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 2017/04/05 01:50:19 UTC
[05/24] hbase-site git commit: Published site at
910b68082c8f200f0ba6395a76b7ee1c8917e401.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/f5caf0f9/devapidocs/src-html/org/apache/hadoop/hbase/wal/AbstractFSWALProvider.Reader.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/wal/AbstractFSWALProvider.Reader.html b/devapidocs/src-html/org/apache/hadoop/hbase/wal/AbstractFSWALProvider.Reader.html
index e1a18ec..fcefc60 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/wal/AbstractFSWALProvider.Reader.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/wal/AbstractFSWALProvider.Reader.html
@@ -25,374 +25,475 @@
<span class="sourceLineNo">017</span> */<a name="line.17"></a>
<span class="sourceLineNo">018</span>package org.apache.hadoop.hbase.wal;<a name="line.18"></a>
<span class="sourceLineNo">019</span><a name="line.19"></a>
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-<span class="sourceLineNo">022</span>import java.util.Collections;<a name="line.22"></a>
-<span class="sourceLineNo">023</span>import java.util.List;<a name="line.23"></a>
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-<span class="sourceLineNo">027</span>import org.apache.commons.logging.Log;<a name="line.27"></a>
-<span class="sourceLineNo">028</span>import org.apache.commons.logging.LogFactory;<a name="line.28"></a>
-<span class="sourceLineNo">029</span>import org.apache.hadoop.conf.Configuration;<a name="line.29"></a>
-<span class="sourceLineNo">030</span>import org.apache.hadoop.fs.FSDataInputStream;<a name="line.30"></a>
-<span class="sourceLineNo">031</span>import org.apache.hadoop.fs.FileSystem;<a name="line.31"></a>
-<span class="sourceLineNo">032</span>import org.apache.hadoop.fs.Path;<a name="line.32"></a>
-<span class="sourceLineNo">033</span>import org.apache.hadoop.hbase.HConstants;<a name="line.33"></a>
-<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.ServerName;<a name="line.34"></a>
-<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.35"></a>
-<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.classification.InterfaceStability;<a name="line.36"></a>
-<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.regionserver.wal.WALActionsListener;<a name="line.38"></a>
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-<span class="sourceLineNo">040</span>import com.google.common.annotations.VisibleForTesting;<a name="line.40"></a>
-<span class="sourceLineNo">041</span><a name="line.41"></a>
-<span class="sourceLineNo">042</span>/**<a name="line.42"></a>
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-<span class="sourceLineNo">046</span> * <li>the HBase root directory<a name="line.46"></a>
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-<span class="sourceLineNo">050</span> * It also uses the providerId to differentiate among files.<a name="line.50"></a>
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-<span class="sourceLineNo">053</span>@InterfaceStability.Evolving<a name="line.53"></a>
-<span class="sourceLineNo">054</span>public abstract class AbstractFSWALProvider<T extends AbstractFSWAL<?>> implements WALProvider {<a name="line.54"></a>
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-<span class="sourceLineNo">056</span> private static final Log LOG = LogFactory.getLog(AbstractFSWALProvider.class);<a name="line.56"></a>
-<span class="sourceLineNo">057</span><a name="line.57"></a>
-<span class="sourceLineNo">058</span> // Only public so classes back in regionserver.wal can access<a name="line.58"></a>
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-<span class="sourceLineNo">075</span> // for default wal provider, logPrefix won't change<a name="line.75"></a>
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-<span class="sourceLineNo">077</span><a name="line.77"></a>
-<span class="sourceLineNo">078</span> /**<a name="line.78"></a>
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-<span class="sourceLineNo">099</span> this.providerId = providerId;<a name="line.99"></a>
-<span class="sourceLineNo">100</span> // get log prefix<a name="line.100"></a>
-<span class="sourceLineNo">101</span> StringBuilder sb = new StringBuilder().append(factory.factoryId);<a name="line.101"></a>
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-<span class="sourceLineNo">116</span> return Collections.emptyList();<a name="line.116"></a>
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-<span class="sourceLineNo">120</span> return wals;<a name="line.120"></a>
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-<span class="sourceLineNo">124</span> public T getWAL(byte[] identifier, byte[] namespace) throws IOException {<a name="line.124"></a>
-<span class="sourceLineNo">125</span> T walCopy = wal;<a name="line.125"></a>
-<span class="sourceLineNo">126</span> if (walCopy == null) {<a name="line.126"></a>
-<span class="sourceLineNo">127</span> // only lock when need to create wal, and need to lock since<a name="line.127"></a>
-<span class="sourceLineNo">128</span> // creating hlog on fs is time consuming<a name="line.128"></a>
-<span class="sourceLineNo">129</span> synchronized (walCreateLock) {<a name="line.129"></a>
-<span class="sourceLineNo">130</span> walCopy = wal;<a name="line.130"></a>
-<span class="sourceLineNo">131</span> if (walCopy == null) {<a name="line.131"></a>
-<span class="sourceLineNo">132</span> walCopy = createWAL();<a name="line.132"></a>
-<span class="sourceLineNo">133</span> wal = walCopy;<a name="line.133"></a>
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+<span class="sourceLineNo">027</span><a name="line.27"></a>
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+<span class="sourceLineNo">029</span>import org.apache.commons.logging.LogFactory;<a name="line.29"></a>
+<span class="sourceLineNo">030</span>import org.apache.hadoop.conf.Configuration;<a name="line.30"></a>
+<span class="sourceLineNo">031</span>import org.apache.hadoop.fs.FSDataInputStream;<a name="line.31"></a>
+<span class="sourceLineNo">032</span>import org.apache.hadoop.fs.FileSystem;<a name="line.32"></a>
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+<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.HConstants;<a name="line.34"></a>
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+<span class="sourceLineNo">038</span>import org.apache.hadoop.hbase.regionserver.wal.AbstractFSWAL;<a name="line.38"></a>
+<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.regionserver.wal.WALActionsListener;<a name="line.39"></a>
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+<span class="sourceLineNo">057</span>@InterfaceStability.Evolving<a name="line.57"></a>
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+<span class="sourceLineNo">098</span> throw new IllegalStateException("WALProvider.init should only be called once.");<a name="line.98"></a>
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+<span class="sourceLineNo">103</span> this.providerId = providerId;<a name="line.103"></a>
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+<span class="sourceLineNo">130</span> if (walCopy == null) {<a name="line.130"></a>
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+<span class="sourceLineNo">391</span> final FileSystem fs = FSUtils.getCurrentFileSystem(conf);<a name="line.391"></a>
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+<span class="sourceLineNo">394</span> LOG.info("Log " + path + " was moved to " + archivedLogLocation);<a name="line.394"></a>
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+<span class="sourceLineNo">404</span> * additional exception handling<a name="line.404"></a>
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+<span class="sourceLineNo">413</span><a name="line.413"></a>
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+<span class="sourceLineNo">415</span> long retryInterval = 2000; // 2 sec<a name="line.415"></a>
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+<span class="sourceLineNo">417</span> int attempt = 0;<a name="line.417"></a>
+<span class="sourceLineNo">418</span> Exception ee = null;<a name="line.418"></a>
+<span class="sourceLineNo">419</span> org.apache.hadoop.hbase.wal.WAL.Reader reader = null;<a name="line.419"></a>
+<span class="sourceLineNo">420</span> while (reader == null && attempt++ < maxAttempts) {<a name="line.420"></a>
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+<span class="sourceLineNo">422</span> // Detect if this is a new file, if so get a new reader else<a name="line.422"></a>
+<span class="sourceLineNo">423</span> // reset the current reader so that we see the new data<a name="line.423"></a>
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+<span class="sourceLineNo">435</span> // HBASE-15019 the WAL was not closed due to some hiccup.<a name="line.435"></a>
+<span class="sourceLineNo">436</span> LOG.warn("Try to recover the WAL lease " + path, lnre);<a name="line.436"></a>
+<span class="sourceLineNo">437</span> recoverLease(conf, path);<a name="line.437"></a>
+<span class="sourceLineNo">438</span> reader = null;<a name="line.438"></a>
+<span class="sourceLineNo">439</span> ee = lnre;<a name="line.439"></a>
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+<span class="sourceLineNo">441</span> // Workaround for race condition in HDFS-4380<a name="line.441"></a>
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+<span class="sourceLineNo">443</span> // Just sleep and retry. Will require re-reading compressed WALs for compressionContext.<a name="line.443"></a>
+<span class="sourceLineNo">444</span> LOG.warn("Got NPE opening reader, will retry.");<a name="line.444"></a>
+<span class="sourceLineNo">445</span> reader = null;<a name="line.445"></a>
+<span class="sourceLineNo">446</span> ee = npe;<a name="line.446"></a>
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+<span class="sourceLineNo">449</span> // sleep before next attempt<a name="line.449"></a>
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+<span class="sourceLineNo">451</span> Thread.sleep(retryInterval);<a name="line.451"></a>
+<span class="sourceLineNo">452</span> } catch (InterruptedException e) {<a name="line.452"></a>
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+<span class="sourceLineNo">454</span> }<a name="line.454"></a>
+<span class="sourceLineNo">455</span> }<a name="line.455"></a>
+<span class="sourceLineNo">456</span> throw new IOException("Could not open reader", ee);<a name="line.456"></a>
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+<span class="sourceLineNo">458</span><a name="line.458"></a>
+<span class="sourceLineNo">459</span> // For HBASE-15019<a name="line.459"></a>
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+<span class="sourceLineNo">466</span> public boolean progress() {<a name="line.466"></a>
+<span class="sourceLineNo">467</span> LOG.debug("Still trying to recover WAL lease: " + path);<a name="line.467"></a>
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+<span class="sourceLineNo">469</span> }<a name="line.469"></a>
+<span class="sourceLineNo">470</span> });<a name="line.470"></a>
+<span class="sourceLineNo">471</span> } catch (IOException e) {<a name="line.471"></a>
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+<span class="sourceLineNo">479</span> * log_prefix.filenumber.log_suffix<a name="line.479"></a>
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+<span class="sourceLineNo">483</span> */<a name="line.483"></a>
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+<span class="sourceLineNo">486</span> return name.substring(0, endIndex);<a name="line.486"></a>
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+<span class="sourceLineNo">488</span>}<a name="line.488"></a>