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From mi...@apache.org
Subject [35/51] [partial] hbase-site git commit: Published site at 52fd70500e0a00e273e2ec0c09d7c914b89432ce.
Date Thu, 24 Mar 2016 15:55:15 GMT
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/f30982bd/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncProcess.Retry.html
----------------------------------------------------------------------
diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncProcess.Retry.html b/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncProcess.Retry.html
index ed7bc7f..e65df71 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncProcess.Retry.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/client/AsyncProcess.Retry.html
@@ -1198,681 +1198,699 @@
 <span class="sourceLineNo">1190</span>        byte[] row = e.getValue().iterator().next().getAction().getRow();<a name="line.1190"></a>
 <span class="sourceLineNo">1191</span>        // Do not use the exception for updating cache because it might be coming from<a name="line.1191"></a>
 <span class="sourceLineNo">1192</span>        // any of the regions in the MultiAction.<a name="line.1192"></a>
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-<span class="sourceLineNo">1194</span>          connection.updateCachedLocations(tableName, regionName, row,<a name="line.1194"></a>
-<span class="sourceLineNo">1195</span>              ClientExceptionsUtil.isMetaClearingException(t) ? null : t, server);<a name="line.1195"></a>
-<span class="sourceLineNo">1196</span>        }<a name="line.1196"></a>
-<span class="sourceLineNo">1197</span>        for (Action&lt;Row&gt; action : e.getValue()) {<a name="line.1197"></a>
-<span class="sourceLineNo">1198</span>          Retry retry = manageError(<a name="line.1198"></a>
-<span class="sourceLineNo">1199</span>              action.getOriginalIndex(), action.getAction(), canRetry, t, server);<a name="line.1199"></a>
-<span class="sourceLineNo">1200</span>          if (retry == Retry.YES) {<a name="line.1200"></a>
-<span class="sourceLineNo">1201</span>            toReplay.add(action);<a name="line.1201"></a>
-<span class="sourceLineNo">1202</span>          } else if (retry == Retry.NO_OTHER_SUCCEEDED) {<a name="line.1202"></a>
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-<span class="sourceLineNo">1212</span>      } else {<a name="line.1212"></a>
-<span class="sourceLineNo">1213</span>        resubmit(server, toReplay, numAttempt, rsActions.size(), t);<a name="line.1213"></a>
+<span class="sourceLineNo">1193</span>        try {<a name="line.1193"></a>
+<span class="sourceLineNo">1194</span>          if (tableName != null) {<a name="line.1194"></a>
+<span class="sourceLineNo">1195</span>            connection.updateCachedLocations(tableName, regionName, row,<a name="line.1195"></a>
+<span class="sourceLineNo">1196</span>              ClientExceptionsUtil.isMetaClearingException(t) ? null : t, server);<a name="line.1196"></a>
+<span class="sourceLineNo">1197</span>          }<a name="line.1197"></a>
+<span class="sourceLineNo">1198</span>        } catch (Throwable ex) {<a name="line.1198"></a>
+<span class="sourceLineNo">1199</span>          // That should never happen, but if it did, we want to make sure<a name="line.1199"></a>
+<span class="sourceLineNo">1200</span>          // we still process errors<a name="line.1200"></a>
+<span class="sourceLineNo">1201</span>          LOG.error("Couldn't update cached region locations: " + ex);<a name="line.1201"></a>
+<span class="sourceLineNo">1202</span>        }<a name="line.1202"></a>
+<span class="sourceLineNo">1203</span>        for (Action&lt;Row&gt; action : e.getValue()) {<a name="line.1203"></a>
+<span class="sourceLineNo">1204</span>          Retry retry = manageError(<a name="line.1204"></a>
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+<span class="sourceLineNo">1207</span>            toReplay.add(action);<a name="line.1207"></a>
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-<span class="sourceLineNo">1219</span>     * submit it again after a back off sleep.<a name="line.1219"></a>
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-<span class="sourceLineNo">1227</span>      //  2) We want to take into account the location when calculating the sleep time.<a name="line.1227"></a>
-<span class="sourceLineNo">1228</span>      //  3) If all this is just because the response needed to be chunked try again FAST.<a name="line.1228"></a>
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-<span class="sourceLineNo">1230</span>      //  we go for one.<a name="line.1230"></a>
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-<span class="sourceLineNo">1232</span>      int nextAttemptNumber = retryImmediately ? numAttempt : numAttempt + 1;<a name="line.1232"></a>
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-<span class="sourceLineNo">1235</span>      if (numAttempt &gt; startLogErrorsCnt) {<a name="line.1235"></a>
-<span class="sourceLineNo">1236</span>        // We use this value to have some logs when we have multiple failures, but not too many<a name="line.1236"></a>
-<span class="sourceLineNo">1237</span>        //  logs, as errors are to be expected when a region moves, splits and so on<a name="line.1237"></a>
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-<span class="sourceLineNo">1262</span>          // Only log final failures as warning<a name="line.1262"></a>
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-<span class="sourceLineNo">1275</span>     * @param responses      - the response, if any<a name="line.1275"></a>
-<span class="sourceLineNo">1276</span>     * @param numAttempt     - the attempt<a name="line.1276"></a>
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-<span class="sourceLineNo">1281</span><a name="line.1281"></a>
-<span class="sourceLineNo">1282</span>      // Success or partial success<a name="line.1282"></a>
-<span class="sourceLineNo">1283</span>      // Analyze detailed results. We can still have individual failures to be redo.<a name="line.1283"></a>
-<span class="sourceLineNo">1284</span>      // two specific throwables are managed:<a name="line.1284"></a>
-<span class="sourceLineNo">1285</span>      //  - DoNotRetryIOException: we continue to retry for other actions<a name="line.1285"></a>
-<span class="sourceLineNo">1286</span>      //  - RegionMovedException: we update the cache with the new region location<a name="line.1286"></a>
+<span class="sourceLineNo">1215</span><a name="line.1215"></a>
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+<span class="sourceLineNo">1218</span>      } else {<a name="line.1218"></a>
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+<span class="sourceLineNo">1221</span>    }<a name="line.1221"></a>
+<span class="sourceLineNo">1222</span><a name="line.1222"></a>
+<span class="sourceLineNo">1223</span>    /**<a name="line.1223"></a>
+<span class="sourceLineNo">1224</span>     * Log as much info as possible, and, if there is something to replay,<a name="line.1224"></a>
+<span class="sourceLineNo">1225</span>     * submit it again after a back off sleep.<a name="line.1225"></a>
+<span class="sourceLineNo">1226</span>     */<a name="line.1226"></a>
+<span class="sourceLineNo">1227</span>    private void resubmit(ServerName oldServer, List&lt;Action&lt;Row&gt;&gt; toReplay,<a name="line.1227"></a>
+<span class="sourceLineNo">1228</span>        int numAttempt, int failureCount, Throwable throwable) {<a name="line.1228"></a>
+<span class="sourceLineNo">1229</span>      // We have something to replay. We're going to sleep a little before.<a name="line.1229"></a>
+<span class="sourceLineNo">1230</span><a name="line.1230"></a>
+<span class="sourceLineNo">1231</span>      // We have two contradicting needs here:<a name="line.1231"></a>
+<span class="sourceLineNo">1232</span>      //  1) We want to get the new location after having slept, as it may change.<a name="line.1232"></a>
+<span class="sourceLineNo">1233</span>      //  2) We want to take into account the location when calculating the sleep time.<a name="line.1233"></a>
+<span class="sourceLineNo">1234</span>      //  3) If all this is just because the response needed to be chunked try again FAST.<a name="line.1234"></a>
+<span class="sourceLineNo">1235</span>      // It should be possible to have some heuristics to take the right decision. Short term,<a name="line.1235"></a>
+<span class="sourceLineNo">1236</span>      //  we go for one.<a name="line.1236"></a>
+<span class="sourceLineNo">1237</span>      boolean retryImmediately = throwable instanceof RetryImmediatelyException;<a name="line.1237"></a>
+<span class="sourceLineNo">1238</span>      int nextAttemptNumber = retryImmediately ? numAttempt : numAttempt + 1;<a name="line.1238"></a>
+<span class="sourceLineNo">1239</span>      long backOffTime = retryImmediately ? 0 :<a name="line.1239"></a>
+<span class="sourceLineNo">1240</span>          errorsByServer.calculateBackoffTime(oldServer, pause);<a name="line.1240"></a>
+<span class="sourceLineNo">1241</span>      if (numAttempt &gt; startLogErrorsCnt) {<a name="line.1241"></a>
+<span class="sourceLineNo">1242</span>        // We use this value to have some logs when we have multiple failures, but not too many<a name="line.1242"></a>
+<span class="sourceLineNo">1243</span>        //  logs, as errors are to be expected when a region moves, splits and so on<a name="line.1243"></a>
+<span class="sourceLineNo">1244</span>        LOG.info(createLog(numAttempt, failureCount, toReplay.size(),<a name="line.1244"></a>
+<span class="sourceLineNo">1245</span>            oldServer, throwable, backOffTime, true, null, -1, -1));<a name="line.1245"></a>
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+<span class="sourceLineNo">1252</span>      } catch (InterruptedException e) {<a name="line.1252"></a>
+<span class="sourceLineNo">1253</span>        LOG.warn("#" + id + ", not sent: " + toReplay.size() + " operations, " + oldServer, e);<a name="line.1253"></a>
+<span class="sourceLineNo">1254</span>        Thread.currentThread().interrupt();<a name="line.1254"></a>
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+<span class="sourceLineNo">1268</span>          // Only log final failures as warning<a name="line.1268"></a>
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+<span class="sourceLineNo">1276</span>    /**<a name="line.1276"></a>
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-<span class="sourceLineNo">1288</span>      List&lt;Action&lt;Row&gt;&gt; toReplay = new ArrayList&lt;Action&lt;Row&gt;&gt;();<a name="line.1288"></a>
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-<span class="sourceLineNo">1301</span>            ?  null : results.get(regionName).result;<a name="line.1301"></a>
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-<span class="sourceLineNo">1303</span>          if (!responses.getExceptions().containsKey(regionName)) {<a name="line.1303"></a>
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+<span class="sourceLineNo">1434</span><a name="line.1434"></a>
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+<span class="sourceLineNo">1451</span>    /**<a name="line.1451"></a>
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+<span class="sourceLineNo">1454</span>     * @param result The result.<a name="line.1454"></a>
+<span class="sourceLineNo">1455</span>     */<a name="line.1455"></a>
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+<span class="sourceLineNo">1471</span>      // At this point we know that state is set to replica tracking class.<a name="line.1471"></a>
+<span class="sourceLineNo">1472</span>      // It could be that someone else is also looking at it; however, we know there can<a name="line.1472"></a>
+<span class="sourceLineNo">1473</span>      // only be one state object, and only one thread can set callCount to 0. Other threads<a name="line.1473"></a>
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+<span class="sourceLineNo">1491</span><a name="line.1491"></a>
+<span class="sourceLineNo">1492</span>    /**<a name="line.1492"></a>
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+<span class="sourceLineNo">1495</span>     * @param row Original request.<a name="line.1495"></a>
+<span class="sourceLineNo">1496</span>     * @param throwable The resulting error.<a name="line.1496"></a>
+<span class="sourceLineNo">1497</span>     * @param server The source server.<a name="line.1497"></a>
+<span class="sourceLineNo">1498</span>     */<a name="line.1498"></a>
+<span class="sourceLineNo">1499</span>    private void setError(int index, Row row, Throwable throwable, ServerName server) {<a name="line.1499"></a>
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+<span class="sourceLineNo">1502</span>        // Note that we currently cannot have replica requests with null results. So it shouldn't<a name="line.1502"></a>
+<span class="sourceLineNo">1503</span>        // happen that multiple replica calls will call dAC for same actions with results == null.<a name="line.1503"></a>
+<span class="sourceLineNo">1504</span>        // Only one call per action should be present in this case.<a name="line.1504"></a>
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+<span class="sourceLineNo">1510</span>      if (state == null) {<a name="line.1510"></a>
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+<span class="sourceLineNo">1512</span>      }<a name="line.1512"></a>
+<span class="sourceLineNo">1513</span>      BatchErrors target = null; // Error will be added to final errors, or temp replica errors.<a name="line.1513"></a>
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+<span class="sourceLineNo">1515</span>      synchronized (state) {<a name="line.1515"></a>
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+<span class="sourceLineNo">1518</span>          case 1: { // All calls failed, we are the last error.<a name="line.1518"></a>
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+<span class="sourceLineNo">1522</span>          }<a name="line.1522"></a>
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+<span class="sourceLineNo">1526</span>              state.replicaErrors = new BatchErrors();<a name="line.1526"></a>
+<span class="sourceLineNo">1527</span>            }<a name="line.1527"></a>
+<span class="sourceLineNo">1528</span>            target = state.replicaErrors;<a name="line.1528"></a>
+<span class="sourceLineNo">1529</span>            break;<a name="line.1529"></a>
+<span class="sourceLineNo">1530</span>          }<a name="line.1530"></a>
+<span class="sourceLineNo">1531</span>        }<a name="line.1531"></a>
+<span class="sourceLineNo">1532</span>        --state.callCount;<a name="line.1532"></a>
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+<span class="sourceLineNo">1535</span>      if (isActionDone) {<a name="line.1535"></a>
+<span class="sourceLineNo">1536</span>        if (state.replicaErrors != null) { // last call, no need to lock<a name="line.1536"></a>
+<span class="sourceLineNo">1537</span>          errors.merge(state.replicaErrors);<a name="line.1537"></a>
+<span class="sourceLineNo">1538</span>        }<a name="line.1538"></a>
+<span class="sourceLineNo">1539</span>        // See setResult for explanations.<a name="line.1539"></a>
+<span class="sourceLineNo">1540</span>        synchronized (replicaResultLock) {<a name="line.1540"></a>
+<span class="sourceLineNo">1541</span>          if (results[index] != state) {<a name="line.1541"></a>
+<span class="sourceLineNo">1542</span>            throw new AssertionError("We set the callCount but someone else replaced the result");<a name="line.1542"></a>
+<span class="sourceLineNo">1543</span>          }<a name="line.1543"></a>
+<span class="sourceLineNo">1544</span>          results[index] = throwable;<a name="line.1544"></a>
+<span class="sourceLineNo">1545</span>        }<a name="line.1545"></a>
+<span class="sourceLineNo">1546</span>        decActionCounter(index);<a name="line.1546"></a>
+<span class="sourceLineNo">1547</span>      }<a name="line.1547"></a>
+<span class="sourceLineNo">1548</span>    }<a name="line.1548"></a>
+<span class="sourceLineNo">1549</span><a name="line.1549"></a>
+<span class="sourceLineNo">1550</span>    /**<a name="line.1550"></a>
+<span class="sourceLineNo">1551</span>     * Checks if the action is complete; used on error to prevent needless retries.<a name="line.1551"></a>
+<span class="sourceLineNo">1552</span>     * Does not synchronize, assuming element index/field accesses are atomic.<a name="line.1552"></a>
+<span class="sourceLineNo">1553</span>     * This is an opportunistic optimization check, doesn't have to be strict.<a name="line.1553"></a>
+<span class="sourceLineNo">1554</span>     * @param index Original action index.<a name="line.1554"></a>
+<span class="sourceLineNo">1555</span>     * @param row Original request.<a name="line.1555"></a>
+<span class="sourceLineNo">1556</span>     */<a name="line.1556"></a>
+<span class="sourceLineNo">1557</span>    private boolean isActionComplete(int index, Row row) {<a name="line.1557"></a>
+<span class="sourceLineNo">1558</span>      if (!isReplicaGet(row)) return false;<a name="line.1558"></a>
+<span class="sourceLineNo">1559</span>      Object resObj = results[index];<a name="line.1559"></a>
+<span class="sourceLineNo">1560</span>      return (resObj != null) &amp;&amp; (!(resObj instanceof ReplicaResultState)<a name="line.1560"></a>
+<span class="sourceLineNo">1561</span>          || ((ReplicaResultState)resObj).callCount == 0);<a name="line.1561"></a>
+<span class="sourceLineNo">1562</span>    }<a name="line.1562"></a>
+<span class="sourceLineNo">1563</span><a name="line.1563"></a>
+<span class="sourceLineNo">1564</span>    /**<a name="line.1564"></a>
+<span class="sourceLineNo">1565</span>     * Tries to set the result or error for a particular action as if there were no replica calls.<a name="line.1565"></a>
+<span class="sourceLineNo">1566</span>     * @return null if successful; replica state if there were in fact replica calls.<a name="line.1566"></a>
+<span class="sourceLineNo">1567</span>     */<a name="line.1567"></a>
+<span class="sourceLineNo">1568</span>    private ReplicaResultState trySetResultSimple(int index, Row row, boolean isError,<a name="line.1568"></a>
+<span class="sourceLineNo">1569</span>        Object result, ServerName server, boolean isFromReplica) {<a name="line.1569"></a>
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+<span class="sourceLineNo">1571</span>      if (!isReplicaGet(row)) {<a name="line.1571"></a>
+<span class="sourceLineNo">1572</span>        if (isFromReplica) {<a name="line.1572"></a>
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+<span class="sourceLineNo">1574</span>        }<a name="line.1574"></a>
+<span class="sourceLineNo">1575</span>        results[index] = result;<a name="line.1575"></a>
+<span class="sourceLineNo">1576</span>      } else {<a name="line.1576"></a>
+<span class="sourceLineNo">1577</span>        synchronized (replicaResultLock) {<a name="line.1577"></a>
+<span class="sourceLineNo">1578</span>          resObj = results[index];<a name="line.1578"></a>
+<span class="sourceLineNo">1579</span>          if (resObj == null) {<a name="line.1579"></a>
+<span class="sourceLineNo">1580</span>            if (isFromReplica) {<a name="line.1580"></a>
+<span class="sourceLineNo">1581</span>              throw new AssertionError("Unexpected stale result for " + row);<a name="line.1581"></a>
+<span class="sourceLineNo">1582</span>            }<a name="line.1582"></a>
+<span class="sourceLineNo">1583</span>            results[index] = result;<a name="line.1583"></a>
+<span class="sourceLineNo">1584</span>          }<a name="line.1584"></a>
+<span class="sourceLineNo">1585</span>        }<a name="line.1585"></a>
+<span class="sourceLineNo">1586</span>      }<a name="line.1586"></a>
+<span class="sourceLineNo">1587</span><a name="line.1587"></a>
+<span class="sourceLineNo">1588</span>      ReplicaResultState rrs =<a name="line.1588"></a>
+<span class="sourceLineNo">1589</span>          (resObj instanceof ReplicaResultState) ? (ReplicaRes

<TRUNCATED>

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