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+				<li>Auto-exit of Maintenance Mode</li>
+				<li class="publishDate version-date pull-right">Last Published: 2022-05-11</li>
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+<div class="page-header">
+ <h1>Auto-exit of Maintenance Mode</h1>
+</div> 
+<section> 
+ <h2 id="Introduction">Introduction</h2> 
+ <p>Auto-exit of maintenance mode is a feature addition to Helix. It concerns a feature that allows clusters to switch out of maintenance mode automatically to save operational costs and to improve availability.</p> 
+</section> 
+<section> 
+ <h2 id="Background">Background</h2> 
+ <section> 
+  <h3 id="Maintenance_Mode">Maintenance Mode</h3> 
+  <p>The maintenance mode in Helix refers to a Helix cluster state where the Helix Controller will not trigger any type of rebalance. In short, if a cluster is in maintenance, the Controller will not bootstrap any new partitions. However, this does not mean that there won't be any (upward) state transitions. For example, partitions missing a top-state (e.g. <b>MASTER/LEADER</b>) replica will get a state transition in order to fill in the void for a top-state replica.</p> 
+  <section> 
+   <h4 id="Possible_Scenarios">Possible Scenarios</h4> 
+   <p>There are two possible conditions under which a cluster will go into maintenance mode automatically.</p> 
+   <ol style="list-style-type: decimal"> 
+    <li>There are more offline/disabled instances than ClusterConfig's <b>MAX_OFFLINE_INSTANCES_ALLOWED</b>.</li> 
+    <li>There exist instances that have more partitions than ClusterConfig's <b>MAX_PARTITIONS_PER_INSTANCE</b>.</li> 
+   </ol> 
+   <p>Difficulty in Manually Exiting Maintenance Mode</p> 
+   <p>Although maintenance mode has been designed to prevent a large-scale reshuffling of replicas when there are intermittent, transient Participant connection issues. When in maintenance, no new partitions will be bootstrapped, which will block many native operations such as creation of stores/DBs. Currently, in order to unblock, an operator must manually disable maintenance mode via Helix REST API. Since it's difficult to predict when temporary disconnects will happen, it has been a challenge to address them in a prompt manner.</p> 
+  </section> 
+ </section> 
+</section> 
+<section> 
+ <h2 id="Problem_Statement">Problem Statement</h2> 
+ <p>Currently, once clusters enter maintenance mode automatically, exiting must be done manually. This is an added human effort. We want a feature to automate this to reduce downtime and increase availability.</p> 
+</section> 
+<section> 
+ <h2 id="Architecture.2FImplementation">Architecture/Implementation</h2> 
+ <section> 
+  <h3 id="Maintenance_Recovery_Threshold">Maintenance Recovery Threshold</h3> 
+  <p>Recall that there are two cases in which a cluster may enter maintenance mode automatically:</p> 
+  <blockquote> 
+   <ol style="list-style-type: decimal"> 
+    <li>There are more offline/disabled instances than ClusterConfig's MAX_OFFLINE_INSTANCES_ALLOWED.</li> 
+    <li>There exist instances that have more partitions than ClusterConfig's MAX_PARTITIONS_PER_INSTANCE.</li> 
+   </ol> 
+  </blockquote> 
+  <p>It is important to note that we are mainly concerned with Case 1. Case 2 is meant to be a sanity check against Helix's CRUSH-ed rebalance algorithm, and this has little to do with the original motivation behind cluster maintenance mode. So, although we will <i>still</i> check against Case 2 when determining whether it is safe to exit maintenance mode, we will only address Case 1 in this section.</p> 
+  <p>With that said, it is not hard to imagine a cluster in production experiencing a flip-flop behavior around the exact value of <b>ClusterConfig's MAX_OFFLINE_INSTANCES_ALLOWED</b> field. Such behavior is undesirable and may defeat the purpose of using this feature. To mitigate it in design is to have a separate, <i>more strict</i> threshold for recovering out of maintenance mode. We therefore propose to add a new field, <b>MAINTENANCE_RECOVERY_THRESHOLD</b>. <b>MAINTENANCE_RECOVERY_THRESHOLD</b> will be defined by the user and hold a more conservative value than <b>MAX_OFFLINE_INSTANCES_ALLOWED</b> to allow for some wiggle room in deciding what value is enough to call a cluster “<i>sufficiently recovered</i>”. Additionally, we will also give users the flexibility to <i>“opt-out”</i> of the auto-exit feature by treating a <b>MAINTENANCE_RECOVERY_THRESHOLD</b> value of -1 as a disable signal.</p> 
+  <p>In short,</p> 
+  <ul> 
+   <li>If NumOfflineDisabledInstances &lt; NUM_OFFLINE_INSTANCES_FOR_AUTO_EXIT, exit maintenance mode</li> 
+   <li>NUM_OFFLINE_INSTANCES_FOR_AUTO_EXIT &lt;= MAX_OFFLINE_INSTANCES_ALLOWED</li> 
+   <li>NUM_OFFLINE_INSTANCES_FOR_AUTO_EXIT &lt; 0 or not set → Opt-out of auto-exiting of maintenance mode</li> 
+  </ul> 
+ </section> 
+ <section> 
+  <h3 id="Additional_Fields_in_MaintenanceSignal">Additional Fields in MaintenanceSignal</h3> 
+  <p>Currently, Helix stores the maintenance signal in /{CLUSTER_NAME}/CONTROLLER/MAINTENANCE. A sample maintenance signal ZNode will look like the following:</p> 
+  <div class="source"> 
+   <pre><code class="language-json">{
+  "id" : "maintenance",
+  "simpleFields" : {
+    "REASON" : "Offline Instances count 5 greater than allowed count 4. Stop rebalance and put the cluster CLUSTER_TestClusterInMaintenanceModeWhenReachingOfflineInstancesLimit into maintenance mode.",
+    "TRIGGERED_BY" : "CONTROLLER",
+    "TIMESTAMP" : "12312838831***",
+    // The following are sample user-defined fields from the REST call payload //
+    "id" : "hulee",
+    "jira" : "HELIX-123",
+    "cluster" : "testCluster"
+  },
+  "listFields" : {
+  },
+  "mapFields" : {
+  }
+}
+</code></pre> 
+  </div> 
+  <p>A simpleField will be newly added (notice the “<b>TRIGGERED_BY</b>” field) to denote whether the current maintenance signal has been generated automatically by the Controller. There will initially be <b>two</b> possible entries for this field:</p> 
+  <ul> 
+   <li><b>CONTROLLER</b></li> 
+   <li><b>USER</b></li> 
+  </ul> 
+  <p>Also, the TIMESTAMP field will be added so that the value could be retrieved via REST.</p> 
+  <p>In addition, we will allow addition of custom fields in simpleFields. See the example above. Users will be able to add these fields by using the REST endpoints that will be provided when <b>enabling</b> the maintenance mode. Note that when disabling maintenance mode, these fields will no longer be available because disabling maintenance mode will remove the maintenance signal altogether.</p> 
+ </section> 
+ <section> 
+  <h3 id="Recording_Maintenance_History">Recording Maintenance History</h3> 
+  <p>Currently, Helix maintains the controller history in the /{clusterName}/CONTROLLER/HISTORY ZNode. We plan to add a history for maintenance mode. This way, users will be able to access the history in ZooKeeper directly, or utilize the REST endpoint for viewing. The format will be in a human-readable format like the following (this is how Helix maintains the Controller leader history):</p> 
+  <div class="source"> 
+   <pre><code class="language-java">long currentTime = System.currentTimeMillis();
+DateFormat df = new SimpleDateFormat("yyyy-MM-dd-HH:mm:ss");
+df.setTimeZone(TimeZone.getTimeZone("UTC"));
+String dateTime = df.format(new Date(currentTime));
+</code></pre> 
+  </div> 
+  <p>Note that Helix only records <i>10 most recent</i> changes in the HISTORY ZNode. We will follow a similar protocol for persisting maintenance mode-related history. Note that <b>all changes around maintenance mode will be recorded</b> (both entering and exiting of the mode).</p> 
+ </section> 
+ <section> 
+  <h3 id="Backward_Compatibility">Backward Compatibility</h3> 
+  <p>Old versions of Helix Controllers will not refer to the newly-added fields, in which case they will simply lack the auto-exit functionality.</p> 
+ </section> 
+ <section> 
+  <h3 id="Asynchronous_Processing">Asynchronous Processing</h3> 
+  <p>Note that in order for a cluster to exit maintenance mode, the Controller must check against <i>all conditions</i> that are outlined above. That is, it needs to make sure <b>1) the total count of offline/disabled instances is less than the threshold and that 2) there are no instances with more partitions than the threshold</b>. Checking against Condition 2 requires traversing all resources' states, which could be costly in clusters of large scale. From this, we potentially risk adding a significant latency to the pipeline, which is undesirable because it could cause problems regarding availability (for example, longer pipeline runs may exacerbate the rate at which ZooKeeper Event Callbacks accumulate. Helix currently deals with a large number of ZK Event Callbacks by re-booting the Controller, which could nick Helix's as well as applications' availability numbers).</p> 
+  <p>For this reason, we will make the checks happen asynchronously. Additional tweak may be required to ensure that the maintenance signal is cached appropriately through each run of the pipeline to avoid the race condition.</p> 
+ </section> 
+ <section> 
+  <h3 id="Periodic_Check_on_Cluster_Recovery_Status">Periodic Check on Cluster Recovery Status</h3> 
+  <p>Auto-exit is inherently triggered as part of Helix's rebalance pipeline; that is, if there is no rebalance triggered, there wouldn't be any auto-exits triggered either. In theory, this is a non-issue because whether a cluster goes into or recovers out of maintenance mode is determined by changes around LiveInstances, and a LiveInstance change is an event that triggers Helix's rebalance pipeline.</p> 
+  <p>Regardless, there has been anecdotal reports where such events seemed to have been “swallowed” or “disappeared” - if that is true for any reason (mostly a ZK callback queue issue), one way to mitigate it is to enable periodically-triggered rebalances. Note that this is actually a feature <i>already supported</i> by Helix.</p> 
+ </section> 
+</section> 
+<section> 
+ <h2 id="How_to_Use_the_Auto-Exit_Feature">How to Use the Auto-Exit Feature</h2> 
+ <section> 
+  <h3 id="Why_Use_Auto-Exit">Why Use Auto-Exit</h3> 
+  <p>Helix is used to manage resources in distributed clusters; therefore, it inevitably gets to have hundreds of instances. With so many clusters and traffic to the ZooKeeper, Helix's metadata store, there are cases in which some Participants in the cluster experience transient connection failure, which may cause Helix to respond to each little change that happens to the cluster. For users of stateful systems, this may be undesirable, so they opt to set a config for entering maintenance mode automatically. Maintenance mode is a temporary mode that the cluster can enter in order to ensure that there are no bootstrapping state transitions on instances.</p> 
+  <p>However, no bootstrapping state transitions could mean that some operations such as addition of resources would be halted, which causes periods of unavailability. It was the cluster operator's responsibility to determine whether the given cluster has sufficiently recovered enough to exit maintenance mode. The auto-exit feature removes such overhead.</p> 
+ </section> 
+ <section> 
+  <h3 id="Guide">Guide</h3> 
+  <p>First, we encourage all users of this feature to understand Helix's workflow below:</p> 
+  <p><img src="./images/auto-exit-maintenance.jpg" alt="Intro"></p> 
+  <p>In order to use this feature, you'd need to set the following config parameters in your cluster's ClusterConfig.</p> 
+  <section> 
+   <h4 id="Auto-enter_maintenance_mode">Auto-enter maintenance mode</h4> 
+   <p><b>MAX_OFFLINE_INSTANCES_ALLOWED</b>: the number of offline and disabled instances allowed before the cluster automatically enters maintenance mode.</p> 
+   <p><b>MAX_PARTITIONS_PER_INSTANCE</b>: the number of partitions on any given instance, where, if any instance in the cluster happens to have more partitions than this number, the cluster automatically enters maintenance mode</p> 
+  </section> 
+  <section> 
+   <h4 id="Auto-exit_maintenance_mode">Auto-exit maintenance mode</h4> 
+   <p><b>NUM_OFFLINE_INSTANCES_FOR_AUTO_EXIT</b>: set this value to allow your cluster to auto-exit when the number of offline and disabled instances are at this value. Note that this value must be less than MAX_OFFLINE_INSTANCES_ALLOWED (Read the design above on why). Note that the appropriate value for this is dependent on the characteristics of the cluster. In general, start with 1, meaning that the cluster will only auto-exit maintenance mode when it is down to 1 offline or disable instance, and increase the value as you increase tolerance.</p> 
+   <p>Note that the cluster will auto-exit only if it has <i>automatically</i> entered maintenance mode previously.</p> 
+  </section> 
+ </section> 
+</section> 
+<section> 
+ <h2 id="FAQ">FAQ</h2> 
+ <section> 
+  <section> 
+   <h4 id="How_is_this_related_to_DelayedAutoRebalancer.3F">How is this related to <b>DelayedAutoRebalancer</b>?</h4> 
+   <ul> 
+    <li>If you are using DelayedAutoRebalancer for your clusters, this auto-exit feature would still work as expected. Fundamentally, DelayedAutoRebalancer and maintenance mode are mutually independent. That is, under maintenance mode, Helix uses a different rebalancing strategy. Once the cluster auto-exits maintenance mode, it will go back to whichever rebalancing mode it was on previously.</li> 
+    <li>Delayed Partition Movement is a feature in Helix's FULL-AUTO rebalancer.</li> 
+    <li>The rebalance delay will work at the instance level and entering/exiting maintenance mode will not affect the time at which the delay-counting started.</li> 
+   </ul> 
+  </section> 
+  <section> 
+   <h4 id="How_do_I_know_what_the_appropriate_value_is_for_MAINTENANCE_RECOVERY_THRESHOLD.3F">How do I know what the appropriate value is for <b><b>MAINTENANCE_RECOVERY_THRESHOLD</b></b>?</h4> 
+   <ul> 
+    <li>As a framework, we cannot provide the right value for this threshold. It should depend on the nature of the application and the risk tolerance thereof. Familiarize yourself with the rules outlined above and start with a low value (for example, 0) and increase your tolerance.</li> 
+   </ul> 
+  </section> 
+ </section> 
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\ No newline at end of file

Added: helix/site-content/1.0.5-docs/css/bootstrap-responsive.min.css
URL: http://svn.apache.org/viewvc/helix/site-content/1.0.5-docs/css/bootstrap-responsive.min.css?rev=1900823&view=auto
==============================================================================
--- helix/site-content/1.0.5-docs/css/bootstrap-responsive.min.css (added)
+++ helix/site-content/1.0.5-docs/css/bootstrap-responsive.min.css Thu May 12 05:29:03 2022
@@ -0,0 +1,9 @@
+/*!
+ * Bootstrap Responsive v2.2.2
+ *
+ * Copyright 2012 Twitter, Inc
+ * Licensed under the Apache License v2.0
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Designed and built with all the love in the world @twitter by @mdo and @fat.
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\ No newline at end of file

Added: helix/site-content/1.0.5-docs/css/bootstrap.min.css
URL: http://svn.apache.org/viewvc/helix/site-content/1.0.5-docs/css/bootstrap.min.css?rev=1900823&view=auto
==============================================================================
--- helix/site-content/1.0.5-docs/css/bootstrap.min.css (added)
+++ helix/site-content/1.0.5-docs/css/bootstrap.min.css Thu May 12 05:29:03 2022
@@ -0,0 +1,9 @@
+/*!
+ * Bootstrap v2.2.2
+ *
+ * Copyright 2012 Twitter, Inc
+ * Licensed under the Apache License v2.0
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Designed and built with all the love in the world @twitter by @mdo and @fat.

[... 3 lines stripped ...]
Added: helix/site-content/1.0.5-docs/css/bootswatch.css
URL: http://svn.apache.org/viewvc/helix/site-content/1.0.5-docs/css/bootswatch.css?rev=1900823&view=auto
==============================================================================
--- helix/site-content/1.0.5-docs/css/bootswatch.css (added)
+++ helix/site-content/1.0.5-docs/css/bootswatch.css Thu May 12 05:29:03 2022
@@ -0,0 +1,70 @@
+body {
+  padding-top: 80px;
+  padding-bottom: 20px;
+}
+
+.navbar a > i {
+  opacity: 0.5;
+}
+
+.navbar a:hover > i {
+  opacity: 1;
+}
+
+.subhead {
+  padding-bottom: 0;
+  margin-bottom: 9px;
+}
+
+.subhead h1 {
+  font-size: 54px;
+}
+
+
+@media (max-width: 480px) {
+
+  .modal {
+    position: fixed !important;
+    top: 25% !important;
+  }
+}
+
+
+@media (max-width: 767px) {
+
+  body {
+    padding-top: 0;
+  }
+}
+
+/* Portrait tablet to landscape and desktop */
+@media (min-width: 768px) and (max-width: 979px) {
+
+  .thumbnail p {
+    font-size: 12px;
+  }
+
+  .thumbnail .btn {
+    padding: 8px 12px;
+    font-size: 12px;
+  }
+}
+
+@media (min-width: 768px) and (max-width: 979px) {
+
+  /* Remove any padding from the body */
+  body {
+    padding-top: 0;
+  }
+}
+
+@media (max-width: 980px) {
+
+  /* Unfloat brand */
+  .navbar-fixed-top .brand {
+    float: left;
+    margin-left: 0;
+    padding-left: 10px;
+    padding-right: 10px;
+  }
+}
\ No newline at end of file

Added: helix/site-content/1.0.5-docs/css/docs.css
URL: http://svn.apache.org/viewvc/helix/site-content/1.0.5-docs/css/docs.css?rev=1900823&view=auto
==============================================================================
--- helix/site-content/1.0.5-docs/css/docs.css (added)
+++ helix/site-content/1.0.5-docs/css/docs.css Thu May 12 05:29:03 2022
@@ -0,0 +1,150 @@
+/* Add additional stylesheets below
+-------------------------------------------------- */
+/*
+  Bootstrap's documentation styles
+  Special styles for presenting Bootstrap's documentation and examples
+*/
+
+/* Body and structure
+-------------------------------------------------- */
+
+body {
+  position: relative;
+  padding-top: 40px;
+}
+
+/* Code in headings */
+h3 code {
+  font-size: 14px;
+  font-weight: normal;
+}
+
+/* Jumbotrons
+-------------------------------------------------- */
+.jumbotron {
+  position: relative;
+  padding: 40px 0;
+}
+.jumbotron h1 {
+  font-size: 80px;
+  font-weight: bold;
+  letter-spacing: -1px;
+  line-height: 1;
+}
+.jumbotron p {
+  font-size: 24px;
+  font-weight: 300;
+  line-height: 30px;
+  margin-bottom: 30px;
+}
+.jumbotron .btn-large {
+  font-size: 20px;
+  font-weight: normal;
+  padding: 14px 24px;
+  margin-right: 10px;
+  -webkit-border-radius: 6px;
+     -moz-border-radius: 6px;
+          border-radius: 6px;
+}
+.jumbotron .btn-large small {
+  font-size: 14px;
+}
+
+
+/* Specific jumbotrons
+------------------------- */
+/* supporting docs pages */
+.subhead {
+  padding-bottom: 0;
+  margin-bottom: 9px;
+}
+.subhead h1 {
+  font-size: 54px;
+}
+
+/* Responsive Docs
+-------------------------------------------------- */
+@media (max-width: 480px) {
+
+  /* Reduce padding above jumbotron */
+  body {
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Added: helix/site-content/1.0.5-docs/css/lightbox.css
URL: http://svn.apache.org/viewvc/helix/site-content/1.0.5-docs/css/lightbox.css?rev=1900823&view=auto
==============================================================================
--- helix/site-content/1.0.5-docs/css/lightbox.css (added)
+++ helix/site-content/1.0.5-docs/css/lightbox.css Thu May 12 05:29:03 2022
@@ -0,0 +1,210 @@
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+}
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+}
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+}
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+}
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Added: helix/site-content/1.0.5-docs/css/print.css
URL: http://svn.apache.org/viewvc/helix/site-content/1.0.5-docs/css/print.css?rev=1900823&view=auto
==============================================================================
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+}
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+thead {
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+}
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Added: helix/site-content/1.0.5-docs/css/reflow-skin.css
URL: http://svn.apache.org/viewvc/helix/site-content/1.0.5-docs/css/reflow-skin.css?rev=1900823&view=auto
==============================================================================
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+h6[id]:before,
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+}
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+}
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+}
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+}
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+	text-decoration: inherit;
+}
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+}
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+}
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Added: helix/site-content/1.0.5-docs/css/site.css
URL: http://svn.apache.org/viewvc/helix/site-content/1.0.5-docs/css/site.css?rev=1900823&view=auto
==============================================================================
--- helix/site-content/1.0.5-docs/css/site.css (added)
+++ helix/site-content/1.0.5-docs/css/site.css Thu May 12 05:29:03 2022
@@ -0,0 +1 @@
+/* You can override this file with your own styles */
\ No newline at end of file

Added: helix/site-content/1.0.5-docs/dependencies.html
URL: http://svn.apache.org/viewvc/helix/site-content/1.0.5-docs/dependencies.html?rev=1900823&view=auto
==============================================================================
--- helix/site-content/1.0.5-docs/dependencies.html (added)
+++ helix/site-content/1.0.5-docs/dependencies.html Thu May 12 05:29:03 2022
@@ -0,0 +1,701 @@
+
+<!DOCTYPE html>
+
+
+
+
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+
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+-->
+<html  xml:lang="en" lang="en">
+
+	<head>
+		<meta charset="UTF-8" />
+		<title>Apache Helix &#x2013; Project Dependencies</title>
+		<meta name="viewport" content="width=device-width, initial-scale=1.0" />
+		<meta name="description" content="" />
+		<meta http-equiv="content-language" content="en" />
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+		<link href="./css/bootstrap.min.css" rel="stylesheet" />
+		<link href="./css/bootstrap-responsive.min.css" rel="stylesheet" />
+		<link href="./css/docs.css" rel="stylesheet" />
+		<link href="./css/reflow-skin.css" rel="stylesheet" />
+
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+		<link href="./css/lightbox.css" rel="stylesheet" />
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+		<link href="./css/site.css" rel="stylesheet" />
+		<link href="./css/print.css" rel="stylesheet" media="print" />
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+
+	<body class="page-dependencies project-105-docs" data-spy="scroll" data-offset="60" data-target="#toc-scroll-target">
+
+    
+		<div class="navbar navbar-fixed-top">
+			<div class="navbar-inner">
+				<div class="container">
+					<a class="btn btn-navbar" data-toggle="collapse" data-target="#top-nav-collapse">
+						<span class="icon-bar"></span>
+						<span class="icon-bar"></span>
+						<span class="icon-bar"></span>
+					</a>
+					<a class="brand" href="http://helix.apache.org">Apache Helix</a>
+					<div class="nav-collapse collapse" id="top-nav-collapse">
+						<ul class="nav pull-right">
+							<li ><a href="index.html" title="Helix 1.0.4">Helix 1.0.4</a></li>
+							<li class="dropdown">
+								<a href="#" class="dropdown-toggle" data-toggle="dropdown">Get Helix <b class="caret"></b></a>
+								<ul class="dropdown-menu">
+									<li ><a href="download.html" title="Download">Download</a></li>
+									<li ><a href="Building.html" title="Building">Building</a></li>
+									<li ><a href="releasenotes/release-1.0.4.html" title="Release Notes">Release Notes</a></li>
+								</ul>
+							</li>
+							<li class="dropdown">
+								<a href="#" class="dropdown-toggle" data-toggle="dropdown">Hands-On <b class="caret"></b></a>
+								<ul class="dropdown-menu">
+									<li ><a href="Quickstart.html" title="Quick Start">Quick Start</a></li>
+									<li ><a href="Tutorial.html" title="Tutorial">Tutorial</a></li>
+									<li ><a href="../javadocs/1.0.4" title="Javadocs">Javadocs</a></li>
+								</ul>
+							</li>
+							<li class="dropdown">
+								<a href="#" class="dropdown-toggle" data-toggle="dropdown">Recipes <b class="caret"></b></a>
+								<ul class="dropdown-menu">
+									<li ><a href="recipes/lock_manager.html" title="Distributed lock manager">Distributed lock manager</a></li>
+									<li ><a href="recipes/rabbitmq_consumer_group.html" title="Rabbit MQ consumer group">Rabbit MQ consumer group</a></li>
+									<li ><a href="recipes/rsync_replicated_file_store.html" title="Rsync replicated file store">Rsync replicated file store</a></li>
+									<li ><a href="recipes/service_discovery.html" title="Service discovery">Service discovery</a></li>
+									<li ><a href="recipes/task_dag_execution.html" title="Distributed task DAG execution">Distributed task DAG execution</a></li>
+								</ul>
+							</li>
+						</ul>
+					</div><!--/.nav-collapse -->
+				</div>
+			</div>
+		</div>
+
+	<div class="container">
+
+	<!-- Masthead
+	================================================== -->
+
+	<header>
+	<div class="jumbotron subhead">
+		<div class="row" id="banner">
+			<div class="span12">
+				<div class="pull-left">
+					<a href="http://helix.apache.org/" id="bannerLeft"><img src="../images/helix-logo.jpg" alt='"''"' /></a>
+					<p class="lead">A cluster management framework for partitioned and replicated distributed resources</p>
+				</div>
+				<div class="pull-right">
+					<a href="http://www.apache.org/" id="bannerRight"><img src="../images/feather_small.gif" alt='"''"' /></a>
+				</div>
+			</div>
+		</div>
+	</div>
+		<div>
+			<ul class="breadcrumb">
+				<li><a href="http://helix.apache.org/" title="Apache Helix" class="externalLink">Apache Helix</a></li>
+				<li class="divider">/</li>
+				<li><a href="../" title="Apache Helix">Apache Helix</a></li>
+				<li class="divider">/</li>
+				<li><a href="../1.0.4-docs/" title="Release 1.0.4">Release 1.0.4</a></li>
+				<li class="divider">/</li>
+				<li>Project Dependencies</li>
+				<li class="publishDate version-date pull-right">Last Published: 2022-05-11</li>
+			</ul>
+		</div>
+	</header>
+
+	<div class="main-body">
+	<div class="row">
+		<div class="span12">
+			<div class="body-content">
+<a name="Project_Dependencies"></a> 
+<section> 
+ <div class="page-header">
+  <h2 id="Project_Dependencies">Project Dependencies</h2>
+ </div><a name="Project_Dependencies_compile"></a> 
+ <section> 
+  <h3 id="compile">compile</h3> 
+  <p>The following is a list of compile dependencies for this project. These dependencies are required to compile and run the application:</p> 
+  <table border="0" class="bodyTable table table-striped table-hover"> 
+   <tbody> 
+    <tr class="a"> 
+     <th>GroupId</th> 
+     <th>ArtifactId</th> 
+     <th>Version</th> 
+     <th>Type</th> 
+     <th>Licenses</th> 
+    </tr> 
+    <tr class="b"> 
+     <td align="left">org.testng</td> 
+     <td><a class="externalLink" href="http://testng.org">testng</a></td> 
+     <td>6.0.1</td> 
+     <td>jar</td> 
+     <td><a class="externalLink" href="http://apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a></td> 
+    </tr> 
+   </tbody> 
+  </table> 
+ </section> 
+</section><a name="Project_Transitive_Dependencies"></a> 
+<section> 
+ <h2 id="Project_Transitive_Dependencies">Project Transitive Dependencies</h2> 
+ <p>The following is a list of transitive dependencies for this project. Transitive dependencies are the dependencies of the project dependencies.</p><a name="Project_Transitive_Dependencies_compile"></a> 
+ <section> 
+  <h3 id="compile">compile</h3> 
+  <p>The following is a list of compile dependencies for this project. These dependencies are required to compile and run the application:</p> 
+  <table border="0" class="bodyTable table table-striped table-hover"> 
+   <tbody> 
+    <tr class="a"> 
+     <th>GroupId</th> 
+     <th>ArtifactId</th> 
+     <th>Version</th> 
+     <th>Type</th> 
+     <th>Licenses</th> 
+    </tr> 
+    <tr class="b"> 
+     <td align="left">com.beust</td> 
+     <td><a class="externalLink" href="http://beust.com/jcommander">jcommander</a></td> 
+     <td>1.12</td> 
+     <td>jar</td> 
+     <td><a class="externalLink" href="http://www.apache.org/licenses/LICENSE-2.0.txt">The Apache Software License, Version 2.0</a></td> 
+    </tr> 
+    <tr class="a"> 
+     <td align="left">org.beanshell</td> 
+     <td>bsh</td> 
+     <td>2.0b4</td> 
+     <td>jar</td> 
+     <td><a class="externalLink" href="http://www.gnu.org/licenses/lgpl.txt">GNU LESSER GENERAL PUBLIC LICENSE</a></td> 
+    </tr> 
+    <tr class="b"> 
+     <td align="left">org.yaml</td> 
+     <td><a class="externalLink" href="http://code.google.com/p/snakeyaml/">snakeyaml</a></td> 
+     <td>1.6</td> 
+     <td>jar</td> 
+     <td>LICENSE.txt</td> 
+    </tr> 
+   </tbody> 
+  </table> 
+ </section><a name="Project_Transitive_Dependencies_test"></a> 
+ <section> 
+  <h3 id="test">test</h3> 
+  <p>The following is a list of test dependencies for this project. These dependencies are only required to compile and run unit tests for the application:</p> 
+  <table border="0" class="bodyTable table table-striped table-hover"> 
+   <tbody> 
+    <tr class="a"> 
+     <th>GroupId</th> 
+     <th>ArtifactId</th> 
+     <th>Version</th> 
+     <th>Type</th> 
+     <th>Licenses</th> 
+    </tr> 
+    <tr class="b"> 
+     <td align="left">junit</td> 
+     <td><a class="externalLink" href="http://junit.org">junit</a></td> 
+     <td>4.11</td> 
+     <td>jar</td> 
+     <td><a class="externalLink" href="http://www.opensource.org/licenses/cpl1.0.txt">Common Public License Version 1.0</a></td> 
+    </tr> 
+    <tr class="a"> 
+     <td align="left">org.hamcrest</td> 
+     <td><a class="externalLink" href="https://github.com/hamcrest/JavaHamcrest/hamcrest-core">hamcrest-core</a></td> 
+     <td>1.3</td> 
+     <td>jar</td> 
+     <td><a class="externalLink" href="http://www.opensource.org/licenses/bsd-license.php">New BSD License</a></td> 
+    </tr> 
+   </tbody> 
+  </table> 
+ </section> 
+</section><a name="Project_Dependency_Graph"></a> 
+<section> 
+ <h2 id="Project_Dependency_Graph">Project Dependency Graph</h2> 
+ <script language="javascript" type="text/javascript">
+      function toggleDependencyDetails( divId, imgId )
+      {
+        var div = document.getElementById( divId );
+        var img = document.getElementById( imgId );
+        if( div.style.display == '' )
+        {
+          div.style.display = 'none';
+          img.src='./images/icon_info_sml.gif';
+          img.alt='[Information]';
+        }
+        else
+        {
+          div.style.display = '';
+          img.src='./images/close.gif';
+          img.alt='[Close]';
+        }
+      }
+</script> <a name="Dependency_Tree"></a> 
+ <section> 
+  <h3 id="Dependency_Tree">Dependency Tree</h3> 
+  <ul> 
+   <li>org.apache.helix:1.0.5-docs:bundle:1.0.5-SNAPSHOT <button title="Information" class="btn btn-link btn-small" type="button" data-toggle="collapse" data-target="#_dep0"><i class="icon-info-sign"></i></button> 
+    <div id="_dep0" style="" class="collapse"> 
+     <table border="0" class="bodyTable table table-striped table-hover"> 
+      <tbody> 
+       <tr class="a"> 
+        <th>Apache Helix :: Website :: 1.0.5</th> 
+       </tr> 
+       <tr class="b"> 
+        <td> <p><b>Description: </b>Helix is a generic cluster management framework used for the automatic management of partitioned, replicated and distributed resources hosted on a cluster of nodes.</p> <p><b>URL: </b><a class="externalLink" href="https://helix.apache.org/1.0.5-docs">https://helix.apache.org/1.0.5-docs</a></p> <p><b>Project Licenses: </b><a class="externalLink" href="https://www.apache.org/licenses/LICENSE-2.0.txt">Apache License, Version 2.0</a></p></td> 
+       </tr> 
+      </tbody> 
+     </table> 
+    </div> 
+    <ul> 
+     <li>org.testng:testng:jar:6.0.1 (compile) <button title="Information" class="btn btn-link btn-small" type="button" data-toggle="collapse" data-target="#_dep2"><i class="icon-info-sign"></i></button> 
+      <div id="_dep2" style="" class="collapse"> 
+       <table border="0" class="bodyTable table table-striped table-hover"> 
+        <tbody> 
+         <tr class="a"> 
+          <th>TestNG</th> 
+         </tr> 
+         <tr class="b"> 
+          <td> <p><b>Description: </b>TestNG is a testing framework.</p> <p><b>URL: </b><a class="externalLink" href="http://testng.org">http://testng.org</a></p> <p><b>Project Licenses: </b><a class="externalLink" href="http://apache.org/licenses/LICENSE-2.0">Apache License, Version 2.0</a></p></td> 
+         </tr> 
+        </tbody> 
+       </table> 
+      </div> 
+      <ul> 
+       <li>junit:junit:jar:4.11 (test) <button title="Information" class="btn btn-link btn-small" type="button" data-toggle="collapse" data-target="#_dep4"><i class="icon-info-sign"></i></button> 
+        <div id="_dep4" style="" class="collapse"> 
+         <table border="0" class="bodyTable table table-striped table-hover"> 
+          <tbody> 
+           <tr class="a"> 
+            <th>JUnit</th> 
+           </tr> 
+           <tr class="b"> 
+            <td> <p><b>Description: </b>JUnit is a regression testing framework written by Erich Gamma and Kent Beck. It is used by the developer who implements unit tests in Java.</p> <p><b>URL: </b><a class="externalLink" href="http://junit.org">http://junit.org</a></p> <p><b>Project Licenses: </b><a class="externalLink" href="http://www.opensource.org/licenses/cpl1.0.txt">Common Public License Version 1.0</a></p></td> 
+           </tr> 
+          </tbody> 
+         </table> 
+        </div> 
+        <ul> 
+         <li>org.hamcrest:hamcrest-core:jar:1.3 (test) <button title="Information" class="btn btn-link btn-small" type="button" data-toggle="collapse" data-target="#_dep6"><i class="icon-info-sign"></i></button> 
+          <div id="_dep6" style="" class="collapse"> 
+           <table border="0" class="bodyTable table table-striped table-hover"> 
+            <tbody> 
+             <tr class="a"> 
+              <th>Hamcrest Core</th> 
+             </tr> 
+             <tr class="b"> 
+              <td> <p><b>Description: </b>This is the core API of hamcrest matcher framework to be used by third-party framework providers. This includes the a foundation set of matcher implementations for common operations.</p> <p><b>URL: </b><a class="externalLink" href="https://github.com/hamcrest/JavaHamcrest/hamcrest-core">https://github.com/hamcrest/JavaHamcrest/hamcrest-core</a></p> <p><b>Project Licenses: </b><a class="externalLink" href="http://www.opensource.org/licenses/bsd-license.php">New BSD License</a></p></td> 
+             </tr> 
+            </tbody> 
+           </table> 
+          </div></li> 
+        </ul></li> 
+       <li>org.beanshell:bsh:jar:2.0b4 (compile) <button title="Information" class="btn btn-link btn-small" type="button" data-toggle="collapse" data-target="#_dep8"><i class="icon-info-sign"></i></button> 
+        <div id="_dep8" style="" class="collapse"> 
+         <table border="0" class="bodyTable table table-striped table-hover"> 
+          <tbody> 
+           <tr class="a"> 
+            <th>BeanShell</th> 
+           </tr> 
+           <tr class="b"> 
+            <td> <p><b>Description: </b>BeanShell</p> <p><b>Project Licenses: </b><a class="externalLink" href="http://www.gnu.org/licenses/lgpl.txt">GNU LESSER GENERAL PUBLIC LICENSE</a></p></td> 
+           </tr> 
+          </tbody> 
+         </table> 
+        </div></li> 
+       <li>com.beust:jcommander:jar:1.12 (compile) <button title="Information" class="btn btn-link btn-small" type="button" data-toggle="collapse" data-target="#_dep10"><i class="icon-info-sign"></i></button> 
+        <div id="_dep10" style="" class="collapse"> 
+         <table border="0" class="bodyTable table table-striped table-hover"> 
+          <tbody> 
+           <tr class="a"> 
+            <th>JCommander</th> 
+           </tr> 
+           <tr class="b"> 
+            <td> <p><b>Description: </b>A Java framework to parse command line options with annotations.</p> <p><b>URL: </b><a class="externalLink" href="http://beust.com/jcommander">http://beust.com/jcommander</a></p> <p><b>Project Licenses: </b><a class="externalLink" href="http://www.apache.org/licenses/LICENSE-2.0.txt">The Apache Software License, Version 2.0</a></p></td> 
+           </tr> 
+          </tbody> 
+         </table> 
+        </div></li> 
+       <li>org.yaml:snakeyaml:jar:1.6 (compile) <button title="Information" class="btn btn-link btn-small" type="button" data-toggle="collapse" data-target="#_dep12"><i class="icon-info-sign"></i></button> 
+        <div id="_dep12" style="" class="collapse"> 
+         <table border="0" class="bodyTable table table-striped table-hover"> 
+          <tbody> 
+           <tr class="a"> 
+            <th>SnakeYAML</th> 
+           </tr> 
+           <tr class="b"> 
+            <td> <p><b>Description: </b>YAML 1.1 parser and emitter for Java</p> <p><b>URL: </b><a class="externalLink" href="http://code.google.com/p/snakeyaml/">http://code.google.com/p/snakeyaml/</a></p> <p><b>Project Licenses: </b><a href="LICENSE.txt">Apache License Version 2.0</a></p></td> 
+           </tr> 
+          </tbody> 
+         </table> 
+        </div></li> 
+      </ul></li> 
+    </ul></li> 
+  </ul> 
+ </section> 
+</section><a name="Licenses"></a> 
+<section> 
+ <h2 id="Licenses">Licenses</h2> 
+ <p><b>Apache License Version 2.0: </b>SnakeYAML</p> 
+ <p><b>GNU LESSER GENERAL PUBLIC LICENSE: </b>BeanShell</p> 
+ <p><b>Apache License, Version 2.0: </b>Apache Helix :: Website :: 1.0.5, TestNG</p> 
+ <p><b>New BSD License: </b>Hamcrest Core</p> 
+ <p><b>Common Public License Version 1.0: </b>JUnit</p> 
+ <p><b>The Apache Software License, Version 2.0: </b>JCommander</p> 
+</section><a name="Dependency_File_Details"></a> 
+<section> 
+ <h2 id="Dependency_File_Details">Dependency File Details</h2> 
+ <table border="0" class="bodyTable table table-striped table-hover"> 
+  <tbody> 
+   <tr class="a"> 
+    <th>Filename</th> 
+    <th>Size</th> 
+    <th>Entries</th> 
+    <th>Classes</th> 
+    <th>Packages</th> 
+    <th>Java Version</th> 
+    <th title="Indicates whether these dependencies have been compiled with debug information.">Debug Information</th> 
+   </tr> 
+   <tr class="b"> 
+    <td align="left">jcommander-1.12.jar</td> 
+    <td align="right">31.3 kB</td> 
+    <td align="right">36</td> 
+    <td align="right">23</td> 
+    <td align="right">4</td> 
+    <td align="center">1.5</td> 
+    <td align="center">Yes</td> 
+   </tr> 
+   <tr class="a"> 
+    <td align="left">junit-4.11.jar</td> 
+    <td align="right">245 kB</td> 
+    <td align="right">266</td> 
+    <td align="right">233</td> 
+    <td align="right">28</td> 
+    <td align="center">1.5</td> 
+    <td align="center">Yes</td> 
+   </tr> 
+   <tr class="b"> 
+    <td align="left">bsh-2.0b4.jar</td> 
+    <td align="right">281.7 kB</td> 
+    <td align="right">238</td> 
+    <td align="right">158</td> 
+    <td align="right">8</td> 
+    <td align="center">1.2</td> 
+    <td align="center">No</td> 
+   </tr> 
+   <tr class="a"> 
+    <td align="left">hamcrest-core-1.3.jar</td> 
+    <td align="right">45 kB</td> 
+    <td align="right">52</td> 
+    <td align="right">45</td> 
+    <td align="right">3</td> 
+    <td align="center">1.5</td> 
+    <td align="center">Yes</td> 
+   </tr> 
+   <tr class="b"> 
+    <td align="left">testng-6.0.1.jar</td> 
+    <td align="right">582.3 kB</td> 
+    <td align="right">400</td> 
+    <td align="right">365</td> 
+    <td align="right">22</td> 
+    <td align="center">1.5</td> 
+    <td align="center">Yes</td> 
+   </tr> 
+   <tr class="a"> 
+    <td align="left">snakeyaml-1.6.jar</td> 
+    <td align="right">232.1 kB</td> 
+    <td align="right">208</td> 
+    <td align="right">183</td> 
+    <td align="right">16</td> 
+    <td align="center">1.5</td> 
+    <td align="center">Yes</td> 
+   </tr> 
+   <tr class="b"> 
+    <th>Total</th> 
+    <th>Size</th> 
+    <th>Entries</th> 
+    <th>Classes</th> 
+    <th>Packages</th> 
+    <th>Java Version</th> 
+    <th>Debug Information</th> 
+   </tr> 
+   <tr class="a"> 
+    <td align="right">6</td> 
+    <td align="right">1.4 MB</td> 
+    <td align="right">1200</td> 
+    <td align="right">1007</td> 
+    <td align="right">81</td> 
+    <td align="center">1.5</td> 
+    <td align="right">5</td> 
+   </tr> 
+   <tr class="b"> 
+    <td align="right">compile: 4</td> 
+    <td align="right">compile: 1.1 MB</td> 
+    <td align="right">compile: 882</td> 
+    <td align="right">compile: 729</td> 
+    <td align="right">compile: 50</td> 
+    <td align="center">-</td> 
+    <td align="right">compile: 3</td> 
+   </tr> 
+   <tr class="a"> 
+    <td align="right">test: 2</td> 
+    <td align="right">test: 290.1 kB</td> 
+    <td align="right">test: 318</td> 
+    <td align="right">test: 278</td> 
+    <td align="right">test: 31</td> 
+    <td align="center">-</td> 
+    <td align="right">test: 2</td> 
+   </tr> 
+  </tbody> 
+ </table> 
+</section><a name="Dependency_Repository_Locations"></a> 
+<section> 
+ <h2 id="Dependency_Repository_Locations">Dependency Repository Locations</h2> 
+ <table border="0" class="bodyTable table table-striped table-hover"> 
+  <tbody> 
+   <tr class="a"> 
+    <th>Repo ID</th> 
+    <th>URL</th> 
+    <th>Release</th> 
+    <th>Snapshot</th> 
+    <th>Blacklisted</th> 
+   </tr> 
+   <tr class="b"> 
+    <td align="left">central</td> 
+    <td align="left"><a class="externalLink" href="https://repo.maven.apache.org/maven2">https://repo.maven.apache.org/maven2</a></td> 
+    <td align="center">Yes</td> 
+    <td align="center">No</td> 
+    <td align="center">No</td> 
+   </tr> 
+   <tr class="a"> 
+    <td align="left">restlet.talend.com</td> 
+    <td align="left"><a class="externalLink" href="https://maven.restlet.talend.com">https://maven.restlet.talend.com</a></td> 
+    <td align="center">Yes</td> 
+    <td align="center">No</td> 
+    <td align="center">Yes</td> 
+   </tr> 
+   <tr class="b"> 
+    <td align="left">sonatype-nexus-snapshots</td> 
+    <td align="left"><a class="externalLink" href="http://oss.sonatype.org/content/repositories/snapshots">http://oss.sonatype.org/content/repositories/snapshots</a></td> 
+    <td align="center">No</td> 
+    <td align="center">Yes</td> 
+    <td align="center">No</td> 
+   </tr> 
+   <tr class="a"> 
+    <td align="left">apache.snapshots</td> 
+    <td align="left"><a class="externalLink" href="https://repository.apache.org/snapshots">https://repository.apache.org/snapshots</a></td> 
+    <td align="center">No</td> 
+    <td align="center">Yes</td> 
+    <td align="center">No</td> 
+   </tr> 
+  </tbody> 
+ </table> 
+ <p>Repository locations for each of the Dependencies.</p> 
+ <table border="0" class="bodyTable table table-striped table-hover"> 
+  <tbody> 
+   <tr class="a"> 
+    <th>Artifact</th> 
+    <th>central</th> 
+    <th>sonatype-nexus-snapshots</th> 
+    <th>apache.snapshots</th> 
+   </tr> 
+   <tr class="b"> 
+    <td align="left">com.beust:jcommander:jar:1.12</td> 
+    <td align="center"><a class="externalLink" href="https://repo.maven.apache.org/maven2/com/beust/jcommander/1.12/jcommander-1.12.jar"> 
+      <figure> 
+       <figcaption>
+         Found at https://repo.maven.apache.org/maven2 
+       </figcaption> <i class="icon-ok"></i> 
+      </figure></a></td> 
+    <td align="center">-</td> 
+    <td align="center">-</td> 
+   </tr> 
+   <tr class="a"> 
+    <td align="left">junit:junit:jar:4.11</td> 
+    <td align="center"><a class="externalLink" href="https://repo.maven.apache.org/maven2/junit/junit/4.11/junit-4.11.jar"> 
+      <figure> 
+       <figcaption>
+         Found at https://repo.maven.apache.org/maven2 
+       </figcaption> <i class="icon-ok"></i> 
+      </figure></a></td> 
+    <td align="center">-</td> 
+    <td align="center">-</td> 
+   </tr> 
+   <tr class="b"> 
+    <td align="left">org.beanshell:bsh:jar:2.0b4</td> 
+    <td align="center"><a class="externalLink" href="https://repo.maven.apache.org/maven2/org/beanshell/bsh/2.0b4/bsh-2.0b4.jar"> 
+      <figure> 
+       <figcaption>
+         Found at https://repo.maven.apache.org/maven2 
+       </figcaption> <i class="icon-ok"></i> 
+      </figure></a></td> 
+    <td align="center">-</td> 
+    <td align="center">-</td> 
+   </tr> 
+   <tr class="a"> 
+    <td align="left">org.hamcrest:hamcrest-core:jar:1.3</td> 
+    <td align="center"><a class="externalLink" href="https://repo.maven.apache.org/maven2/org/hamcrest/hamcrest-core/1.3/hamcrest-core-1.3.jar"> 
+      <figure> 
+       <figcaption>
+         Found at https://repo.maven.apache.org/maven2 
+       </figcaption> <i class="icon-ok"></i> 
+      </figure></a></td> 
+    <td align="center">-</td> 
+    <td align="center">-</td> 
+   </tr> 
+   <tr class="b"> 
+    <td align="left">org.testng:testng:jar:6.0.1</td> 
+    <td align="center"><a class="externalLink" href="https://repo.maven.apache.org/maven2/org/testng/testng/6.0.1/testng-6.0.1.jar"> 
+      <figure> 
+       <figcaption>
+         Found at https://repo.maven.apache.org/maven2 
+       </figcaption> <i class="icon-ok"></i> 
+      </figure></a></td> 
+    <td align="center">-</td> 
+    <td align="center">-</td> 
+   </tr> 
+   <tr class="a"> 
+    <td align="left">org.yaml:snakeyaml:jar:1.6</td> 
+    <td align="center"><a class="externalLink" href="https://repo.maven.apache.org/maven2/org/yaml/snakeyaml/1.6/snakeyaml-1.6.jar"> 
+      <figure> 
+       <figcaption>
+         Found at https://repo.maven.apache.org/maven2 
+       </figcaption> <i class="icon-ok"></i> 
+      </figure></a></td> 
+    <td align="center">-</td> 
+    <td align="center">-</td> 
+   </tr> 
+   <tr class="b"> 
+    <th>Total</th> 
+    <th>central</th> 
+    <th>sonatype-nexus-snapshots</th> 
+    <th>apache.snapshots</th> 
+   </tr> 
+   <tr class="a"> 
+    <td align="left">6 (compile: 4, test: 2)</td> 
+    <td align="center">6</td> 
+    <td align="center">0</td> 
+    <td align="center">0</td> 
+   </tr> 
+  </tbody> 
+ </table> 
+</section>
+			</div>
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