http://git-wip-us.apache.org/repos/asf/hbase-site/blob/47be635d/devapidocs/src-html/org/apache/hadoop/hbase/monitoring/MonitoredTaskImpl.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/monitoring/MonitoredTaskImpl.html b/devapidocs/src-html/org/apache/hadoop/hbase/monitoring/MonitoredTaskImpl.html index ff0f5c4..f54c12f 100644 --- a/devapidocs/src-html/org/apache/hadoop/hbase/monitoring/MonitoredTaskImpl.html +++ b/devapidocs/src-html/org/apache/hadoop/hbase/monitoring/MonitoredTaskImpl.html @@ -38,155 +38,167 @@ <span class="sourceLineNo">030</span> private long startTime;<a name="line.30"></a> <span class="sourceLineNo">031</span> private long statusTime;<a name="line.31"></a> <span class="sourceLineNo">032</span> private long stateTime;<a name="line.32"></a> -<span class="sourceLineNo">033</span> <a name="line.33"></a> -<span class="sourceLineNo">034</span> private volatile String status;<a 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http://git-wip-us.apache.org/repos/asf/hbase-site/blob/47be635d/devapidocs/src-html/org/apache/hadoop/hbase/monitoring/TaskMonitor.MonitorRunnable.html ---------------------------------------------------------------------- diff --git a/devapidocs/src-html/org/apache/hadoop/hbase/monitoring/TaskMonitor.MonitorRunnable.html b/devapidocs/src-html/org/apache/hadoop/hbase/monitoring/TaskMonitor.MonitorRunnable.html new file mode 100644 index 0000000..380e362 --- /dev/null +++ b/devapidocs/src-html/org/apache/hadoop/hbase/monitoring/TaskMonitor.MonitorRunnable.html @@ -0,0 +1,355 @@ +<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd";> +<html lang="en"> +<head> +<title>Source code</title> +<link rel="stylesheet" type="text/css" href="../../../../../../stylesheet.css" title="Style"> +</head> +<body> +<div class="sourceContainer"> +<pre><span class="sourceLineNo">001</span>/**<a name="line.1"></a> +<span class="sourceLineNo">002</span> *<a name="line.2"></a> +<span class="sourceLineNo">003</span> * Licensed to the Apache Software Foundation (ASF) under one<a name="line.3"></a> +<span class="sourceLineNo">004</span> * or more contributor license agreements. See the NOTICE file<a name="line.4"></a> +<span class="sourceLineNo">005</span> * distributed with this work for additional information<a name="line.5"></a> +<span class="sourceLineNo">006</span> * regarding copyright ownership. The ASF licenses this file<a name="line.6"></a> +<span class="sourceLineNo">007</span> * to you under the Apache License, Version 2.0 (the<a name="line.7"></a> +<span class="sourceLineNo">008</span> * "License"); you may not use this file except in compliance<a name="line.8"></a> +<span class="sourceLineNo">009</span> * with the License. You may obtain a copy of the License at<a name="line.9"></a> +<span class="sourceLineNo">010</span> *<a name="line.10"></a> +<span class="sourceLineNo">011</span> * http://www.apache.org/licenses/LICENSE-2.0<a name="line.11"></a> +<span class="sourceLineNo">012</span> *<a name="line.12"></a> +<span class="sourceLineNo">013</span> * Unless required by applicable law or agreed to in writing, software<a name="line.13"></a> +<span class="sourceLineNo">014</span> * distributed under the License is distributed on an "AS IS" BASIS,<a name="line.14"></a> +<span class="sourceLineNo">015</span> * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.<a name="line.15"></a> +<span class="sourceLineNo">016</span> * See the License for the specific language governing permissions and<a name="line.16"></a> +<span class="sourceLineNo">017</span> * limitations under the License.<a name="line.17"></a> +<span class="sourceLineNo">018</span> */<a name="line.18"></a> +<span class="sourceLineNo">019</span>package org.apache.hadoop.hbase.monitoring;<a name="line.19"></a> +<span class="sourceLineNo">020</span><a name="line.20"></a> +<span class="sourceLineNo">021</span>import java.io.PrintWriter;<a name="line.21"></a> +<span class="sourceLineNo">022</span>import java.lang.ref.WeakReference;<a name="line.22"></a> +<span class="sourceLineNo">023</span>import java.lang.reflect.InvocationHandler;<a name="line.23"></a> +<span class="sourceLineNo">024</span>import java.lang.reflect.Method;<a name="line.24"></a> +<span class="sourceLineNo">025</span>import java.lang.reflect.Proxy;<a name="line.25"></a> +<span class="sourceLineNo">026</span>import java.util.ArrayList;<a name="line.26"></a> +<span class="sourceLineNo">027</span>import java.util.Iterator;<a name="line.27"></a> +<span class="sourceLineNo">028</span>import java.util.List;<a name="line.28"></a> +<span class="sourceLineNo">029</span><a name="line.29"></a> +<span class="sourceLineNo">030</span>import org.apache.commons.collections.buffer.CircularFifoBuffer;<a name="line.30"></a> +<span class="sourceLineNo">031</span>import org.apache.commons.logging.Log;<a name="line.31"></a> +<span class="sourceLineNo">032</span>import org.apache.commons.logging.LogFactory;<a name="line.32"></a> +<span class="sourceLineNo">033</span>import org.apache.hadoop.conf.Configuration;<a name="line.33"></a> +<span class="sourceLineNo">034</span>import org.apache.hadoop.hbase.HBaseConfiguration;<a name="line.34"></a> +<span class="sourceLineNo">035</span>import org.apache.hadoop.hbase.classification.InterfaceAudience;<a name="line.35"></a> +<span class="sourceLineNo">036</span>import org.apache.hadoop.hbase.util.EnvironmentEdgeManager;<a name="line.36"></a> +<span class="sourceLineNo">037</span>import org.apache.hadoop.hbase.util.Threads;<a name="line.37"></a> +<span class="sourceLineNo">038</span><a name="line.38"></a> +<span class="sourceLineNo">039</span>import org.apache.hadoop.hbase.shaded.com.google.common.collect.Lists;<a name="line.39"></a> +<span class="sourceLineNo">040</span><a name="line.40"></a> +<span class="sourceLineNo">041</span>/**<a name="line.41"></a> +<span class="sourceLineNo">042</span> * Singleton which keeps track of tasks going on in this VM.<a name="line.42"></a> +<span class="sourceLineNo">043</span> * A Task here is anything which takes more than a few seconds<a name="line.43"></a> +<span class="sourceLineNo">044</span> * and the user might want to inquire about the status<a name="line.44"></a> +<span class="sourceLineNo">045</span> */<a name="line.45"></a> +<span class="sourceLineNo">046</span>@InterfaceAudience.Private<a name="line.46"></a> +<span class="sourceLineNo">047</span>public class TaskMonitor {<a name="line.47"></a> +<span class="sourceLineNo">048</span> private static final Log LOG = LogFactory.getLog(TaskMonitor.class);<a name="line.48"></a> +<span class="sourceLineNo">049</span><a name="line.49"></a> +<span class="sourceLineNo">050</span> public static final String MAX_TASKS_KEY = "hbase.taskmonitor.max.tasks";<a name="line.50"></a> +<span class="sourceLineNo">051</span> public static final int DEFAULT_MAX_TASKS = 1000;<a name="line.51"></a> +<span class="sourceLineNo">052</span> public static final String RPC_WARN_TIME_KEY = "hbase.taskmonitor.rpc.warn.time";<a name="line.52"></a> +<span class="sourceLineNo">053</span> public static final long DEFAULT_RPC_WARN_TIME = 0;<a name="line.53"></a> +<span class="sourceLineNo">054</span> public static final String EXPIRATION_TIME_KEY = "hbase.taskmonitor.expiration.time";<a name="line.54"></a> +<span class="sourceLineNo">055</span> public static final long DEFAULT_EXPIRATION_TIME = 60*1000;<a name="line.55"></a> +<span class="sourceLineNo">056</span> public static final String MONITOR_INTERVAL_KEY = "hbase.taskmonitor.monitor.interval";<a name="line.56"></a> +<span class="sourceLineNo">057</span> public static final long DEFAULT_MONITOR_INTERVAL = 10*1000;<a name="line.57"></a> +<span class="sourceLineNo">058</span><a name="line.58"></a> +<span class="sourceLineNo">059</span> private static TaskMonitor instance;<a name="line.59"></a> +<span class="sourceLineNo">060</span><a name="line.60"></a> +<span class="sourceLineNo">061</span> private final int maxTasks;<a name="line.61"></a> +<span class="sourceLineNo">062</span> private final long rpcWarnTime;<a name="line.62"></a> +<span class="sourceLineNo">063</span> private final long expirationTime;<a name="line.63"></a> +<span class="sourceLineNo">064</span> private final CircularFifoBuffer tasks;<a name="line.64"></a> +<span class="sourceLineNo">065</span> private final List<TaskAndWeakRefPair> rpcTasks;<a name="line.65"></a> +<span class="sourceLineNo">066</span> private final long monitorInterval;<a name="line.66"></a> +<span class="sourceLineNo">067</span> private Thread monitorThread;<a name="line.67"></a> +<span class="sourceLineNo">068</span><a name="line.68"></a> +<span class="sourceLineNo">069</span> TaskMonitor(Configuration conf) {<a name="line.69"></a> +<span class="sourceLineNo">070</span> maxTasks = conf.getInt(MAX_TASKS_KEY, DEFAULT_MAX_TASKS);<a name="line.70"></a> +<span class="sourceLineNo">071</span> expirationTime = conf.getLong(EXPIRATION_TIME_KEY, DEFAULT_EXPIRATION_TIME);<a name="line.71"></a> +<span class="sourceLineNo">072</span> rpcWarnTime = conf.getLong(RPC_WARN_TIME_KEY, DEFAULT_RPC_WARN_TIME);<a name="line.72"></a> +<span class="sourceLineNo">073</span> tasks = new CircularFifoBuffer(maxTasks);<a name="line.73"></a> +<span class="sourceLineNo">074</span> rpcTasks = Lists.newArrayList();<a name="line.74"></a> +<span class="sourceLineNo">075</span> monitorInterval = conf.getLong(MONITOR_INTERVAL_KEY, DEFAULT_MONITOR_INTERVAL);<a name="line.75"></a> +<span class="sourceLineNo">076</span> monitorThread = new Thread(new MonitorRunnable());<a name="line.76"></a> +<span class="sourceLineNo">077</span> Threads.setDaemonThreadRunning(monitorThread, "Monitor thread for TaskMonitor");<a name="line.77"></a> +<span class="sourceLineNo">078</span> }<a name="line.78"></a> +<span class="sourceLineNo">079</span><a name="line.79"></a> +<span class="sourceLineNo">080</span> /**<a name="line.80"></a> +<span class="sourceLineNo">081</span> * Get singleton instance.<a name="line.81"></a> +<span class="sourceLineNo">082</span> * TODO this would be better off scoped to a single daemon<a name="line.82"></a> +<span class="sourceLineNo">083</span> */<a name="line.83"></a> +<span class="sourceLineNo">084</span> public static synchronized TaskMonitor get() {<a name="line.84"></a> +<span class="sourceLineNo">085</span> if (instance == null) {<a name="line.85"></a> +<span class="sourceLineNo">086</span> instance = new TaskMonitor(HBaseConfiguration.create());<a name="line.86"></a> +<span class="sourceLineNo">087</span> }<a name="line.87"></a> +<span class="sourceLineNo">088</span> return instance;<a name="line.88"></a> +<span class="sourceLineNo">089</span> }<a name="line.89"></a> +<span class="sourceLineNo">090</span> <a name="line.90"></a> +<span class="sourceLineNo">091</span> public synchronized MonitoredTask createStatus(String description) {<a name="line.91"></a> +<span class="sourceLineNo">092</span> MonitoredTask stat = new MonitoredTaskImpl();<a name="line.92"></a> +<span class="sourceLineNo">093</span> stat.setDescription(description);<a name="line.93"></a> +<span class="sourceLineNo">094</span> MonitoredTask proxy = (MonitoredTask) Proxy.newProxyInstance(<a name="line.94"></a> +<span class="sourceLineNo">095</span> stat.getClass().getClassLoader(),<a name="line.95"></a> +<span class="sourceLineNo">096</span> new Class<?>[] { MonitoredTask.class },<a name="line.96"></a> +<span class="sourceLineNo">097</span> new PassthroughInvocationHandler<>(stat));<a name="line.97"></a> +<span class="sourceLineNo">098</span> TaskAndWeakRefPair pair = new TaskAndWeakRefPair(stat, proxy);<a name="line.98"></a> +<span class="sourceLineNo">099</span> if (tasks.isFull()) {<a name="line.99"></a> +<span class="sourceLineNo">100</span> purgeExpiredTasks();<a name="line.100"></a> +<span class="sourceLineNo">101</span> }<a name="line.101"></a> +<span class="sourceLineNo">102</span> tasks.add(pair);<a name="line.102"></a> +<span class="sourceLineNo">103</span> return proxy;<a name="line.103"></a> +<span class="sourceLineNo">104</span> }<a name="line.104"></a> +<span class="sourceLineNo">105</span><a name="line.105"></a> +<span class="sourceLineNo">106</span> public synchronized MonitoredRPCHandler createRPCStatus(String description) {<a name="line.106"></a> +<span class="sourceLineNo">107</span> MonitoredRPCHandler stat = new MonitoredRPCHandlerImpl();<a name="line.107"></a> +<span class="sourceLineNo">108</span> stat.setDescription(description);<a name="line.108"></a> +<span class="sourceLineNo">109</span> MonitoredRPCHandler proxy = (MonitoredRPCHandler) Proxy.newProxyInstance(<a name="line.109"></a> +<span class="sourceLineNo">110</span> stat.getClass().getClassLoader(),<a name="line.110"></a> +<span class="sourceLineNo">111</span> new Class<?>[] { MonitoredRPCHandler.class },<a name="line.111"></a> +<span class="sourceLineNo">112</span> new PassthroughInvocationHandler<>(stat));<a name="line.112"></a> +<span class="sourceLineNo">113</span> TaskAndWeakRefPair pair = new TaskAndWeakRefPair(stat, proxy);<a name="line.113"></a> +<span class="sourceLineNo">114</span> rpcTasks.add(pair);<a name="line.114"></a> +<span class="sourceLineNo">115</span> return proxy;<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> private synchronized void warnStuckTasks() {<a name="line.118"></a> +<span class="sourceLineNo">119</span> if (rpcWarnTime > 0) {<a name="line.119"></a> +<span class="sourceLineNo">120</span> final long now = EnvironmentEdgeManager.currentTime();<a name="line.120"></a> +<span class="sourceLineNo">121</span> for (Iterator<TaskAndWeakRefPair> it = rpcTasks.iterator();<a name="line.121"></a> +<span class="sourceLineNo">122</span> it.hasNext();) {<a name="line.122"></a> +<span class="sourceLineNo">123</span> TaskAndWeakRefPair pair = it.next();<a name="line.123"></a> +<span class="sourceLineNo">124</span> MonitoredTask stat = pair.get();<a name="line.124"></a> +<span class="sourceLineNo">125</span> if ((stat.getState() == MonitoredTaskImpl.State.RUNNING) &&<a name="line.125"></a> +<span class="sourceLineNo">126</span> (now >= stat.getWarnTime() + rpcWarnTime)) {<a name="line.126"></a> +<span class="sourceLineNo">127</span> LOG.warn("Task may be stuck: " + stat);<a name="line.127"></a> +<span class="sourceLineNo">128</span> stat.setWarnTime(now);<a name="line.128"></a> +<span class="sourceLineNo">129</span> }<a name="line.129"></a> +<span class="sourceLineNo">130</span> }<a name="line.130"></a> +<span class="sourceLineNo">131</span> }<a name="line.131"></a> +<span class="sourceLineNo">132</span> }<a name="line.132"></a> +<span class="sourceLineNo">133</span><a name="line.133"></a> +<span class="sourceLineNo">134</span> private synchronized void purgeExpiredTasks() {<a name="line.134"></a> +<span class="sourceLineNo">135</span> for (Iterator<TaskAndWeakRefPair> it = tasks.iterator();<a name="line.135"></a> +<span class="sourceLineNo">136</span> it.hasNext();) {<a name="line.136"></a> +<span class="sourceLineNo">137</span> TaskAndWeakRefPair pair = it.next();<a name="line.137"></a> +<span class="sourceLineNo">138</span> MonitoredTask stat = pair.get();<a name="line.138"></a> +<span class="sourceLineNo">139</span> <a name="line.139"></a> +<span class="sourceLineNo">140</span> if (pair.isDead()) {<a name="line.140"></a> +<span class="sourceLineNo">141</span> // The class who constructed this leaked it. So we can<a name="line.141"></a> +<span class="sourceLineNo">142</span> // assume it's done.<a name="line.142"></a> +<span class="sourceLineNo">143</span> if (stat.getState() == MonitoredTaskImpl.State.RUNNING) {<a name="line.143"></a> +<span class="sourceLineNo">144</span> LOG.warn("Status " + stat + " appears to have been leaked");<a name="line.144"></a> +<span class="sourceLineNo">145</span> stat.cleanup();<a name="line.145"></a> +<span class="sourceLineNo">146</span> }<a name="line.146"></a> +<span class="sourceLineNo">147</span> }<a name="line.147"></a> +<span class="sourceLineNo">148</span> <a name="line.148"></a> +<span class="sourceLineNo">149</span> if (canPurge(stat)) {<a name="line.149"></a> +<span class="sourceLineNo">150</span> it.remove();<a name="line.150"></a> +<span class="sourceLineNo">151</span> }<a name="line.151"></a> +<span class="sourceLineNo">152</span> }<a name="line.152"></a> +<span class="sourceLineNo">153</span> }<a name="line.153"></a> +<span class="sourceLineNo">154</span><a name="line.154"></a> +<span class="sourceLineNo">155</span> /**<a name="line.155"></a> +<span class="sourceLineNo">156</span> * Produces a list containing copies of the current state of all non-expired <a name="line.156"></a> +<span class="sourceLineNo">157</span> * MonitoredTasks handled by this TaskMonitor.<a name="line.157"></a> +<span class="sourceLineNo">158</span> * @return A complete list of MonitoredTasks.<a name="line.158"></a> +<span class="sourceLineNo">159</span> */<a name="line.159"></a> +<span class="sourceLineNo">160</span> public synchronized List<MonitoredTask> getTasks() {<a name="line.160"></a> +<span class="sourceLineNo">161</span> purgeExpiredTasks();<a name="line.161"></a> +<span class="sourceLineNo">162</span> ArrayList<MonitoredTask> ret = Lists.newArrayListWithCapacity(tasks.size() + rpcTasks.size());<a name="line.162"></a> +<span class="sourceLineNo">163</span> for (Iterator<TaskAndWeakRefPair> it = tasks.iterator();<a name="line.163"></a> +<span class="sourceLineNo">164</span> it.hasNext();) {<a name="line.164"></a> +<span class="sourceLineNo">165</span> TaskAndWeakRefPair pair = it.next();<a name="line.165"></a> +<span class="sourceLineNo">166</span> MonitoredTask t = pair.get();<a name="line.166"></a> +<span class="sourceLineNo">167</span> ret.add(t.clone());<a name="line.167"></a> +<span class="sourceLineNo">168</span> }<a name="line.168"></a> +<span class="sourceLineNo">169</span> for (Iterator<TaskAndWeakRefPair> it = rpcTasks.iterator();<a name="line.169"></a> +<span class="sourceLineNo">170</span> it.hasNext();) {<a name="line.170"></a> +<span class="sourceLineNo">171</span> TaskAndWeakRefPair pair = it.next();<a name="line.171"></a> +<span class="sourceLineNo">172</span> MonitoredTask t = pair.get();<a name="line.172"></a> +<span class="sourceLineNo">173</span> ret.add(t.clone());<a name="line.173"></a> +<span class="sourceLineNo">174</span> }<a name="line.174"></a> +<span class="sourceLineNo">175</span> return ret;<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> private boolean canPurge(MonitoredTask stat) {<a name="line.178"></a> +<span class="sourceLineNo">179</span> long cts = stat.getCompletionTimestamp();<a name="line.179"></a> +<span class="sourceLineNo">180</span> return (cts > 0 && EnvironmentEdgeManager.currentTime() - cts > expirationTime);<a name="line.180"></a> +<span class="sourceLineNo">181</span> }<a name="line.181"></a> +<span class="sourceLineNo">182</span><a name="line.182"></a> +<span class="sourceLineNo">183</span> public void dumpAsText(PrintWriter out) {<a name="line.183"></a> +<span class="sourceLineNo">184</span> long now = EnvironmentEdgeManager.currentTime();<a name="line.184"></a> +<span class="sourceLineNo">185</span> <a name="line.185"></a> +<span class="sourceLineNo">186</span> List<MonitoredTask> tasks = getTasks();<a name="line.186"></a> +<span class="sourceLineNo">187</span> for (MonitoredTask task : tasks) {<a name="line.187"></a> +<span class="sourceLineNo">188</span> out.println("Task: " + task.getDescription());<a name="line.188"></a> +<span class="sourceLineNo">189</span> out.println("Status: " + task.getState() + ":" + task.getStatus());<a name="line.189"></a> +<span class="sourceLineNo">190</span> long running = (now - task.getStartTime())/1000;<a name="line.190"></a> +<span class="sourceLineNo">191</span> if (task.getCompletionTimestamp() != -1) {<a name="line.191"></a> +<span class="sourceLineNo">192</span> long completed = (now - task.getCompletionTimestamp()) / 1000;<a name="line.192"></a> +<span class="sourceLineNo">193</span> out.println("Completed " + completed + "s ago");<a name="line.193"></a> +<span class="sourceLineNo">194</span> out.println("Ran for " +<a name="line.194"></a> +<span class="sourceLineNo">195</span> (task.getCompletionTimestamp() - task.getStartTime())/1000<a name="line.195"></a> +<span class="sourceLineNo">196</span> + "s");<a name="line.196"></a> +<span class="sourceLineNo">197</span> } else {<a name="line.197"></a> +<span class="sourceLineNo">198</span> out.println("Running for " + running + "s");<a name="line.198"></a> +<span class="sourceLineNo">199</span> }<a name="line.199"></a> +<span class="sourceLineNo">200</span> out.println();<a name="line.200"></a> +<span class="sourceLineNo">201</span> }<a name="line.201"></a> +<span class="sourceLineNo">202</span> }<a name="line.202"></a> +<span class="sourceLineNo">203</span><a name="line.203"></a> +<span class="sourceLineNo">204</span> public synchronized void shutdown() {<a name="line.204"></a> +<span class="sourceLineNo">205</span> if (this.monitorThread != null) {<a name="line.205"></a> +<span class="sourceLineNo">206</span> monitorThread.interrupt();<a name="line.206"></a> +<span class="sourceLineNo">207</span> }<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> /**<a name="line.210"></a> +<span class="sourceLineNo">211</span> * This class encapsulates an object as well as a weak reference to a proxy<a name="line.211"></a> +<span class="sourceLineNo">212</span> * that passes through calls to that object. In art form:<a name="line.212"></a> +<span class="sourceLineNo">213</span> * <pre><a name="line.213"></a> +<span class="sourceLineNo">214</span> * Proxy <------------------<a name="line.214"></a> +<span class="sourceLineNo">215</span> * | \<a name="line.215"></a> +<span class="sourceLineNo">216</span> * v \<a name="line.216"></a> +<span class="sourceLineNo">217</span> * PassthroughInvocationHandler | weak reference<a name="line.217"></a> +<span class="sourceLineNo">218</span> * | /<a name="line.218"></a> +<span class="sourceLineNo">219</span> * MonitoredTaskImpl / <a name="line.219"></a> +<span class="sourceLineNo">220</span> * | /<a name="line.220"></a> +<span class="sourceLineNo">221</span> * StatAndWeakRefProxy ------/<a name="line.221"></a> +<span class="sourceLineNo">222</span> * </pre><a name="line.222"></a> +<span class="sourceLineNo">223</span> * Since we only return the Proxy to the creator of the MonitorableStatus,<a name="line.223"></a> +<span class="sourceLineNo">224</span> * this means that they can leak that object, and we'll detect it<a name="line.224"></a> +<span class="sourceLineNo">225</span> * since our weak reference will go null. 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