http://git-wip-us.apache.org/repos/asf/hbase-site/blob/2e694a8e/devapidocs/src-html/org/apache/hadoop/hbase/master/MasterWalManager.html
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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<ServerName>
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 ->
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<ServerName>
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 ->
!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<ServerName>
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 -> {<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 -> 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<ServerName>
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<ServerName> serverNames =
new HashSet<>();<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<ServerName>
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>
-<span class="sourceLineNo">256</span> }<a name="line.256"></a>
-<span class="sourceLineNo">257</span> } catch (InterruptedException e)
{<a name="line.257"></a>
-<span class="sourceLineNo">258</span> LOG.warn("Interrupted, aborting
since cannot return w/o splitting");<a name="line.258"></a>
-<span class="sourceLineNo">259</span>
Thread.currentThread().interrupt();<a name="line.259"></a>
-<span class="sourceLineNo">260</span> retrySplitting = false;<a
name="line.260"></a>
-<span class="sourceLineNo">261</span> Runtime.getRuntime().halt(1);<a
name="line.261"></a>
-<span class="sourceLineNo">262</span> }<a name="line.262"></a>
-<span class="sourceLineNo">263</span> }<a name="line.263"></a>
-<span class="sourceLineNo">264</span> } while (retrySplitting);<a
name="line.264"></a>
-<span class="sourceLineNo">265</span><a name="line.265"></a>
-<span class="sourceLineNo">266</span> return serverNames;<a
name="line.266"></a>
-<span class="sourceLineNo">267</span> }<a name="line.267"></a>
-<span class="sourceLineNo">268</span><a name="line.268"></a>
-<span class="sourceLineNo">269</span> public void splitLog(final ServerName
serverName) throws IOException {<a name="line.269"></a>
-<span class="sourceLineNo">270</span>
splitLog(Collections.<ServerName>singleton(serverName));<a
name="line.270"></a>
-<span class="sourceLineNo">271</span> }<a name="line.271"></a>
-<span class="sourceLineNo">272</span><a name="line.272"></a>
-<span class="sourceLineNo">273</span> /**<a name="line.273"></a>
-<span class="sourceLineNo">274</span> * Specialized method to handle the
splitting for meta WAL<a name="line.274"></a>
-<span class="sourceLineNo">275</span> * @param serverName logs belonging to
this server will be split<a name="line.275"></a>
-<span class="sourceLineNo">276</span> */<a name="line.276"></a>
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ServerName serverName) throws IOException {<a name="line.277"></a>
-<span class="sourceLineNo">278</span>
splitMetaLog(Collections.<ServerName>singleton(serverName));<a
name="line.278"></a>
-<span class="sourceLineNo">279</span> }<a name="line.279"></a>
-<span class="sourceLineNo">280</span><a name="line.280"></a>
-<span class="sourceLineNo">281</span> /**<a name="line.281"></a>
-<span class="sourceLineNo">282</span> * Specialized method to handle the
splitting for meta WAL<a name="line.282"></a>
-<span class="sourceLineNo">283</span> * @param serverNames logs belonging to
these servers will be split<a name="line.283"></a>
-<span class="sourceLineNo">284</span> */<a name="line.284"></a>
-<span class="sourceLineNo">285</span> public void splitMetaLog(final
Set<ServerName> serverNames) throws IOException {<a name="line.285"></a>
-<span class="sourceLineNo">286</span> splitLog(serverNames, META_FILTER);<a
name="line.286"></a>
-<span class="sourceLineNo">287</span> }<a name="line.287"></a>
-<span class="sourceLineNo">288</span><a name="line.288"></a>
-<span class="sourceLineNo">289</span>
@edu.umd.cs.findbugs.annotations.SuppressWarnings(value="UL_UNRELEASED_LOCK",
justification=<a name="line.289"></a>
-<span class="sourceLineNo">290</span> "We only release this lock when we
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>
-<span class="sourceLineNo">292</span> private List<Path>
getLogDirs(final Set<ServerName> serverNames) throws IOException {<a
name="line.292"></a>
-<span class="sourceLineNo">293</span> List<Path> logDirs = new
ArrayList<>();<a name="line.293"></a>
-<span class="sourceLineNo">294</span> boolean needReleaseLock = false;<a
name="line.294"></a>
-<span class="sourceLineNo">295</span> if (!this.services.isInitialized())
{<a name="line.295"></a>
-<span class="sourceLineNo">296</span> // during master initialization, we
could have multiple places splitting a same wal<a name="line.296"></a>
-<span class="sourceLineNo">297</span> // XXX: Does this still exist after
we move to proc-v2?<a name="line.297"></a>
-<span class="sourceLineNo">298</span> this.splitLogLock.lock();<a
name="line.298"></a>
-<span class="sourceLineNo">299</span> needReleaseLock = true;<a
name="line.299"></a>
-<span class="sourceLineNo">300</span> }<a name="line.300"></a>
-<span class="sourceLineNo">301</span> try {<a name="line.301"></a>
-<span class="sourceLineNo">302</span> for (ServerName serverName :
serverNames) {<a name="line.302"></a>
-<span class="sourceLineNo">303</span> Path logDir = new
Path(this.rootDir,<a name="line.303"></a>
-<span class="sourceLineNo">304</span>
AbstractFSWALProvider.getWALDirectoryName(serverName.toString()));<a
name="line.304"></a>
-<span class="sourceLineNo">305</span> Path splitDir =
logDir.suffix(AbstractFSWALProvider.SPLITTING_EXT);<a name="line.305"></a>
-<span class="sourceLineNo">306</span> // Rename the directory so a
rogue RS doesn't create more WALs<a name="line.306"></a>
-<span class="sourceLineNo">307</span> if (fs.exists(logDir)) {<a
name="line.307"></a>
-<span class="sourceLineNo">308</span> if (!this.fs.rename(logDir,
splitDir)) {<a name="line.308"></a>
-<span class="sourceLineNo">309</span> throw new IOException("Failed
fs.rename for log split: " + logDir);<a name="line.309"></a>
-<span class="sourceLineNo">310</span> }<a name="line.310"></a>
-<span class="sourceLineNo">311</span> logDir = splitDir;<a
name="line.311"></a>
-<span class="sourceLineNo">312</span> LOG.debug("Renamed region
directory: " + splitDir);<a name="line.312"></a>
-<span class="sourceLineNo">313</span> } else if (!fs.exists(splitDir))
{<a name="line.313"></a>
-<span class="sourceLineNo">314</span> LOG.info("Log dir for server "
+ serverName + " does not exist");<a name="line.314"></a>
-<span class="sourceLineNo">315</span> continue;<a name="line.315"></a>
-<span class="sourceLineNo">316</span> }<a name="line.316"></a>
-<span class="sourceLineNo">317</span> logDirs.add(splitDir);<a
name="line.317"></a>
-<span class="sourceLineNo">318</span> }<a name="line.318"></a>
-<span class="sourceLineNo">319</span> } catch (IOException ioe) {<a
name="line.319"></a>
-<span class="sourceLineNo">320</span> if (!checkFileSystem()) {<a
name="line.320"></a>
-<span class="sourceLineNo">321</span> this.services.abort("Aborting due
to filesystem unavailable", ioe);<a name="line.321"></a>
-<span class="sourceLineNo">322</span> throw ioe;<a name="line.322"></a>
-<span class="sourceLineNo">323</span> }<a name="line.323"></a>
-<span class="sourceLineNo">324</span> } finally {<a name="line.324"></a>
-<span class="sourceLineNo">325</span> if (needReleaseLock) {<a
name="line.325"></a>
-<span class="sourceLineNo">326</span> this.splitLogLock.unlock();<a
name="line.326"></a>
-<span class="sourceLineNo">327</span> }<a name="line.327"></a>
-<span class="sourceLineNo">328</span> }<a name="line.328"></a>
-<span class="sourceLineNo">329</span> return logDirs;<a name="line.329"></a>
-<span class="sourceLineNo">330</span> }<a name="line.330"></a>
-<span class="sourceLineNo">331</span><a name="line.331"></a>
-<span class="sourceLineNo">332</span> public void splitLog(final
Set<ServerName> serverNames) throws IOException {<a name="line.332"></a>
-<span class="sourceLineNo">333</span> splitLog(serverNames,
NON_META_FILTER);<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> * This method is the base split method
that splits WAL files matching a filter. Callers should<a name="line.337"></a>
-<span class="sourceLineNo">338</span> * pass the appropriate filter for meta
and non-meta WALs.<a name="line.338"></a>
-<span class="sourceLineNo">339</span> * @param serverNames logs belonging to
these servers will be split; this will rename the log<a name="line.339"></a>
-<span class="sourceLineNo">340</span> * directory out
from under a soft-failed server<a name="line.340"></a>
-<span class="sourceLineNo">341</span> */<a name="line.341"></a>
-<span class="sourceLineNo">342</span> public void splitLog(final
Set<ServerName> serverNames, PathFilter filter) throws IOException {<a
name="line.342"></a>
-<span class="sourceLineNo">343</span> long splitTime = 0, splitLogSize =
0;<a name="line.343"></a>
-<span class="sourceLineNo">344</span> List<Path> logDirs =
getLogDirs(serverNames);<a name="line.344"></a>
-<span class="sourceLineNo">345</span><a name="line.345"></a>
-<span class="sourceLineNo">346</span>
splitLogManager.handleDeadWorkers(serverNames);<a name="line.346"></a>
-<span class="sourceLineNo">347</span> splitTime =
EnvironmentEdgeManager.currentTime();<a name="line.347"></a>
-<span class="sourceLineNo">348</span> splitLogSize =
splitLogManager.splitLogDistributed(serverNames, logDirs, filter);<a
name="line.348"></a>
-<span class="sourceLineNo">349</span> splitTime =
EnvironmentEdgeManager.currentTime() - splitTime;<a name="line.349"></a>
-<span class="sourceLineNo">350</span><a name="line.350"></a>
-<span class="sourceLineNo">351</span> if (this.metricsMasterFilesystem !=
null) {<a name="line.351"></a>
-<span class="sourceLineNo">352</span> if (filter == META_FILTER) {<a
name="line.352"></a>
-<span class="sourceLineNo">353</span>
this.metricsMasterFilesystem.addMetaWALSplit(splitTime, splitLogSize);<a
name="line.353"></a>
-<span class="sourceLineNo">354</span> } else {<a name="line.354"></a>
-<span class="sourceLineNo">355</span>
this.metricsMasterFilesystem.addSplit(splitTime, splitLogSize);<a
name="line.355"></a>
-<span class="sourceLineNo">356</span> }<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">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<ServerName>
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 ->
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<ServerName>
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 ->
!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>
+<span class="sourceLineNo">169</span> * @return listing of ServerNames found
by parsing WAL directory paths in FS.<a name="line.169"></a>
+<span class="sourceLineNo">170</span> *<a name="line.170"></a>
+<span class="sourceLineNo">171</span> */<a name="line.171"></a>
+<span class="sourceLineNo">172</span> public Set<ServerName>
getServerNamesFromWALDirPath(final PathFilter filter) throws IOException {<a
name="line.172"></a>
+<span class="sourceLineNo">173</span> FileStatus[] walDirForServerNames =
getWALDirPaths(filter);<a name="line.173"></a>
+<span class="sourceLineNo">174</span> return
Stream.of(walDirForServerNames).map(s -> {<a name="line.174"></a>
+<span class="sourceLineNo">175</span> ServerName serverName =
AbstractFSWALProvider.getServerNameFromWALDirectoryName(s.getPath());<a
name="line.175"></a>
+<span class="sourceLineNo">176</span> if (serverName == null) {<a
name="line.176"></a>
+<span class="sourceLineNo">177</span> LOG.warn("Log folder {} doesn't
look like its name includes a " +<a name="line.177"></a>
+<span class="sourceLineNo">178</span> "region server name; leaving in
place. If you see later errors about missing " +<a name="line.178"></a>
+<span class="sourceLineNo">179</span> "write ahead logs they may be
saved in this location.", s.getPath());<a name="line.179"></a>
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name="line.180"></a>
+<span class="sourceLineNo">181</span> }<a name="line.181"></a>
+<span class="sourceLineNo">182</span> return serverName;<a
name="line.182"></a>
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null).collect(Collectors.toSet());<a name="line.183"></a>
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+<span class="sourceLineNo">185</span><a name="line.185"></a>
+<span class="sourceLineNo">186</span> /**<a name="line.186"></a>
+<span class="sourceLineNo">187</span> * @return List of all RegionServer WAL
dirs; i.e. this.rootDir/HConstants.HREGION_LOGDIR_NAME.<a name="line.187"></a>
+<span class="sourceLineNo">188</span> */<a name="line.188"></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>
+<span class="sourceLineNo">192</span> return walDirForServerNames == null?
new FileStatus[0]: walDirForServerNames;<a name="line.192"></a>
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+<span class="sourceLineNo">194</span><a name="line.194"></a>
+<span class="sourceLineNo">195</span> /**<a name="line.195"></a>
+<span class="sourceLineNo">196</span> * Inspect the log directory to find
dead servers which need recovery work<a name="line.196"></a>
+<span class="sourceLineNo">197</span> * @return A set of ServerNames which
aren't running but still have WAL files left in file system<a
name="line.197"></a>
+<span class="sourceLineNo">198</span> * @deprecated With proc-v2, we can
record the crash server with procedure store, so do not need<a
name="line.198"></a>
+<span class="sourceLineNo">199</span> * to scan the wal
directory to find out the splitting wal directory any more. Leave<a
name="line.199"></a>
+<span class="sourceLineNo">200</span> * it here only because
{@code RecoverMetaProcedure}(which is also deprecated) uses<a
name="line.200"></a>
+<span class="sourceLineNo">201</span> * it.<a
name="line.201"></a>
+<span class="sourceLineNo">202</span> */<a name="line.202"></a>
+<span class="sourceLineNo">203</span> @Deprecated<a name="line.203"></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>
+<span class="sourceLineNo">206</span>
WALSplitter.SPLIT_SKIP_ERRORS_DEFAULT);<a name="line.206"></a>
+<span class="sourceLineNo">207</span><a name="line.207"></a>
+<span class="sourceLineNo">208</span> Set<ServerName> serverNames =
new HashSet<>();<a name="line.208"></a>
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Path(this.rootDir, HConstants.HREGION_LOGDIR_NAME);<a name="line.209"></a>
+<span class="sourceLineNo">210</span><a name="line.210"></a>
+<span class="sourceLineNo">211</span> do {<a name="line.211"></a>
+<span class="sourceLineNo">212</span> if (services.isStopped()) {<a
name="line.212"></a>
+<span class="sourceLineNo">213</span> LOG.warn("Master stopped while
trying to get failed servers.");<a name="line.213"></a>
+<span class="sourceLineNo">214</span> break;<a name="line.214"></a>
+<span class="sourceLineNo">215</span> }<a name="line.215"></a>
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+<span class="sourceLineNo">217</span> if (!this.fs.exists(logsDirPath))
return serverNames;<a name="line.217"></a>
+<span class="sourceLineNo">218</span> FileStatus[] logFolders =
FSUtils.listStatus(this.fs, logsDirPath, null);<a name="line.218"></a>
+<span class="sourceLineNo">219</span> // Get online servers after
getting log folders to avoid log folder deletion of newly<a name="line.219"></a>
+<span class="sourceLineNo">220</span> // checked in region servers .
see HBASE-5916<a name="line.220"></a>
+<span class="sourceLineNo">221</span> Set<ServerName>
onlineServers = services.getServerManager().getOnlineServers().keySet();<a
name="line.221"></a>
+<span class="sourceLineNo">222</span><a name="line.222"></a>
+<span class="sourceLineNo">223</span> if (logFolders == null ||
logFolders.length == 0) {<a name="line.223"></a>
+<span class="sourceLineNo">224</span> LOG.debug("No log files to
split, proceeding...");<a name="line.224"></a>
+<span class="sourceLineNo">225</span> return serverNames;<a
name="line.225"></a>
+<span class="sourceLineNo">226</span> }<a name="line.226"></a>
+<span class="sourceLineNo">227</span> for (FileStatus status :
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.231"></a>
+<span class="sourceLineNo">232</span> }<a name="line.232"></a>
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AbstractFSWALProvider.getServerNameFromWALDirectoryName(<a name="line.233"></a>
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name="line.234"></a>
+<span class="sourceLineNo">235</span> if (null == serverName) {<a
name="line.235"></a>
+<span class="sourceLineNo">236</span> LOG.warn("Log folder " +
status.getPath() + " doesn't look like its name includes a " +<a
name="line.236"></a>
+<span class="sourceLineNo">237</span> "region server name;
leaving in place. If you see later errors about missing " +<a
name="line.237"></a>
+<span class="sourceLineNo">238</span> "write ahead logs they
may be saved in this location.");<a name="line.238"></a>
+<span class="sourceLineNo">239</span> } else if
(!onlineServers.contains(serverName)) {<a name="line.239"></a>
+<span class="sourceLineNo">240</span> LOG.info("Log folder " +
status.getPath() + " doesn't belong "<a name="line.240"></a>
+<span class="sourceLineNo">241</span> + "to a known region
server, splitting");<a name="line.241"></a>
+<span class="sourceLineNo">242</span>
serverNames.add(serverName);<a name="line.242"></a>
+<span class="sourceLineNo">243</span> } else {<a name="line.243"></a>
+<span class="sourceLineNo">244</span> LOG.info("Log folder " +
status.getPath() + " belongs to an existing region server");<a
name="line.244"></a>
+<span class="sourceLineNo">245</span> }<a name="line.245"></a>
+<span class="sourceLineNo">246</span> }<a name="line.246"></a>
+<span class="sourceLineNo">247</span> retrySplitting = false;<a
name="line.247"></a>
+<span class="sourceLineNo">248</span> } catch (IOException ioe) {<a
name="line.248"></a>
+<span class="sourceLineNo">249</span> LOG.warn("Failed getting failed
servers to be recovered.", ioe);<a name="line.249"></a>
+<span class="sourceLineNo">250</span> if (!checkFileSystem()) {<a
name="line.250"></a>
+<span class="sourceLineNo">251</span> LOG.warn("Bad Filesystem,
exiting");<a name="line.251"></a>
+<span class="sourceLineNo">252</span> Runtime.getRuntime().halt(1);<a
name="line.252"></a>
+<span class="sourceLineNo">253</span> }<a name="line.253"></a>
+<span class="sourceLineNo">254</span> try {<a name="line.254"></a>
+<span class="sourceLineNo">255</span> if (retrySplitting) {<a
name="line.255"></a>
+<span class="sourceLineNo">256</span>
Thread.sleep(conf.getInt("hbase.hlog.split.failure.retry.interval", 30 *
1000));<a name="line.256"></a>
+<span class="sourceLineNo">257</span> }<a name="line.257"></a>
+<span class="sourceLineNo">258</span> } catch (InterruptedException e)
{<a name="line.258"></a>
+<span class="sourceLineNo">259</span> LOG.warn("Interrupted, aborting
since cannot return w/o splitting");<a name="line.259"></a>
+<span class="sourceLineNo">260</span>
Thread.currentThread().interrupt();<a name="line.260"></a>
+<span class="sourceLineNo">261</span> retrySplitting = false;<a
name="line.261"></a>
+<span class="sourceLineNo">262</span> Runtime.getRuntime().halt(1);<a
name="line.262"></a>
+<span class="sourceLineNo">263</span> }<a name="line.263"></a>
+<span class="sourceLineNo">264</span> }<a name="line.264"></a>
+<span class="sourceLineNo">265</span> } while (retrySplitting);<a
name="line.265"></a>
+<span class="sourceLineNo">266</span><a name="line.266"></a>
+<span class="sourceLineNo">267</span> return serverNames;<a
name="line.267"></a>
+<span class="sourceLineNo">268</span> }<a name="line.268"></a>
+<span class="sourceLineNo">269</span><a name="line.269"></a>
+<span class="sourceLineNo">270</span> public void splitLog(final ServerName
serverName) throws IOException {<a name="line.270"></a>
+<span class="sourceLineNo">271</span>
splitLog(Collections.<ServerName>singleton(serverName));<a
name="line.271"></a>
+<span class="sourceLineNo">272</span> }<a name="line.272"></a>
+<span class="sourceLineNo">273</span><a name="line.273"></a>
+<span class="sourceLineNo">274</span> /**<a name="line.274"></a>
+<span class="sourceLineNo">275</span> * Specialized method to handle the
splitting for meta WAL<a name="line.275"></a>
+<span class="sourceLineNo">276</span> * @param serverName logs belonging to
this server will be split<a name="line.276"></a>
+<span class="sourceLineNo">277</span> */<a name="line.277"></a>
+<span class="sourceLineNo">278</span> public void splitMetaLog(final
ServerName serverName) throws IOException {<a name="line.278"></a>
+<span class="sourceLineNo">279</span>
splitMetaLog(Collections.<ServerName>singleton(serverName));<a
name="line.279"></a>
+<span class="sourceLineNo">280</span> }<a name="line.280"></a>
+<span class="sourceLineNo">281</span><a name="line.281"></a>
+<span class="sourceLineNo">282</span> /**<a name="line.282"></a>
+<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<ServerName> serverNames) throws IOException {<a name="line.286"></a>
+<span class="sourceLineNo">287</span> splitLog(serverNames, META_FILTER);<a
name="line.287"></a>
+<span class="sourceLineNo">288</span> }<a name="line.288"></a>
+<span class="sourceLineNo">289</span><a name="line.289"></a>
+<span class="sourceLineNo">290</span>
@edu.umd.cs.findbugs.annotations.SuppressWarnings(value="UL_UNRELEASED_LOCK",
justification=<a name="line.290"></a>
+<span class="sourceLineNo">291</span> "We only release this lock when we
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<Path>
getLogDirs(final Set<ServerName> serverNames) throws IOException {<a
name="line.293"></a>
+<span class="sourceLineNo">294</span> List<Path> logDirs = new
ArrayList<>();<a name="line.294"></a>
+<span class="sourceLineNo">295</span> boolean needReleaseLock = false;<a
name="line.295"></a>
+<span class="sourceLineNo">296</span> if (!this.services.isInitialized())
{<a name="line.296"></a>
+<span class="sourceLineNo">297</span> // during master initialization, we
could have multiple places splitting a same wal<a name="line.297"></a>
+<span class="sourceLineNo">298</span> // XXX: Does this still exist after
we move to proc-v2?<a name="line.298"></a>
+<span class="sourceLineNo">299</span> this.splitLogLock.lock();<a
name="line.299"></a>
+<span class="sourceLineNo">300</span> needReleaseLock = true;<a
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>
+<span class="sourceLineNo">303</span> for (ServerName serverName :
serverNames) {<a name="line.303"></a>
+<span class="sourceLineNo">304</span> Path logDir = new
Path(this.rootDir,<a name="line.304"></a>
+<span class="sourceLineNo">305</span>
AbstractFSWALProvider.getWALDirectoryName(serverName.toString()));<a
name="line.305"></a>
+<span class="sourceLineNo">306</span> Path splitDir =
logDir.suffix(AbstractFSWALProvider.SPLITTING_EXT);<a name="line.306"></a>
+<span class="sourceLineNo">307</span> // Rename the directory so a
rogue RS doesn't create more WALs<a name="line.307"></a>
+<span class="sourceLineNo">308</span> if (fs.exists(logDir)) {<a
name="line.308"></a>
+<span class="sourceLineNo">309</span> if (!this.fs.rename(logDir,
splitDir)) {<a name="line.309"></a>
+<span class="sourceLineNo">310</span> throw new IOException("Failed
fs.rename for log split: " + logDir);<a name="line.310"></a>
+<span class="sourceLineNo">311</span> }<a name="line.311"></a>
+<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>
+<span class="sourceLineNo">315</span> LOG.info("Log dir for server "
+ serverName + " does not exist");<a name="line.315"></a>
+<span class="sourceLineNo">316</span> continue;<a name="line.316"></a>
+<span class="sourceLineNo">317</span> }<a name="line.317"></a>
+<span class="sourceLineNo">318</span> logDirs.add(splitDir);<a
name="line.318"></a>
+<span class="sourceLineNo">319</span> }<a name="line.319"></a>
+<span class="sourceLineNo">320</span> } catch (IOException ioe) {<a
name="line.320"></a>
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name="line.321"></a>
+<span class="sourceLineNo">322</span> this.services.abort("Aborting due
to filesystem unavailable", ioe);<a name="line.322"></a>
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+<span class="sourceLineNo">324</span> }<a name="line.324"></a>
+<span class="sourceLineNo">325</span> } finally {<a name="line.325"></a>
+<span class="sourceLineNo">326</span> if (needReleaseLock) {<a
name="line.326"></a>
+<span class="sourceLineNo">327</span> this.splitLogLock.unlock();<a
name="line.327"></a>
+<span class="sourceLineNo">328</span> }<a name="line.328"></a>
+<span class="sourceLineNo">329</span> }<a name="line.329"></a>
+<span class="sourceLineNo">330</span> return logDirs;<a name="line.330"></a>
+<span class="sourceLineNo">331</span> }<a name="line.331"></a>
+<span class="sourceLineNo">332</span><a name="line.332"></a>
+<span class="sourceLineNo">333</span> public void splitLog(final
Set<ServerName> serverNames) throws IOException {<a name="line.333"></a>
+<span class="sourceLineNo">334</span> splitLog(serverNames,
NON_META_FILTER);<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> /**<a name="line.337"></a>
+<span class="sourceLineNo">338</span> * This method is the base split method
that splits WAL files matching a filter. Callers should<a name="line.338"></a>
+<span class="sourceLineNo">339</span> * pass the appropriate filter for meta
and non-meta WALs.<a name="line.339"></a>
+<span class="sourceLineNo">340</span> * @param serverNames logs belonging to
these servers will be split; this will rename the log<a name="line.340"></a>
+<span class="sourceLineNo">341</span> * directory out
from under a soft-failed server<a name="line.341"></a>
+<span class="sourceLineNo">342</span> */<a name="line.342"></a>
+<span class="sourceLineNo">343</span> public void splitLog(final
Set<ServerName> serverNames, PathFilter filter) throws IOException {<a
name="line.343"></a>
+<span class="sourceLineNo">344</span> long splitTime = 0, splitLogSize =
0;<a name="line.344"></a>
+<span class="sourceLineNo">345</span> List<Path> logDirs =
getLogDirs(serverNames);<a name="line.345"></a>
+<span class="sourceLineNo">346</span><a name="line.346"></a>
+<span class="sourceLineNo">347</span>
splitLogManager.handleDeadWorkers(serverNames);<a name="line.347"></a>
+<span class="sourceLineNo">348</span> splitTime =
EnvironmentEdgeManager.currentTime();<a name="line.348"></a>
+<span class="sourceLineNo">349</span> splitLogSize =
splitLogManager.splitLogDistributed(serverNames, logDirs, filter);<a
name="line.349"></a>
+<span class="sourceLineNo">350</span> splitTime =
EnvironmentEdgeManager.currentTime() - splitTime;<a name="line.350"></a>
+<span class="sourceLineNo">351</span><a name="line.351"></a>
+<span class="sourceLineNo">352</span> if (this.metricsMasterFilesystem !=
null) {<a name="line.352"></a>
+<span class="sourceLineNo">353</span> if (filter == META_FILTER) {<a
name="line.353"></a>
+<span class="sourceLineNo">354</span>
this.metricsMasterFilesystem.addMetaWALSplit(splitTime, splitLogSize);<a
name="line.354"></a>
+<span class="sourceLineNo">355</span> } else {<a name="line.355"></a>
+<span class="sourceLineNo">356</span>
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>
+<span class="sourceLineNo">362</span> * For meta region open and closed
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>
+<span class="sourceLineNo">364</span> * The SCP won't split those meta wals,
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>
+<span class="sourceLineNo">380</span> status.getPath());<a
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>
