http://git-wip-us.apache.org/repos/asf/hbase-site/blob/2e694a8e/devapidocs/src-html/org/apache/hadoop/hbase/master/MasterWalManager.html
----------------------------------------------------------------------
diff --git 
a/devapidocs/src-html/org/apache/hadoop/hbase/master/MasterWalManager.html 
b/devapidocs/src-html/org/apache/hadoop/hbase/master/MasterWalManager.html
index f0b26f3..43eb062 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/MasterWalManager.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/MasterWalManager.html
@@ -43,328 +43,368 @@
 <span class="sourceLineNo">035</span>import org.apache.hadoop.fs.PathFilter;<a 
name="line.35"></a>
 <span class="sourceLineNo">036</span>import 
org.apache.hadoop.hbase.HConstants;<a name="line.36"></a>
 <span class="sourceLineNo">037</span>import 
org.apache.hadoop.hbase.ServerName;<a name="line.37"></a>
-<span class="sourceLineNo">038</span>import 
org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.38"></a>
-<span class="sourceLineNo">039</span>import 
org.apache.hadoop.hbase.util.FSUtils;<a name="line.39"></a>
-<span class="sourceLineNo">040</span>import 
org.apache.hadoop.hbase.wal.AbstractFSWALProvider;<a name="line.40"></a>
-<span class="sourceLineNo">041</span>import 
org.apache.hadoop.hbase.wal.WALSplitter;<a name="line.41"></a>
-<span class="sourceLineNo">042</span>import 
org.apache.yetus.audience.InterfaceAudience;<a name="line.42"></a>
-<span class="sourceLineNo">043</span>import org.slf4j.Logger;<a 
name="line.43"></a>
-<span class="sourceLineNo">044</span>import org.slf4j.LoggerFactory;<a 
name="line.44"></a>
-<span class="sourceLineNo">045</span>import 
org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a 
name="line.45"></a>
-<span class="sourceLineNo">046</span><a name="line.46"></a>
-<span class="sourceLineNo">047</span>/**<a name="line.47"></a>
-<span class="sourceLineNo">048</span> * This class abstracts a bunch of 
operations the HMaster needs<a name="line.48"></a>
-<span class="sourceLineNo">049</span> * when splitting log files e.g. finding 
log files, dirs etc.<a name="line.49"></a>
-<span class="sourceLineNo">050</span> */<a name="line.50"></a>
-<span class="sourceLineNo">051</span>@InterfaceAudience.Private<a 
name="line.51"></a>
-<span class="sourceLineNo">052</span>public class MasterWalManager {<a 
name="line.52"></a>
-<span class="sourceLineNo">053</span>  private static final Logger LOG = 
LoggerFactory.getLogger(MasterWalManager.class);<a name="line.53"></a>
-<span class="sourceLineNo">054</span><a name="line.54"></a>
-<span class="sourceLineNo">055</span>  final static PathFilter META_FILTER = 
new PathFilter() {<a name="line.55"></a>
-<span class="sourceLineNo">056</span>    @Override<a name="line.56"></a>
-<span class="sourceLineNo">057</span>    public boolean accept(Path p) {<a 
name="line.57"></a>
-<span class="sourceLineNo">058</span>      return 
AbstractFSWALProvider.isMetaFile(p);<a name="line.58"></a>
-<span class="sourceLineNo">059</span>    }<a name="line.59"></a>
-<span class="sourceLineNo">060</span>  };<a name="line.60"></a>
-<span class="sourceLineNo">061</span><a name="line.61"></a>
-<span class="sourceLineNo">062</span>  final static PathFilter NON_META_FILTER 
= new PathFilter() {<a name="line.62"></a>
-<span class="sourceLineNo">063</span>    @Override<a name="line.63"></a>
-<span class="sourceLineNo">064</span>    public boolean accept(Path p) {<a 
name="line.64"></a>
-<span class="sourceLineNo">065</span>      return 
!AbstractFSWALProvider.isMetaFile(p);<a name="line.65"></a>
-<span class="sourceLineNo">066</span>    }<a name="line.66"></a>
-<span class="sourceLineNo">067</span>  };<a name="line.67"></a>
-<span class="sourceLineNo">068</span><a name="line.68"></a>
-<span class="sourceLineNo">069</span>  // metrics for master<a 
name="line.69"></a>
-<span class="sourceLineNo">070</span>  // TODO: Rename it, since those metrics 
are split-manager related<a name="line.70"></a>
-<span class="sourceLineNo">071</span>  private final MetricsMasterFileSystem 
metricsMasterFilesystem = new MetricsMasterFileSystem();<a name="line.71"></a>
-<span class="sourceLineNo">072</span><a name="line.72"></a>
-<span class="sourceLineNo">073</span>  // Keep around for convenience.<a 
name="line.73"></a>
-<span class="sourceLineNo">074</span>  private final MasterServices 
services;<a name="line.74"></a>
-<span class="sourceLineNo">075</span>  private final Configuration conf;<a 
name="line.75"></a>
-<span class="sourceLineNo">076</span>  private final FileSystem fs;<a 
name="line.76"></a>
-<span class="sourceLineNo">077</span><a name="line.77"></a>
-<span class="sourceLineNo">078</span>  // The Path to the old logs dir<a 
name="line.78"></a>
-<span class="sourceLineNo">079</span>  private final Path oldLogDir;<a 
name="line.79"></a>
-<span class="sourceLineNo">080</span>  private final Path rootDir;<a 
name="line.80"></a>
-<span class="sourceLineNo">081</span><a name="line.81"></a>
-<span class="sourceLineNo">082</span>  // create the split log lock<a 
name="line.82"></a>
-<span class="sourceLineNo">083</span>  private final Lock splitLogLock = new 
ReentrantLock();<a name="line.83"></a>
-<span class="sourceLineNo">084</span>  private final SplitLogManager 
splitLogManager;<a name="line.84"></a>
-<span class="sourceLineNo">085</span><a name="line.85"></a>
-<span class="sourceLineNo">086</span>  // Is the fileystem ok?<a 
name="line.86"></a>
-<span class="sourceLineNo">087</span>  private volatile boolean fsOk = true;<a 
name="line.87"></a>
-<span class="sourceLineNo">088</span><a name="line.88"></a>
-<span class="sourceLineNo">089</span>  public MasterWalManager(MasterServices 
services) throws IOException {<a name="line.89"></a>
-<span class="sourceLineNo">090</span>    this(services.getConfiguration(), 
services.getMasterFileSystem().getWALFileSystem(),<a name="line.90"></a>
-<span class="sourceLineNo">091</span>      
services.getMasterFileSystem().getWALRootDir(), services);<a name="line.91"></a>
-<span class="sourceLineNo">092</span>  }<a name="line.92"></a>
-<span class="sourceLineNo">093</span><a name="line.93"></a>
-<span class="sourceLineNo">094</span>  public MasterWalManager(Configuration 
conf, FileSystem fs, Path rootDir, MasterServices services)<a 
name="line.94"></a>
-<span class="sourceLineNo">095</span>      throws IOException {<a 
name="line.95"></a>
-<span class="sourceLineNo">096</span>    this.fs = fs;<a name="line.96"></a>
-<span class="sourceLineNo">097</span>    this.conf = conf;<a 
name="line.97"></a>
-<span class="sourceLineNo">098</span>    this.rootDir = rootDir;<a 
name="line.98"></a>
-<span class="sourceLineNo">099</span>    this.services = services;<a 
name="line.99"></a>
-<span class="sourceLineNo">100</span>    this.splitLogManager = new 
SplitLogManager(services, conf);<a name="line.100"></a>
-<span class="sourceLineNo">101</span><a name="line.101"></a>
-<span class="sourceLineNo">102</span>    this.oldLogDir = new Path(rootDir, 
HConstants.HREGION_OLDLOGDIR_NAME);<a name="line.102"></a>
-<span class="sourceLineNo">103</span>  }<a name="line.103"></a>
-<span class="sourceLineNo">104</span><a name="line.104"></a>
-<span class="sourceLineNo">105</span>  public void stop() {<a 
name="line.105"></a>
-<span class="sourceLineNo">106</span>    if (splitLogManager != null) {<a 
name="line.106"></a>
-<span class="sourceLineNo">107</span>      splitLogManager.stop();<a 
name="line.107"></a>
-<span class="sourceLineNo">108</span>    }<a name="line.108"></a>
-<span class="sourceLineNo">109</span>  }<a name="line.109"></a>
-<span class="sourceLineNo">110</span><a name="line.110"></a>
-<span class="sourceLineNo">111</span>  @VisibleForTesting<a 
name="line.111"></a>
-<span class="sourceLineNo">112</span>  SplitLogManager getSplitLogManager() 
{<a name="line.112"></a>
-<span class="sourceLineNo">113</span>    return this.splitLogManager;<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>   * Get the directory where old logs 
go<a name="line.117"></a>
-<span class="sourceLineNo">118</span>   * @return the dir<a 
name="line.118"></a>
-<span class="sourceLineNo">119</span>   */<a name="line.119"></a>
-<span class="sourceLineNo">120</span>  Path getOldLogDir() {<a 
name="line.120"></a>
-<span class="sourceLineNo">121</span>    return this.oldLogDir;<a 
name="line.121"></a>
-<span class="sourceLineNo">122</span>  }<a name="line.122"></a>
-<span class="sourceLineNo">123</span><a name="line.123"></a>
-<span class="sourceLineNo">124</span>  public FileSystem getFileSystem() {<a 
name="line.124"></a>
-<span class="sourceLineNo">125</span>    return this.fs;<a name="line.125"></a>
-<span class="sourceLineNo">126</span>  }<a name="line.126"></a>
-<span class="sourceLineNo">127</span><a name="line.127"></a>
-<span class="sourceLineNo">128</span>  /**<a name="line.128"></a>
-<span class="sourceLineNo">129</span>   * Checks to see if the file system is 
still accessible.<a name="line.129"></a>
-<span class="sourceLineNo">130</span>   * If not, sets closed<a 
name="line.130"></a>
-<span class="sourceLineNo">131</span>   * @return false if file system is not 
available<a name="line.131"></a>
-<span class="sourceLineNo">132</span>   */<a name="line.132"></a>
-<span class="sourceLineNo">133</span>  private boolean checkFileSystem() {<a 
name="line.133"></a>
-<span class="sourceLineNo">134</span>    if (this.fsOk) {<a 
name="line.134"></a>
-<span class="sourceLineNo">135</span>      try {<a name="line.135"></a>
-<span class="sourceLineNo">136</span>        
FSUtils.checkFileSystemAvailable(this.fs);<a name="line.136"></a>
-<span class="sourceLineNo">137</span>        
FSUtils.checkDfsSafeMode(this.conf);<a name="line.137"></a>
-<span class="sourceLineNo">138</span>      } catch (IOException e) {<a 
name="line.138"></a>
-<span class="sourceLineNo">139</span>        services.abort("Shutting down 
HBase cluster: file system not available", e);<a name="line.139"></a>
-<span class="sourceLineNo">140</span>        this.fsOk = false;<a 
name="line.140"></a>
-<span class="sourceLineNo">141</span>      }<a name="line.141"></a>
-<span class="sourceLineNo">142</span>    }<a name="line.142"></a>
-<span class="sourceLineNo">143</span>    return this.fsOk;<a 
name="line.143"></a>
-<span class="sourceLineNo">144</span>  }<a name="line.144"></a>
-<span class="sourceLineNo">145</span><a name="line.145"></a>
-<span class="sourceLineNo">146</span>  /**<a name="line.146"></a>
-<span class="sourceLineNo">147</span>   * Get Servernames which are currently 
splitting; paths have a '-splitting' suffix.<a name="line.147"></a>
-<span class="sourceLineNo">148</span>   * @return ServerName<a 
name="line.148"></a>
-<span class="sourceLineNo">149</span>   * @throws IOException IOException<a 
name="line.149"></a>
-<span class="sourceLineNo">150</span>   */<a name="line.150"></a>
-<span class="sourceLineNo">151</span>  public Set&lt;ServerName&gt; 
getSplittingServersFromWALDir() throws  IOException {<a name="line.151"></a>
-<span class="sourceLineNo">152</span>    return 
getServerNamesFromWALDirPath(<a name="line.152"></a>
-<span class="sourceLineNo">153</span>      p -&gt; 
p.getName().endsWith(AbstractFSWALProvider.SPLITTING_EXT));<a 
name="line.153"></a>
-<span class="sourceLineNo">154</span>  }<a name="line.154"></a>
-<span class="sourceLineNo">155</span><a name="line.155"></a>
-<span class="sourceLineNo">156</span>  /**<a name="line.156"></a>
-<span class="sourceLineNo">157</span>   * Get Servernames that COULD BE 
'alive'; excludes those that have a '-splitting' suffix as these<a 
name="line.157"></a>
-<span class="sourceLineNo">158</span>   * are already being split -- they 
cannot be 'alive'.<a name="line.158"></a>
-<span class="sourceLineNo">159</span>   * @return ServerName<a 
name="line.159"></a>
-<span class="sourceLineNo">160</span>   * @throws IOException IOException<a 
name="line.160"></a>
-<span class="sourceLineNo">161</span>   */<a name="line.161"></a>
-<span class="sourceLineNo">162</span>  public Set&lt;ServerName&gt; 
getLiveServersFromWALDir() throws IOException {<a name="line.162"></a>
-<span class="sourceLineNo">163</span>    return 
getServerNamesFromWALDirPath(<a name="line.163"></a>
-<span class="sourceLineNo">164</span>      p -&gt; 
!p.getName().endsWith(AbstractFSWALProvider.SPLITTING_EXT));<a 
name="line.164"></a>
-<span class="sourceLineNo">165</span>  }<a name="line.165"></a>
-<span class="sourceLineNo">166</span><a name="line.166"></a>
-<span class="sourceLineNo">167</span>  /**<a name="line.167"></a>
-<span class="sourceLineNo">168</span>   * @return listing of ServerNames found 
by parsing WAL directory paths in FS.<a name="line.168"></a>
-<span class="sourceLineNo">169</span>   *<a name="line.169"></a>
-<span class="sourceLineNo">170</span>   */<a name="line.170"></a>
-<span class="sourceLineNo">171</span>  public Set&lt;ServerName&gt; 
getServerNamesFromWALDirPath(final PathFilter filter) throws IOException {<a 
name="line.171"></a>
-<span class="sourceLineNo">172</span>    FileStatus[] walDirForServerNames = 
getWALDirPaths(filter);<a name="line.172"></a>
-<span class="sourceLineNo">173</span>    return 
Stream.of(walDirForServerNames).map(s -&gt; {<a name="line.173"></a>
-<span class="sourceLineNo">174</span>      ServerName serverName = 
AbstractFSWALProvider.getServerNameFromWALDirectoryName(s.getPath());<a 
name="line.174"></a>
-<span class="sourceLineNo">175</span>      if (serverName == null) {<a 
name="line.175"></a>
-<span class="sourceLineNo">176</span>        LOG.warn("Log folder {} doesn't 
look like its name includes a " +<a name="line.176"></a>
-<span class="sourceLineNo">177</span>          "region server name; leaving in 
place. If you see later errors about missing " +<a name="line.177"></a>
-<span class="sourceLineNo">178</span>          "write ahead logs they may be 
saved in this location.", s.getPath());<a name="line.178"></a>
-<span class="sourceLineNo">179</span>        return null;<a 
name="line.179"></a>
-<span class="sourceLineNo">180</span>      }<a name="line.180"></a>
-<span class="sourceLineNo">181</span>      return serverName;<a 
name="line.181"></a>
-<span class="sourceLineNo">182</span>    }).filter(s -&gt; s != 
null).collect(Collectors.toSet());<a name="line.182"></a>
-<span class="sourceLineNo">183</span>  }<a name="line.183"></a>
-<span class="sourceLineNo">184</span><a name="line.184"></a>
-<span class="sourceLineNo">185</span>  /**<a name="line.185"></a>
-<span class="sourceLineNo">186</span>   * @return List of all RegionServer WAL 
dirs; i.e. this.rootDir/HConstants.HREGION_LOGDIR_NAME.<a name="line.186"></a>
-<span class="sourceLineNo">187</span>   */<a name="line.187"></a>
-<span class="sourceLineNo">188</span>  public FileStatus[] 
getWALDirPaths(final PathFilter filter) throws IOException {<a 
name="line.188"></a>
-<span class="sourceLineNo">189</span>    Path walDirPath = new Path(rootDir, 
HConstants.HREGION_LOGDIR_NAME);<a name="line.189"></a>
-<span class="sourceLineNo">190</span>    FileStatus[] walDirForServerNames = 
FSUtils.listStatus(fs, walDirPath, filter);<a name="line.190"></a>
-<span class="sourceLineNo">191</span>    return walDirForServerNames == null? 
new FileStatus[0]: walDirForServerNames;<a name="line.191"></a>
-<span class="sourceLineNo">192</span>  }<a name="line.192"></a>
-<span class="sourceLineNo">193</span><a name="line.193"></a>
-<span class="sourceLineNo">194</span>  /**<a name="line.194"></a>
-<span class="sourceLineNo">195</span>   * Inspect the log directory to find 
dead servers which need recovery work<a name="line.195"></a>
-<span class="sourceLineNo">196</span>   * @return A set of ServerNames which 
aren't running but still have WAL files left in file system<a 
name="line.196"></a>
-<span class="sourceLineNo">197</span>   * @deprecated With proc-v2, we can 
record the crash server with procedure store, so do not need<a 
name="line.197"></a>
-<span class="sourceLineNo">198</span>   *             to scan the wal 
directory to find out the splitting wal directory any more. Leave<a 
name="line.198"></a>
-<span class="sourceLineNo">199</span>   *             it here only because 
{@code RecoverMetaProcedure}(which is also deprecated) uses<a 
name="line.199"></a>
-<span class="sourceLineNo">200</span>   *             it.<a 
name="line.200"></a>
-<span class="sourceLineNo">201</span>   */<a name="line.201"></a>
-<span class="sourceLineNo">202</span>  @Deprecated<a name="line.202"></a>
-<span class="sourceLineNo">203</span>  public Set&lt;ServerName&gt; 
getFailedServersFromLogFolders() {<a name="line.203"></a>
-<span class="sourceLineNo">204</span>    boolean retrySplitting = 
!conf.getBoolean("hbase.hlog.split.skip.errors",<a name="line.204"></a>
-<span class="sourceLineNo">205</span>        
WALSplitter.SPLIT_SKIP_ERRORS_DEFAULT);<a name="line.205"></a>
-<span class="sourceLineNo">206</span><a name="line.206"></a>
-<span class="sourceLineNo">207</span>    Set&lt;ServerName&gt; serverNames = 
new HashSet&lt;&gt;();<a name="line.207"></a>
-<span class="sourceLineNo">208</span>    Path logsDirPath = new 
Path(this.rootDir, HConstants.HREGION_LOGDIR_NAME);<a name="line.208"></a>
-<span class="sourceLineNo">209</span><a name="line.209"></a>
-<span class="sourceLineNo">210</span>    do {<a name="line.210"></a>
-<span class="sourceLineNo">211</span>      if (services.isStopped()) {<a 
name="line.211"></a>
-<span class="sourceLineNo">212</span>        LOG.warn("Master stopped while 
trying to get failed servers.");<a name="line.212"></a>
-<span class="sourceLineNo">213</span>        break;<a name="line.213"></a>
-<span class="sourceLineNo">214</span>      }<a name="line.214"></a>
-<span class="sourceLineNo">215</span>      try {<a name="line.215"></a>
-<span class="sourceLineNo">216</span>        if (!this.fs.exists(logsDirPath)) 
return serverNames;<a name="line.216"></a>
-<span class="sourceLineNo">217</span>        FileStatus[] logFolders = 
FSUtils.listStatus(this.fs, logsDirPath, null);<a name="line.217"></a>
-<span class="sourceLineNo">218</span>        // Get online servers after 
getting log folders to avoid log folder deletion of newly<a name="line.218"></a>
-<span class="sourceLineNo">219</span>        // checked in region servers . 
see HBASE-5916<a name="line.219"></a>
-<span class="sourceLineNo">220</span>        Set&lt;ServerName&gt; 
onlineServers = services.getServerManager().getOnlineServers().keySet();<a 
name="line.220"></a>
-<span class="sourceLineNo">221</span><a name="line.221"></a>
-<span class="sourceLineNo">222</span>        if (logFolders == null || 
logFolders.length == 0) {<a name="line.222"></a>
-<span class="sourceLineNo">223</span>          LOG.debug("No log files to 
split, proceeding...");<a name="line.223"></a>
-<span class="sourceLineNo">224</span>          return serverNames;<a 
name="line.224"></a>
-<span class="sourceLineNo">225</span>        }<a name="line.225"></a>
-<span class="sourceLineNo">226</span>        for (FileStatus status : 
logFolders) {<a name="line.226"></a>
-<span class="sourceLineNo">227</span>          FileStatus[] curLogFiles = 
FSUtils.listStatus(this.fs, status.getPath(), null);<a name="line.227"></a>
-<span class="sourceLineNo">228</span>          if (curLogFiles == null || 
curLogFiles.length == 0) {<a name="line.228"></a>
-<span class="sourceLineNo">229</span>            // Empty log folder. No 
recovery needed<a name="line.229"></a>
-<span class="sourceLineNo">230</span>            continue;<a 
name="line.230"></a>
-<span class="sourceLineNo">231</span>          }<a name="line.231"></a>
-<span class="sourceLineNo">232</span>          final ServerName serverName = 
AbstractFSWALProvider.getServerNameFromWALDirectoryName(<a name="line.232"></a>
-<span class="sourceLineNo">233</span>              status.getPath());<a 
name="line.233"></a>
-<span class="sourceLineNo">234</span>          if (null == serverName) {<a 
name="line.234"></a>
-<span class="sourceLineNo">235</span>            LOG.warn("Log folder " + 
status.getPath() + " doesn't look like its name includes a " +<a 
name="line.235"></a>
-<span class="sourceLineNo">236</span>                "region server name; 
leaving in place. If you see later errors about missing " +<a 
name="line.236"></a>
-<span class="sourceLineNo">237</span>                "write ahead logs they 
may be saved in this location.");<a name="line.237"></a>
-<span class="sourceLineNo">238</span>          } else if 
(!onlineServers.contains(serverName)) {<a name="line.238"></a>
-<span class="sourceLineNo">239</span>            LOG.info("Log folder " + 
status.getPath() + " doesn't belong "<a name="line.239"></a>
-<span class="sourceLineNo">240</span>                + "to a known region 
server, splitting");<a name="line.240"></a>
-<span class="sourceLineNo">241</span>            
serverNames.add(serverName);<a name="line.241"></a>
-<span class="sourceLineNo">242</span>          } else {<a name="line.242"></a>
-<span class="sourceLineNo">243</span>            LOG.info("Log folder " + 
status.getPath() + " belongs to an existing region server");<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>        retrySplitting = false;<a 
name="line.246"></a>
-<span class="sourceLineNo">247</span>      } catch (IOException ioe) {<a 
name="line.247"></a>
-<span class="sourceLineNo">248</span>        LOG.warn("Failed getting failed 
servers to be recovered.", ioe);<a name="line.248"></a>
-<span class="sourceLineNo">249</span>        if (!checkFileSystem()) {<a 
name="line.249"></a>
-<span class="sourceLineNo">250</span>          LOG.warn("Bad Filesystem, 
exiting");<a name="line.250"></a>
-<span class="sourceLineNo">251</span>          Runtime.getRuntime().halt(1);<a 
name="line.251"></a>
-<span class="sourceLineNo">252</span>        }<a name="line.252"></a>
-<span class="sourceLineNo">253</span>        try {<a name="line.253"></a>
-<span class="sourceLineNo">254</span>          if (retrySplitting) {<a 
name="line.254"></a>
-<span class="sourceLineNo">255</span>            
Thread.sleep(conf.getInt("hbase.hlog.split.failure.retry.interval", 30 * 
1000));<a name="line.255"></a>
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Thread.currentThread().interrupt();<a name="line.259"></a>
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splitLog(Collections.&lt;ServerName&gt;singleton(serverName));<a 
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splitting for meta WAL<a name="line.274"></a>
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splitMetaLog(Collections.&lt;ServerName&gt;singleton(serverName));<a 
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splitting for meta WAL<a name="line.282"></a>
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Set&lt;ServerName&gt; serverNames) throws IOException {<a name="line.285"></a>
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@edu.umd.cs.findbugs.annotations.SuppressWarnings(value="UL_UNRELEASED_LOCK", 
justification=<a name="line.289"></a>
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set it. Updates to code that uses it should verify use " +<a 
name="line.290"></a>
-<span class="sourceLineNo">291</span>      "of the guard boolean.")<a 
name="line.291"></a>
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getLogDirs(final Set&lt;ServerName&gt; serverNames) throws IOException {<a 
name="line.292"></a>
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ArrayList&lt;&gt;();<a name="line.293"></a>
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{<a name="line.295"></a>
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could have multiple places splitting a same wal<a name="line.296"></a>
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we move to proc-v2?<a name="line.297"></a>
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serverNames) {<a name="line.302"></a>
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Path(this.rootDir,<a name="line.303"></a>
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AbstractFSWALProvider.getWALDirectoryName(serverName.toString()));<a 
name="line.304"></a>
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logDir.suffix(AbstractFSWALProvider.SPLITTING_EXT);<a name="line.305"></a>
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rogue RS doesn't create more WALs<a name="line.306"></a>
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name="line.307"></a>
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splitDir)) {<a name="line.308"></a>
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Set&lt;ServerName&gt; serverNames) throws IOException {<a name="line.332"></a>
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NON_META_FILTER);<a name="line.333"></a>
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-<span class="sourceLineNo">335</span><a name="line.335"></a>
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that splits WAL files matching a filter. Callers should<a name="line.337"></a>
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and non-meta WALs.<a name="line.338"></a>
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these servers will be split; this will rename the log<a name="line.339"></a>
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from under a soft-failed server<a name="line.340"></a>
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Set&lt;ServerName&gt; serverNames, PathFilter filter) throws IOException {<a 
name="line.342"></a>
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0;<a name="line.343"></a>
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getLogDirs(serverNames);<a name="line.344"></a>
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splitLogManager.handleDeadWorkers(serverNames);<a name="line.346"></a>
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splitLogManager.splitLogDistributed(serverNames, logDirs, filter);<a 
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name="line.352"></a>
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this.metricsMasterFilesystem.addMetaWALSplit(splitTime, splitLogSize);<a 
name="line.353"></a>
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this.metricsMasterFilesystem.addSplit(splitTime, splitLogSize);<a 
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-<span class="sourceLineNo">358</span>  }<a name="line.358"></a>
-<span class="sourceLineNo">359</span>}<a name="line.359"></a>
+<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.util.EnvironmentEdgeManager;<a name="line.39"></a>
+<span class="sourceLineNo">040</span>import 
org.apache.hadoop.hbase.util.FSUtils;<a name="line.40"></a>
+<span class="sourceLineNo">041</span>import 
org.apache.hadoop.hbase.wal.AbstractFSWALProvider;<a name="line.41"></a>
+<span class="sourceLineNo">042</span>import 
org.apache.hadoop.hbase.wal.WALSplitter;<a name="line.42"></a>
+<span class="sourceLineNo">043</span>import 
org.apache.yetus.audience.InterfaceAudience;<a name="line.43"></a>
+<span class="sourceLineNo">044</span>import org.slf4j.Logger;<a 
name="line.44"></a>
+<span class="sourceLineNo">045</span>import org.slf4j.LoggerFactory;<a 
name="line.45"></a>
+<span class="sourceLineNo">046</span>import 
org.apache.hbase.thirdparty.com.google.common.annotations.VisibleForTesting;<a 
name="line.46"></a>
+<span class="sourceLineNo">047</span><a name="line.47"></a>
+<span class="sourceLineNo">048</span>/**<a name="line.48"></a>
+<span class="sourceLineNo">049</span> * This class abstracts a bunch of 
operations the HMaster needs<a name="line.49"></a>
+<span class="sourceLineNo">050</span> * when splitting log files e.g. finding 
log files, dirs etc.<a name="line.50"></a>
+<span class="sourceLineNo">051</span> */<a name="line.51"></a>
+<span class="sourceLineNo">052</span>@InterfaceAudience.Private<a 
name="line.52"></a>
+<span class="sourceLineNo">053</span>public class MasterWalManager {<a 
name="line.53"></a>
+<span class="sourceLineNo">054</span>  private static final Logger LOG = 
LoggerFactory.getLogger(MasterWalManager.class);<a name="line.54"></a>
+<span class="sourceLineNo">055</span><a name="line.55"></a>
+<span class="sourceLineNo">056</span>  final static PathFilter META_FILTER = 
new PathFilter() {<a name="line.56"></a>
+<span class="sourceLineNo">057</span>    @Override<a name="line.57"></a>
+<span class="sourceLineNo">058</span>    public boolean accept(Path p) {<a 
name="line.58"></a>
+<span class="sourceLineNo">059</span>      return 
AbstractFSWALProvider.isMetaFile(p);<a name="line.59"></a>
+<span class="sourceLineNo">060</span>    }<a name="line.60"></a>
+<span class="sourceLineNo">061</span>  };<a name="line.61"></a>
+<span class="sourceLineNo">062</span><a name="line.62"></a>
+<span class="sourceLineNo">063</span>  final static PathFilter NON_META_FILTER 
= new PathFilter() {<a name="line.63"></a>
+<span class="sourceLineNo">064</span>    @Override<a name="line.64"></a>
+<span class="sourceLineNo">065</span>    public boolean accept(Path p) {<a 
name="line.65"></a>
+<span class="sourceLineNo">066</span>      return 
!AbstractFSWALProvider.isMetaFile(p);<a name="line.66"></a>
+<span class="sourceLineNo">067</span>    }<a name="line.67"></a>
+<span class="sourceLineNo">068</span>  };<a name="line.68"></a>
+<span class="sourceLineNo">069</span><a name="line.69"></a>
+<span class="sourceLineNo">070</span>  // metrics for master<a 
name="line.70"></a>
+<span class="sourceLineNo">071</span>  // TODO: Rename it, since those metrics 
are split-manager related<a name="line.71"></a>
+<span class="sourceLineNo">072</span>  private final MetricsMasterFileSystem 
metricsMasterFilesystem = new MetricsMasterFileSystem();<a name="line.72"></a>
+<span class="sourceLineNo">073</span><a name="line.73"></a>
+<span class="sourceLineNo">074</span>  // Keep around for convenience.<a 
name="line.74"></a>
+<span class="sourceLineNo">075</span>  private final MasterServices 
services;<a name="line.75"></a>
+<span class="sourceLineNo">076</span>  private final Configuration conf;<a 
name="line.76"></a>
+<span class="sourceLineNo">077</span>  private final FileSystem fs;<a 
name="line.77"></a>
+<span class="sourceLineNo">078</span><a name="line.78"></a>
+<span class="sourceLineNo">079</span>  // The Path to the old logs dir<a 
name="line.79"></a>
+<span class="sourceLineNo">080</span>  private final Path oldLogDir;<a 
name="line.80"></a>
+<span class="sourceLineNo">081</span>  private final Path rootDir;<a 
name="line.81"></a>
+<span class="sourceLineNo">082</span><a name="line.82"></a>
+<span class="sourceLineNo">083</span>  // create the split log lock<a 
name="line.83"></a>
+<span class="sourceLineNo">084</span>  private final Lock splitLogLock = new 
ReentrantLock();<a name="line.84"></a>
+<span class="sourceLineNo">085</span>  private final SplitLogManager 
splitLogManager;<a name="line.85"></a>
+<span class="sourceLineNo">086</span><a name="line.86"></a>
+<span class="sourceLineNo">087</span>  // Is the fileystem ok?<a 
name="line.87"></a>
+<span class="sourceLineNo">088</span>  private volatile boolean fsOk = true;<a 
name="line.88"></a>
+<span class="sourceLineNo">089</span><a name="line.89"></a>
+<span class="sourceLineNo">090</span>  public MasterWalManager(MasterServices 
services) throws IOException {<a name="line.90"></a>
+<span class="sourceLineNo">091</span>    this(services.getConfiguration(), 
services.getMasterFileSystem().getWALFileSystem(),<a name="line.91"></a>
+<span class="sourceLineNo">092</span>      
services.getMasterFileSystem().getWALRootDir(), services);<a name="line.92"></a>
+<span class="sourceLineNo">093</span>  }<a name="line.93"></a>
+<span class="sourceLineNo">094</span><a name="line.94"></a>
+<span class="sourceLineNo">095</span>  public MasterWalManager(Configuration 
conf, FileSystem fs, Path rootDir, MasterServices services)<a 
name="line.95"></a>
+<span class="sourceLineNo">096</span>      throws IOException {<a 
name="line.96"></a>
+<span class="sourceLineNo">097</span>    this.fs = fs;<a name="line.97"></a>
+<span class="sourceLineNo">098</span>    this.conf = conf;<a 
name="line.98"></a>
+<span class="sourceLineNo">099</span>    this.rootDir = rootDir;<a 
name="line.99"></a>
+<span class="sourceLineNo">100</span>    this.services = services;<a 
name="line.100"></a>
+<span class="sourceLineNo">101</span>    this.splitLogManager = new 
SplitLogManager(services, conf);<a name="line.101"></a>
+<span class="sourceLineNo">102</span><a name="line.102"></a>
+<span class="sourceLineNo">103</span>    this.oldLogDir = new Path(rootDir, 
HConstants.HREGION_OLDLOGDIR_NAME);<a name="line.103"></a>
+<span class="sourceLineNo">104</span>  }<a name="line.104"></a>
+<span class="sourceLineNo">105</span><a name="line.105"></a>
+<span class="sourceLineNo">106</span>  public void stop() {<a 
name="line.106"></a>
+<span class="sourceLineNo">107</span>    if (splitLogManager != null) {<a 
name="line.107"></a>
+<span class="sourceLineNo">108</span>      splitLogManager.stop();<a 
name="line.108"></a>
+<span class="sourceLineNo">109</span>    }<a name="line.109"></a>
+<span class="sourceLineNo">110</span>  }<a name="line.110"></a>
+<span class="sourceLineNo">111</span><a name="line.111"></a>
+<span class="sourceLineNo">112</span>  @VisibleForTesting<a 
name="line.112"></a>
+<span class="sourceLineNo">113</span>  SplitLogManager getSplitLogManager() 
{<a name="line.113"></a>
+<span class="sourceLineNo">114</span>    return this.splitLogManager;<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>  /**<a name="line.117"></a>
+<span class="sourceLineNo">118</span>   * Get the directory where old logs 
go<a name="line.118"></a>
+<span class="sourceLineNo">119</span>   * @return the dir<a 
name="line.119"></a>
+<span class="sourceLineNo">120</span>   */<a name="line.120"></a>
+<span class="sourceLineNo">121</span>  Path getOldLogDir() {<a 
name="line.121"></a>
+<span class="sourceLineNo">122</span>    return this.oldLogDir;<a 
name="line.122"></a>
+<span class="sourceLineNo">123</span>  }<a name="line.123"></a>
+<span class="sourceLineNo">124</span><a name="line.124"></a>
+<span class="sourceLineNo">125</span>  public FileSystem getFileSystem() {<a 
name="line.125"></a>
+<span class="sourceLineNo">126</span>    return this.fs;<a name="line.126"></a>
+<span class="sourceLineNo">127</span>  }<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>   * Checks to see if the file system is 
still accessible.<a name="line.130"></a>
+<span class="sourceLineNo">131</span>   * If not, sets closed<a 
name="line.131"></a>
+<span class="sourceLineNo">132</span>   * @return false if file system is not 
available<a name="line.132"></a>
+<span class="sourceLineNo">133</span>   */<a name="line.133"></a>
+<span class="sourceLineNo">134</span>  private boolean checkFileSystem() {<a 
name="line.134"></a>
+<span class="sourceLineNo">135</span>    if (this.fsOk) {<a 
name="line.135"></a>
+<span class="sourceLineNo">136</span>      try {<a name="line.136"></a>
+<span class="sourceLineNo">137</span>        
FSUtils.checkFileSystemAvailable(this.fs);<a name="line.137"></a>
+<span class="sourceLineNo">138</span>        
FSUtils.checkDfsSafeMode(this.conf);<a name="line.138"></a>
+<span class="sourceLineNo">139</span>      } catch (IOException e) {<a 
name="line.139"></a>
+<span class="sourceLineNo">140</span>        services.abort("Shutting down 
HBase cluster: file system not available", e);<a name="line.140"></a>
+<span class="sourceLineNo">141</span>        this.fsOk = false;<a 
name="line.141"></a>
+<span class="sourceLineNo">142</span>      }<a name="line.142"></a>
+<span class="sourceLineNo">143</span>    }<a name="line.143"></a>
+<span class="sourceLineNo">144</span>    return this.fsOk;<a 
name="line.144"></a>
+<span class="sourceLineNo">145</span>  }<a name="line.145"></a>
+<span class="sourceLineNo">146</span><a name="line.146"></a>
+<span class="sourceLineNo">147</span>  /**<a name="line.147"></a>
+<span class="sourceLineNo">148</span>   * Get Servernames which are currently 
splitting; paths have a '-splitting' suffix.<a name="line.148"></a>
+<span class="sourceLineNo">149</span>   * @return ServerName<a 
name="line.149"></a>
+<span class="sourceLineNo">150</span>   * @throws IOException IOException<a 
name="line.150"></a>
+<span class="sourceLineNo">151</span>   */<a name="line.151"></a>
+<span class="sourceLineNo">152</span>  public Set&lt;ServerName&gt; 
getSplittingServersFromWALDir() throws  IOException {<a name="line.152"></a>
+<span class="sourceLineNo">153</span>    return 
getServerNamesFromWALDirPath(<a name="line.153"></a>
+<span class="sourceLineNo">154</span>      p -&gt; 
p.getName().endsWith(AbstractFSWALProvider.SPLITTING_EXT));<a 
name="line.154"></a>
+<span class="sourceLineNo">155</span>  }<a name="line.155"></a>
+<span class="sourceLineNo">156</span><a name="line.156"></a>
+<span class="sourceLineNo">157</span>  /**<a name="line.157"></a>
+<span class="sourceLineNo">158</span>   * Get Servernames that COULD BE 
'alive'; excludes those that have a '-splitting' suffix as these<a 
name="line.158"></a>
+<span class="sourceLineNo">159</span>   * are already being split -- they 
cannot be 'alive'.<a name="line.159"></a>
+<span class="sourceLineNo">160</span>   * @return ServerName<a 
name="line.160"></a>
+<span class="sourceLineNo">161</span>   * @throws IOException IOException<a 
name="line.161"></a>
+<span class="sourceLineNo">162</span>   */<a name="line.162"></a>
+<span class="sourceLineNo">163</span>  public Set&lt;ServerName&gt; 
getLiveServersFromWALDir() throws IOException {<a name="line.163"></a>
+<span class="sourceLineNo">164</span>    return 
getServerNamesFromWALDirPath(<a name="line.164"></a>
+<span class="sourceLineNo">165</span>      p -&gt; 
!p.getName().endsWith(AbstractFSWALProvider.SPLITTING_EXT));<a 
name="line.165"></a>
+<span class="sourceLineNo">166</span>  }<a name="line.166"></a>
+<span class="sourceLineNo">167</span><a name="line.167"></a>
+<span class="sourceLineNo">168</span>  /**<a name="line.168"></a>
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by parsing WAL directory paths in FS.<a name="line.169"></a>
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getServerNamesFromWALDirPath(final PathFilter filter) throws IOException {<a 
name="line.172"></a>
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getWALDirPaths(filter);<a name="line.173"></a>
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Stream.of(walDirForServerNames).map(s -&gt; {<a name="line.174"></a>
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AbstractFSWALProvider.getServerNameFromWALDirectoryName(s.getPath());<a 
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place. If you see later errors about missing " +<a name="line.178"></a>
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saved in this location.", s.getPath());<a name="line.179"></a>
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null).collect(Collectors.toSet());<a name="line.183"></a>
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dirs; i.e. this.rootDir/HConstants.HREGION_LOGDIR_NAME.<a name="line.187"></a>
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getWALDirPaths(final PathFilter filter) throws IOException {<a 
name="line.189"></a>
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HConstants.HREGION_LOGDIR_NAME);<a name="line.190"></a>
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FSUtils.listStatus(fs, walDirPath, filter);<a name="line.191"></a>
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new FileStatus[0]: walDirForServerNames;<a name="line.192"></a>
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dead servers which need recovery work<a name="line.196"></a>
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aren't running but still have WAL files left in file system<a 
name="line.197"></a>
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record the crash server with procedure store, so do not need<a 
name="line.198"></a>
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directory to find out the splitting wal directory any more. Leave<a 
name="line.199"></a>
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{@code RecoverMetaProcedure}(which is also deprecated) uses<a 
name="line.200"></a>
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name="line.201"></a>
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getFailedServersFromLogFolders() {<a name="line.204"></a>
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!conf.getBoolean("hbase.hlog.split.skip.errors",<a name="line.205"></a>
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WALSplitter.SPLIT_SKIP_ERRORS_DEFAULT);<a name="line.206"></a>
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Path(this.rootDir, HConstants.HREGION_LOGDIR_NAME);<a name="line.209"></a>
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name="line.212"></a>
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FSUtils.listStatus(this.fs, logsDirPath, null);<a name="line.218"></a>
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getting log folders to avoid log folder deletion of newly<a name="line.219"></a>
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see HBASE-5916<a name="line.220"></a>
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onlineServers = services.getServerManager().getOnlineServers().keySet();<a 
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logFolders.length == 0) {<a name="line.223"></a>
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name="line.225"></a>
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logFolders) {<a name="line.227"></a>
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FSUtils.listStatus(this.fs, status.getPath(), null);<a name="line.228"></a>
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curLogFiles.length == 0) {<a name="line.229"></a>
+<span class="sourceLineNo">230</span>            // Empty log folder. No 
recovery needed<a name="line.230"></a>
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name="line.234"></a>
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status.getPath() + " doesn't look like its name includes a " +<a 
name="line.236"></a>
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leaving in place. If you see later errors about missing " +<a 
name="line.237"></a>
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may be saved in this location.");<a name="line.238"></a>
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(!onlineServers.contains(serverName)) {<a name="line.239"></a>
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status.getPath() + " doesn't belong "<a name="line.240"></a>
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server, splitting");<a name="line.241"></a>
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serverNames.add(serverName);<a name="line.242"></a>
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name="line.244"></a>
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+<span class="sourceLineNo">246</span>        }<a name="line.246"></a>
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name="line.247"></a>
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name="line.248"></a>
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name="line.250"></a>
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name="line.252"></a>
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name="line.255"></a>
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Thread.sleep(conf.getInt("hbase.hlog.split.failure.retry.interval", 30 * 
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+<span class="sourceLineNo">258</span>        } catch (InterruptedException e) 
{<a name="line.258"></a>
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+<span class="sourceLineNo">260</span>          
Thread.currentThread().interrupt();<a name="line.260"></a>
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name="line.265"></a>
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name="line.267"></a>
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serverName) throws IOException {<a name="line.270"></a>
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splitLog(Collections.&lt;ServerName&gt;singleton(serverName));<a 
name="line.271"></a>
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+<span class="sourceLineNo">273</span><a name="line.273"></a>
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splitting for meta WAL<a name="line.275"></a>
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this server will be split<a name="line.276"></a>
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ServerName serverName) throws IOException {<a name="line.278"></a>
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splitMetaLog(Collections.&lt;ServerName&gt;singleton(serverName));<a 
name="line.279"></a>
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+<span class="sourceLineNo">281</span><a name="line.281"></a>
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+<span class="sourceLineNo">283</span>   * Specialized method to handle the 
splitting for meta WAL<a name="line.283"></a>
+<span class="sourceLineNo">284</span>   * @param serverNames logs belonging to 
these servers will be split<a name="line.284"></a>
+<span class="sourceLineNo">285</span>   */<a name="line.285"></a>
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Set&lt;ServerName&gt; serverNames) throws IOException {<a name="line.286"></a>
+<span class="sourceLineNo">287</span>    splitLog(serverNames, META_FILTER);<a 
name="line.287"></a>
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@edu.umd.cs.findbugs.annotations.SuppressWarnings(value="UL_UNRELEASED_LOCK", 
justification=<a name="line.290"></a>
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set it. Updates to code that uses it should verify use " +<a 
name="line.291"></a>
+<span class="sourceLineNo">292</span>      "of the guard boolean.")<a 
name="line.292"></a>
+<span class="sourceLineNo">293</span>  private List&lt;Path&gt; 
getLogDirs(final Set&lt;ServerName&gt; serverNames) throws IOException {<a 
name="line.293"></a>
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ArrayList&lt;&gt;();<a name="line.294"></a>
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name="line.295"></a>
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{<a name="line.296"></a>
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could have multiple places splitting a same wal<a name="line.297"></a>
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we move to proc-v2?<a name="line.298"></a>
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name="line.299"></a>
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name="line.300"></a>
+<span class="sourceLineNo">301</span>    }<a name="line.301"></a>
+<span class="sourceLineNo">302</span>    try {<a name="line.302"></a>
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serverNames) {<a name="line.303"></a>
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Path(this.rootDir,<a name="line.304"></a>
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AbstractFSWALProvider.getWALDirectoryName(serverName.toString()));<a 
name="line.305"></a>
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logDir.suffix(AbstractFSWALProvider.SPLITTING_EXT);<a name="line.306"></a>
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rogue RS doesn't create more WALs<a name="line.307"></a>
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name="line.308"></a>
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splitDir)) {<a name="line.309"></a>
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fs.rename for log split: " + logDir);<a name="line.310"></a>
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+<span class="sourceLineNo">312</span>          logDir = splitDir;<a 
name="line.312"></a>
+<span class="sourceLineNo">313</span>          LOG.debug("Renamed region 
directory: " + splitDir);<a name="line.313"></a>
+<span class="sourceLineNo">314</span>        } else if (!fs.exists(splitDir)) 
{<a name="line.314"></a>
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+ serverName + " does not exist");<a name="line.315"></a>
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+<span class="sourceLineNo">317</span>        }<a name="line.317"></a>
+<span class="sourceLineNo">318</span>        logDirs.add(splitDir);<a 
name="line.318"></a>
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name="line.320"></a>
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name="line.321"></a>
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name="line.326"></a>
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name="line.327"></a>
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+<span class="sourceLineNo">332</span><a name="line.332"></a>
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Set&lt;ServerName&gt; serverNames) throws IOException {<a name="line.333"></a>
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NON_META_FILTER);<a name="line.334"></a>
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+<span class="sourceLineNo">336</span><a name="line.336"></a>
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that splits WAL files matching a filter. Callers should<a name="line.338"></a>
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and non-meta WALs.<a name="line.339"></a>
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these servers will be split; this will rename the log<a name="line.340"></a>
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from under a soft-failed server<a name="line.341"></a>
+<span class="sourceLineNo">342</span>   */<a name="line.342"></a>
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Set&lt;ServerName&gt; serverNames, PathFilter filter) throws IOException {<a 
name="line.343"></a>
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0;<a name="line.344"></a>
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getLogDirs(serverNames);<a name="line.345"></a>
+<span class="sourceLineNo">346</span><a name="line.346"></a>
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splitLogManager.handleDeadWorkers(serverNames);<a name="line.347"></a>
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EnvironmentEdgeManager.currentTime();<a name="line.348"></a>
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splitLogManager.splitLogDistributed(serverNames, logDirs, filter);<a 
name="line.349"></a>
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EnvironmentEdgeManager.currentTime() - splitTime;<a name="line.350"></a>
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null) {<a name="line.352"></a>
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name="line.353"></a>
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this.metricsMasterFilesystem.addMetaWALSplit(splitTime, splitLogSize);<a 
name="line.354"></a>
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this.metricsMasterFilesystem.addSplit(splitTime, splitLogSize);<a 
name="line.356"></a>
+<span class="sourceLineNo">357</span>      }<a name="line.357"></a>
+<span class="sourceLineNo">358</span>    }<a name="line.358"></a>
+<span class="sourceLineNo">359</span>  }<a name="line.359"></a>
+<span class="sourceLineNo">360</span><a name="line.360"></a>
+<span class="sourceLineNo">361</span>  /**<a name="line.361"></a>
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normally on a server, it may leave some meta<a name="line.362"></a>
+<span class="sourceLineNo">363</span>   * WAL in the server's wal dir. Since 
meta region is no long on this server,<a name="line.363"></a>
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just leaving them there. So deleting<a name="line.364"></a>
+<span class="sourceLineNo">365</span>   * the wal dir will fail since the dir 
is not empty. Actually We can safely achive those<a name="line.365"></a>
+<span class="sourceLineNo">366</span>   * meta log and Archiving the meta log 
and delete the dir.<a name="line.366"></a>
+<span class="sourceLineNo">367</span>   * @param serverName the server to 
archive meta log<a name="line.367"></a>
+<span class="sourceLineNo">368</span>   */<a name="line.368"></a>
+<span class="sourceLineNo">369</span>  public void archiveMetaLog(final 
ServerName serverName) {<a name="line.369"></a>
+<span class="sourceLineNo">370</span>    try {<a name="line.370"></a>
+<span class="sourceLineNo">371</span>      Path logDir = new 
Path(this.rootDir,<a name="line.371"></a>
+<span class="sourceLineNo">372</span>          
AbstractFSWALProvider.getWALDirectoryName(serverName.toString()));<a 
name="line.372"></a>
+<span class="sourceLineNo">373</span>      Path splitDir = 
logDir.suffix(AbstractFSWALProvider.SPLITTING_EXT);<a name="line.373"></a>
+<span class="sourceLineNo">374</span>      if (fs.exists(splitDir)) {<a 
name="line.374"></a>
+<span class="sourceLineNo">375</span>        FileStatus[] logfiles = 
FSUtils.listStatus(fs, splitDir, META_FILTER);<a name="line.375"></a>
+<span class="sourceLineNo">376</span>        if (logfiles != null) {<a 
name="line.376"></a>
+<span class="sourceLineNo">377</span>          for (FileStatus status : 
logfiles) {<a name="line.377"></a>
+<span class="sourceLineNo">378</span>            if (!status.isDir()) {<a 
name="line.378"></a>
+<span class="sourceLineNo">379</span>              Path newPath = 
AbstractFSWAL.getWALArchivePath(this.oldLogDir,<a name="line.379"></a>
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name="line.380"></a>
+<span class="sourceLineNo">381</span>              if 
(!FSUtils.renameAndSetModifyTime(fs, status.getPath(), newPath)) {<a 
name="line.381"></a>
+<span class="sourceLineNo">382</span>                LOG.warn("Unable to move  
" + status.getPath() + " to " + newPath);<a name="line.382"></a>
+<span class="sourceLineNo">383</span>              } else {<a 
name="line.383"></a>
+<span class="sourceLineNo">384</span>                LOG.debug("Archived meta 
log " + status.getPath() + " to " + newPath);<a name="line.384"></a>
+<span class="sourceLineNo">385</span>              }<a name="line.385"></a>
+<span class="sourceLineNo">386</span>            }<a name="line.386"></a>
+<span class="sourceLineNo">387</span>          }<a name="line.387"></a>
+<span class="sourceLineNo">388</span>        }<a name="line.388"></a>
+<span class="sourceLineNo">389</span>        if (!fs.delete(splitDir, false)) 
{<a name="line.389"></a>
+<span class="sourceLineNo">390</span>          LOG.warn("Unable to delete log 
dir. Ignoring. " + splitDir);<a name="line.390"></a>
+<span class="sourceLineNo">391</span>        }<a name="line.391"></a>
+<span class="sourceLineNo">392</span>      }<a name="line.392"></a>
+<span class="sourceLineNo">393</span>    } catch (IOException ie) {<a 
name="line.393"></a>
+<span class="sourceLineNo">394</span>      LOG.warn("Failed archiving meta log 
for server " + serverName, ie);<a name="line.394"></a>
+<span class="sourceLineNo">395</span>    }<a name="line.395"></a>
+<span class="sourceLineNo">396</span>  }<a name="line.396"></a>
+<span class="sourceLineNo">397</span><a name="line.397"></a>
+<span class="sourceLineNo">398</span><a name="line.398"></a>
+<span class="sourceLineNo">399</span>}<a name="line.399"></a>
 
 
 

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