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Posted to commits@hbase.apache.org by gi...@apache.org on 2017/06/14 15:00:03 UTC
[12/20] hbase-site git commit: Published site at
82d554e3783372cc6b05489452c815b57c06f6cd.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/aa46da47/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/store/wal/ProcedureWALFormatReader.Entry.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/store/wal/ProcedureWALFormatReader.Entry.html b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/store/wal/ProcedureWALFormatReader.Entry.html
index c17d1b1..b1f9eeb 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/store/wal/ProcedureWALFormatReader.Entry.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/procedure2/store/wal/ProcedureWALFormatReader.Entry.html
@@ -52,7 +52,7 @@
<span class="sourceLineNo">044</span> private static final Log LOG = LogFactory.getLog(ProcedureWALFormatReader.class);<a name="line.44"></a>
<span class="sourceLineNo">045</span><a name="line.45"></a>
<span class="sourceLineNo">046</span> // ==============================================================================================<a name="line.46"></a>
-<span class="sourceLineNo">047</span> // We read the WALs in reverse order. from the newest to the oldest.<a name="line.47"></a>
+<span class="sourceLineNo">047</span> // We read the WALs in reverse order from the newest to the oldest.<a name="line.47"></a>
<span class="sourceLineNo">048</span> // We have different entry types:<a name="line.48"></a>
<span class="sourceLineNo">049</span> // - INIT: Procedure submitted by the user (also known as 'root procedure')<a name="line.49"></a>
<span class="sourceLineNo">050</span> // - INSERT: Children added to the procedure <parentId>:[<childId>, ...]<a name="line.50"></a>
@@ -61,777 +61,822 @@
<span class="sourceLineNo">053</span> //<a name="line.53"></a>
<span class="sourceLineNo">054</span> // In the WAL we can find multiple times the same procedure as UPDATE or INSERT.<a name="line.54"></a>
<span class="sourceLineNo">055</span> // We read the WAL from top to bottom, so every time we find an entry of the<a name="line.55"></a>
-<span class="sourceLineNo">056</span> // same procedure, that will be the "latest" update.<a name="line.56"></a>
-<span class="sourceLineNo">057</span> //<a name="line.57"></a>
-<span class="sourceLineNo">058</span> // We keep two in-memory maps:<a name="line.58"></a>
-<span class="sourceLineNo">059</span> // - localProcedureMap: is the map containing the entries in the WAL we are processing<a name="line.59"></a>
-<span class="sourceLineNo">060</span> // - procedureMap: is the map containing all the procedures we found up to the WAL in process.<a name="line.60"></a>
-<span class="sourceLineNo">061</span> // localProcedureMap is merged with the procedureMap once we reach the WAL EOF.<a name="line.61"></a>
-<span class="sourceLineNo">062</span> //<a name="line.62"></a>
-<span class="sourceLineNo">063</span> // Since we are reading the WALs in reverse order (newest to oldest),<a name="line.63"></a>
-<span class="sourceLineNo">064</span> // if we find an entry related to a procedure we already have in 'procedureMap' we can discard it.<a name="line.64"></a>
-<span class="sourceLineNo">065</span> //<a name="line.65"></a>
-<span class="sourceLineNo">066</span> // The WAL is append-only so the last procedure in the WAL is the one that<a name="line.66"></a>
-<span class="sourceLineNo">067</span> // was in execution at the time we crashed/closed the server.<a name="line.67"></a>
-<span class="sourceLineNo">068</span> // given that, the procedure replay order can be inferred by the WAL order.<a name="line.68"></a>
-<span class="sourceLineNo">069</span> //<a name="line.69"></a>
-<span class="sourceLineNo">070</span> // Example:<a name="line.70"></a>
-<span class="sourceLineNo">071</span> // WAL-2: [A, B, A, C, D]<a name="line.71"></a>
-<span class="sourceLineNo">072</span> // WAL-1: [F, G, A, F, B]<a name="line.72"></a>
-<span class="sourceLineNo">073</span> // Replay-Order: [D, C, A, B, F, G]<a name="line.73"></a>
-<span class="sourceLineNo">074</span> //<a name="line.74"></a>
-<span class="sourceLineNo">075</span> // The "localProcedureMap" keeps a "replayOrder" list. Every time we add the<a name="line.75"></a>
-<span class="sourceLineNo">076</span> // record to the map that record is moved to the head of the "replayOrder" list.<a name="line.76"></a>
-<span class="sourceLineNo">077</span> // Using the example above:<a name="line.77"></a>
-<span class="sourceLineNo">078</span> // WAL-2 localProcedureMap.replayOrder is [D, C, A, B]<a name="line.78"></a>
-<span class="sourceLineNo">079</span> // WAL-1 localProcedureMap.replayOrder is [F, G]<a name="line.79"></a>
-<span class="sourceLineNo">080</span> //<a name="line.80"></a>
-<span class="sourceLineNo">081</span> // each time we reach the WAL-EOF, the "replayOrder" list is merged/appended in 'procedureMap'<a name="line.81"></a>
-<span class="sourceLineNo">082</span> // so using the example above we end up with: [D, C, A, B] + [F, G] as replay order.<a name="line.82"></a>
-<span class="sourceLineNo">083</span> //<a name="line.83"></a>
-<span class="sourceLineNo">084</span> // Fast Start: INIT/INSERT record and StackIDs<a name="line.84"></a>
-<span class="sourceLineNo">085</span> // ---------------------------------------------<a name="line.85"></a>
-<span class="sourceLineNo">086</span> // We have two special records, INIT and INSERT, that track the first time<a name="line.86"></a>
-<span class="sourceLineNo">087</span> // the procedure was added to the WAL. We can use this information to be able<a name="line.87"></a>
-<span class="sourceLineNo">088</span> // to start procedures before reaching the end of the WAL, or before reading all WALs.<a name="line.88"></a>
-<span class="sourceLineNo">089</span> // But in some cases, the WAL with that record can be already gone.<a name="line.89"></a>
-<span class="sourceLineNo">090</span> // As an alternative, we can use the stackIds on each procedure,<a name="line.90"></a>
-<span class="sourceLineNo">091</span> // to identify when a procedure is ready to start.<a name="line.91"></a>
-<span class="sourceLineNo">092</span> // If there are gaps in the sum of the stackIds we need to read more WALs.<a name="line.92"></a>
-<span class="sourceLineNo">093</span> //<a name="line.93"></a>
-<span class="sourceLineNo">094</span> // Example (all procs child of A):<a name="line.94"></a>
-<span class="sourceLineNo">095</span> // WAL-2: [A, B] A stackIds = [0, 4], B stackIds = [1, 5]<a name="line.95"></a>
-<span class="sourceLineNo">096</span> // WAL-1: [A, B, C, D]<a name="line.96"></a>
-<span class="sourceLineNo">097</span> //<a name="line.97"></a>
-<span class="sourceLineNo">098</span> // In the case above we need to read one more WAL to be able to consider<a name="line.98"></a>
-<span class="sourceLineNo">099</span> // the root procedure A and all children as ready.<a name="line.99"></a>
-<span class="sourceLineNo">100</span> // ==============================================================================================<a name="line.100"></a>
-<span class="sourceLineNo">101</span> private final WalProcedureMap localProcedureMap = new WalProcedureMap(1024);<a name="line.101"></a>
-<span class="sourceLineNo">102</span> private final WalProcedureMap procedureMap = new WalProcedureMap(1024);<a name="line.102"></a>
-<span class="sourceLineNo">103</span><a name="line.103"></a>
-<span class="sourceLineNo">104</span> private final ProcedureWALFormat.Loader loader;<a name="line.104"></a>
-<span class="sourceLineNo">105</span><a name="line.105"></a>
-<span class="sourceLineNo">106</span> /**<a name="line.106"></a>
-<span class="sourceLineNo">107</span> * Global tracker that will be used by the WALProcedureStore after load.<a name="line.107"></a>
-<span class="sourceLineNo">108</span> * If the last WAL was closed cleanly we already have a full tracker ready to be used.<a name="line.108"></a>
-<span class="sourceLineNo">109</span> * If the last WAL was truncated (e.g. master killed) the tracker will be empty<a name="line.109"></a>
-<span class="sourceLineNo">110</span> * and the 'partial' flag will be set. In this case, on WAL replay we are going<a name="line.110"></a>
-<span class="sourceLineNo">111</span> * to rebuild the tracker.<a name="line.111"></a>
-<span class="sourceLineNo">112</span> */<a name="line.112"></a>
-<span class="sourceLineNo">113</span> private final ProcedureStoreTracker tracker;<a name="line.113"></a>
-<span class="sourceLineNo">114</span> // TODO: private final boolean hasFastStartSupport;<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> * If tracker for a log file is partial (see {@link ProcedureStoreTracker#partial}), we<a name="line.117"></a>
-<span class="sourceLineNo">118</span> * re-build the list of procedures updated in that WAL because we need it for log cleaning<a name="line.118"></a>
-<span class="sourceLineNo">119</span> * purposes. If all procedures updated in a WAL are found to be obsolete, it can be safely deleted.<a name="line.119"></a>
-<span class="sourceLineNo">120</span> * (see {@link WALProcedureStore#removeInactiveLogs()}).<a name="line.120"></a>
-<span class="sourceLineNo">121</span> * However, we don't need deleted part of a WAL's tracker for this purpose, so we don't bother<a name="line.121"></a>
-<span class="sourceLineNo">122</span> * re-building it.<a name="line.122"></a>
-<span class="sourceLineNo">123</span> */<a name="line.123"></a>
-<span class="sourceLineNo">124</span> private ProcedureStoreTracker localTracker;<a name="line.124"></a>
-<span class="sourceLineNo">125</span><a name="line.125"></a>
-<span class="sourceLineNo">126</span> // private long compactionLogId;<a name="line.126"></a>
-<span class="sourceLineNo">127</span> private long maxProcId = 0;<a name="line.127"></a>
-<span class="sourceLineNo">128</span><a name="line.128"></a>
-<span class="sourceLineNo">129</span> public ProcedureWALFormatReader(final ProcedureStoreTracker tracker,<a name="line.129"></a>
-<span class="sourceLineNo">130</span> ProcedureWALFormat.Loader loader) {<a name="line.130"></a>
-<span class="sourceLineNo">131</span> this.tracker = tracker;<a name="line.131"></a>
-<span class="sourceLineNo">132</span> this.loader = loader;<a name="line.132"></a>
-<span class="sourceLineNo">133</span> // we support fast-start only if we have a clean shutdown.<a name="line.133"></a>
-<span class="sourceLineNo">134</span> // this.hasFastStartSupport = !tracker.isEmpty();<a name="line.134"></a>
-<span class="sourceLineNo">135</span> }<a name="line.135"></a>
-<span class="sourceLineNo">136</span><a name="line.136"></a>
-<span class="sourceLineNo">137</span> public void read(final ProcedureWALFile log) throws IOException {<a name="line.137"></a>
-<span class="sourceLineNo">138</span> localTracker = log.getTracker().isPartial() ? log.getTracker() : null;<a name="line.138"></a>
-<span class="sourceLineNo">139</span> if (localTracker != null) {<a name="line.139"></a>
-<span class="sourceLineNo">140</span> LOG.info("Rebuilding tracker for " + log);<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> FSDataInputStream stream = log.getStream();<a name="line.143"></a>
-<span class="sourceLineNo">144</span> try {<a name="line.144"></a>
-<span class="sourceLineNo">145</span> boolean hasMore = true;<a name="line.145"></a>
-<span class="sourceLineNo">146</span> while (hasMore) {<a name="line.146"></a>
-<span class="sourceLineNo">147</span> ProcedureWALEntry entry = ProcedureWALFormat.readEntry(stream);<a name="line.147"></a>
-<span class="sourceLineNo">148</span> if (entry == null) {<a name="line.148"></a>
-<span class="sourceLineNo">149</span> LOG.warn("Nothing left to decode. Exiting with missing EOF, log=" + log);<a name="line.149"></a>
-<span class="sourceLineNo">150</span> break;<a name="line.150"></a>
-<span class="sourceLineNo">151</span> }<a name="line.151"></a>
-<span class="sourceLineNo">152</span> switch (entry.getType()) {<a name="line.152"></a>
-<span class="sourceLineNo">153</span> case PROCEDURE_WAL_INIT:<a name="line.153"></a>
-<span class="sourceLineNo">154</span> readInitEntry(entry);<a name="line.154"></a>
-<span class="sourceLineNo">155</span> break;<a name="line.155"></a>
-<span class="sourceLineNo">156</span> case PROCEDURE_WAL_INSERT:<a name="line.156"></a>
-<span class="sourceLineNo">157</span> readInsertEntry(entry);<a name="line.157"></a>
-<span class="sourceLineNo">158</span> break;<a name="line.158"></a>
-<span class="sourceLineNo">159</span> case PROCEDURE_WAL_UPDATE:<a name="line.159"></a>
-<span class="sourceLineNo">160</span> case PROCEDURE_WAL_COMPACT:<a name="line.160"></a>
-<span class="sourceLineNo">161</span> readUpdateEntry(entry);<a name="line.161"></a>
-<span class="sourceLineNo">162</span> break;<a name="line.162"></a>
-<span class="sourceLineNo">163</span> case PROCEDURE_WAL_DELETE:<a name="line.163"></a>
-<span class="sourceLineNo">164</span> readDeleteEntry(entry);<a name="line.164"></a>
-<span class="sourceLineNo">165</span> break;<a name="line.165"></a>
-<span class="sourceLineNo">166</span> case PROCEDURE_WAL_EOF:<a name="line.166"></a>
-<span class="sourceLineNo">167</span> hasMore = false;<a name="line.167"></a>
-<span class="sourceLineNo">168</span> break;<a name="line.168"></a>
-<span class="sourceLineNo">169</span> default:<a name="line.169"></a>
-<span class="sourceLineNo">170</span> throw new CorruptedWALProcedureStoreException("Invalid entry: " + entry);<a name="line.170"></a>
-<span class="sourceLineNo">171</span> }<a name="line.171"></a>
-<span class="sourceLineNo">172</span> }<a name="line.172"></a>
-<span class="sourceLineNo">173</span> } catch (InvalidProtocolBufferException e) {<a name="line.173"></a>
-<span class="sourceLineNo">174</span> LOG.error("While reading procedure from " + log, e);<a name="line.174"></a>
-<span class="sourceLineNo">175</span> loader.markCorruptedWAL(log, e);<a name="line.175"></a>
-<span class="sourceLineNo">176</span> }<a name="line.176"></a>
-<span class="sourceLineNo">177</span><a name="line.177"></a>
-<span class="sourceLineNo">178</span> if (localTracker != null) {<a name="line.178"></a>
-<span class="sourceLineNo">179</span> localTracker.setPartialFlag(false);<a name="line.179"></a>
-<span class="sourceLineNo">180</span> }<a name="line.180"></a>
-<span class="sourceLineNo">181</span> if (!localProcedureMap.isEmpty()) {<a name="line.181"></a>
-<span class="sourceLineNo">182</span> log.setProcIds(localProcedureMap.getMinProcId(), localProcedureMap.getMaxProcId());<a name="line.182"></a>
-<span class="sourceLineNo">183</span> procedureMap.mergeTail(localProcedureMap);<a name="line.183"></a>
-<span class="sourceLineNo">184</span><a name="line.184"></a>
-<span class="sourceLineNo">185</span> //if (hasFastStartSupport) {<a name="line.185"></a>
-<span class="sourceLineNo">186</span> // TODO: Some procedure may be already runnables (see readInitEntry())<a name="line.186"></a>
-<span class="sourceLineNo">187</span> // (we can also check the "update map" in the log trackers)<a name="line.187"></a>
-<span class="sourceLineNo">188</span> // --------------------------------------------------<a name="line.188"></a>
-<span class="sourceLineNo">189</span> //EntryIterator iter = procedureMap.fetchReady();<a name="line.189"></a>
-<span class="sourceLineNo">190</span> //if (iter != null) loader.load(iter);<a name="line.190"></a>
-<span class="sourceLineNo">191</span> // --------------------------------------------------<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><a name="line.195"></a>
-<span class="sourceLineNo">196</span> public void finish() throws IOException {<a name="line.196"></a>
-<span class="sourceLineNo">197</span> // notify the loader about the max proc ID<a name="line.197"></a>
-<span class="sourceLineNo">198</span> loader.setMaxProcId(maxProcId);<a name="line.198"></a>
-<span class="sourceLineNo">199</span><a name="line.199"></a>
-<span class="sourceLineNo">200</span> // fetch the procedure ready to run.<a name="line.200"></a>
-<span class="sourceLineNo">201</span> ProcedureIterator procIter = procedureMap.fetchReady();<a name="line.201"></a>
-<span class="sourceLineNo">202</span> if (procIter != null) loader.load(procIter);<a name="line.202"></a>
-<span class="sourceLineNo">203</span><a name="line.203"></a>
-<span class="sourceLineNo">204</span> // remaining procedures have missing link or dependencies<a name="line.204"></a>
-<span class="sourceLineNo">205</span> // consider them as corrupted, manual fix is probably required.<a name="line.205"></a>
-<span class="sourceLineNo">206</span> procIter = procedureMap.fetchAll();<a name="line.206"></a>
-<span class="sourceLineNo">207</span> if (procIter != null) loader.handleCorrupted(procIter);<a name="line.207"></a>
-<span class="sourceLineNo">208</span> }<a name="line.208"></a>
-<span class="sourceLineNo">209</span><a name="line.209"></a>
-<span class="sourceLineNo">210</span> private void loadProcedure(final ProcedureWALEntry entry, final ProcedureProtos.Procedure proc) {<a name="line.210"></a>
-<span class="sourceLineNo">211</span> maxProcId = Math.max(maxProcId, proc.getProcId());<a name="line.211"></a>
-<span class="sourceLineNo">212</span> if (isRequired(proc.getProcId())) {<a name="line.212"></a>
-<span class="sourceLineNo">213</span> if (LOG.isTraceEnabled()) {<a name="line.213"></a>
-<span class="sourceLineNo">214</span> LOG.trace("Read " + entry.getType() + " entry " + proc.getProcId());<a name="line.214"></a>
-<span class="sourceLineNo">215</span> }<a name="line.215"></a>
-<span class="sourceLineNo">216</span> localProcedureMap.add(proc);<a name="line.216"></a>
-<span class="sourceLineNo">217</span> if (tracker.isPartial()) {<a name="line.217"></a>
-<span class="sourceLineNo">218</span> tracker.insert(proc.getProcId());<a name="line.218"></a>
-<span class="sourceLineNo">219</span> }<a name="line.219"></a>
-<span class="sourceLineNo">220</span> }<a name="line.220"></a>
-<span class="sourceLineNo">221</span> if (localTracker != null) {<a name="line.221"></a>
-<span class="sourceLineNo">222</span> localTracker.insert(proc.getProcId());<a name="line.222"></a>
-<span class="sourceLineNo">223</span> }<a name="line.223"></a>
-<span class="sourceLineNo">224</span> }<a name="line.224"></a>
-<span class="sourceLineNo">225</span><a name="line.225"></a>
-<span class="sourceLineNo">226</span> private void readInitEntry(final ProcedureWALEntry entry)<a name="line.226"></a>
-<span class="sourceLineNo">227</span> throws IOException {<a name="line.227"></a>
-<span class="sourceLineNo">228</span> assert entry.getProcedureCount() == 1 : "Expected only one procedure";<a name="line.228"></a>
-<span class="sourceLineNo">229</span> loadProcedure(entry, entry.getProcedure(0));<a name="line.229"></a>
-<span class="sourceLineNo">230</span> }<a name="line.230"></a>
-<span class="sourceLineNo">231</span><a name="line.231"></a>
-<span class="sourceLineNo">232</span> private void readInsertEntry(final ProcedureWALEntry entry) throws IOException {<a name="line.232"></a>
-<span class="sourceLineNo">233</span> assert entry.getProcedureCount() >= 1 : "Expected one or more procedures";<a name="line.233"></a>
-<span class="sourceLineNo">234</span> loadProcedure(entry, entry.getProcedure(0));<a name="line.234"></a>
-<span class="sourceLineNo">235</span> for (int i = 1; i < entry.getProcedureCount(); ++i) {<a name="line.235"></a>
-<span class="sourceLineNo">236</span> loadProcedure(entry, entry.getProcedure(i));<a name="line.236"></a>
-<span class="sourceLineNo">237</span> }<a name="line.237"></a>
-<span class="sourceLineNo">238</span> }<a name="line.238"></a>
-<span class="sourceLineNo">239</span><a name="line.239"></a>
-<span class="sourceLineNo">240</span> private void readUpdateEntry(final ProcedureWALEntry entry) throws IOException {<a name="line.240"></a>
-<span class="sourceLineNo">241</span> assert entry.getProcedureCount() == 1 : "Expected only one procedure";<a name="line.241"></a>
-<span class="sourceLineNo">242</span> loadProcedure(entry, entry.getProcedure(0));<a name="line.242"></a>
-<span class="sourceLineNo">243</span> }<a name="line.243"></a>
-<span class="sourceLineNo">244</span><a name="line.244"></a>
-<span class="sourceLineNo">245</span> private void readDeleteEntry(final ProcedureWALEntry entry) throws IOException {<a name="line.245"></a>
-<span class="sourceLineNo">246</span> assert entry.hasProcId() : "expected ProcID";<a name="line.246"></a>
-<span class="sourceLineNo">247</span><a name="line.247"></a>
-<span class="sourceLineNo">248</span> if (entry.getChildIdCount() > 0) {<a name="line.248"></a>
-<span class="sourceLineNo">249</span> assert entry.getProcedureCount() == 1 : "Expected only one procedure";<a name="line.249"></a>
-<span class="sourceLineNo">250</span><a name="line.250"></a>
-<span class="sourceLineNo">251</span> // update the parent procedure<a name="line.251"></a>
-<span class="sourceLineNo">252</span> loadProcedure(entry, entry.getProcedure(0));<a name="line.252"></a>
-<span class="sourceLineNo">253</span><a name="line.253"></a>
-<span class="sourceLineNo">254</span> // remove the child procedures of entry.getProcId()<a name="line.254"></a>
-<span class="sourceLineNo">255</span> for (int i = 0, count = entry.getChildIdCount(); i < count; ++i) {<a name="line.255"></a>
-<span class="sourceLineNo">256</span> deleteEntry(entry.getChildId(i));<a name="line.256"></a>
-<span class="sourceLineNo">257</span> }<a name="line.257"></a>
-<span class="sourceLineNo">258</span> } else {<a name="line.258"></a>
-<span class="sourceLineNo">259</span> assert entry.getProcedureCount() == 0 : "Expected no procedures";<a name="line.259"></a>
-<span class="sourceLineNo">260</span><a name="line.260"></a>
-<span class="sourceLineNo">261</span> // delete the procedure<a name="line.261"></a>
-<span class="sourceLineNo">262</span> deleteEntry(entry.getProcId());<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><a name="line.265"></a>
-<span class="sourceLineNo">266</span> private void deleteEntry(final long procId) {<a name="line.266"></a>
-<span class="sourceLineNo">267</span> if (LOG.isTraceEnabled()) {<a name="line.267"></a>
-<span class="sourceLineNo">268</span> LOG.trace("delete entry " + procId);<a name="line.268"></a>
-<span class="sourceLineNo">269</span> }<a name="line.269"></a>
-<span class="sourceLineNo">270</span> maxProcId = Math.max(maxProcId, procId);<a name="line.270"></a>
-<span class="sourceLineNo">271</span> localProcedureMap.remove(procId);<a name="line.271"></a>
-<span class="sourceLineNo">272</span> assert !procedureMap.contains(procId);<a name="line.272"></a>
-<span class="sourceLineNo">273</span> if (tracker.isPartial()) {<a name="line.273"></a>
-<span class="sourceLineNo">274</span> tracker.setDeleted(procId, true);<a name="line.274"></a>
-<span class="sourceLineNo">275</span> }<a name="line.275"></a>
-<span class="sourceLineNo">276</span> if (localTracker != null) {<a name="line.276"></a>
-<span class="sourceLineNo">277</span> // In case there is only delete entry for this procedure in current log.<a name="line.277"></a>
-<span class="sourceLineNo">278</span> localTracker.setDeleted(procId, true);<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> private boolean isDeleted(final long procId) {<a name="line.282"></a>
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-<span class="sourceLineNo">284</span> }<a name="line.284"></a>
-<span class="sourceLineNo">285</span><a name="line.285"></a>
-<span class="sourceLineNo">286</span> private boolean isRequired(final long procId) {<a name="line.286"></a>
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-<span class="sourceLineNo">289</span><a name="line.289"></a>
-<span class="sourceLineNo">290</span> // ==========================================================================<a name="line.290"></a>
-<span class="sourceLineNo">291</span> // We keep an in-memory map of the procedures sorted by replay order.<a name="line.291"></a>
-<span class="sourceLineNo">292</span> // (see the details in the beginning of the file)<a name="line.292"></a>
-<span class="sourceLineNo">293</span> // _______________________________________________<a name="line.293"></a>
-<span class="sourceLineNo">294</span> // procedureMap = | A | | E | | C | | | | | G | | |<a name="line.294"></a>
-<span class="sourceLineNo">295</span> // D B<a name="line.295"></a>
-<span class="sourceLineNo">296</span> // replayOrderHead = C <-> B <-> E <-> D <-> A <-> G<a name="line.296"></a>
-<span class="sourceLineNo">297</span> //<a name="line.297"></a>
-<span class="sourceLineNo">298</span> // We also have a lazy grouping by "root procedure", and a list of<a name="line.298"></a>
-<span class="sourceLineNo">299</span> // unlinked procedures. If after reading all the WALs we have unlinked<a name="line.299"></a>
-<span class="sourceLineNo">300</span> // procedures it means that we had a missing WAL or a corruption.<a name="line.300"></a>
-<span class="sourceLineNo">301</span> // rootHead = A <-> D <-> G<a name="line.301"></a>
-<span class="sourceLineNo">302</span> // B E<a name="line.302"></a>
-<span class="sourceLineNo">303</span> // C<a name="line.303"></a>
-<span class="sourceLineNo">304</span> // unlinkFromLinkList = None<a name="line.304"></a>
-<span class="sourceLineNo">305</span> // ==========================================================================<a name="line.305"></a>
-<span class="sourceLineNo">306</span> private static class Entry {<a name="line.306"></a>
-<span class="sourceLineNo">307</span> // For bucketed linked lists in hash-table.<a name="line.307"></a>
-<span class="sourceLineNo">308</span> protected Entry hashNext;<a name="line.308"></a>
-<span class="sourceLineNo">309</span> // child head<a name="line.309"></a>
-<span class="sourceLineNo">310</span> protected Entry childHead;<a name="line.310"></a>
-<span class="sourceLineNo">311</span> // double-link for rootHead or childHead<a name="line.311"></a>
-<span class="sourceLineNo">312</span> protected Entry linkNext;<a name="line.312"></a>
-<span class="sourceLineNo">313</span> protected Entry linkPrev;<a name="line.313"></a>
-<span class="sourceLineNo">314</span> // replay double-linked-list<a name="line.314"></a>
-<span class="sourceLineNo">315</span> protected Entry replayNext;<a name="line.315"></a>
-<span class="sourceLineNo">316</span> protected Entry replayPrev;<a name="line.316"></a>
-<span class="sourceLineNo">317</span> // procedure-infos<a name="line.317"></a>
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-<span class="sourceLineNo">322</span> public Entry(Entry hashNext) { this.hashNext = hashNext; }<a name="line.322"></a>
-<span class="sourceLineNo">323</span><a name="line.323"></a>
-<span class="sourceLineNo">324</span> public long getProcId() { return proto.getProcId(); }<a name="line.324"></a>
-<span class="sourceLineNo">325</span> public long getParentId() { return proto.getParentId(); }<a name="line.325"></a>
-<span class="sourceLineNo">326</span> public boolean hasParent() { return proto.hasParentId(); }<a name="line.326"></a>
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-<span class="sourceLineNo">328</span><a name="line.328"></a>
-<span class="sourceLineNo">329</span> public boolean isFinished() {<a name="line.329"></a>
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-<span class="sourceLineNo">332</span> // means when everything up to the 'root' is finished.<a name="line.332"></a>
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-<span class="sourceLineNo">334</span> case ROLLEDBACK:<a name="line.334"></a>
-<span class="sourceLineNo">335</span> case SUCCESS:<a name="line.335"></a>
-<span class="sourceLineNo">336</span> return true;<a name="line.336"></a>
-<span class="sourceLineNo">337</span> default:<a name="line.337"></a>
-<span class="sourceLineNo">338</span> break;<a name="line.338"></a>
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-<span class="sourceLineNo">340</span> }<a name="line.340"></a>
-<span class="sourceLineNo">341</span> return false;<a name="line.341"></a>
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-<span class="sourceLineNo">343</span><a name="line.343"></a>
-<span class="sourceLineNo">344</span> public Procedure convert() throws IOException {<a name="line.344"></a>
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-<span class="sourceLineNo">346</span> procedure = ProcedureUtil.convertToProcedure(proto);<a name="line.346"></a>
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-<span class="sourceLineNo">348</span> return procedure;<a name="line.348"></a>
-<span class="sourceLineNo">349</span> }<a name="line.349"></a>
-<span class="sourceLineNo">350</span><a name="line.350"></a>
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-<span class="sourceLineNo">354</span><a name="line.354"></a>
-<span class="sourceLineNo">355</span> @Override<a name="line.355"></a>
-<span class="sourceLineNo">356</span> public String toString() {<a name="line.356"></a>
-<span class="sourceLineNo">357</span> final StringBuilder sb = new StringBuilder();<a name="line.357"></a>
-<span class="sourceLineNo">358</span> sb.append("Entry(");<a name="line.358"></a>
-<span class="sourceLineNo">359</span> sb.append(getProcId());<a name="line.359"></a>
-<span class="sourceLineNo">360</span> sb.append(", parentId=");<a name="line.360"></a>
-<span class="sourceLineNo">361</span> sb.append(getParentId());<a name="line.361"></a>
-<span class="sourceLineNo">362</span> sb.append(", class=");<a name="line.362"></a>
-<span class="sourceLineNo">363</span> sb.append(proto.getClassName());<a name="line.363"></a>
-<span class="sourceLineNo">364</span> sb.append(")");<a name="line.364"></a>
-<span class="sourceLineNo">365</span> return sb.toString();<a name="line.365"></a>
-<span class="sourceLineNo">366</span> }<a name="line.366"></a>
-<span class="sourceLineNo">367</span> }<a name="line.367"></a>
+<span class="sourceLineNo">056</span> // same procedure, that will be the "latest" update (Caveat: with multiple threads writing<a name="line.56"></a>
+<span class="sourceLineNo">057</span> // the store, this assumption does not hold).<a name="line.57"></a>
+<span class="sourceLineNo">058</span> //<a name="line.58"></a>
+<span class="sourceLineNo">059</span> // We keep two in-memory maps:<a name="line.59"></a>
+<span class="sourceLineNo">060</span> // - localProcedureMap: is the map containing the entries in the WAL we are processing<a name="line.60"></a>
+<span class="sourceLineNo">061</span> // - procedureMap: is the map containing all the procedures we found up to the WAL in process.<a name="line.61"></a>
+<span class="sourceLineNo">062</span> // localProcedureMap is merged with the procedureMap once we reach the WAL EOF.<a name="line.62"></a>
+<span class="sourceLineNo">063</span> //<a name="line.63"></a>
+<span class="sourceLineNo">064</span> // Since we are reading the WALs in reverse order (newest to oldest),<a name="line.64"></a>
+<span class="sourceLineNo">065</span> // if we find an entry related to a procedure we already have in 'procedureMap' we can discard it.<a name="line.65"></a>
+<span class="sourceLineNo">066</span> //<a name="line.66"></a>
+<span class="sourceLineNo">067</span> // The WAL is append-only so the last procedure in the WAL is the one that<a name="line.67"></a>
+<span class="sourceLineNo">068</span> // was in execution at the time we crashed/closed the server.<a name="line.68"></a>
+<span class="sourceLineNo">069</span> // Given that, the procedure replay order can be inferred by the WAL order.<a name="line.69"></a>
+<span class="sourceLineNo">070</span> //<a name="line.70"></a>
+<span class="sourceLineNo">071</span> // Example:<a name="line.71"></a>
+<span class="sourceLineNo">072</span> // WAL-2: [A, B, A, C, D]<a name="line.72"></a>
+<span class="sourceLineNo">073</span> // WAL-1: [F, G, A, F, B]<a name="line.73"></a>
+<span class="sourceLineNo">074</span> // Replay-Order: [D, C, A, B, F, G]<a name="line.74"></a>
+<span class="sourceLineNo">075</span> //<a name="line.75"></a>
+<span class="sourceLineNo">076</span> // The "localProcedureMap" keeps a "replayOrder" list. Every time we add the<a name="line.76"></a>
+<span class="sourceLineNo">077</span> // record to the map that record is moved to the head of the "replayOrder" list.<a name="line.77"></a>
+<span class="sourceLineNo">078</span> // Using the example above:<a name="line.78"></a>
+<span class="sourceLineNo">079</span> // WAL-2 localProcedureMap.replayOrder is [D, C, A, B]<a name="line.79"></a>
+<span class="sourceLineNo">080</span> // WAL-1 localProcedureMap.replayOrder is [F, G]<a name="line.80"></a>
+<span class="sourceLineNo">081</span> //<a name="line.81"></a>
+<span class="sourceLineNo">082</span> // Each time we reach the WAL-EOF, the "replayOrder" list is merged/appended in 'procedureMap'<a name="line.82"></a>
+<span class="sourceLineNo">083</span> // so using the example above we end up with: [D, C, A, B] + [F, G] as replay order.<a name="line.83"></a>
+<span class="sourceLineNo">084</span> //<a name="line.84"></a>
+<span class="sourceLineNo">085</span> // Fast Start: INIT/INSERT record and StackIDs<a name="line.85"></a>
+<span class="sourceLineNo">086</span> // ---------------------------------------------<a name="line.86"></a>
+<span class="sourceLineNo">087</span> // We have two special records, INIT and INSERT, that track the first time<a name="line.87"></a>
+<span class="sourceLineNo">088</span> // the procedure was added to the WAL. We can use this information to be able<a name="line.88"></a>
+<span class="sourceLineNo">089</span> // to start procedures before reaching the end of the WAL, or before reading all WALs.<a name="line.89"></a>
+<span class="sourceLineNo">090</span> // But in some cases, the WAL with that record can be already gone.<a name="line.90"></a>
+<span class="sourceLineNo">091</span> // As an alternative, we can use the stackIds on each procedure,<a name="line.91"></a>
+<span class="sourceLineNo">092</span> // to identify when a procedure is ready to start.<a name="line.92"></a>
+<span class="sourceLineNo">093</span> // If there are gaps in the sum of the stackIds we need to read more WALs.<a name="line.93"></a>
+<span class="sourceLineNo">094</span> //<a name="line.94"></a>
+<span class="sourceLineNo">095</span> // Example (all procs child of A):<a name="line.95"></a>
+<span class="sourceLineNo">096</span> // WAL-2: [A, B] A stackIds = [0, 4], B stackIds = [1, 5]<a name="line.96"></a>
+<span class="sourceLineNo">097</span> // WAL-1: [A, B, C, D]<a name="line.97"></a>
+<span class="sourceLineNo">098</span> //<a name="line.98"></a>
+<span class="sourceLineNo">099</span> // In the case above we need to read one more WAL to be able to consider<a name="line.99"></a>
+<span class="sourceLineNo">100</span> // the root procedure A and all children as ready.<a name="line.100"></a>
+<span class="sourceLineNo">101</span> // ==============================================================================================<a name="line.101"></a>
+<span class="sourceLineNo">102</span> private final WalProcedureMap localProcedureMap = new WalProcedureMap(1024);<a name="line.102"></a>
+<span class="sourceLineNo">103</span> private final WalProcedureMap procedureMap = new WalProcedureMap(1024);<a name="line.103"></a>
+<span class="sourceLineNo">104</span><a name="line.104"></a>
+<span class="sourceLineNo">105</span> private final ProcedureWALFormat.Loader loader;<a name="line.105"></a>
+<span class="sourceLineNo">106</span><a name="line.106"></a>
+<span class="sourceLineNo">107</span> /**<a name="line.107"></a>
+<span class="sourceLineNo">108</span> * Global tracker that will be used by the WALProcedureStore after load.<a name="line.108"></a>
+<span class="sourceLineNo">109</span> * If the last WAL was closed cleanly we already have a full tracker ready to be used.<a name="line.109"></a>
+<span class="sourceLineNo">110</span> * If the last WAL was truncated (e.g. master killed) the tracker will be empty<a name="line.110"></a>
+<span class="sourceLineNo">111</span> * and the 'partial' flag will be set. In this case, on WAL replay we are going<a name="line.111"></a>
+<span class="sourceLineNo">112</span> * to rebuild the tracker.<a name="line.112"></a>
+<span class="sourceLineNo">113</span> */<a name="line.113"></a>
+<span class="sourceLineNo">114</span> private final ProcedureStoreTracker tracker;<a name="line.114"></a>
+<span class="sourceLineNo">115</span> // TODO: private final boolean hasFastStartSupport;<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> * If tracker for a log file is partial (see {@link ProcedureStoreTracker#partial}), we<a name="line.118"></a>
+<span class="sourceLineNo">119</span> * re-build the list of procedures updated in that WAL because we need it for log cleaning<a name="line.119"></a>
+<span class="sourceLineNo">120</span> * purposes. If all procedures updated in a WAL are found to be obsolete, it can be safely deleted.<a name="line.120"></a>
+<span class="sourceLineNo">121</span> * (see {@link WALProcedureStore#removeInactiveLogs()}).<a name="line.121"></a>
+<span class="sourceLineNo">122</span> * However, we don't need deleted part of a WAL's tracker for this purpose, so we don't bother<a name="line.122"></a>
+<span class="sourceLineNo">123</span> * re-building it.<a name="line.123"></a>
+<span class="sourceLineNo">124</span> */<a name="line.124"></a>
+<span class="sourceLineNo">125</span> private ProcedureStoreTracker localTracker;<a name="line.125"></a>
+<span class="sourceLineNo">126</span><a name="line.126"></a>
+<span class="sourceLineNo">127</span> // private long compactionLogId;<a name="line.127"></a>
+<span class="sourceLineNo">128</span> private long maxProcId = 0;<a name="line.128"></a>
+<span class="sourceLineNo">129</span><a name="line.129"></a>
+<span class="sourceLineNo">130</span> public ProcedureWALFormatReader(final ProcedureStoreTracker tracker,<a name="line.130"></a>
+<span class="sourceLineNo">131</span> ProcedureWALFormat.Loader loader) {<a name="line.131"></a>
+<span class="sourceLineNo">132</span> this.tracker = tracker;<a name="line.132"></a>
+<span class="sourceLineNo">133</span> this.loader = loader;<a name="line.133"></a>
+<span class="sourceLineNo">134</span> // we support fast-start only if we have a clean shutdown.<a name="line.134"></a>
+<span class="sourceLineNo">135</span> // this.hasFastStartSupport = !tracker.isEmpty();<a name="line.135"></a>
+<span class="sourceLineNo">136</span> }<a name="line.136"></a>
+<span class="sourceLineNo">137</span><a name="line.137"></a>
+<span class="sourceLineNo">138</span> public void read(final ProcedureWALFile log) throws IOException {<a name="line.138"></a>
+<span class="sourceLineNo">139</span> localTracker = log.getTracker().isPartial() ? log.getTracker() : null;<a name="line.139"></a>
+<span class="sourceLineNo">140</span> if (localTracker != null) {<a name="line.140"></a>
+<span class="sourceLineNo">141</span> LOG.info("Rebuilding tracker for " + log);<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> FSDataInputStream stream = log.getStream();<a name="line.144"></a>
+<span class="sourceLineNo">145</span> try {<a name="line.145"></a>
+<span class="sourceLineNo">146</span> boolean hasMore = true;<a name="line.146"></a>
+<span class="sourceLineNo">147</span> while (hasMore) {<a name="line.147"></a>
+<span class="sourceLineNo">148</span> ProcedureWALEntry entry = ProcedureWALFormat.readEntry(stream);<a name="line.148"></a>
+<span class="sourceLineNo">149</span> if (entry == null) {<a name="line.149"></a>
+<span class="sourceLineNo">150</span> LOG.warn("Nothing left to decode. Exiting with missing EOF, log=" + log);<a name="line.150"></a>
+<span class="sourceLineNo">151</span> break;<a name="line.151"></a>
+<span class="sourceLineNo">152</span> }<a name="line.152"></a>
+<span class="sourceLineNo">153</span> switch (entry.getType()) {<a name="line.153"></a>
+<span class="sourceLineNo">154</span> case PROCEDURE_WAL_INIT:<a name="line.154"></a>
+<span class="sourceLineNo">155</span> readInitEntry(entry);<a name="line.155"></a>
+<span class="sourceLineNo">156</span> break;<a name="line.156"></a>
+<span class="sourceLineNo">157</span> case PROCEDURE_WAL_INSERT:<a name="line.157"></a>
+<span class="sourceLineNo">158</span> readInsertEntry(entry);<a name="line.158"></a>
+<span class="sourceLineNo">159</span> break;<a name="line.159"></a>
+<span class="sourceLineNo">160</span> case PROCEDURE_WAL_UPDATE:<a name="line.160"></a>
+<span class="sourceLineNo">161</span> case PROCEDURE_WAL_COMPACT:<a name="line.161"></a>
+<span class="sourceLineNo">162</span> readUpdateEntry(entry);<a name="line.162"></a>
+<span class="sourceLineNo">163</span> break;<a name="line.163"></a>
+<span class="sourceLineNo">164</span> case PROCEDURE_WAL_DELETE:<a name="line.164"></a>
+<span class="sourceLineNo">165</span> readDeleteEntry(entry);<a name="line.165"></a>
+<span class="sourceLineNo">166</span> break;<a name="line.166"></a>
+<span class="sourceLineNo">167</span> case PROCEDURE_WAL_EOF:<a name="line.167"></a>
+<span class="sourceLineNo">168</span> hasMore = false;<a name="line.168"></a>
+<span class="sourceLineNo">169</span> break;<a name="line.169"></a>
+<span class="sourceLineNo">170</span> default:<a name="line.170"></a>
+<span class="sourceLineNo">171</span> throw new CorruptedWALProcedureStoreException("Invalid entry: " + entry);<a name="line.171"></a>
+<span class="sourceLineNo">172</span> }<a name="line.172"></a>
+<span class="sourceLineNo">173</span> }<a name="line.173"></a>
+<span class="sourceLineNo">174</span> } catch (InvalidProtocolBufferException e) {<a name="line.174"></a>
+<span class="sourceLineNo">175</span> LOG.error("While reading procedure from " + log, e);<a name="line.175"></a>
+<span class="sourceLineNo">176</span> loader.markCorruptedWAL(log, e);<a name="line.176"></a>
+<span class="sourceLineNo">177</span> }<a name="line.177"></a>
+<span class="sourceLineNo">178</span><a name="line.178"></a>
+<span class="sourceLineNo">179</span> if (localTracker != null) {<a name="line.179"></a>
+<span class="sourceLineNo">180</span> localTracker.setPartialFlag(false);<a name="line.180"></a>
+<span class="sourceLineNo">181</span> }<a name="line.181"></a>
+<span class="sourceLineNo">182</span> if (!localProcedureMap.isEmpty()) {<a name="line.182"></a>
+<span class="sourceLineNo">183</span> log.setProcIds(localProcedureMap.getMinProcId(), localProcedureMap.getMaxProcId());<a name="line.183"></a>
+<span class="sourceLineNo">184</span> procedureMap.mergeTail(localProcedureMap);<a name="line.184"></a>
+<span class="sourceLineNo">185</span><a name="line.185"></a>
+<span class="sourceLineNo">186</span> //if (hasFastStartSupport) {<a name="line.186"></a>
+<span class="sourceLineNo">187</span> // TODO: Some procedure may be already runnables (see readInitEntry())<a name="line.187"></a>
+<span class="sourceLineNo">188</span> // (we can also check the "update map" in the log trackers)<a name="line.188"></a>
+<span class="sourceLineNo">189</span> // --------------------------------------------------<a name="line.189"></a>
+<span class="sourceLineNo">190</span> //EntryIterator iter = procedureMap.fetchReady();<a name="line.190"></a>
+<span class="sourceLineNo">191</span> //if (iter != null) loader.load(iter);<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> }<a name="line.195"></a>
+<span class="sourceLineNo">196</span><a name="line.196"></a>
+<span class="sourceLineNo">197</span> public void finish() throws IOException {<a name="line.197"></a>
+<span class="sourceLineNo">198</span> // notify the loader about the max proc ID<a name="line.198"></a>
+<span class="sourceLineNo">199</span> loader.setMaxProcId(maxProcId);<a name="line.199"></a>
+<span class="sourceLineNo">200</span><a name="line.200"></a>
+<span class="sourceLineNo">201</span> // fetch the procedure ready to run.<a name="line.201"></a>
+<span class="sourceLineNo">202</span> ProcedureIterator procIter = procedureMap.fetchReady();<a name="line.202"></a>
+<span class="sourceLineNo">203</span> if (procIter != null) loader.load(procIter);<a name="line.203"></a>
+<span class="sourceLineNo">204</span><a name="line.204"></a>
+<span class="sourceLineNo">205</span> // remaining procedures have missing link or dependencies<a name="line.205"></a>
+<span class="sourceLineNo">206</span> // consider them as corrupted, manual fix is probably required.<a name="line.206"></a>
+<span class="sourceLineNo">207</span> procIter = procedureMap.fetchAll();<a name="line.207"></a>
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+<span class="sourceLineNo">210</span><a name="line.210"></a>
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+<span class="sourceLineNo">212</span> maxProcId = Math.max(maxProcId, proc.getProcId());<a name="line.212"></a>
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+<span class="sourceLineNo">216</span> }<a name="line.216"></a>
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+<span class="sourceLineNo">224</span> }<a name="line.224"></a>
+<span class="sourceLineNo">225</span> }<a name="line.225"></a>
+<span class="sourceLineNo">226</span><a name="line.226"></a>
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+<span class="sourceLineNo">228</span> throws IOException {<a name="line.228"></a>
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+<span class="sourceLineNo">230</span> loadProcedure(entry, entry.getProcedure(0));<a name="line.230"></a>
+<span class="sourceLineNo">231</span> }<a name="line.231"></a>
+<span class="sourceLineNo">232</span><a name="line.232"></a>
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+<span class="sourceLineNo">235</span> loadProcedure(entry, entry.getProcedure(0));<a name="line.235"></a>
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+<span class="sourceLineNo">239</span> }<a name="line.239"></a>
+<span class="sourceLineNo">240</span><a name="line.240"></a>
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+<span class="sourceLineNo">242</span> assert entry.getProcedureCount() == 1 : "Expected only one procedure";<a name="line.242"></a>
+<span class="sourceLineNo">243</span> loadProcedure(entry, entry.getProcedure(0));<a name="line.243"></a>
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+<span class="sourceLineNo">245</span><a name="line.245"></a>
+<span class="sourceLineNo">246</span> private void readDeleteEntry(final ProcedureWALEntry entry) throws IOException {<a name="line.246"></a>
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+<span class="sourceLineNo">248</span><a name="line.248"></a>
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+<span class="sourceLineNo">252</span> // update the parent procedure<a name="line.252"></a>
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+<span class="sourceLineNo">261</span><a name="line.261"></a>
+<span class="sourceLineNo">262</span> // delete the procedure<a name="line.262"></a>
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+<span class="sourceLineNo">265</span> }<a name="line.265"></a>
+<span class="sourceLineNo">266</span><a name="line.266"></a>
+<span class="sourceLineNo">267</span> private void deleteEntry(final long procId) {<a name="line.267"></a>
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+<span class="sourceLineNo">281</span> }<a name="line.281"></a>
+<span class="sourceLineNo">282</span><a name="line.282"></a>
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+<span class="sourceLineNo">285</span> }<a name="line.285"></a>
+<span class="sourceLineNo">286</span><a name="line.286"></a>
+<span class="sourceLineNo">287</span> private boolean isRequired(final long procId) {<a name="line.287"></a>
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+<span class="sourceLineNo">290</span><a name="line.290"></a>
+<span class="sourceLineNo">291</span> // ==========================================================================<a name="line.291"></a>
+<span class="sourceLineNo">292</span> // We keep an in-memory map of the procedures sorted by replay order.<a name="line.292"></a>
+<span class="sourceLineNo">293</span> // (see the details in the beginning of the file)<a name="line.293"></a>
+<span class="sourceLineNo">294</span> // _______________________________________________<a name="line.294"></a>
+<span class="sourceLineNo">295</span> // procedureMap = | A | | E | | C | | | | | G | | |<a name="line.295"></a>
+<span class="sourceLineNo">296</span> // D B<a name="line.296"></a>
+<span class="sourceLineNo">297</span> // replayOrderHead = C <-> B <-> E <-> D <-> A <-> G<a name="line.297"></a>
+<span class="sourceLineNo">298</span> //<a name="line.298"></a>
+<span class="sourceLineNo">299</span> // We also have a lazy grouping by "root procedure", and a list of<a name="line.299"></a>
+<span class="sourceLineNo">300</span> // unlinked procedures. If after reading all the WALs we have unlinked<a name="line.300"></a>
+<span class="sourceLineNo">301</span> // procedures it means that we had a missing WAL or a corruption.<a name="line.301"></a>
+<span class="sourceLineNo">302</span> // rootHead = A <-> D <-> G<a name="line.302"></a>
+<span class="sourceLineNo">303</span> // B E<a name="line.303"></a>
+<span class="sourceLineNo">304</span> // C<a name="line.304"></a>
+<span class="sourceLineNo">305</span> // unlinkFromLinkList = None<a name="line.305"></a>
+<span class="sourceLineNo">306</span> // ==========================================================================<a name="line.306"></a>
+<span class="sourceLineNo">307</span> private static class Entry {<a name="line.307"></a>
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+<span class="sourceLineNo">309</span> protected Entry hashNext;<a name="line.309"></a>
+<span class="sourceLineNo">310</span> // child head<a name="line.310"></a>
+<span class="sourceLineNo">311</span> protected Entry childHead;<a name="line.311"></a>
+<span class="sourceLineNo">312</span> // double-link for rootHead or childHead<a name="line.312"></a>
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+<span class="sourceLineNo">314</span> protected Entry linkPrev;<a name="line.314"></a>
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+<span class="sourceLineNo">317</span> protected Entry replayPrev;<a name="line.317"></a>
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+<span class="sourceLineNo">326</span><a name="line.326"></a>
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+<span class="sourceLineNo">330</span><a name="line.330"></a>
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+<span class="sourceLineNo">334</span><a name="line.334"></a>
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+<span class="sourceLineNo">338</span><a name="line.338"></a>
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+<span class="sourceLineNo">342</span><a name="line.342"></a>
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+<span class="sourceLineNo">362</span> return procedure;<a name="line.362"></a>
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+<span class="sourceLineNo">364</span><a name="line.364"></a>
+<span class="sourceLineNo">365</span> public ProcedureInfo convertToInfo() {<a name="line.365"></a>
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+<span class="sourceLineNo">370</span> public String toString() {<a name="line.370"></a>
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+<span class="sourceLineNo">373</span> sb.append(getProcId());<a name="line.373"></a>
+<span class="sourceLineNo">374</span> sb.append(", parentId=");<a name="line.374"></a>
+<span class="sourceLineNo">375</span> sb.append(getParentId());<a name="line.375"></a>
+<span class="sourceLineNo">376</span> sb.append(", class=");<a name="line.376"></a>
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+<span class="sourceLineNo">378</span> sb.append(")");<a name="line.378"></a>
+<span class="sourceLineNo">379</span> return sb.toString();<a name="line.379"></a>
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+<span class="sourceLineNo">381</span> }<a name="line.381"></a>
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-<span class="sourceLineNo">388</span> @Override<a name="line.388"></a>
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+<span class="sourceLineNo">383</span> private static class EntryIterator implements ProcedureIterator {<a name="line.383"></a>
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+<span class="sourceLineNo">385</span> private Entry current;<a name="line.385"></a>
+<span class="sourceLineNo">386</span><a name="line.386"></a>
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+<span class="sourceLineNo">391</span><a name="line.391"></a>
+<span class="sourceLineNo">392</span> @Override<a name="line.392"></a>
+<span class="sourceLineNo">393</span> public void reset() {<a name="line.393"></a>
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+<span class="sourceLineNo">396</span><a name="line.396"></a>
+<span class="sourceLineNo">397</span> @Override<a name="line.397"></a>
+<span class="sourceLineNo">398</span> public boolean hasNext() {<a name="line.398"></a>
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+<span class="sourceLineNo">401</span><a name="line.401"></a>
+<span class="sourceLineNo">402</span> @Override<a name="line.402"></a>
+<span class="sourceLineNo">403</span> public boolean isNextFinished() {<a name="line.403"></a>
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<span class="sourceLineNo">407</span> @Override<a name="line.407"></a>
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-<span class="sourceLineNo">419</span> private Entry[] procedureMap;<a name="line.419"></a>
+<span class="sourceLineNo">408</span> public void skipNext() {<a name="line.408"></a>
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+<span class="sourceLineNo">411</span><a name="line.411"></a>
+<span class="sourceLineNo">412</span> @Override<a name="line.412"></a>
+<span class="sourceLineNo">413</span> public Procedure nextAsProcedure() throws IOException {<a name="line.413"></a>
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-<span class="sourceLineNo">423</span> private Entry replayOrderTail;<a name="line.423"></a>
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-<span class="sourceLineNo">429</span> private Entry childUnlinkedHead;<a name="line.429"></a>
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+<span class="sourceLineNo">422</span> public ProcedureInfo nextAsProcedureInfo() {<a name="line.422"></a>
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+<span class="sourceLineNo">424</span> return current.convertToInfo();<a name="line.424"></a>
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+<span class="sourceLineNo">428</span> }<a name="line.428"></a>
+<span class="sourceLineNo">429</span> }<a name="line.429"></a>
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-<span class="sourceLineNo">450</span> if (isNew) {<a name="line.450"></a>
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-<span class="sourceLineNo">456</span> }<a name="line.456"></a>
-<span class="sourceLineNo">457</span> }<a name="line.457"></a>
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-<span class="sourceLineNo">464</span> unlinkFromLinkList(entry);<a name="line.464"></a>
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+<span class="sourceLineNo">436</span> private Entry replayOrderHead;<a name="line.436"></a>
+<span class="sourceLineNo">437</span> private Entry replayOrderTail;<a name="line.437"></a>
+<span class="sourceLineNo">438</span><a name="line.438"></a>
+<span class="sourceLineNo">439</span> // root linked-list<a name="line.439"></a>
+<span class="sourceLineNo">440</span> private Entry rootHead;<a name="line.440"></a>
+<span class="sourceLineNo">441</span><a name="line.441"></a>
+<span class="sourceLineNo">442</span> // pending unlinked children (root not present yet)<a name="line.442"></a>
+<span class="sourceLineNo">443</span> private Entry childUnlinkedHead;<a name="line.443"></a>
+<span class="sourceLineNo">444</span><a name="line.444"></a>
+<span class="sourceLineNo">445</span> // Track ProcId range<a name="line.445"></a>
+<span class="sourceLineNo">446</span> private long minProcId = Long.MAX_VALUE;<a name="line.446"></a>
+<span class="sourceLineNo">447</span> private long maxProcId = Long.MIN_VALUE;<a name="line.447"></a>
+<span class="sourceLineNo">448</span><a name="line.448"></a>
+<span class="sourceLineNo">449</span> public WalProcedureMap(int size) {<a name="line.449"></a>
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+<span class="sourceLineNo">452</span> replayOrderTail = null;<a name="line.452"></a>
+<span class="sourceLineNo">453</span> rootHead = null;<a name="line.453"></a>
+<span class="sourceLineNo">454</span> childUnlinkedHead = null;<a name="line.454"></a>
+<span class="sourceLineNo">455</span> }<a name="line.455"></a>
+<span class="sourceLineNo">456</span><a name="line.456"></a>
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+<span class="sourceLineNo">459</span> Entry entry = addToMap(procProto.getProcId(), procProto.hasParentId());<a name="line.459"></a>
+<span class="sourceLineNo">460</span> boolean newEntry = entry.proto == null;<a name="line.460"></a>
+<span class="sourceLineNo">461</span> // We have seen procedure WALs where the entries are out of order; see HBASE-18152.<a name="line.461"></a>
+<span class="sourceLineNo">462</span> // To compensate, only replace the Entry procedure if for sure this new procedure<a name="line.462"></a>
+<span class="sourceLineNo">463</span> // is indeed an entry that came later. TODO: Fix the writing of procedure info so<a name="line.463"></a>
+<span class="sourceLineNo">464</span> // it does not violate basic expectation, that WALs contain procedure changes going<a name="line.464"></a>
+<span class="sourceLineNo">465</span> // from start to finish in sequence.<a name="line.465"></a>
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+<span class="sourceLineNo">476</span> }<a name="line.476"></a>
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-<span class="sourceLineNo">486</span><a name="line.486"></a>
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-<span class="sourceLineNo">490</span><a name="line.490"></a>
-<span class="sourceLineNo">491</span> public void clear() {<a name="line.491"></a>
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-<span class="sourceLineNo">496</span> replayOrderTail = null;<a name="line.496"></a>
-<span class="sourceLineNo">497</span> rootHead = null;<a name="line.497"></a>
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-<span class="sourceLineNo">502</span><a name="line.502"></a>
-<span class="sourceLineNo">503</span> /*<a name="line.503"></a>
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-<span class="sourceLineNo">505</span> * the target is the "global" map, the source is the "local" map.<a name="line.505"></a>
-<span class="sourceLineNo">506</span> * - The entries in the hashtables are guaranteed to be unique.<a name="line.506"></a>
-<span class="sourceLineNo">507</span> * On replay we don't load procedures that already exist in the "global"<a name="line.507"></a>
-<span class="sourceLineNo">508</span> * map (the one we are merging the "local" in to).<a name="line.508"></a>
-<span class="sourceLineNo">509</span> * - The replayOrderList of the "local" nao will be appended to the "global"<a name="line.509"></a>
-<span class="sourceLineNo">510</span> * map replay list.<a name="line.510"></a>
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-<span class="sourceLineNo">515</span> int slotIndex = getMapSlot(p.getProcId());<a name="line.515"></a>
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-<span class="sourceLineNo">517</span> procedureMap[slotIndex] = p;<a name="line.517"></a>
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-<span class="sourceLineNo">519</span><a name="line.519"></a>
-<span class="sourceLineNo">520</span> if (replayOrderHead == null) {<a name="line.520"></a>
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-<span class="sourceLineNo">522</span> replayOrderTail = other.replayOrderTail;<a name="line.522"></a>
-<span class="sourceLineNo">523</span> rootHead = other.rootHead;<a name="line.523"></a>
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-<span class="sourceLineNo">526</span> // append replay list<a name="line.526"></a>
-<span class="sourceLineNo">527</span> assert replayOrderTail.replayNext == null;<a name="line.527"></a>
-<span class="sourceLineNo">528</span> assert other.replayOrderHead.replayPrev == null;<a name="line.528"></a>
-<span class="sourceLineNo">529</span> replayOrderTail.replayNext = other.replayOrderHead;<a name="line.529"></a>
-<span class="sourceLineNo">530</span> other.replayOrderHead.replayPrev = replayOrderTail;<a name="line.530"></a>
-<span class="sourceLineNo">531</span> replayOrderTail = other.replayOrderTail;<a name="line.531"></a>
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-<span class="sourceLineNo">533</span> // merge rootHead<a name="line.533"></a>
-<span class="sourceLineNo">534</span> if (rootHead == null) {<a name="line.534"></a>
-<span class="sourceLineNo">535</span> rootHead = other.rootHead;<a name="line.535"></a>
-<span class="sourceLineNo">536</span> } else if (other.rootHead != null) {<a name="line.536"></a>
-<span class="sourceLineNo">537</span> Entry otherTail = findLinkListTail(other.rootHead);<a name="line.537"></a>
-<span class="sourceLineNo">538</span> otherTail.linkNext = rootHead;<a name="line.538"></a>
-<span class="sourceLineNo">539</span> rootHead.linkPrev = otherTail;<a name="line.539"></a>
-<span class="sourceLineNo">540</span> rootHead = other.rootHead;<a name="line.540"></a>
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-<span class="sourceLineNo">542</span><a name="line.542"></a>
-<span class="sourceLineNo">543</span> // merge childUnlinkedHead<a name="line.543"></a>
-<span class="sourceLineNo">544</span> if (childUnlinkedHead == null) {<a name="line.544"></a>
-<span class="sourceLineNo">545</span> childUnlinkedHead = other.childUnlinkedHead;<a name="line.545"></a>
-<span class="sourceLineNo">546</span> } else if (other.childUnlinkedHead != null) {<a name="line.546"></a>
-<span class="sourceLineNo">547</span> Entry otherTail = findLinkListTail(other.childUnlinkedHead);<a name="line.547"></a>
-<span class="sourceLineNo">548</span> otherTail.linkNext = childUnlinkedHead;<a name="line.548"></a>
-<span class="sourceLineNo">549</span> childUnlinkedHead.linkPrev = otherTail;<a name="line.549"></a>
-<span class="sourceLineNo">550</span> childUnlinkedHead = other.childUnlinkedHead;<a name="line.550"></a>
-<span class="sourceLineNo">551</span> }<a name=
<TRUNCATED>