span class="sourceLineNo">152</span> * We can read files whose major version is v2 IFF their minor version is at least 3.<a name="line.152"></a>
-<span class="sourceLineNo">153</span> */<a name="line.153"></a>
-<span class="sourceLineNo">154</span> private static final int MIN_V2_MINOR_VERSION_WITH_PB = 3;<a name="line.154"></a>
-<span class="sourceLineNo">155</span><a name="line.155"></a>
-<span class="sourceLineNo">156</span> /** Minor versions starting with this number have faked index key */<a name="line.156"></a>
-<span class="sourceLineNo">157</span> static final int MINOR_VERSION_WITH_FAKED_KEY = 3;<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> * Opens a HFile. You must load the index before you can use it by calling<a name="line.160"></a>
-<span class="sourceLineNo">161</span> * {@link #loadFileInfo()}.<a name="line.161"></a>
-<span class="sourceLineNo">162</span> * @param path<a name="line.162"></a>
-<span class="sourceLineNo">163</span> * Path to HFile.<a name="line.163"></a>
-<span class="sourceLineNo">164</span> * @param trailer<a name="line.164"></a>
-<span class="sourceLineNo">165</span> * File trailer.<a name="line.165"></a>
-<span class="sourceLineNo">166</span> * @param fsdis<a name="line.166"></a>
-<span class="sourceLineNo">167</span> * input stream.<a name="line.167"></a>
-<span class="sourceLineNo">168</span> * @param fileSize<a name="line.168"></a>
-<span class="sourceLineNo">169</span> * Length of the stream.<a name="line.169"></a>
-<span class="sourceLineNo">170</span> * @param cacheConf<a name="line.170"></a>
-<span class="sourceLineNo">171</span> * Cache configuration.<a name="line.171"></a>
-<span class="sourceLineNo">172</span> * @param hfs<a name="line.172"></a>
-<span class="sourceLineNo">173</span> * The file system.<a name="line.173"></a>
-<span class="sourceLineNo">174</span> * @param conf<a name="line.174"></a>
-<span class="sourceLineNo">175</span> * Configuration<a name="line.175"></a>
-<span class="sourceLineNo">176</span> */<a name="line.176"></a>
-<span class="sourceLineNo">177</span> @edu.umd.cs.findbugs.annotations.SuppressWarnings(value="URF_UNREAD_PUBLIC_OR_PROTECTED_FIELD")<a name="line.177"></a>
-<span class="sourceLineNo">178</span> public HFileReaderImpl(final Path path, FixedFileTrailer trailer,<a name="line.178"></a>
-<span class="sourceLineNo">179</span> final FSDataInputStreamWrapper fsdis,<a name="line.179"></a>
-<span class="sourceLineNo">180</span> final long fileSize, final CacheConfig cacheConf, final HFileSystem hfs,<a name="line.180"></a>
-<span class="sourceLineNo">181</span> final Configuration conf)<a name="line.181"></a>
-<span class="sourceLineNo">182</span> throws IOException {<a name="line.182"></a>
-<span class="sourceLineNo">183</span> this.trailer = trailer;<a name="line.183"></a>
-<span class="sourceLineNo">184</span> this.compressAlgo = trailer.getCompressionCodec();<a name="line.184"></a>
-<span class="sourceLineNo">185</span> this.cacheConf = cacheConf;<a name="line.185"></a>
-<span class="sourceLineNo">186</span> this.fileSize = fileSize;<a name="line.186"></a>
-<span class="sourceLineNo">187</span> this.path = path;<a name="line.187"></a>
-<span class="sourceLineNo">188</span> this.name = path.getName();<a name="line.188"></a>
-<span class="sourceLineNo">189</span> this.conf = conf;<a name="line.189"></a>
-<span class="sourceLineNo">190</span> checkFileVersion();<a name="line.190"></a>
-<span class="sourceLineNo">191</span> this.hfileContext = createHFileContext(fsdis, fileSize, hfs, path, trailer);<a name="line.191"></a>
-<span class="sourceLineNo">192</span> this.fsBlockReader = new HFileBlock.FSReaderImpl(fsdis, fileSize, hfs, path, hfileContext);<a name="line.192"></a>
-<span class="sourceLineNo">193</span><a name="line.193"></a>
-<span class="sourceLineNo">194</span> // Comparator class name is stored in the trailer in version 2.<a name="line.194"></a>
-<span class="sourceLineNo">195</span> comparator = trailer.createComparator();<a name="line.195"></a>
-<span class="sourceLineNo">196</span> dataBlockIndexReader = new HFileBlockIndex.CellBasedKeyBlockIndexReader(comparator,<a name="line.196"></a>
-<span class="sourceLineNo">197</span> trailer.getNumDataIndexLevels(), this);<a name="line.197"></a>
-<span class="sourceLineNo">198</span> metaBlockIndexReader = new HFileBlockIndex.ByteArrayKeyBlockIndexReader(1);<a name="line.198"></a>
-<span class="sourceLineNo">199</span><a name="line.199"></a>
-<span class="sourceLineNo">200</span> // Parse load-on-open data.<a name="line.200"></a>
-<span class="sourceLineNo">201</span><a name="line.201"></a>
-<span class="sourceLineNo">202</span> HFileBlock.BlockIterator blockIter = fsBlockReader.blockRange(<a name="line.202"></a>
-<span class="sourceLineNo">203</span> trailer.getLoadOnOpenDataOffset(),<a name="line.203"></a>
-<span class="sourceLineNo">204</span> fileSize - trailer.getTrailerSize());<a name="line.204"></a>
-<span class="sourceLineNo">205</span><a name="line.205"></a>
-<span class="sourceLineNo">206</span> // Data index. We also read statistics about the block index written after<a name="line.206"></a>
-<span class="sourceLineNo">207</span> // the root level.<a name="line.207"></a>
-<span class="sourceLineNo">208</span> dataBlockIndexReader.readMultiLevelIndexRoot(<a name="line.208"></a>
-<span class="sourceLineNo">209</span> blockIter.nextBlockWithBlockType(BlockType.ROOT_INDEX),<a name="line.209"></a>
-<span class="sourceLineNo">210</span> trailer.getDataIndexCount());<a name="line.210"></a>
-<span class="sourceLineNo">211</span><a name="line.211"></a>
-<span class="sourceLineNo">212</span> // Meta index.<a name="line.212"></a>
-<span class="sourceLineNo">213</span> metaBlockIndexReader.readRootIndex(<a name="line.213"></a>
-<span class="sourceLineNo">214</span> blockIter.nextBlockWithBlockType(BlockType.ROOT_INDEX),<a name="line.214"></a>
-<span class="sourceLineNo">215</span> trailer.getMetaIndexCount());<a name="line.215"></a>
-<span class="sourceLineNo">216</span><a name="line.216"></a>
-<span class="sourceLineNo">217</span> // File info<a name="line.217"></a>
-<span class="sourceLineNo">218</span> fileInfo = new FileInfo();<a name="line.218"></a>
-<span class="sourceLineNo">219</span> fileInfo.read(blockIter.nextBlockWithBlockType(BlockType.FILE_INFO).getByteStream());<a name="line.219"></a>
-<span class="sourceLineNo">220</span> byte[] creationTimeBytes = fileInfo.get(FileInfo.CREATE_TIME_TS);<a name="line.220"></a>
-<span class="sourceLineNo">221</span> this.hfileContext.setFileCreateTime(creationTimeBytes == null? 0:<a name="line.221"></a>
-<span class="sourceLineNo">222</span> Bytes.toLong(creationTimeBytes));<a name="line.222"></a>
-<span class="sourceLineNo">223</span> if (fileInfo.get(FileInfo.LASTKEY) != null) {<a name="line.223"></a>
-<span class="sourceLineNo">224</span> lastKeyCell = new KeyValue.KeyOnlyKeyValue(fileInfo.get(FileInfo.LASTKEY));<a name="line.224"></a>
-<span class="sourceLineNo">225</span> }<a name="line.225"></a>
-<span class="sourceLineNo">226</span> avgKeyLen = Bytes.toInt(fileInfo.get(FileInfo.AVG_KEY_LEN));<a name="line.226"></a>
-<span class="sourceLineNo">227</span> avgValueLen = Bytes.toInt(fileInfo.get(FileInfo.AVG_VALUE_LEN));<a name="line.227"></a>
-<span class="sourceLineNo">228</span> byte [] keyValueFormatVersion = fileInfo.get(HFileWriterImpl.KEY_VALUE_VERSION);<a name="line.228"></a>
-<span class="sourceLineNo">229</span> includesMemstoreTS = keyValueFormatVersion != null &&<a name="line.229"></a>
-<span class="sourceLineNo">230</span> Bytes.toInt(keyValueFormatVersion) == HFileWriterImpl.KEY_VALUE_VER_WITH_MEMSTORE;<a name="line.230"></a>
-<span class="sourceLineNo">231</span> fsBlockReader.setIncludesMemstoreTS(includesMemstoreTS);<a name="line.231"></a>
-<span class="sourceLineNo">232</span> if (includesMemstoreTS) {<a name="line.232"></a>
-<span class="sourceLineNo">233</span> decodeMemstoreTS = Bytes.toLong(fileInfo.get(HFileWriterImpl.MAX_MEMSTORE_TS_KEY)) > 0;<a name="line.233"></a>
-<span class="sourceLineNo">234</span> }<a name="line.234"></a>
-<span class="sourceLineNo">235</span><a name="line.235"></a>
-<span class="sourceLineNo">236</span> // Read data block encoding algorithm name from file info.<a name="line.236"></a>
-<span class="sourceLineNo">237</span> dataBlockEncoder = HFileDataBlockEncoderImpl.createFromFileInfo(fileInfo);<a name="line.237"></a>
-<span class="sourceLineNo">238</span> fsBlockReader.setDataBlockEncoder(dataBlockEncoder);<a name="line.238"></a>
-<span class="sourceLineNo">239</span><a name="line.239"></a>
-<span class="sourceLineNo">240</span> // Store all other load-on-open blocks for further consumption.<a name="line.240"></a>
-<span class="sourceLineNo">241</span> HFileBlock b;<a name="line.241"></a>
-<span class="sourceLineNo">242</span> while ((b = blockIter.nextBlock()) != null) {<a name="line.242"></a>
-<span class="sourceLineNo">243</span> loadOnOpenBlocks.add(b);<a name="line.243"></a>
-<span class="sourceLineNo">244</span> }<a name="line.244"></a>
-<span class="sourceLineNo">245</span><a name="line.245"></a>
-<span class="sourceLineNo">246</span> // Prefetch file blocks upon open if requested<a name="line.246"></a>
-<span class="sourceLineNo">247</span> if (cacheConf.shouldPrefetchOnOpen()) {<a name="line.247"></a>
-<span class="sourceLineNo">248</span> PrefetchExecutor.request(path, new Runnable() {<a name="line.248"></a>
-<span class="sourceLineNo">249</span> public void run() {<a name="line.249"></a>
-<span class="sourceLineNo">250</span> try {<a name="line.250"></a>
-<span class="sourceLineNo">251</span> long offset = 0;<a name="line.251"></a>
-<span class="sourceLineNo">252</span> long end = fileSize - getTrailer().getTrailerSize();<a name="line.252"></a>
-<span class="sourceLineNo">253</span> HFileBlock prevBlock = null;<a name="line.253"></a>
-<span class="sourceLineNo">254</span> while (offset < end) {<a name="line.254"></a>
-<span class="sourceLineNo">255</span> if (Thread.interrupted()) {<a name="line.255"></a>
-<span class="sourceLineNo">256</span> break;<a name="line.256"></a>
-<span class="sourceLineNo">257</span> }<a name="line.257"></a>
-<span class="sourceLineNo">258</span> long onDiskSize = -1;<a name="line.258"></a>
-<span class="sourceLineNo">259</span> if (prevBlock != null) {<a name="line.259"></a>
-<span class="sourceLineNo">260</span> onDiskSize = prevBlock.getNextBlockOnDiskSizeWithHeader();<a name="line.260"></a>
-<span class="sourceLineNo">261</span> }<a name="line.261"></a>
-<span class="sourceLineNo">262</span> HFileBlock block = readBlock(offset, onDiskSize, true, false, false, false,<a name="line.262"></a>
-<span class="sourceLineNo">263</span> null, null);<a name="line.263"></a>
-<span class="sourceLineNo">264</span> // Need not update the current block. Ideally here the readBlock won't find the<a name="line.264"></a>
-<span class="sourceLineNo">265</span> // block in cache. We call this readBlock so that block data is read from FS and<a name="line.265"></a>
-<span class="sourceLineNo">266</span> // cached in BC. So there is no reference count increment that happens here.<a name="line.266"></a>
-<span class="sourceLineNo">267</span> // The return will ideally be a noop because the block is not of MemoryType SHARED.<a name="line.267"></a>
-<span class="sourceLineNo">268</span> returnBlock(block);<a name="line.268"></a>
-<span class="sourceLineNo">269</span> prevBlock = block;<a name="line.269"></a>
-<span class="sourceLineNo">270</span> offset += block.getOnDiskSizeWithHeader();<a name="line.270"></a>
-<span class="sourceLineNo">271</span> }<a name="line.271"></a>
-<span class="sourceLineNo">272</span> } catch (IOException e) {<a name="line.272"></a>
-<span class="sourceLineNo">273</span> // IOExceptions are probably due to region closes (relocation, etc.)<a name="line.273"></a>
-<span class="sourceLineNo">274</span> if (LOG.isTraceEnabled()) {<a name="line.274"></a>
-<span class="sourceLineNo">275</span> LOG.trace("Exception encountered while prefetching " + path + ":", e);<a name="line.275"></a>
-<span class="sourceLineNo">276</span> }<a name="line.276"></a>
-<span class="sourceLineNo">277</span> } catch (Exception e) {<a name="line.277"></a>
-<span class="sourceLineNo">278</span> // Other exceptions are interesting<a name="line.278"></a>
-<span class="sourceLineNo">279</span> LOG.warn("Exception encountered while prefetching " + path + ":", e);<a name="line.279"></a>
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