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+<title>TestZkFlapping xref</title>
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+<div id="overview"><a href="../../../../../../testapidocs/org/apache/helix/manager/zk/TestZkFlapping.html">View Javadoc</a></div><pre>
+
+<a class="jxr_linenumber" name="1" href="#1">1</a> <strong class="jxr_keyword">package</strong> org.apache.helix.manager.zk;
+<a class="jxr_linenumber" name="2" href="#2">2</a>
+<a class="jxr_linenumber" name="3" href="#3">3</a> <strong class="jxr_keyword">import</strong> java.util.Date;
+<a class="jxr_linenumber" name="4" href="#4">4</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.CountDownLatch;
+<a class="jxr_linenumber" name="5" href="#5">5</a> <strong class="jxr_keyword">import</strong> java.util.concurrent.atomic.AtomicInteger;
+<a class="jxr_linenumber" name="6" href="#6">6</a>
+<a class="jxr_linenumber" name="7" href="#7">7</a> <strong class="jxr_keyword">import</strong> org.I0Itec.zkclient.IZkDataListener;
+<a class="jxr_linenumber" name="8" href="#8">8</a> <strong class="jxr_keyword">import</strong> org.I0Itec.zkclient.IZkStateListener;
+<a class="jxr_linenumber" name="9" href="#9">9</a> <strong class="jxr_keyword">import</strong> org.apache.helix.PropertyKey;
+<a class="jxr_linenumber" name="10" href="#10">10</a> <strong class="jxr_keyword">import</strong> org.apache.helix.ZNRecord;
+<a class="jxr_linenumber" name="11" href="#11">11</a> <strong class="jxr_keyword">import</strong> org.apache.helix.HelixDataAccessor;
+<a class="jxr_linenumber" name="12" href="#12">12</a> <strong class="jxr_keyword">import</strong> org.apache.helix.TestHelper;
+<a class="jxr_linenumber" name="13" href="#13">13</a> <strong class="jxr_keyword">import</strong> org.apache.helix.TestHelper.Verifier;
+<a class="jxr_linenumber" name="14" href="#14">14</a> <strong class="jxr_keyword">import</strong> org.apache.helix.ZkTestHelper;
+<a class="jxr_linenumber" name="15" href="#15">15</a> <strong class="jxr_keyword">import</strong> org.apache.helix.ZkUnitTestBase;
+<a class="jxr_linenumber" name="16" href="#16">16</a> <strong class="jxr_keyword">import</strong> org.apache.helix.mock.controller.ClusterController;
+<a class="jxr_linenumber" name="17" href="#17">17</a> <strong class="jxr_keyword">import</strong> org.apache.helix.mock.participant.MockParticipant;
+<a class="jxr_linenumber" name="18" href="#18">18</a> <strong class="jxr_keyword">import</strong> org.apache.helix.model.LiveInstance;
+<a class="jxr_linenumber" name="19" href="#19">19</a> <strong class="jxr_keyword">import</strong> org.apache.zookeeper.Watcher.Event.KeeperState;
+<a class="jxr_linenumber" name="20" href="#20">20</a> <strong class="jxr_keyword">import</strong> org.testng.Assert;
+<a class="jxr_linenumber" name="21" href="#21">21</a> <strong class="jxr_keyword">import</strong> org.testng.annotations.Test;
+<a class="jxr_linenumber" name="22" href="#22">22</a>
+<a class="jxr_linenumber" name="23" href="#23">23</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/helix/manager/zk/TestZkFlapping.html">TestZkFlapping</a> <strong class="jxr_keyword">extends</strong> <a href="../../../../../org/apache/helix/ZkUnitTestBase.html">ZkUnitTestBase</a> {
+<a class="jxr_linenumber" name="24" href="#24">24</a>
+<a class="jxr_linenumber" name="25" href="#25">25</a> @Test
+<a class="jxr_linenumber" name="26" href="#26">26</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testZkSessionExpiry() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="27" href="#27">27</a> String className = TestHelper.getTestClassName();
+<a class="jxr_linenumber" name="28" href="#28">28</a> String methodName = TestHelper.getTestMethodName();
+<a class="jxr_linenumber" name="29" href="#29">29</a> String clusterName = className + <span class="jxr_string">"_"</span> + methodName;
+<a class="jxr_linenumber" name="30" href="#30">30</a> System.out.println(<span class="jxr_string">"START "</span> + clusterName + <span class="jxr_string">" at "</span> + <strong class="jxr_keyword">new</strong> Date(System.currentTimeMillis()));
+<a class="jxr_linenumber" name="31" href="#31">31</a>
+<a class="jxr_linenumber" name="32" href="#32">32</a> ZkClient client =
+<a class="jxr_linenumber" name="33" href="#33">33</a> <strong class="jxr_keyword">new</strong> ZkClient(ZK_ADDR, ZkClient.DEFAULT_SESSION_TIMEOUT,
+<a class="jxr_linenumber" name="34" href="#34">34</a> ZkClient.DEFAULT_CONNECTION_TIMEOUT, <strong class="jxr_keyword">new</strong> ZNRecordSerializer());
+<a class="jxr_linenumber" name="35" href="#35">35</a>
+<a class="jxr_linenumber" name="36" href="#36">36</a> String path = String.format(<span class="jxr_string">"/%s"</span>, clusterName);
+<a class="jxr_linenumber" name="37" href="#37">37</a> client.createEphemeral(path);
+<a class="jxr_linenumber" name="38" href="#38">38</a> String oldSessionId = ZkTestHelper.getSessionId(client);
+<a class="jxr_linenumber" name="39" href="#39">39</a> ZkTestHelper.expireSession(client);
+<a class="jxr_linenumber" name="40" href="#40">40</a> String newSessionId = ZkTestHelper.getSessionId(client);
+<a class="jxr_linenumber" name="41" href="#41">41</a> Assert.assertNotSame(newSessionId, oldSessionId);
+<a class="jxr_linenumber" name="42" href="#42">42</a> Assert.assertFalse(client.exists(path), <span class="jxr_string">"Ephemeral znode should be gone after session expiry"</span>);
+<a class="jxr_linenumber" name="43" href="#43">43</a> client.close();
+<a class="jxr_linenumber" name="44" href="#44">44</a> System.out.println(<span class="jxr_string">"END "</span> + clusterName + <span class="jxr_string">" at "</span> + <strong class="jxr_keyword">new</strong> Date(System.currentTimeMillis()));
+<a class="jxr_linenumber" name="45" href="#45">45</a> }
+<a class="jxr_linenumber" name="46" href="#46">46</a>
+<a class="jxr_linenumber" name="47" href="#47">47</a> @Test
+<a class="jxr_linenumber" name="48" href="#48">48</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testCloseZkClient() {
+<a class="jxr_linenumber" name="49" href="#49">49</a> String className = TestHelper.getTestClassName();
+<a class="jxr_linenumber" name="50" href="#50">50</a> String methodName = TestHelper.getTestMethodName();
+<a class="jxr_linenumber" name="51" href="#51">51</a> String clusterName = className + <span class="jxr_string">"_"</span> + methodName;
+<a class="jxr_linenumber" name="52" href="#52">52</a> System.out.println(<span class="jxr_string">"START "</span> + clusterName + <span class="jxr_string">" at "</span> + <strong class="jxr_keyword">new</strong> Date(System.currentTimeMillis()));
+<a class="jxr_linenumber" name="53" href="#53">53</a>
+<a class="jxr_linenumber" name="54" href="#54">54</a> ZkClient client =
+<a class="jxr_linenumber" name="55" href="#55">55</a> <strong class="jxr_keyword">new</strong> ZkClient(ZK_ADDR, ZkClient.DEFAULT_SESSION_TIMEOUT,
+<a class="jxr_linenumber" name="56" href="#56">56</a> ZkClient.DEFAULT_CONNECTION_TIMEOUT, <strong class="jxr_keyword">new</strong> ZNRecordSerializer());
+<a class="jxr_linenumber" name="57" href="#57">57</a> String path = String.format(<span class="jxr_string">"/%s"</span>, clusterName);
+<a class="jxr_linenumber" name="58" href="#58">58</a> client.createEphemeral(path);
+<a class="jxr_linenumber" name="59" href="#59">59</a>
+<a class="jxr_linenumber" name="60" href="#60">60</a> client.close();
+<a class="jxr_linenumber" name="61" href="#61">61</a> Assert.assertFalse(_gZkClient.exists(path), <span class="jxr_string">"Ephemeral node: "</span> + path
+<a class="jxr_linenumber" name="62" href="#62">62</a> + <span class="jxr_string">" should be removed after ZkClient#close()"</span>);
+<a class="jxr_linenumber" name="63" href="#63">63</a> System.out.println(<span class="jxr_string">"END "</span> + clusterName + <span class="jxr_string">" at "</span> + <strong class="jxr_keyword">new</strong> Date(System.currentTimeMillis()));
+<a class="jxr_linenumber" name="64" href="#64">64</a> }
+<a class="jxr_linenumber" name="65" href="#65">65</a>
+<a class="jxr_linenumber" name="66" href="#66">66</a> @Test
+<a class="jxr_linenumber" name="67" href="#67">67</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testCloseZkClientInZkClientEventThread() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="68" href="#68">68</a> String className = TestHelper.getTestClassName();
+<a class="jxr_linenumber" name="69" href="#69">69</a> String methodName = TestHelper.getTestMethodName();
+<a class="jxr_linenumber" name="70" href="#70">70</a> String clusterName = className + <span class="jxr_string">"_"</span> + methodName;
+<a class="jxr_linenumber" name="71" href="#71">71</a> System.out.println(<span class="jxr_string">"START "</span> + clusterName + <span class="jxr_string">" at "</span> + <strong class="jxr_keyword">new</strong> Date(System.currentTimeMillis()));
+<a class="jxr_linenumber" name="72" href="#72">72</a>
+<a class="jxr_linenumber" name="73" href="#73">73</a> <strong class="jxr_keyword">final</strong> CountDownLatch waitCallback = <strong class="jxr_keyword">new</strong> CountDownLatch(1);
+<a class="jxr_linenumber" name="74" href="#74">74</a> <strong class="jxr_keyword">final</strong> ZkClient client =
+<a class="jxr_linenumber" name="75" href="#75">75</a> <strong class="jxr_keyword">new</strong> ZkClient(ZK_ADDR, ZkClient.DEFAULT_SESSION_TIMEOUT,
+<a class="jxr_linenumber" name="76" href="#76">76</a> ZkClient.DEFAULT_CONNECTION_TIMEOUT, <strong class="jxr_keyword">new</strong> ZNRecordSerializer());
+<a class="jxr_linenumber" name="77" href="#77">77</a> String path = String.format(<span class="jxr_string">"/%s"</span>, clusterName);
+<a class="jxr_linenumber" name="78" href="#78">78</a> client.createEphemeral(path);
+<a class="jxr_linenumber" name="79" href="#79">79</a> client.subscribeDataChanges(path, <strong class="jxr_keyword">new</strong> IZkDataListener() {
+<a class="jxr_linenumber" name="80" href="#80">80</a>
+<a class="jxr_linenumber" name="81" href="#81">81</a> @Override
+<a class="jxr_linenumber" name="82" href="#82">82</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleDataDeleted(String dataPath) <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="83" href="#83">83</a> }
+<a class="jxr_linenumber" name="84" href="#84">84</a>
+<a class="jxr_linenumber" name="85" href="#85">85</a> @Override
+<a class="jxr_linenumber" name="86" href="#86">86</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleDataChange(String dataPath, Object data) <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="87" href="#87">87</a> client.close();
+<a class="jxr_linenumber" name="88" href="#88">88</a> waitCallback.countDown();
+<a class="jxr_linenumber" name="89" href="#89">89</a> }
+<a class="jxr_linenumber" name="90" href="#90">90</a> });
+<a class="jxr_linenumber" name="91" href="#91">91</a>
+<a class="jxr_linenumber" name="92" href="#92">92</a> client.writeData(path, <strong class="jxr_keyword">new</strong> ZNRecord(<span class="jxr_string">"test"</span>));
+<a class="jxr_linenumber" name="93" href="#93">93</a> waitCallback.await();
+<a class="jxr_linenumber" name="94" href="#94">94</a> Assert.assertFalse(_gZkClient.exists(path), <span class="jxr_string">"Ephemeral node: "</span> + path
+<a class="jxr_linenumber" name="95" href="#95">95</a> + <span class="jxr_string">" should be removed after ZkClient#close() in its own event-thread"</span>);
+<a class="jxr_linenumber" name="96" href="#96">96</a>
+<a class="jxr_linenumber" name="97" href="#97">97</a> System.out.println(<span class="jxr_string">"END "</span> + clusterName + <span class="jxr_string">" at "</span> + <strong class="jxr_keyword">new</strong> Date(System.currentTimeMillis()));
+<a class="jxr_linenumber" name="98" href="#98">98</a>
+<a class="jxr_linenumber" name="99" href="#99">99</a> }
+<a class="jxr_linenumber" name="100" href="#100">100</a>
+<a class="jxr_linenumber" name="101" href="#101">101</a> <strong class="jxr_keyword">class</strong> <a href="../../../../../org/apache/helix/manager/zk/TestZkFlapping.html">ZkStateCountListener</a> <strong class="jxr_keyword">implements</strong> IZkStateListener {
+<a class="jxr_linenumber" name="102" href="#102">102</a> <strong class="jxr_keyword">int</strong> count = 0;
+<a class="jxr_linenumber" name="103" href="#103">103</a>
+<a class="jxr_linenumber" name="104" href="#104">104</a> @Override
+<a class="jxr_linenumber" name="105" href="#105">105</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleStateChanged(KeeperState state) <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="106" href="#106">106</a> <strong class="jxr_keyword">if</strong> (state == KeeperState.Disconnected) {
+<a class="jxr_linenumber" name="107" href="#107">107</a> count++;
+<a class="jxr_linenumber" name="108" href="#108">108</a> }
+<a class="jxr_linenumber" name="109" href="#109">109</a> }
+<a class="jxr_linenumber" name="110" href="#110">110</a>
+<a class="jxr_linenumber" name="111" href="#111">111</a> @Override
+<a class="jxr_linenumber" name="112" href="#112">112</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> handleNewSession() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="113" href="#113">113</a> }
+<a class="jxr_linenumber" name="114" href="#114">114</a> }
+<a class="jxr_linenumber" name="115" href="#115">115</a>
+<a class="jxr_linenumber" name="116" href="#116">116</a> @Test
+<a class="jxr_linenumber" name="117" href="#117">117</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testParticipantFlapping() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="118" href="#118">118</a> String className = TestHelper.getTestClassName();
+<a class="jxr_linenumber" name="119" href="#119">119</a> String methodName = TestHelper.getTestMethodName();
+<a class="jxr_linenumber" name="120" href="#120">120</a> String clusterName = className + <span class="jxr_string">"_"</span> + methodName;
+<a class="jxr_linenumber" name="121" href="#121">121</a> <strong class="jxr_keyword">final</strong> HelixDataAccessor accessor =
+<a class="jxr_linenumber" name="122" href="#122">122</a> <strong class="jxr_keyword">new</strong> ZKHelixDataAccessor(clusterName, <strong class="jxr_keyword">new</strong> ZkBaseDataAccessor<ZNRecord>(_gZkClient));
+<a class="jxr_linenumber" name="123" href="#123">123</a> <strong class="jxr_keyword">final</strong> PropertyKey.Builder keyBuilder = accessor.keyBuilder();
+<a class="jxr_linenumber" name="124" href="#124">124</a>
+<a class="jxr_linenumber" name="125" href="#125">125</a> System.out.println(<span class="jxr_string">"START "</span> + clusterName + <span class="jxr_string">" at "</span> + <strong class="jxr_keyword">new</strong> Date(System.currentTimeMillis()));
+<a class="jxr_linenumber" name="126" href="#126">126</a>
+<a class="jxr_linenumber" name="127" href="#127">127</a> TestHelper.setupCluster(clusterName, ZK_ADDR, 12918, <em class="jxr_comment">// participant port</em>
+<a class="jxr_linenumber" name="128" href="#128">128</a> <span class="jxr_string">"localhost"</span>, <em class="jxr_comment">// participant name prefix</em>
+<a class="jxr_linenumber" name="129" href="#129">129</a> <span class="jxr_string">"TestDB"</span>, <em class="jxr_comment">// resource name prefix</em>
+<a class="jxr_linenumber" name="130" href="#130">130</a> 1, <em class="jxr_comment">// resources</em>
+<a class="jxr_linenumber" name="131" href="#131">131</a> 32, <em class="jxr_comment">// partitions per resource</em>
+<a class="jxr_linenumber" name="132" href="#132">132</a> 1, <em class="jxr_comment">// number of nodes</em>
+<a class="jxr_linenumber" name="133" href="#133">133</a> 1, <em class="jxr_comment">// replicas</em>
+<a class="jxr_linenumber" name="134" href="#134">134</a> <span class="jxr_string">"MasterSlave"</span>, false);
+<a class="jxr_linenumber" name="135" href="#135">135</a>
+<a class="jxr_linenumber" name="136" href="#136">136</a> <strong class="jxr_keyword">final</strong> String instanceName = <span class="jxr_string">"localhost_12918"</span>;
+<a class="jxr_linenumber" name="137" href="#137">137</a> <a href="../../../../../org/apache/helix/mock/participant/MockParticipant.html">MockParticipant</a> participant = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/mock/participant/MockParticipant.html">MockParticipant</a>(clusterName, instanceName, ZK_ADDR, <strong class="jxr_keyword">null</strong>);
+<a class="jxr_linenumber" name="138" href="#138">138</a> participant.syncStart();
+<a class="jxr_linenumber" name="139" href="#139">139</a>
+<a class="jxr_linenumber" name="140" href="#140">140</a> <strong class="jxr_keyword">final</strong> ZkClient client = participant.getManager().getZkClient();
+<a class="jxr_linenumber" name="141" href="#141">141</a> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/manager/zk/TestZkFlapping.html">ZkStateCountListener</a> listener = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/manager/zk/TestZkFlapping.html">ZkStateCountListener</a>();
+<a class="jxr_linenumber" name="142" href="#142">142</a> client.subscribeStateChanges(listener);
+<a class="jxr_linenumber" name="143" href="#143">143</a>
+<a class="jxr_linenumber" name="144" href="#144">144</a> <strong class="jxr_keyword">final</strong> AtomicInteger expectDisconnectCnt = <strong class="jxr_keyword">new</strong> AtomicInteger(0);
+<a class="jxr_linenumber" name="145" href="#145">145</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> n = ZKHelixManager.MAX_DISCONNECT_THRESHOLD;
+<a class="jxr_linenumber" name="146" href="#146">146</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i < n; i++) {
+<a class="jxr_linenumber" name="147" href="#147">147</a> String oldSessionId = ZkTestHelper.getSessionId(client);
+<a class="jxr_linenumber" name="148" href="#148">148</a> ZkTestHelper.simulateZkStateDisconnected(client);
+<a class="jxr_linenumber" name="149" href="#149">149</a> expectDisconnectCnt.incrementAndGet();
+<a class="jxr_linenumber" name="150" href="#150">150</a> <em class="jxr_comment">// wait until we get invoked by zk state change to disconnected</em>
+<a class="jxr_linenumber" name="151" href="#151">151</a> TestHelper.verify(<strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/TestHelper.html">Verifier</a>() {
+<a class="jxr_linenumber" name="152" href="#152">152</a>
+<a class="jxr_linenumber" name="153" href="#153">153</a> @Override
+<a class="jxr_linenumber" name="154" href="#154">154</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> verify() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="155" href="#155">155</a> <strong class="jxr_keyword">return</strong> listener.count == expectDisconnectCnt.get();
+<a class="jxr_linenumber" name="156" href="#156">156</a> }
+<a class="jxr_linenumber" name="157" href="#157">157</a> }, 30 * 1000);
+<a class="jxr_linenumber" name="158" href="#158">158</a>
+<a class="jxr_linenumber" name="159" href="#159">159</a> String newSessionId = ZkTestHelper.getSessionId(client);
+<a class="jxr_linenumber" name="160" href="#160">160</a> Assert.assertEquals(newSessionId, oldSessionId);
+<a class="jxr_linenumber" name="161" href="#161">161</a> }
+<a class="jxr_linenumber" name="162" href="#162">162</a> client.unsubscribeStateChanges(listener);
+<a class="jxr_linenumber" name="163" href="#163">163</a> <em class="jxr_comment">// make sure participant is NOT disconnected</em>
+<a class="jxr_linenumber" name="164" href="#164">164</a> LiveInstance liveInstance = accessor.getProperty(keyBuilder.liveInstance(instanceName));
+<a class="jxr_linenumber" name="165" href="#165">165</a> Assert.assertNotNull(liveInstance, <span class="jxr_string">"Live-instance should exist after "</span> + n + <span class="jxr_string">" disconnects"</span>);
+<a class="jxr_linenumber" name="166" href="#166">166</a>
+<a class="jxr_linenumber" name="167" href="#167">167</a> <em class="jxr_comment">// trigger flapping</em>
+<a class="jxr_linenumber" name="168" href="#168">168</a> ZkTestHelper.simulateZkStateDisconnected(client);
+<a class="jxr_linenumber" name="169" href="#169">169</a> <em class="jxr_comment">// wait until we get invoked by zk state change to disconnected</em>
+<a class="jxr_linenumber" name="170" href="#170">170</a> <strong class="jxr_keyword">boolean</strong> success = TestHelper.verify(<strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/TestHelper.html">Verifier</a>() {
+<a class="jxr_linenumber" name="171" href="#171">171</a>
+<a class="jxr_linenumber" name="172" href="#172">172</a> @Override
+<a class="jxr_linenumber" name="173" href="#173">173</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> verify() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="174" href="#174">174</a> <strong class="jxr_keyword">return</strong> client.getShutdownTrigger();
+<a class="jxr_linenumber" name="175" href="#175">175</a> }
+<a class="jxr_linenumber" name="176" href="#176">176</a> }, 30 * 1000);
+<a class="jxr_linenumber" name="177" href="#177">177</a>
+<a class="jxr_linenumber" name="178" href="#178">178</a> Assert.assertTrue(success, <span class="jxr_string">"The "</span> + (n + 1)
+<a class="jxr_linenumber" name="179" href="#179">179</a> + <span class="jxr_string">"th disconnect event should trigger ZkHelixManager#disonnect"</span>);
+<a class="jxr_linenumber" name="180" href="#180">180</a>
+<a class="jxr_linenumber" name="181" href="#181">181</a> <em class="jxr_comment">// make sure participant is disconnected</em>
+<a class="jxr_linenumber" name="182" href="#182">182</a> success = TestHelper.verify(<strong class="jxr_keyword">new</strong> TestHelper.Verifier() {
+<a class="jxr_linenumber" name="183" href="#183">183</a>
+<a class="jxr_linenumber" name="184" href="#184">184</a> @Override
+<a class="jxr_linenumber" name="185" href="#185">185</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> verify() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="186" href="#186">186</a> LiveInstance liveInstance = accessor.getProperty(keyBuilder.liveInstance(instanceName));
+<a class="jxr_linenumber" name="187" href="#187">187</a> <strong class="jxr_keyword">return</strong> liveInstance == <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="188" href="#188">188</a> }
+<a class="jxr_linenumber" name="189" href="#189">189</a> }, 3 * 1000);
+<a class="jxr_linenumber" name="190" href="#190">190</a> Assert.assertTrue(success, <span class="jxr_string">"Live-instance should be gone after "</span> + (n + 1) + <span class="jxr_string">" disconnects"</span>);
+<a class="jxr_linenumber" name="191" href="#191">191</a>
+<a class="jxr_linenumber" name="192" href="#192">192</a> System.out.println(<span class="jxr_string">"END "</span> + clusterName + <span class="jxr_string">" at "</span> + <strong class="jxr_keyword">new</strong> Date(System.currentTimeMillis()));
+<a class="jxr_linenumber" name="193" href="#193">193</a> }
+<a class="jxr_linenumber" name="194" href="#194">194</a>
+<a class="jxr_linenumber" name="195" href="#195">195</a> @Test
+<a class="jxr_linenumber" name="196" href="#196">196</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">void</strong> testControllerFlapping() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="197" href="#197">197</a> String className = TestHelper.getTestClassName();
+<a class="jxr_linenumber" name="198" href="#198">198</a> String methodName = TestHelper.getTestMethodName();
+<a class="jxr_linenumber" name="199" href="#199">199</a> String clusterName = className + <span class="jxr_string">"_"</span> + methodName;
+<a class="jxr_linenumber" name="200" href="#200">200</a> <strong class="jxr_keyword">final</strong> HelixDataAccessor accessor =
+<a class="jxr_linenumber" name="201" href="#201">201</a> <strong class="jxr_keyword">new</strong> ZKHelixDataAccessor(clusterName, <strong class="jxr_keyword">new</strong> ZkBaseDataAccessor<ZNRecord>(_gZkClient));
+<a class="jxr_linenumber" name="202" href="#202">202</a> <strong class="jxr_keyword">final</strong> PropertyKey.Builder keyBuilder = accessor.keyBuilder();
+<a class="jxr_linenumber" name="203" href="#203">203</a>
+<a class="jxr_linenumber" name="204" href="#204">204</a> System.out.println(<span class="jxr_string">"START "</span> + clusterName + <span class="jxr_string">" at "</span> + <strong class="jxr_keyword">new</strong> Date(System.currentTimeMillis()));
+<a class="jxr_linenumber" name="205" href="#205">205</a>
+<a class="jxr_linenumber" name="206" href="#206">206</a> TestHelper.setupCluster(clusterName, ZK_ADDR, 12918, <em class="jxr_comment">// participant port</em>
+<a class="jxr_linenumber" name="207" href="#207">207</a> <span class="jxr_string">"localhost"</span>, <em class="jxr_comment">// participant name prefix</em>
+<a class="jxr_linenumber" name="208" href="#208">208</a> <span class="jxr_string">"TestDB"</span>, <em class="jxr_comment">// resource name prefix</em>
+<a class="jxr_linenumber" name="209" href="#209">209</a> 1, <em class="jxr_comment">// resources</em>
+<a class="jxr_linenumber" name="210" href="#210">210</a> 32, <em class="jxr_comment">// partitions per resource</em>
+<a class="jxr_linenumber" name="211" href="#211">211</a> 1, <em class="jxr_comment">// number of nodes</em>
+<a class="jxr_linenumber" name="212" href="#212">212</a> 1, <em class="jxr_comment">// replicas</em>
+<a class="jxr_linenumber" name="213" href="#213">213</a> <span class="jxr_string">"MasterSlave"</span>, false);
+<a class="jxr_linenumber" name="214" href="#214">214</a>
+<a class="jxr_linenumber" name="215" href="#215">215</a> <a href="../../../../../org/apache/helix/mock/controller/ClusterController.html">ClusterController</a> controller = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/mock/controller/ClusterController.html">ClusterController</a>(clusterName, <span class="jxr_string">"controller"</span>, ZK_ADDR);
+<a class="jxr_linenumber" name="216" href="#216">216</a> controller.syncStart();
+<a class="jxr_linenumber" name="217" href="#217">217</a>
+<a class="jxr_linenumber" name="218" href="#218">218</a> <strong class="jxr_keyword">final</strong> ZkClient client = controller.getManager().getZkClient();
+<a class="jxr_linenumber" name="219" href="#219">219</a> <strong class="jxr_keyword">final</strong> <a href="../../../../../org/apache/helix/manager/zk/TestZkFlapping.html">ZkStateCountListener</a> listener = <strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/manager/zk/TestZkFlapping.html">ZkStateCountListener</a>();
+<a class="jxr_linenumber" name="220" href="#220">220</a> client.subscribeStateChanges(listener);
+<a class="jxr_linenumber" name="221" href="#221">221</a>
+<a class="jxr_linenumber" name="222" href="#222">222</a> <strong class="jxr_keyword">final</strong> AtomicInteger expectDisconnectCnt = <strong class="jxr_keyword">new</strong> AtomicInteger(0);
+<a class="jxr_linenumber" name="223" href="#223">223</a> <strong class="jxr_keyword">final</strong> <strong class="jxr_keyword">int</strong> n = ZKHelixManager.MAX_DISCONNECT_THRESHOLD;
+<a class="jxr_linenumber" name="224" href="#224">224</a> <strong class="jxr_keyword">for</strong> (<strong class="jxr_keyword">int</strong> i = 0; i < n; i++) {
+<a class="jxr_linenumber" name="225" href="#225">225</a> String oldSessionId = ZkTestHelper.getSessionId(client);
+<a class="jxr_linenumber" name="226" href="#226">226</a> ZkTestHelper.simulateZkStateDisconnected(client);
+<a class="jxr_linenumber" name="227" href="#227">227</a> expectDisconnectCnt.incrementAndGet();
+<a class="jxr_linenumber" name="228" href="#228">228</a> <em class="jxr_comment">// wait until we get invoked by zk state change to disconnected</em>
+<a class="jxr_linenumber" name="229" href="#229">229</a> TestHelper.verify(<strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/TestHelper.html">Verifier</a>() {
+<a class="jxr_linenumber" name="230" href="#230">230</a>
+<a class="jxr_linenumber" name="231" href="#231">231</a> @Override
+<a class="jxr_linenumber" name="232" href="#232">232</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> verify() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="233" href="#233">233</a> <strong class="jxr_keyword">return</strong> listener.count == expectDisconnectCnt.get();
+<a class="jxr_linenumber" name="234" href="#234">234</a> }
+<a class="jxr_linenumber" name="235" href="#235">235</a> }, 30 * 1000);
+<a class="jxr_linenumber" name="236" href="#236">236</a>
+<a class="jxr_linenumber" name="237" href="#237">237</a> String newSessionId = ZkTestHelper.getSessionId(client);
+<a class="jxr_linenumber" name="238" href="#238">238</a> Assert.assertEquals(newSessionId, oldSessionId);
+<a class="jxr_linenumber" name="239" href="#239">239</a> }
+<a class="jxr_linenumber" name="240" href="#240">240</a>
+<a class="jxr_linenumber" name="241" href="#241">241</a> <em class="jxr_comment">// make sure controller is NOT disconnected</em>
+<a class="jxr_linenumber" name="242" href="#242">242</a> LiveInstance leader = accessor.getProperty(keyBuilder.controllerLeader());
+<a class="jxr_linenumber" name="243" href="#243">243</a> Assert.assertNotNull(leader, <span class="jxr_string">"Leader should exist after "</span> + n + <span class="jxr_string">" disconnects"</span>);
+<a class="jxr_linenumber" name="244" href="#244">244</a>
+<a class="jxr_linenumber" name="245" href="#245">245</a> <em class="jxr_comment">// trigger flapping</em>
+<a class="jxr_linenumber" name="246" href="#246">246</a> ZkTestHelper.simulateZkStateDisconnected(client);
+<a class="jxr_linenumber" name="247" href="#247">247</a> <em class="jxr_comment">// wait until we get invoked by zk state change to disconnected</em>
+<a class="jxr_linenumber" name="248" href="#248">248</a> <strong class="jxr_keyword">boolean</strong> success = TestHelper.verify(<strong class="jxr_keyword">new</strong> <a href="../../../../../org/apache/helix/TestHelper.html">Verifier</a>() {
+<a class="jxr_linenumber" name="249" href="#249">249</a>
+<a class="jxr_linenumber" name="250" href="#250">250</a> @Override
+<a class="jxr_linenumber" name="251" href="#251">251</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> verify() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="252" href="#252">252</a> <strong class="jxr_keyword">return</strong> client.getShutdownTrigger();
+<a class="jxr_linenumber" name="253" href="#253">253</a> }
+<a class="jxr_linenumber" name="254" href="#254">254</a> }, 30 * 1000);
+<a class="jxr_linenumber" name="255" href="#255">255</a>
+<a class="jxr_linenumber" name="256" href="#256">256</a> Assert.assertTrue(success, <span class="jxr_string">"The "</span> + (n + 1)
+<a class="jxr_linenumber" name="257" href="#257">257</a> + <span class="jxr_string">"th disconnect event should trigger ZkHelixManager#disonnect"</span>);
+<a class="jxr_linenumber" name="258" href="#258">258</a>
+<a class="jxr_linenumber" name="259" href="#259">259</a> <em class="jxr_comment">// make sure controller is disconnected</em>
+<a class="jxr_linenumber" name="260" href="#260">260</a> success = TestHelper.verify(<strong class="jxr_keyword">new</strong> TestHelper.Verifier() {
+<a class="jxr_linenumber" name="261" href="#261">261</a>
+<a class="jxr_linenumber" name="262" href="#262">262</a> @Override
+<a class="jxr_linenumber" name="263" href="#263">263</a> <strong class="jxr_keyword">public</strong> <strong class="jxr_keyword">boolean</strong> verify() <strong class="jxr_keyword">throws</strong> Exception {
+<a class="jxr_linenumber" name="264" href="#264">264</a> LiveInstance leader = accessor.getProperty(keyBuilder.controllerLeader());
+<a class="jxr_linenumber" name="265" href="#265">265</a> <strong class="jxr_keyword">return</strong> leader == <strong class="jxr_keyword">null</strong>;
+<a class="jxr_linenumber" name="266" href="#266">266</a> }
+<a class="jxr_linenumber" name="267" href="#267">267</a> }, 5 * 1000);
+<a class="jxr_linenumber" name="268" href="#268">268</a> Assert.assertTrue(success, <span class="jxr_string">"Leader should be gone after "</span> + (n + 1) + <span class="jxr_string">" disconnects"</span>);
+<a class="jxr_linenumber" name="269" href="#269">269</a>
+<a class="jxr_linenumber" name="270" href="#270">270</a> System.out.println(<span class="jxr_string">"END "</span> + clusterName + <span class="jxr_string">" at "</span> + <strong class="jxr_keyword">new</strong> Date(System.currentTimeMillis()));
+<a class="jxr_linenumber" name="271" href="#271">271</a> }
+<a class="jxr_linenumber" name="272" href="#272">272</a> }
+</pre>
+<hr/><div id="footer">This page was automatically generated by <a href="http://maven.apache.org/">Maven</a></div></body>
+</html>
Modified: incubator/helix/site-content/xref-test/org/apache/helix/manager/zk/package-frame.html
URL: http://svn.apache.org/viewvc/incubator/helix/site-content/xref-test/org/apache/helix/manager/zk/package-frame.html?rev=1529732&r1=1529731&r2=1529732&view=diff
==============================================================================
--- incubator/helix/site-content/xref-test/org/apache/helix/manager/zk/package-frame.html (original)
+++ incubator/helix/site-content/xref-test/org/apache/helix/manager/zk/package-frame.html Mon Oct 7 03:02:52 2013
@@ -70,6 +70,9 @@
<a href="TestZkClusterManager.html" target="classFrame">TestZkClusterManager</a>
</li>
<li>
+ <a href="TestZkFlapping.html" target="classFrame">TestZkFlapping</a>
+ </li>
+ <li>
<a href="TestZkHelixAdmin.html" target="classFrame">TestZkHelixAdmin</a>
</li>
<li>
@@ -79,6 +82,9 @@
<a href="TestZkStateChangeListener.html" target="classFrame">TestZkStateChangeListener</a>
</li>
<li>
+ <a href="TestZkFlapping.html" target="classFrame">ZkStateCountListener</a>
+ </li>
+ <li>
<a href="TestZkClusterManager.html" target="classFrame">provider</a>
</li>
</ul>
Modified: incubator/helix/site-content/xref-test/org/apache/helix/manager/zk/package-summary.html
URL: http://svn.apache.org/viewvc/incubator/helix/site-content/xref-test/org/apache/helix/manager/zk/package-summary.html?rev=1529732&r1=1529731&r2=1529732&view=diff
==============================================================================
--- incubator/helix/site-content/xref-test/org/apache/helix/manager/zk/package-summary.html (original)
+++ incubator/helix/site-content/xref-test/org/apache/helix/manager/zk/package-summary.html Mon Oct 7 03:02:52 2013
@@ -127,6 +127,11 @@
</tr>
<tr>
<td>
+ <a href="TestZkFlapping.html" target="classFrame">TestZkFlapping</a>
+ </td>
+ </tr>
+ <tr>
+ <td>
<a href="TestZkHelixAdmin.html" target="classFrame">TestZkHelixAdmin</a>
</td>
</tr>
@@ -142,6 +147,11 @@
</tr>
<tr>
<td>
+ <a href="TestZkFlapping.html" target="classFrame">ZkStateCountListener</a>
+ </td>
+ </tr>
+ <tr>
+ <td>
<a href="TestZkClusterManager.html" target="classFrame">provider</a>
</td>
</tr>