You are viewing a plain text version of this content. The canonical link for it is here.
Posted to commits@hbase.apache.org by gi...@apache.org on 2018/10/19 14:53:38 UTC
[27/46] hbase-site git commit: Published site at
05d22ed960204183fbd9bd16f1dbca6410ccde76.
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/3649682c/devapidocs/src-html/org/apache/hadoop/hbase/master/MasterServices.html
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/MasterServices.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/MasterServices.html
index 340948c..237b402 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/MasterServices.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/MasterServices.html
@@ -359,7 +359,7 @@
<span class="sourceLineNo">351</span> * @return true if master is in maintanceMode<a name="line.351"></a>
<span class="sourceLineNo">352</span> * @throws IOException if the inquiry failed due to an IO problem<a name="line.352"></a>
<span class="sourceLineNo">353</span> */<a name="line.353"></a>
-<span class="sourceLineNo">354</span> boolean isInMaintenanceMode() throws IOException;<a name="line.354"></a>
+<span class="sourceLineNo">354</span> boolean isInMaintenanceMode();<a name="line.354"></a>
<span class="sourceLineNo">355</span><a name="line.355"></a>
<span class="sourceLineNo">356</span> /**<a name="line.356"></a>
<span class="sourceLineNo">357</span> * Abort a procedure.<a name="line.357"></a>
http://git-wip-us.apache.org/repos/asf/hbase-site/blob/3649682c/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.FlushedSequenceIdFlusher.html
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diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.FlushedSequenceIdFlusher.html b/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.FlushedSequenceIdFlusher.html
index c13e4a4..f1c0bc3 100644
--- a/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.FlushedSequenceIdFlusher.html
+++ b/devapidocs/src-html/org/apache/hadoop/hbase/master/ServerManager.FlushedSequenceIdFlusher.html
@@ -769,423 +769,426 @@
<span class="sourceLineNo">761</span> * RegionServers to check-in.<a name="line.761"></a>
<span class="sourceLineNo">762</span> */<a name="line.762"></a>
<span class="sourceLineNo">763</span> private int getMinToStart() {<a name="line.763"></a>
-<span class="sourceLineNo">764</span> // One server should be enough to get us off the ground.<a name="line.764"></a>
-<span class="sourceLineNo">765</span> int requiredMinToStart = 1;<a name="line.765"></a>
-<span class="sourceLineNo">766</span> if (LoadBalancer.isTablesOnMaster(master.getConfiguration())) {<a name="line.766"></a>
-<span class="sourceLineNo">767</span> if (LoadBalancer.isSystemTablesOnlyOnMaster(master.getConfiguration())) {<a name="line.767"></a>
-<span class="sourceLineNo">768</span> // If Master is carrying regions but NOT user-space regions, it<a name="line.768"></a>
-<span class="sourceLineNo">769</span> // still shows as a 'server'. We need at least one more server to check<a name="line.769"></a>
-<span class="sourceLineNo">770</span> // in before we can start up so set defaultMinToStart to 2.<a name="line.770"></a>
-<span class="sourceLineNo">771</span> requiredMinToStart = requiredMinToStart + 1;<a name="line.771"></a>
-<span class="sourceLineNo">772</span> }<a name="line.772"></a>
-<span class="sourceLineNo">773</span> }<a name="line.773"></a>
-<span class="sourceLineNo">774</span> int minToStart = this.master.getConfiguration().getInt(WAIT_ON_REGIONSERVERS_MINTOSTART, -1);<a name="line.774"></a>
-<span class="sourceLineNo">775</span> // Ensure we are never less than requiredMinToStart else stuff won't work.<a name="line.775"></a>
-<span class="sourceLineNo">776</span> return minToStart == -1 || minToStart < requiredMinToStart? requiredMinToStart: minToStart;<a name="line.776"></a>
-<span class="sourceLineNo">777</span> }<a name="line.777"></a>
-<span class="sourceLineNo">778</span><a name="line.778"></a>
-<span class="sourceLineNo">779</span> /**<a name="line.779"></a>
-<span class="sourceLineNo">780</span> * Wait for the region servers to report in.<a name="line.780"></a>
-<span class="sourceLineNo">781</span> * We will wait until one of this condition is met:<a name="line.781"></a>
-<span class="sourceLineNo">782</span> * - the master is stopped<a name="line.782"></a>
-<span class="sourceLineNo">783</span> * - the 'hbase.master.wait.on.regionservers.maxtostart' number of<a name="line.783"></a>
-<span class="sourceLineNo">784</span> * region servers is reached<a name="line.784"></a>
-<span class="sourceLineNo">785</span> * - the 'hbase.master.wait.on.regionservers.mintostart' is reached AND<a name="line.785"></a>
-<span class="sourceLineNo">786</span> * there have been no new region server in for<a name="line.786"></a>
-<span class="sourceLineNo">787</span> * 'hbase.master.wait.on.regionservers.interval' time AND<a name="line.787"></a>
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-<span class="sourceLineNo">793</span> final long interval = this.master.getConfiguration().<a name="line.793"></a>
-<span class="sourceLineNo">794</span> getLong(WAIT_ON_REGIONSERVERS_INTERVAL, 1500);<a name="line.794"></a>
-<span class="sourceLineNo">795</span> final long timeout = this.master.getConfiguration().<a name="line.795"></a>
-<span class="sourceLineNo">796</span> getLong(WAIT_ON_REGIONSERVERS_TIMEOUT, 4500);<a name="line.796"></a>
-<span class="sourceLineNo">797</span> // Min is not an absolute; just a friction making us wait longer on server checkin.<a name="line.797"></a>
-<span class="sourceLineNo">798</span> int minToStart = getMinToStart();<a name="line.798"></a>
-<span class="sourceLineNo">799</span> int maxToStart = this.master.getConfiguration().<a name="line.799"></a>
-<span class="sourceLineNo">800</span> getInt(WAIT_ON_REGIONSERVERS_MAXTOSTART, Integer.MAX_VALUE);<a name="line.800"></a>
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-<span class="sourceLineNo">802</span> LOG.warn(String.format("The value of '%s' (%d) is set less than '%s' (%d), ignoring.",<a name="line.802"></a>
-<span class="sourceLineNo">803</span> WAIT_ON_REGIONSERVERS_MAXTOSTART, maxToStart,<a name="line.803"></a>
-<span class="sourceLineNo">804</span> WAIT_ON_REGIONSERVERS_MINTOSTART, minToStart));<a name="line.804"></a>
-<span class="sourceLineNo">805</span> maxToStart = Integer.MAX_VALUE;<a name="line.805"></a>
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-<span class="sourceLineNo">808</span> long now = System.currentTimeMillis();<a name="line.808"></a>
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-<span class="sourceLineNo">810</span> long slept = 0;<a name="line.810"></a>
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-<span class="sourceLineNo">812</span> long lastCountChange = startTime;<a name="line.812"></a>
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-<span class="sourceLineNo">814</span> int oldCount = 0;<a name="line.814"></a>
-<span class="sourceLineNo">815</span> // This while test is a little hard to read. We try to comment it in below but in essence:<a name="line.815"></a>
-<span class="sourceLineNo">816</span> // Wait if Master is not stopped and the number of regionservers that have checked-in is<a name="line.816"></a>
-<span class="sourceLineNo">817</span> // less than the maxToStart. Both of these conditions will be true near universally.<a name="line.817"></a>
-<span class="sourceLineNo">818</span> // Next, we will keep cycling if ANY of the following three conditions are true:<a name="line.818"></a>
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-<span class="sourceLineNo">820</span> // 2. We are under the total timeout.<a name="line.820"></a>
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-<span class="sourceLineNo">825</span> while (!this.master.isStopped() && !isClusterShutdown() && count < maxToStart &&<a name="line.825"></a>
-<span class="sourceLineNo">826</span> ((lastCountChange + interval) > now || timeout > slept || count < minToStart)) {<a name="line.826"></a>
-<span class="sourceLineNo">827</span> // Log some info at every interval time or if there is a change<a name="line.827"></a>
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-<span class="sourceLineNo">829</span> lastLogTime = now;<a name="line.829"></a>
-<span class="sourceLineNo">830</span> String msg =<a name="line.830"></a>
-<span class="sourceLineNo">831</span> "Waiting on regionserver count=" + count + "; waited="+<a name="line.831"></a>
-<span class="sourceLineNo">832</span> slept + "ms, expecting min=" + minToStart + " server(s), max="+ getStrForMax(maxToStart) +<a name="line.832"></a>
-<span class="sourceLineNo">833</span> " server(s), " + "timeout=" + timeout + "ms, lastChange=" + (lastCountChange - now) + "ms";<a name="line.833"></a>
-<span class="sourceLineNo">834</span> LOG.info(msg);<a name="line.834"></a>
-<span class="sourceLineNo">835</span> status.setStatus(msg);<a name="line.835"></a>
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-<span class="sourceLineNo">837</span><a name="line.837"></a>
-<span class="sourceLineNo">838</span> // We sleep for some time<a name="line.838"></a>
-<span class="sourceLineNo">839</span> final long sleepTime = 50;<a name="line.839"></a>
-<span class="sourceLineNo">840</span> Thread.sleep(sleepTime);<a name="line.840"></a>
-<span class="sourceLineNo">841</span> now = System.currentTimeMillis();<a name="line.841"></a>
-<span class="sourceLineNo">842</span> slept = now - startTime;<a name="line.842"></a>
-<span class="sourceLineNo">843</span><a name="line.843"></a>
-<span class="sourceLineNo">844</span> oldCount = count;<a name="line.844"></a>
-<span class="sourceLineNo">845</span> count = countOfRegionServers();<a name="line.845"></a>
-<span class="sourceLineNo">846</span> if (count != oldCount) {<a name="line.846"></a>
-<span class="sourceLineNo">847</span> lastCountChange = now;<a name="line.847"></a>
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-<span class="sourceLineNo">849</span> }<a name="line.849"></a>
-<span class="sourceLineNo">850</span> // Did we exit the loop because cluster is going down?<a name="line.850"></a>
-<span class="sourceLineNo">851</span> if (isClusterShutdown()) {<a name="line.851"></a>
-<span class="sourceLineNo">852</span> this.master.stop("Cluster shutdown");<a name="line.852"></a>
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-<span class="sourceLineNo">854</span> LOG.info("Finished waiting on RegionServer count=" + count + "; waited=" + slept + "ms," +<a name="line.854"></a>
-<span class="sourceLineNo">855</span> " expected min=" + minToStart + " server(s), max=" + getStrForMax(maxToStart) + " server(s),"+<a name="line.855"></a>
-<span class="sourceLineNo">856</span> " master is "+ (this.master.isStopped() ? "stopped.": "running"));<a name="line.856"></a>
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-<span class="sourceLineNo">858</span><a name="line.858"></a>
-<span class="sourceLineNo">859</span> private String getStrForMax(final int max) {<a name="line.859"></a>
-<span class="sourceLineNo">860</span> return max == Integer.MAX_VALUE? "NO_LIMIT": Integer.toString(max);<a name="line.860"></a>
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-<span class="sourceLineNo">862</span><a name="line.862"></a>
-<span class="sourceLineNo">863</span> /**<a name="line.863"></a>
-<span class="sourceLineNo">864</span> * @return A copy of the internal list of online servers.<a name="line.864"></a>
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-<span class="sourceLineNo">866</span> public List<ServerName> getOnlineServersList() {<a name="line.866"></a>
-<span class="sourceLineNo">867</span> // TODO: optimize the load balancer call so we don't need to make a new list<a name="line.867"></a>
-<span class="sourceLineNo">868</span> // TODO: FIX. THIS IS POPULAR CALL.<a name="line.868"></a>
-<span class="sourceLineNo">869</span> return new ArrayList<>(this.onlineServers.keySet());<a name="line.869"></a>
-<span class="sourceLineNo">870</span> }<a name="line.870"></a>
-<span class="sourceLineNo">871</span><a name="line.871"></a>
-<span class="sourceLineNo">872</span> /**<a name="line.872"></a>
-<span class="sourceLineNo">873</span> * @param keys The target server name<a name="line.873"></a>
-<span class="sourceLineNo">874</span> * @param idleServerPredicator Evaluates the server on the given load<a name="line.874"></a>
-<span class="sourceLineNo">875</span> * @return A copy of the internal list of online servers matched by the predicator<a name="line.875"></a>
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-<span class="sourceLineNo">877</span> public List<ServerName> getOnlineServersListWithPredicator(List<ServerName> keys,<a name="line.877"></a>
-<span class="sourceLineNo">878</span> Predicate<ServerMetrics> idleServerPredicator) {<a name="line.878"></a>
-<span class="sourceLineNo">879</span> List<ServerName> names = new ArrayList<>();<a name="line.879"></a>
-<span class="sourceLineNo">880</span> if (keys != null && idleServerPredicator != null) {<a name="line.880"></a>
-<span class="sourceLineNo">881</span> keys.forEach(name -> {<a name="line.881"></a>
-<span class="sourceLineNo">882</span> ServerMetrics load = onlineServers.get(name);<a name="line.882"></a>
-<span class="sourceLineNo">883</span> if (load != null) {<a name="line.883"></a>
-<span class="sourceLineNo">884</span> if (idleServerPredicator.test(load)) {<a name="line.884"></a>
-<span class="sourceLineNo">885</span> names.add(name);<a name="line.885"></a>
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-<span class="sourceLineNo">893</span> /**<a name="line.893"></a>
-<span class="sourceLineNo">894</span> * @return A copy of the internal list of draining servers.<a name="line.894"></a>
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-<span class="sourceLineNo">896</span> public List<ServerName> getDrainingServersList() {<a name="line.896"></a>
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-<span class="sourceLineNo">899</span><a name="line.899"></a>
-<span class="sourceLineNo">900</span> public boolean isServerOnline(ServerName serverName) {<a name="line.900"></a>
-<span class="sourceLineNo">901</span> return serverName != null && onlineServers.containsKey(serverName);<a name="line.901"></a>
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-<span class="sourceLineNo">904</span> /**<a name="line.904"></a>
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-<span class="sourceLineNo">906</span> * or known to be dead, or unknown to this manager (i.e, not online,<a name="line.906"></a>
-<span class="sourceLineNo">907</span> * not known to be dead either. it is simply not tracked by the<a name="line.907"></a>
-<span class="sourceLineNo">908</span> * master any more, for example, a very old previous instance).<a name="line.908"></a>
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-<span class="sourceLineNo">911</span> return serverName == null || deadservers.isDeadServer(serverName);<a name="line.911"></a>
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-<span class="sourceLineNo">914</span> public void shutdownCluster() {<a name="line.914"></a>
-<span class="sourceLineNo">915</span> String statusStr = "Cluster shutdown requested of master=" + this.master.getServerName();<a name="line.915"></a>
-<span class="sourceLineNo">916</span> LOG.info(statusStr);<a name="line.916"></a>
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-<span class="sourceLineNo">918</span> if (onlineServers.isEmpty()) {<a name="line.918"></a>
-<span class="sourceLineNo">919</span> // we do not synchronize here so this may cause a double stop, but not a big deal<a name="line.919"></a>
-<span class="sourceLineNo">920</span> master.stop("OnlineServer=0 right after cluster shutdown set");<a name="line.920"></a>
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-<span class="sourceLineNo">934</span> // when reach here, RegionStates should loaded, firstly, we call remove deleted regions<a name="line.934"></a>
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-<span class="sourceLineNo">937</span> FLUSHEDSEQUENCEID_FLUSHER_INTERVAL_DEFAULT);<a name="line.937"></a>
-<span class="sourceLineNo">938</span> flushedSeqIdFlusher = new FlushedSequenceIdFlusher(<a name="line.938"></a>
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-<span class="sourceLineNo">949</span> flushedSeqIdFlusher.cancel();<a name="line.949"></a>
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-<span class="sourceLineNo">955</span> LOG.warn("Failed to persist last flushed sequence id of regions"<a name="line.955"></a>
-<span class="sourceLineNo">956</span> + " to file system", e);<a name="line.956"></a>
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-<span class="sourceLineNo">970</span> destServers.removeAll(serversToExclude);<a name="line.970"></a>
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