blob: c1c953ab3206499edef9bb6dd71c9e2a74dd303c [file] [log] [blame]
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<!-- Global site tag (gtag.js) - Google Analytics -->
<script async src="https://www.googletagmanager.com/gtag/js?id=UA-61232409-1"></script>
<script>
window.dataLayer = window.dataLayer || [];
function gtag(){dataLayer.push(arguments);}
gtag('js', new Date());
gtag('config', 'UA-61232409-1');
</script>
<!-- Yandex.Metrika counter -->
<script type="text/javascript" >
(function(m,e,t,r,i,k,a){m[i]=m[i]||function(){(m[i].a=m[i].a||[]).push(arguments)};
m[i].l=1*new Date();k=e.createElement(t),a=e.getElementsByTagName(t)[0],k.async=1,k.src=r,a.parentNode.insertBefore(k,a)})
(window, document, "script", "https://mc.yandex.ru/metrika/tag.js", "ym");
ym(72949126, "init", {
clickmap:true,
trackLinks:true,
accurateTrackBounce:true,
webvisor:true
});
</script>
<noscript><div><img src="https://mc.yandex.ru/watch/72949126" style="position:absolute; left:-9999px;" alt="" /></div></noscript>
<!-- /Yandex.Metrika counter -->
<!-- Bugyard widget embed -->
<script type="text/javascript">!function(){if("function"!=typeof window.bugyard){var a=function(){a.c(arguments)};a.q=[],a.c=function(b){a.q.push(b)},window.bugyard=a;var b=document.createElement("script");b.setAttribute("data-bugyard","610961912c35ff001493163a"),b.setAttribute("async","async"),b.setAttribute("defer","defer"),b.setAttribute("src","https://widget.bugyard.io/bugyard.min.js"),document.getElementsByTagName("head")[0].appendChild(b)}}(); window.bugyard("hideButton"); </script>
<link rel="preload" href='/assets/js/code-tabs.js?1' as="script" crossorigin>
<link rel="preload" href='/assets/js/page-nav.js' as="script" crossorigin>
<link rel="preload" href='/assets/js/docs-menu.js?20201005' as="script" crossorigin>
<style>:root{--gg-red:#ec1c24;--gg-orange:#ec1c24;--gg-orange-dark:#bc440b;--gg-orange-filter:invert(47%) sepia(61%) saturate(1950%) hue-rotate(345deg) brightness(100%) contrast(95%);--gg-dark-gray:#333333;--orange-line-thickness:3px;--block-code-background:rgba(241, 241, 241, 20%);--inline-code-background:rgba(241, 241, 241, 90%);--padding-top:25px;--link-color:#ec1c24;--body-background:#fcfcfc}header{min-height:var(--header-height);background:#fff;box-shadow:0 4px 10px 0 #eee,0 0 4px 0 #d5d5d5;z-index:1}header>.container{display:grid;grid-template-columns:auto auto 1fr auto auto auto;grid-template-areas:'left-toggle home nav ver api search lang';grid-template-rows:40px;flex-direction:row;align-items:center;justify-content:flex-start;padding:12px 20px;max-width:1400px;margin:0 auto}header nav>ul{padding:0;margin:0;list-style:none;display:inherit}header .dropdown{display:none;position:fixed;top:calc(var(--header-height) - 12px);width:auto;background:#fff;box-shadow:0 4px 4px 0 rgba(0,0,0,.24),0 0 4px 0 rgba(0,0,0,.12);border-radius:4px;padding-top:10px;padding-bottom:12px;z-index:2}header .dropdown li{display:flex}header .dropdown a{color:grey!important;font-size:16px;padding-top:5px;padding-bottom:4px}header .menu{border:none;background:0 0;width:40px;height:40px;margin-right:12px;grid-area:left-toggle}header .menu img{width:18px;height:12px}header .search-close,header .top-nav-toggle{background:0 0;border:none;padding:0;width:36px;height:36px;display:inline-flex;align-items:center;justify-content:center;color:var(--gg-dark-gray);font-size:26px}header .search-toggle{grid-area:search}header .top-nav-toggle{grid-area:top-toggle}header .home{grid-area:home;margin-right:auto}header .home img{height:36px}header #api-docs{grid-area:api;margin:0;display:flex}header #api-docs .dropdown{padding:.5em 0}header #api-docs a{padding:9px 14px;color:var(--gg-dark-gray)!important;text-decoration:none;white-space:nowrap}header #api-docs .dropdown-item a{font-weight:400;display:block;width:100%;min-width:150px}header #lang-selector li{list-style:none;display:flex;padding:9px 14px}header #lang-selector li a{display:flex;color:#000;align-items:center}header #lang-selector li a span{font-size:10px;margin-left:5px}header #lang-selector li a img{width:25px}header #lang-selector li .dropdown{margin-left:-70px}header #lang-selector li .dropdown .dropdown-item{padding:0 1em;margin-bottom:8px}header #lang-selector li .dropdown .dropdown-item a span{font-size:14px}header .search{margin-left:auto;margin-right:20px;grid-area:search}header .search input[type=search]{color:var(--gg-dark-gray);background:rgba(255,255,255,.8);border:1px solid #ccc;padding:10px 15px;font-family:inherit;max-width:148px;height:37px;font-size:14px;-webkit-appearance:unset;appearance:unset}header #version-selector{list-style:none;grid-area:ver;line-height:28px;border-radius:0;margin-right:10px;border:none;color:var(--gg-dark-gray);padding:5px 16px 5px 10px;white-space:nowrap;font-size:14px;width:auto;text-align:right;box-sizing:border-box;text-align-last:right;-moz-appearance:none;-webkit-appearance:none;appearance:none;direction:rtl}header #version-selector option{direction:ltr}header>nav{grid-area:nav;font-size:18px;display:flex;flex-direction:row;margin:0 20px}header #lang-selector{grid-area:lang}header .search-close{margin-right:10px}@media (max-width:600px){header .search{margin-right:5px}header .search input[type=search]{max-width:110px}}header:not(.narrow-header) .search-close,header:not(.narrow-header) .top-nav-toggle{display:none}@media (max-width:670px){header>.container{grid-template-columns:auto 1fr auto;grid-template-areas:'left-toggle home search' 'ver api lang'}header #lang-selector li{justify-content:flex-end}}pre,pre.rouge{padding:8px 15px;background:var(--block-code-background)!important;border-radius:5px;border:1px solid #e5e5e5;overflow-x:auto;min-height:36px;line-height:18px;color:#545454}code{color:#545454}pre.rouge code{background:0 0!important}:not(pre)>code{background:var(--inline-code-background);padding:.1em .5em;background-clip:padding-box;border-radius:3px;color:#545454;font-size:90%}.listingblock .content{position:relative}.highlight{color:#586e75}.highlight .c1{color:#657b83}.highlight .nt{color:#b58900}.highlight .o{color:#93a1a1}.highlight .k{color:#6c71c4}.highlight .kt{color:#cb4b16}.highlight .s,.highlight .s1{color:#859900}.highlight .nc{color:#b58900}.highlight .na{color:#268bd2}body{font-family:'Open Sans',sans-serif}h1,h2{color:#000;font-weight:400;font-family:'Open Sans'}h1{font-size:36px;line-height:40px}a{text-decoration:none;color:var(--link-color)}section{color:#545454}.admonitionblock .icon .title{display:none}body{--header-height:64px;--promotion-bar-height:35px;--footer-height:104px;--footer-gap:60px;padding:0;margin:0;display:flex;flex-direction:column;min-height:100vh;background-color:var(--body-background);font-family:'Open Sans',sans-serif}body>section{flex:1}header{position:-webkit-sticky;position:sticky;top:0;z-index:2}*{box-sizing:border-box}@media (max-width:670px){body{--header-height:97px}}.left-nav{padding:10px 20px;width:289px;overflow-y:auto;top:calc(var(--header-height) + var(--promotion-bar-height));height:calc(100vh - var(--header-height) - var(--promotion-bar-height));font-family:'Open Sans';padding-top:var(--padding-top);background-color:var(--body-background)}.left-nav li{list-style:none}.left-nav a,.left-nav button{text-decoration:none;color:#757575;font-size:16px;display:inline-flex;width:100%;margin:2px 0;padding:.25em .375em;background:0 0;border:none;font:inherit;text-align:left}.left-nav a.active{color:var(--link-color)}.left-nav .nav-group{margin-left:6px;font-size:14px}.left-nav nav{border-left:2px solid #ddd;margin-bottom:5px}.left-nav nav.collapsed{display:none}.left-nav nav>li>a,.left-nav nav>li>button{padding-left:20px;text-align:left}.left-nav nav>li>a.active{border-left:var(--orange-line-thickness) solid var(--active-color);padding-left:calc(20px - var(--orange-line-thickness))}.left-nav nav.sub_pages{border:none}.left-nav nav.sub_pages a{padding-left:32px}.left-nav .state-indicator{margin-left:auto;margin-top:5px;width:6.2px;height:10px;flex:0 0 auto;filter:invert(49%) sepia(4%) saturate(5%) hue-rotate(23deg) brightness(92%) contrast(90%)}.left-nav button.expanded .state-indicator{transform:rotate(90deg)}.right-nav{width:289px;padding:12px 26px;overflow-y:auto;height:calc(100vh - var(--header-height));top:0;position:-webkit-sticky;position:sticky;display:flex;flex-direction:column;font-family:'Open sans';padding-top:var(--padding-top);background-color:#fff}.right-nav ul{list-style:none;padding:0;margin:0}.right-nav li{padding:0}.right-nav a{--border-width:0px;font-size:14px;color:#757575;padding-left:calc(15px * var(--nesting-level) + 8px - var(--border-width));margin:.3em 0;display:inline-block}.right-nav .sectlevel1{border-left:2px solid #ddd}.right-nav .sectlevel1{--nesting-level:0}.right-nav .sectlevel2{--nesting-level:1}.right-nav .sectlevel3{--nesting-level:2}@media (max-width:1200px){.right-nav{width:230px}}.right-nav footer{font-size:12px;padding:calc(var(--footer-gap) * .3) 0 5px;text-align:left;margin:auto 0 0}section.page-docs{display:grid;grid-template-columns:auto 1fr auto;grid-template-rows:100%;grid-template-areas:'left-nav content right-nav';line-height:20px;max-width:1440px;margin:auto;width:100%}section.page-docs>article{border-left:1px solid #eee;background-color:#fff;padding:0 50px 30px;grid-area:content;overflow:hidden;font-family:sans-serif;font-size:16px;color:#545454;line-height:1.6em}section.page-docs>article h1,section.page-docs>article h2{font-family:'Open Sans'}@media (max-width:800px){section.page-docs>article{padding-left:15px;padding-right:15px}}section.page-docs .edit-link{position:relative;top:10px;right:10px;float:right;padding-top:calc(var(--header-height) + var(--padding-top));margin-top:calc((-1 * var(--header-height)))}section.page-docs h1,section.page-docs h2{margin-bottom:0}section.page-docs h2[id]{margin-top:var(--margin-top);margin-bottom:calc(var(--margin-top) * .5);z-index:-1}section.page-docs .title{font-style:italic}section.page-docs h2[id]{--margin-top:1.2em}.left-nav{bottom:0;position:-webkit-sticky;position:sticky}.left-nav{grid-area:left-nav}.right-nav{grid-area:right-nav}.left-nav__overlay{display:none;background:rgba(0,0,0,.5);z-index:1;position:fixed;top:var(--header-height);bottom:0;left:0;right:0}@media (max-width:990px){body:not(.hide-left-nav) .left-nav__overlay{display:block}nav.left-nav{background:#fafafa;grid-area:left-nav;box-shadow:0 4px 4px 0 rgba(0,0,0,.24),0 0 4px 0 rgba(0,0,0,.12);min-height:calc(100vh - var(--header-height));max-height:calc(100vh - var(--header-height));position:fixed;bottom:0;top:var(--header-height);z-index:2}section.page-docs>article{grid-column-start:left-nav;grid-column-end:content;grid-row:content}}@media (max-width:800px){nav.right-nav{display:none}}:target:before{content:"";display:block;margin-top:calc(var(--header-height) * -1);height:var(--header-height);width:1px}@media (min-width:600px) and (max-width:900px){:target:before{content:"";display:block;width:1px;margin-top:-150px;height:150px}}
#header #promotion-bar { background-color: #333333; padding: 8px; }
#header #promotion-bar p { font-size: 14px; line-height: 1.4em; font-weight: 600; padding: 0; margin: 0; color: #f0f0f0; text-align: center;}
#header #promotion-bar p a { color: #FCB903; } </style>
<meta name="ignite-version" content="2.9.0" />
<title>Handling Exceptions | Ignite Documentation</title>
<link rel="canonical" href="/docs/2.9.0/perf-and-troubleshooting/handling-exceptions" />
<META NAME="ROBOTS" CONTENT="NOINDEX" />
<link rel="shortcut icon" href="/favicon.ico">
<meta name='viewport' content='width=device-width, height=device-height, initial-scale=1.0, minimum-scale=1.0'>
<link rel="preload" as="style" href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;600;700&display=swap" />
<link rel="stylesheet" href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;600;700&display=swap" media="print" onload="this.media='all'">
<noscript>
<link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@300;400;600;700&display=swap" rel="stylesheet">
</noscript>
<script>
// AnchorJS - v4.2.0 - 2019-01-01
// https://github.com/bryanbraun/anchorjs
// Copyright (c) 2019 Bryan Braun; Licensed MIT
!function(A,e){"use strict";"function"==typeof define&&define.amd?define([],e):"object"==typeof module&&module.exports?module.exports=e():(A.AnchorJS=e(),A.anchors=new A.AnchorJS)}(this,function(){"use strict";return function(A){function f(A){A.icon=A.hasOwnProperty("icon")?A.icon:"",A.visible=A.hasOwnProperty("visible")?A.visible:"hover",A.placement=A.hasOwnProperty("placement")?A.placement:"right",A.ariaLabel=A.hasOwnProperty("ariaLabel")?A.ariaLabel:"Anchor",A.class=A.hasOwnProperty("class")?A.class:"",A.base=A.hasOwnProperty("base")?A.base:"",A.truncate=A.hasOwnProperty("truncate")?Math.floor(A.truncate):64,A.titleText=A.hasOwnProperty("titleText")?A.titleText:""}function p(A){var e;if("string"==typeof A||A instanceof String)e=[].slice.call(document.querySelectorAll(A));else{if(!(Array.isArray(A)||A instanceof NodeList))throw new Error("The selector provided to AnchorJS was invalid.");e=[].slice.call(A)}return e}this.options=A||{},this.elements=[],f(this.options),this.isTouchDevice=function(){return!!("ontouchstart"in window||window.DocumentTouch&&document instanceof DocumentTouch)},this.add=function(A){var e,t,i,n,o,s,a,r,c,h,l,u,d=[];if(f(this.options),"touch"===(l=this.options.visible)&&(l=this.isTouchDevice()?"always":"hover"),A||(A="h2, h3, h4, h5, h6"),0===(e=p(A)).length)return this;for(function(){if(null===document.head.querySelector("style.anchorjs")){var A,e=document.createElement("style");e.className="anchorjs",e.appendChild(document.createTextNode("")),void 0===(A=document.head.querySelector('[rel="stylesheet"], style'))?document.head.appendChild(e):document.head.insertBefore(e,A),e.sheet.insertRule(" .anchorjs-link { opacity: 0; text-decoration: none; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; }",e.sheet.cssRules.length),e.sheet.insertRule(" *:hover > .anchorjs-link, .anchorjs-link:focus { opacity: 1; }",e.sheet.cssRules.length),e.sheet.insertRule(" [data-anchorjs-icon]::after { content: attr(data-anchorjs-icon); }",e.sheet.cssRules.length),e.sheet.insertRule(' @font-face { font-family: "anchorjs-icons"; src: url(data:n/a;base64,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) format("truetype"); }',e.sheet.cssRules.length)}}(),t=document.querySelectorAll("[id]"),i=[].map.call(t,function(A){return A.id}),o=0;o<e.length;o++)if(this.hasAnchorJSLink(e[o]))d.push(o);else{if(e[o].hasAttribute("id"))n=e[o].getAttribute("id");else if(e[o].hasAttribute("data-anchor-id"))n=e[o].getAttribute("data-anchor-id");else{for(c=r=this.urlify(e[o].textContent),a=0;void 0!==s&&(c=r+"-"+a),a+=1,-1!==(s=i.indexOf(c)););s=void 0,i.push(c),e[o].setAttribute("id",c),n=c}n.replace(/-/g," "),(h=document.createElement("a")).className="anchorjs-link "+this.options.class,h.setAttribute("aria-label",this.options.ariaLabel),h.setAttribute("data-anchorjs-icon",this.options.icon),this.options.titleText&&(h.title=this.options.titleText),u=document.querySelector("base")?window.location.pathname+window.location.search:"",u=this.options.base||u,h.href=u+"#"+n,"always"===l&&(h.style.opacity="1"),""===this.options.icon&&(h.style.font="1em/1 anchorjs-icons","left"===this.options.placement&&(h.style.lineHeight="inherit")),"left"===this.options.placement?(h.style.position="absolute",h.style.marginLeft="-1em",h.style.paddingRight="0.5em",e[o].insertBefore(h,e[o].firstChild)):(h.style.paddingLeft="0.375em",e[o].appendChild(h))}for(o=0;o<d.length;o++)e.splice(d[o]-o,1);return this.elements=this.elements.concat(e),this},this.remove=function(A){for(var e,t,i=p(A),n=0;n<i.length;n++)(t=i[n].querySelector(".anchorjs-link"))&&(-1!==(e=this.elements.indexOf(i[n]))&&this.elements.splice(e,1),i[n].removeChild(t));return this},this.removeAll=function(){this.remove(this.elements)},this.urlify=function(A){return this.options.truncate||f(this.options),A.trim().replace(/\'/gi,"").replace(/[& +$,:;=?@"#{}|^~[`%!'<>\]\.\/\(\)\*\\\n\t\b\v]/g,"-").replace(/-{2,}/g,"-").substring(0,this.options.truncate).replace(/^-+|-+$/gm,"").toLowerCase()},this.hasAnchorJSLink=function(A){var e=A.firstChild&&-1<(" "+A.firstChild.className+" ").indexOf(" anchorjs-link "),t=A.lastChild&&-1<(" "+A.lastChild.className+" ").indexOf(" anchorjs-link ");return e||t||!1}}});
</script>
</head>
<body>
<header>
<!--#include virtual="/includes/promotion_banner.html" -->
<div class="container">
<button type='button' class='menu' title='Docs menu'>
<img src="/assets/images/menu-icon.svg" width="18" height="12" alt="menu icon" />
</button>
<div class='home'>
<a href="/" class='home' title='Apache Ignite home'>
<img src="/assets/images/apache_ignite_logo.svg" alt="Apache Ignite logo" width="103" height="36" >
</a>
</div>
<select id="version-selector">
<option value="2.9.0">2.9.0</option>
</select>
<nav id="api-docs"><ul>
<li><a href="#">APIs</a>
<nav class='dropdown'>
<ul>
<li class="dropdown-item"><a href="/releases/latest/javadoc/index.html">Java</a></li>
<li class="dropdown-item"><a href="/releases/latest/dotnetdoc/api/">C#/.NET</a></li>
<li class="dropdown-item"><a href="/releases/latest/cppdoc/index.html">C++</a></li>
<li class="dropdown-item"><a href="/releases/latest/scaladoc/scalar/index.html#org.apache.ignite.scalar.scalar$">Scala</a></li>
</ul>
</nav>
</li>
<li><a href="#">Examples</a>
<nav class="dropdown">
<ul>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/examples" target="_blank" rel="noopener" title="Apache Ignite Java examples">Java</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/dotnet/examples" target="_blank" rel="noopener" title="Apache Ignite C#/.NET examples">C#/.NET</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/cpp/examples" target="_blank" rel="noopener" title="Apache Ignite C++ examples">C++</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/python/examples" target="_blank" rel="noopener" title="Apache Ignite Python examples">Python</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/nodejs/examples" target="_blank" rel="noopener" title="Apache Ignite NodeJS examples">NodeJS</a></li>
<li class="dropdown-item"><a href="https://github.com/apache/ignite/tree/master/modules/platforms/php/examples" target="_blank" rel="noopener" title="Apache Ignite PHP examples">PHP</a></li>
</ul>
</nav>
</li></ul>
</nav>
<form class='search'>
<button class="search-close" type='button'><img src='/assets/images/cancel.svg' alt="close" width="10" height="10" /></button>
<input type="search" placeholder="Search…" id="search-input">
</form>
<nav id="lang-selector"><ul>
<li><a href="#"><img src="/assets/images/icon_lang_en_75x75.jpg" alt="English language icon" width="25" height="25" /><span></span></a>
<nav class="dropdown">
<li class="dropdown-item"><a href="/docs/latest/" ><img src="/assets/images/icon_lang_en_75x75.jpg" alt="English language icon" width="25" height="25" /><span>English</span></a></li>
<li class="dropdown-item"><a href="https://www.ignite-service.cn/doc/java/" target="_blank" rel="noopener"><img src="/assets/images/icon_lang_cn_75x75.jpg" width="25" height="25" alt="Chinese language icon" /><span>Chinese</span></a></li>
</nav>
</li></ul>
</nav>
<button type='button' class='top-nav-toggle'></button>
</div>
</header>
<link rel="stylesheet" href="/assets/css/docs.css">
<section class='page-docs'>
<nav class='left-nav' data-swiftype-index='false'>
<li>
<a href="/docs/2.9.0/index" class='' >Documentation Overview</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Quick Start Guides<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/quick-start/java"
class=''
>Java</a>
</li>
<li>
<a href="/docs/2.9.0/quick-start/dotnet"
class=''
>.NET/C#</a>
</li>
<li>
<a href="/docs/2.9.0/quick-start/cpp"
class=''
>C++</a>
</li>
<li>
<a href="/docs/2.9.0/quick-start/python"
class=''
>Python</a>
</li>
<li>
<a href="/docs/2.9.0/quick-start/nodejs"
class=''
>Node.JS</a>
</li>
<li>
<a href="/docs/2.9.0/quick-start/sql"
class=''
>SQL</a>
</li>
<li>
<a href="/docs/2.9.0/quick-start/php"
class=''
>PHP</a>
</li>
<li>
<a href="/docs/2.9.0/quick-start/restapi"
class=''
>REST API</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Installation<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/installation/installing-using-zip"
class=''
>Installing Using ZIP Archive</a>
</li>
<li>
<a href="/docs/2.9.0/installation/installing-using-docker"
class=''
>Installing Using Docker</a>
</li>
<li>
<a href="/docs/2.9.0/installation/deb-rpm"
class=''
>Installing DEB or RPM package</a>
</li>
<li>
<button
type='button'
class='collapsed '>Kubernetes<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/installation/kubernetes/amazon-eks-deployment" class=''>Amazon EKS</a></li>
<li><a href="/docs/2.9.0/installation/kubernetes/azure-deployment" class=''>Azure Kubernetes Service</a></li>
<li><a href="/docs/2.9.0/installation/kubernetes/gke-deployment" class=''>Google Kubernetes Engine</a></li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/installation/vmware-installation"
class=''
>VMWare</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Setting Up<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/understanding-configuration"
class=''
>Understanding Configuration</a>
</li>
<li>
<a href="/docs/2.9.0/setup"
class=''
>Setting Up</a>
</li>
<li>
<a href="/docs/2.9.0/logging"
class=''
>Configuring Logging</a>
</li>
<li>
<a href="/docs/2.9.0/resources-injection"
class=''
>Resources Injection</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/starting-nodes" class='' >Starting and Stopping Nodes</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Clustering<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/clustering/clustering"
class=''
>Overview</a>
</li>
<li>
<a href="/docs/2.9.0/clustering/tcp-ip-discovery"
class=''
>TCP/IP Discovery</a>
</li>
<li>
<a href="/docs/2.9.0/clustering/zookeeper-discovery"
class=''
>ZooKeeper Discovery</a>
</li>
<li>
<a href="/docs/2.9.0/clustering/discovery-in-the-cloud"
class=''
>Discovery in the Cloud</a>
</li>
<li>
<a href="/docs/2.9.0/clustering/network-configuration"
class=''
>Network Configuration</a>
</li>
<li>
<a href="/docs/2.9.0/clustering/connect-client-nodes"
class=''
>Connecting Client Nodes</a>
</li>
<li>
<a href="/docs/2.9.0/clustering/baseline-topology"
class=''
>Baseline Topology</a>
</li>
<li>
<a href="/docs/2.9.0/clustering/running-client-nodes-behind-nat"
class=''
>Running Client Nodes Behind NAT</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Thin Clients<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/thin-clients/getting-started-with-thin-clients"
class=''
>Thin Clients Overview</a>
</li>
<li>
<a href="/docs/2.9.0/thin-clients/java-thin-client"
class=''
>Java Thin Client</a>
</li>
<li>
<a href="/docs/2.9.0/thin-clients/dotnet-thin-client"
class=''
>.NET Thin Client</a>
</li>
<li>
<a href="/docs/2.9.0/thin-clients/cpp-thin-client"
class=''
>C++ Thin Client</a>
</li>
<li>
<a href="/docs/2.9.0/thin-clients/python-thin-client"
class=''
>Python Thin Client</a>
</li>
<li>
<a href="/docs/2.9.0/thin-clients/php-thin-client"
class=''
>PHP Thin Client</a>
</li>
<li>
<a href="/docs/2.9.0/thin-clients/nodejs-thin-client"
class=''
>Node.js Thin Client</a>
</li>
<li>
<button
type='button'
class='collapsed '>Binary Client Protocol<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/binary-client-protocol/binary-client-protocol" class=''>Binary Client Protocol</a></li>
<li><a href="/docs/2.9.0/binary-client-protocol/data-format" class=''>Data Format</a></li>
<li><a href="/docs/2.9.0/binary-client-protocol/key-value-queries" class=''>Key-Value Queries</a></li>
<li><a href="/docs/2.9.0/binary-client-protocol/sql-and-scan-queries" class=''>SQL and Scan Queries</a></li>
<li><a href="/docs/2.9.0/binary-client-protocol/binary-type-metadata" class=''>Binary Types Metadata</a></li>
<li><a href="/docs/2.9.0/binary-client-protocol/cache-configuration" class=''>Cache Configuration</a></li>
</nav>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Data Modeling<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/data-modeling/data-modeling"
class=''
>Introduction</a>
</li>
<li>
<a href="/docs/2.9.0/data-modeling/data-partitioning"
class=''
>Data Partitioning</a>
</li>
<li>
<a href="/docs/2.9.0/data-modeling/affinity-collocation"
class=''
>Affinity Colocation</a>
</li>
<li>
<a href="/docs/2.9.0/data-modeling/binary-marshaller"
class=''
>Binary Marshaller</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Configuring Memory<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/memory-architecture"
class=''
>Memory Architecture</a>
</li>
<li>
<a href="/docs/2.9.0/memory-configuration/data-regions"
class=''
>Configuring Data Regions</a>
</li>
<li>
<a href="/docs/2.9.0/memory-configuration/eviction-policies"
class=''
>Eviction Policies</a>
</li>
<li>
<a href="/docs/2.9.0/memory-configuration/replacement-policies"
class=''
>Replacement Policies</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Configuring Persistence<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/persistence/native-persistence"
class=''
>Ignite Persistence</a>
</li>
<li>
<a href="/docs/2.9.0/persistence/external-storage"
class=''
>External Storage</a>
</li>
<li>
<a href="/docs/2.9.0/persistence/swap"
class=''
>Swapping</a>
</li>
<li>
<a href="/docs/2.9.0/persistence/custom-cache-store"
class=''
>Implementing Custom Cache Store</a>
</li>
<li>
<a href="/docs/2.9.0/persistence/snapshot-directory"
class=''
>Configuring Snapshot Directory</a>
</li>
<li>
<a href="/docs/2.9.0/persistence/disk-compression"
class=''
>Disk Compression</a>
</li>
<li>
<a href="/docs/2.9.0/persistence/persistence-tuning"
class=''
>Tuning Persistence</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/snapshots/snapshots" class='' >Cluster Snapshots</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Configuring Caches<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/configuring-caches/configuration-overview"
class=''
>Cache Configuration</a>
</li>
<li>
<a href="/docs/2.9.0/configuring-caches/configuring-backups"
class=''
>Configuring Partition Backups</a>
</li>
<li>
<a href="/docs/2.9.0/configuring-caches/partition-loss-policy"
class=''
>Partition Loss Policy</a>
</li>
<li>
<a href="/docs/2.9.0/configuring-caches/atomicity-modes"
class=''
>Atomicity Modes</a>
</li>
<li>
<a href="/docs/2.9.0/configuring-caches/expiry-policies"
class=''
>Expiry Policy</a>
</li>
<li>
<a href="/docs/2.9.0/configuring-caches/on-heap-caching"
class=''
>On-Heap Caching</a>
</li>
<li>
<a href="/docs/2.9.0/configuring-caches/cache-groups"
class=''
>Cache Groups</a>
</li>
<li>
<a href="/docs/2.9.0/configuring-caches/near-cache"
class=''
>Near Caches</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/data-rebalancing" class='' >Data Rebalancing</a>
</li>
<li>
<a href="/docs/2.9.0/data-streaming" class='' >Data Streaming</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Using Key-Value API<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/key-value-api/basic-cache-operations"
class=''
>Basic Cache Operations</a>
</li>
<li>
<a href="/docs/2.9.0/key-value-api/binary-objects"
class=''
>Working with Binary Objects</a>
</li>
<li>
<a href="/docs/2.9.0/key-value-api/using-cache-queries"
class=''
>Using Cache Queries</a>
</li>
<li>
<a href="/docs/2.9.0/read-repair"
class=''
>Read Repair</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/key-value-api/transactions" class='' >Performing Transactions</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Working with SQL<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/SQL/sql-introduction"
class=''
>Introduction</a>
</li>
<li>
<a href="/docs/2.9.0/SQL/schemas"
class=''
>Understanding Schemas</a>
</li>
<li>
<a href="/docs/2.9.0/SQL/indexes"
class=''
>Defining Indexes</a>
</li>
<li>
<a href="/docs/2.9.0/SQL/sql-api"
class=''
>Using SQL API</a>
</li>
<li>
<a href="/docs/2.9.0/SQL/distributed-joins"
class=''
>Distributed Joins</a>
</li>
<li>
<a href="/docs/2.9.0/SQL/custom-sql-func"
class=''
>Custom SQL Functions</a>
</li>
<li>
<a href="/docs/2.9.0/SQL/JDBC/jdbc-driver"
class=''
>JDBC Driver</a>
</li>
<li>
<a href="/docs/2.9.0/SQL/JDBC/jdbc-client-driver"
class=''
>JDBC Client Driver</a>
</li>
<li>
<button
type='button'
class='collapsed '>ODBC Driver<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/SQL/ODBC/odbc-driver" class=''>ODBC Driver</a></li>
<li><a href="/docs/2.9.0//SQL/ODBC/connection-string-dsn" class=''>Connection String and DSN</a></li>
<li><a href="/docs/2.9.0/SQL/ODBC/querying-modifying-data" class=''>Querying and Modifying Data</a></li>
<li><a href="/docs/2.9.0/SQL/ODBC/specification" class=''>Specification</a></li>
<li><a href="/docs/2.9.0/SQL/ODBC/data-types" class=''>Data Types</a></li>
<li><a href="/docs/2.9.0/SQL/ODBC/error-codes" class=''>Error Codes</a></li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/transactions/mvcc"
class=''
>Multiversion Concurrency Control</a>
</li>
<li>
<a href="/docs/2.9.0/SQL/sql-statistics"
class=''
>SQL Statistics</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>SQL Reference<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/sql-reference/sql-conformance"
class=''
>SQL Conformance</a>
</li>
<li>
<a href="/docs/2.9.0/sql-reference/ddl"
class=''
>Data Definition Language (DDL)</a>
</li>
<li>
<a href="/docs/2.9.0/sql-reference/dml"
class=''
>Data Manipulation Language (DML)</a>
</li>
<li>
<a href="/docs/2.9.0/sql-reference/transactions"
class=''
>Transactions</a>
</li>
<li>
<a href="/docs/2.9.0/sql-reference/operational-commands"
class=''
>Operational Commands</a>
</li>
<li>
<a href="/docs/2.9.0/sql-reference/aggregate-functions"
class=''
>Aggregate functions</a>
</li>
<li>
<a href="/docs/2.9.0/sql-reference/numeric-functions"
class=''
>Numeric Functions</a>
</li>
<li>
<a href="/docs/2.9.0/sql-reference/string-functions"
class=''
>String Functions</a>
</li>
<li>
<a href="/docs/2.9.0/sql-reference/date-time-functions"
class=''
>Data and Time Functions</a>
</li>
<li>
<a href="/docs/2.9.0/sql-reference/system-functions"
class=''
>System Functions</a>
</li>
<li>
<a href="/docs/2.9.0/sql-reference/data-types"
class=''
>Data Types</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Distributed Computing<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/distributed-computing/distributed-computing"
class=''
>Distributed Computing API</a>
</li>
<li>
<a href="/docs/2.9.0/distributed-computing/cluster-groups"
class=''
>Cluster Groups</a>
</li>
<li>
<a href="/docs/2.9.0/distributed-computing/executor-service"
class=''
>Executor Service</a>
</li>
<li>
<a href="/docs/2.9.0/distributed-computing/map-reduce"
class=''
>MapReduce API</a>
</li>
<li>
<a href="/docs/2.9.0/distributed-computing/load-balancing"
class=''
>Load Balancing</a>
</li>
<li>
<a href="/docs/2.9.0/distributed-computing/fault-tolerance"
class=''
>Fault Tolerance</a>
</li>
<li>
<a href="/docs/2.9.0/distributed-computing/job-scheduling"
class=''
>Job Scheduling</a>
</li>
<li>
<a href="/docs/2.9.0/distributed-computing/collocated-computations"
class=''
>Colocating Computations with Data</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Code Deployment<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/code-deployment/deploying-user-code"
class=''
>Deploying User Code</a>
</li>
<li>
<a href="/docs/2.9.0/code-deployment/peer-class-loading"
class=''
>Peer Class Loading</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Machine Learning<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/machine-learning/machine-learning"
class=''
>Machine Learning</a>
</li>
<li>
<a href="/docs/2.9.0/machine-learning/partition-based-dataset"
class=''
>Partition Based Dataset</a>
</li>
<li>
<a href="/docs/2.9.0/machine-learning/updating-trained-models"
class=''
>Updating Trained Models</a>
</li>
<li>
<button
type='button'
class='collapsed '>Binary Classification<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/machine-learning/binary-classification/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.0/machine-learning/binary-classification/linear-svm" class=''>Linear SVM (Support Vector Machine)</a></li>
<li><a href="/docs/2.9.0/machine-learning/binary-classification/decision-trees" class=''>Decision Trees</a></li>
<li><a href="/docs/2.9.0/machine-learning/binary-classification/multilayer-perceptron" class=''>Multilayer Perceptron</a></li>
<li><a href="/docs/2.9.0/machine-learning/binary-classification/logistic-regression" class=''>Logistic Regression</a></li>
<li><a href="/docs/2.9.0/machine-learning/binary-classification/knn-classification" class=''>k-NN Classification</a></li>
<li><a href="/docs/2.9.0/machine-learning/binary-classification/ann" class=''>ANN (Approximate Nearest Neighbor)</a></li>
<li><a href="/docs/2.9.0/machine-learning/binary-classification/naive-bayes" class=''>Naive Bayes</a></li>
</nav>
</li>
<li>
<button
type='button'
class='collapsed '>Regression<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/machine-learning/regression/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.0/machine-learning/regression/linear-regression" class=''>Linear Regression</a></li>
<li><a href="/docs/2.9.0/machine-learning/regression/decision-trees-regression" class=''>Decision Trees Regression</a></li>
<li><a href="/docs/2.9.0/machine-learning/regression/knn-regression" class=''>k-NN Regression</a></li>
</nav>
</li>
<li>
<button
type='button'
class='collapsed '>Clustering<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/machine-learning/clustering/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.0/machine-learning/clustering/k-means-clustering" class=''>K-Means Clustering</a></li>
<li><a href="/docs/2.9.0/machine-learning/clustering/gaussian-mixture" class=''>Gaussian mixture (GMM)</a></li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/machine-learning/preprocessing"
class=''
>Preprocessing</a>
</li>
<li>
<button
type='button'
class='collapsed '>Model Selection<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/machine-learning/model-selection/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.0/machine-learning/model-selection/evaluator" class=''>Evaluator</a></li>
<li><a href="/docs/2.9.0/machine-learning/model-selection/split-the-dataset-on-test-and-train-datasets" class=''>Split the dataset on test and train datasets</a></li>
<li><a href="/docs/2.9.0/machine-learning/model-selection/hyper-parameter-tuning" class=''>Hyper-parameter tuning</a></li>
<li><a href="/docs/2.9.0/machine-learning/model-selection/pipeline-api" class=''>Pipeline API</a></li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/machine-learning/multiclass-classification"
class=''
>Multiclass Classification</a>
</li>
<li>
<button
type='button'
class='collapsed '>Ensemble Methods<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/machine-learning/ensemble-methods/introduction" class=''></a></li>
<li><a href="/docs/2.9.0/machine-learning/ensemble-methods/stacking" class=''>Stacking</a></li>
<li><a href="/docs/2.9.0/machine-learning/ensemble-methods/baggin" class=''>Bagging</a></li>
<li><a href="/docs/2.9.0/machine-learning/ensemble-methods/random-forest" class=''>Random Forest</a></li>
<li><a href="/docs/2.9.0/machine-learning/ensemble-methods/gradient-boosting" class=''>Gradient Boosting</a></li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/machine-learning/recommendation-systems"
class=''
>Recommendation Systems</a>
</li>
<li>
<button
type='button'
class='collapsed '>Importing Model<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/machine-learning/importing-model/introduction" class=''>Introduction</a></li>
<li><a href="/docs/2.9.0/machine-learning/importing-model/model-import-from-gxboost" class=''>Import Model from XGBoost</a></li>
<li><a href="/docs/2.9.0/machine-learning/importing-model/model-import-from-apache-spark" class=''>Import Model from Apache Spark</a></li>
</nav>
</li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/key-value-api/continuous-queries" class='' >Using Continuous Queries</a>
</li>
<li>
<a href="/docs/2.9.0/services/services" class='' >Using Ignite Services</a>
</li>
<li>
<a href="/docs/2.9.0/messaging" class='' >Using Ignite Messaging</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Distributed Data Structures<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/data-structures/queue-and-set"
class=''
>Queue and Set</a>
</li>
<li>
<a href="/docs/2.9.0/data-structures/atomic-types"
class=''
>Atomic Types</a>
</li>
<li>
<a href="/docs/2.9.0/data-structures/countdownlatch"
class=''
>CountDownLatch</a>
</li>
<li>
<a href="/docs/2.9.0/data-structures/atomic-sequence"
class=''
>Atomic Sequence</a>
</li>
<li>
<a href="/docs/2.9.0/data-structures/semaphore"
class=''
>Semaphore</a>
</li>
<li>
<a href="/docs/2.9.0/data-structures/id-generator"
class=''
>ID Generator</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/distributed-locks" class='' >Distributed Locks</a>
</li>
<li>
<a href="/docs/2.9.0/restapi" class='' >REST API</a>
</li>
<li>
<button type='button' class='group-toggle collapsed '>.NET Specific<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/net-specific/net-configuration-options"
class=''
>Configuration Options</a>
</li>
<li>
<a href="/docs/2.9.0/net-specific/net-deployment-options"
class=''
>Deployment Options</a>
</li>
<li>
<a href="/docs/2.9.0/net-specific/net-standalone-nodes"
class=''
>Standalone Nodes</a>
</li>
<li>
<a href="/docs/2.9.0/net-specific/net-async"
class=''
>Asynchronous APIs</a>
</li>
<li>
<a href="/docs/2.9.0/net-specific/net-logging"
class=''
>Logging</a>
</li>
<li>
<a href="/docs/2.9.0/net-specific/net-linq"
class=''
>LINQ</a>
</li>
<li>
<a href="/docs/2.9.0/net-specific/net-java-services-execution"
class=''
>Java Services Execution</a>
</li>
<li>
<a href="/docs/2.9.0/net-specific/net-platform-cache"
class=''
>.NET Platform Cache</a>
</li>
<li>
<a href="/docs/2.9.0/net-specific/net-plugins"
class=''
>Plugins</a>
</li>
<li>
<a href="/docs/2.9.0/net-specific/net-serialization"
class=''
>Serialization</a>
</li>
<li>
<a href="/docs/2.9.0/net-specific/net-cross-platform-support"
class=''
>Cross-Platform Support</a>
</li>
<li>
<a href="/docs/2.9.0/net-specific/net-platform-interoperability"
class=''
>Platform Interoperability</a>
</li>
<li>
<a href="/docs/2.9.0/net-specific/net-remote-assembly-loading"
class=''
>Remote Assembly Loading</a>
</li>
<li>
<a href="/docs/2.9.0/net-specific/net-troubleshooting"
class=''
>Troubleshooting</a>
</li>
<li>
<button
type='button'
class='collapsed '>Integrations<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/net-specific/asp-net-output-caching" class=''>ASP.NET Output Caching</a></li>
<li><a href="/docs/2.9.0/net-specific/asp-net-session-state-caching" class=''>ASP.NET Session State Caching</a></li>
<li><a href="/docs/2.9.0/net-specific/net-entity-framework-cache" class=''>Entity Framework 2nd Level Cache</a></li>
</nav>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>C++ Specific<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/cpp-specific/cpp-serialization"
class=''
>Serialization</a>
</li>
<li>
<a href="/docs/2.9.0/cpp-specific/cpp-platform-interoperability"
class=''
>Platform Interoperability</a>
</li>
<li>
<a href="/docs/2.9.0/cpp-specific/cpp-objects-lifetime"
class=''
>Objects Lifetime</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Monitoring<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/monitoring-metrics/intro"
class=''
>Introduction</a>
</li>
<li>
<a href="/docs/2.9.0/monitoring-metrics/cluster-id"
class=''
>Cluster ID and Tag</a>
</li>
<li>
<a href="/docs/2.9.0/monitoring-metrics/cluster-states"
class=''
>Cluster States</a>
</li>
<li>
<button
type='button'
class='collapsed '>Metrics<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/monitoring-metrics/configuring-metrics" class=''>Configuring Metrics</a></li>
<li><a href="/docs/2.9.0/monitoring-metrics/metrics" class=''>JMX Metrics</a></li>
</nav>
</li>
<li>
<button
type='button'
class='collapsed '>New Metrics System<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/monitoring-metrics/new-metrics-system" class=''>Introduction</a></li>
<li><a href="/docs/2.9.0/monitoring-metrics/new-metrics" class=''>Metrics</a></li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/monitoring-metrics/system-views"
class=''
>System Views</a>
</li>
<li>
<a href="/docs/2.9.0/monitoring-metrics/performance-statistics"
class=''
>Performance Statistics</a>
</li>
<li>
<a href="/docs/2.9.0/monitoring-metrics/tracing"
class=''
>Tracing</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Working with Events<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/events/listening-to-events"
class=''
>Enabling and Listenting to Events</a>
</li>
<li>
<a href="/docs/2.9.0/events/events"
class=''
>Events</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Tools<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/tools/control-script"
class=''
>Control Script</a>
</li>
<li>
<a href="/docs/2.9.0/tools/visor-cmd"
class=''
>Visor CMD</a>
</li>
<li>
<a href="/docs/2.9.0/tools/gg-control-center"
class=''
>GridGain Control Center</a>
</li>
<li>
<a href="/docs/2.9.0/tools/sqlline"
class=''
>SQLLine</a>
</li>
<li>
<a href="/docs/2.9.0/tools/tableau"
class=''
>Tableau</a>
</li>
<li>
<a href="/docs/2.9.0/tools/informatica"
class=''
>Informatica</a>
</li>
<li>
<a href="/docs/2.9.0/tools/pentaho"
class=''
>Pentaho</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Security<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<a href="/docs/2.9.0/security/authentication"
class=''
>Authentication</a>
</li>
<li>
<a href="/docs/2.9.0/security/ssl-tls"
class=''
>SSL/TLS</a>
</li>
<li>
<button
type='button'
class='collapsed '>Transparent Data Encryption<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/security/tde" class=''>Introduction</a></li>
<li><a href="/docs/2.9.0/security/master-key-rotation" class=''>Master key rotation</a></li>
<li><a href="/docs/2.9.0/security/cache-encryption-key-rotation" class=''>Cache encryption key rotation</a></li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/security/sandbox"
class=''
>Sandbox</a>
</li>
</nav>
</li>
<li>
<button type='button' class='group-toggle collapsed '>Extensions and Integrations<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group collapsed'>
<li>
<button
type='button'
class='collapsed '>Spring<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/extensions-and-integrations/spring/spring-boot" class=''>Spring Boot</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/spring/spring-data" class=''>Spring Data</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/spring/spring-caching" class=''>Spring Caching</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/spring/spring-tx" class=''>Spring Transactions</a></li>
</nav>
</li>
<li>
<button
type='button'
class='collapsed '>Ignite for Spark<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/extensions-and-integrations/ignite-for-spark/overview" class=''>Overview</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/ignite-for-spark/ignitecontext-and-rdd" class=''>IgniteContext and IgniteRDD</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/ignite-for-spark/ignite-dataframe" class=''>Ignite DataFrame</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/ignite-for-spark/installation" class=''>Installation</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/ignite-for-spark/spark-shell" class=''>Test Ignite with Spark-shell</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/ignite-for-spark/troubleshooting" class=''>Troubleshooting</a></li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/extensions-and-integrations/hibernate-l2-cache"
class=''
>Hibernate L2 Cache</a>
</li>
<li>
<a href="/docs/2.9.0/extensions-and-integrations/mybatis-l2-cache"
class=''
>MyBatis L2 Cache</a>
</li>
<li>
<button
type='button'
class='collapsed '>Streaming<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/extensions-and-integrations/streaming/kafka-streamer" class=''>Kafka Streamer</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/streaming/camel-streamer" class=''>Camel Streamer</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/streaming/flink-streamer" class=''>Flink Streamer</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/streaming/flume-sink" class=''>Flume Sink</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/streaming/jms-streamer" class=''>JMS Streamer</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/streaming/mqtt-streamer" class=''>MQTT Streamer</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/streaming/rocketmq-streamer" class=''>RocketMQ Streamer</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/streaming/storm-streamer" class=''>Storm Streamer</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/streaming/zeromq-streamer" class=''>ZeroMQ Streamer</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/streaming/twitter-streamer" class=''>Twitter Streamer</a></li>
</nav>
</li>
<li>
<button
type='button'
class='collapsed '>Cassandra Integration<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class="sub_pages collapsed">
<li><a href="/docs/2.9.0/extensions-and-integrations/cassandra/overview" class=''>Overview</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/cassandra/configuration" class=''>Configuration</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/cassandra/usage-examples" class=''>Usage Examples</a></li>
<li><a href="/docs/2.9.0/extensions-and-integrations/cassandra/ddl-generator" class=''>DDL Generator</a></li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/extensions-and-integrations/php-pdo"
class=''
>PHP PDO</a>
</li>
<li>
<a href="/docs/2.9.0/extensions-and-integrations/performance-statistics"
class=''
>Performance Statistics</a>
</li>
</nav>
</li>
<li>
<a href="/docs/2.9.0/plugins" class='' >Plugins</a>
</li>
<li>
<button type='button' class='group-toggle expanded '>Performance and Troubleshooting<img class="state-indicator" src="/assets/images/left-nav-arrow.svg" width="6" height="10"></button>
<nav class='nav-group expanded'>
<li>
<a href="/docs/2.9.0/perf-and-troubleshooting/general-perf-tips"
class=''
>General Performance Tips</a>
</li>
<li>
<a href="/docs/2.9.0/perf-and-troubleshooting/memory-tuning"
class=''
>Memory and JVM Tuning</a>
</li>
<li>
<a href="/docs/2.9.0/perf-and-troubleshooting/persistence-tuning"
class=''
>Persistence Tuning</a>
</li>
<li>
<a href="/docs/2.9.0/perf-and-troubleshooting/sql-tuning"
class=''
>SQL Tuning</a>
</li>
<li>
<a href="/docs/2.9.0/perf-and-troubleshooting/thread-pools-tuning"
class=''
>Thread Pools Tuning</a>
</li>
<li>
<a href="/docs/2.9.0/perf-and-troubleshooting/troubleshooting"
class=''
>Troubleshooting and Debugging</a>
</li>
<li>
<a href="/docs/2.9.0/perf-and-troubleshooting/handling-exceptions"
class='active'
>Handling Exceptions</a>
</li>
<li>
<a href="/docs/2.9.0/perf-and-troubleshooting/yardstick-benchmarking"
class=''
>Benchmarking With Yardstick</a>
</li>
</nav>
</li>
</nav>
<div class="left-nav__overlay"></div>
<article data-swiftype-index='true'>
<a class='edit-link' href="https://github.com/apache/ignite/tree/IGNITE-7595/docs/_docs/perf-and-troubleshooting/handling-exceptions.adoc" target="_blank">Edit</a>
<h1>Handling Exceptions</h1>
<div id="preamble">
<div class="sectionbody">
<div class="paragraph">
<p>This section outlines basic exceptions that can be generated by Ignite, and explains how to set
up and use the critical failures handler.</p>
</div>
</div>
</div>
<div class="sect1">
<h2 id="handling-ignite-exceptions">Handling Ignite Exceptions</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Exceptions supported by the Ignite API and actions you can take related to these exceptions are described below.
Please see the Javadoc <em>throws</em> clause for checked exceptions.</p>
</div>
<table class="tableblock frame-all grid-all stripes-even stretch">
<colgroup>
<col style="width: 25%;">
<col style="width: 35%;">
<col style="width: 30%;">
<col style="width: 10%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">Exception</th>
<th class="tableblock halign-left valign-top">Description</th>
<th class="tableblock halign-left valign-top">Action</th>
<th class="tableblock halign-left valign-top">Runtime exception</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>CacheInvalidStateException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown when you try to perform an operation on a cache in which some partitions have been lost. Depending on the partition
loss policy configured for the cache, this exception is thrown either on read and/or write operations.
See <a href="/docs/2.9.0/configuring-caches/partition-loss-policy">Partition Loss Policy</a> for details.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Reset lost partitions. You may want to restore the data by returning the nodes that caused the partition loss to the cluster.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Indicates an error condition in the cluster.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Operation failed. Exit from the method.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteClientDisconnectedException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown by the Ignite API when a client node gets disconnected from cluster. Thrown from Cache operations, compute API, and data structures.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Wait and use retry logic.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteAuthenticationException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown when there is either a node authentication failure or security authentication failure.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Operation failed. Exit from the method.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">No</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteClientException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Can be thrown from Cache operations.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Check exception message for the action to be taken.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteDeploymentException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown when the Ignite API fails to deploy a job or task on a node. Thrown from the Compute API.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Operation failed. Exit from the method.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteInterruptedException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Used to wrap the standard <code>InterruptedException</code> into <code>IgniteException</code>.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Retry after clearing the interrupted flag.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteSpiException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown by various SPI (<code>CollisionSpi</code>, <code>LoadBalancingSpi</code>, <code>TcpDiscoveryIpFinder</code>, <code>FailoverSpi</code>, <code>UriDeploymentSpi</code>, etc.)</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Operation failed. Exit from the method.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteSQLException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown when there is a SQL query processing error. This exception also provides query specific error codes.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Operation failed. Exit from the method.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteAccessControlException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown when there is an authentication / authorization failure.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Operation failed. Exit from the method.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">No</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteCacheRestartingException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown from Ignite cache API if a cache is restarting.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Wait and use retry logic.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteFutureTimeoutException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown when a future computation is timed out.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Either increase timeout limit or exit from the method.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteFutureCancelledException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown when a future computation cannot be retrieved because it was cancelled.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Use retry logic.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteIllegalStateException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Indicates that the Ignite instance is in an invalid state for the requested operation.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Operation failed. Exit from the method.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteNeedReconnectException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Indicates that a node should try to reconnect to the cluster.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Use retry logic.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">No</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteDataIntegrityViolationException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown if a data integrity violation is found.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Operation failed. Exit from the method.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteOutOfMemoryException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown when the system does not have enough memory to process Ignite operations. Thrown from Cache operations.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Operation failed. Exit from the method.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteTxOptimisticCheckedException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown when a transaction fails optimistically.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Use retry logic.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">No</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteTxRollbackCheckedException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown when a transaction has been automatically rolled back.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Use retry logic.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">No</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>IgniteTxTimeoutCheckedException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Thrown when a transaction times out.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Use retry logic.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">No</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>ClusterTopologyException</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Indicates an error with the cluster topology (e.g. crashed node, etc.). Thrown from Compute and Events API</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Wait on future and use retry logic.</p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Yes</p></td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="sect1">
<h2 id="critical-failures-handling">Critical Failures Handling</h2>
<div class="sectionbody">
<div class="paragraph">
<p>Ignite is a robust and fault tolerant system. But in the real world, some unpredictable issues and problems arise
that can affect the state of both an individual node as well as the whole cluster. Such issues can be detected at
runtime and handled accordingly using a preconfigured critical failure handler.</p>
</div>
<div class="sect2">
<h3 id="critical-failures">Critical Failures</h3>
<div class="paragraph">
<p>The following failures are treated as critical:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>System critical errors (e.g. <code>OutOfMemoryError</code>).</p>
</li>
<li>
<p>Unintentional system worker termination (e.g. due to an unhandled exception).</p>
</li>
<li>
<p>System workers hanging.</p>
</li>
<li>
<p>Cluster nodes segmentation.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>A system critical error is an error which leads to the system&#8217;s inoperability. For example:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>File I/O errors - usually <code>IOException</code> is thrown by file read/write operations. It&#8217;s possible when Ignite
native persistence is enabled (e.g., in cases when no space is left or on a device error), and also for in-memory
mode because Ignite uses disk storage for keeping some metadata (e.g., in cases when the file descriptors limit is
exceeded or file access is prohibited).</p>
</li>
<li>
<p>Out of memory error - when Ignite memory management system fails to allocate more space
(<code>IgniteOutOfMemoryException</code>).</p>
</li>
<li>
<p>Out of memory error - when a cluster node runs out of Java heap (<code>OutOfMemoryError</code>).</p>
</li>
</ul>
</div>
</div>
<div class="sect2">
<h3 id="failures-handling">Failures Handling</h3>
<div class="paragraph">
<p>When Ignite detects a critical failure, it handles the failure according to a preconfigured failure handler.
The failure handler can be configured as follows:</p>
</div>
<code-tabs><code-tab data-tab='XML'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="xml"><span class="nt">&lt;bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.configuration.IgniteConfiguration"</span><span class="nt">&gt;</span>
<span class="nt">&lt;property</span> <span class="na">name=</span><span class="s">"failureHandler"</span><span class="nt">&gt;</span>
<span class="nt">&lt;bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.failure.StopNodeFailureHandler"</span><span class="nt">/&gt;</span>
<span class="nt">&lt;/property&gt;</span>
<span class="nt">&lt;/bean&gt;</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nc">IgniteConfiguration</span> <span class="n">cfg</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">IgniteConfiguration</span><span class="o">();</span>
<span class="n">cfg</span><span class="o">.</span><span class="na">setFailureHandler</span><span class="o">(</span><span class="k">new</span> <span class="nc">StopNodeFailureHandler</span><span class="o">());</span>
<span class="nc">Ignite</span> <span class="n">ignite</span> <span class="o">=</span> <span class="nc">Ignition</span><span class="o">.</span><span class="na">start</span><span class="o">(</span><span class="n">cfg</span><span class="o">);</span></code></pre>
</div>
</div></code-tab></code-tabs>
<div class="paragraph">
<p>Ignite support following failure handlers:</p>
</div>
<table class="tableblock frame-all grid-all stripes-even stretch">
<colgroup>
<col style="width: 30%;">
<col style="width: 70%;">
</colgroup>
<thead>
<tr>
<th class="tableblock halign-left valign-top">Class</th>
<th class="tableblock halign-left valign-top">Description</th>
</tr>
</thead>
<tbody>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>NoOpFailureHandler</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Ignores any failures. Useful for testing and debugging.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>RestartProcessFailureHandler</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">A specific implementation that can be used only with <code>ignite.sh|bat</code>. The process must be terminated by using the <code>Ignition.restart(true)</code> method.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>StopNodeFailureHandler</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">Stops the node in case of critical errors by calling the <code>Ignition.stop(true)</code> or <code>Ignition.stop(nodeName, true)</code> methods.</p></td>
</tr>
<tr>
<td class="tableblock halign-left valign-top"><p class="tableblock"><code>StopNodeOrHaltFailureHandler</code></p></td>
<td class="tableblock halign-left valign-top"><p class="tableblock">This is the default handler, which tries to stop a node. If the node can&#8217;t be stopped, then the handler terminates the JVM process.</p></td>
</tr>
</tbody>
</table>
</div>
<div class="sect2">
<h3 id="critical-workers-health-check">Critical Workers Health Check</h3>
<div class="paragraph">
<p>Ignite has a number of internal workers that are essential for the cluster to function correctly. If one of them is
terminated, the node can become inoperative.</p>
</div>
<div class="paragraph">
<p>The following system workers are considered mission critical:</p>
</div>
<div class="ulist">
<ul>
<li>
<p>Discovery worker - discovery events handling.</p>
</li>
<li>
<p>TCP communication worker - peer-to-peer communication between nodes.</p>
</li>
<li>
<p>Exchange worker - partition map exchange.</p>
</li>
<li>
<p>Workers of the system&#8217;s striped pool.</p>
</li>
<li>
<p>Data Streamer striped pool workers.</p>
</li>
<li>
<p>Timeout worker - timeouts handling.</p>
</li>
<li>
<p>Checkpoint thread - check-pointing in Ignite persistence.</p>
</li>
<li>
<p>WAL workers - write-ahead logging, segments archiving, and compression.</p>
</li>
<li>
<p>Expiration worker - TTL based expiration.</p>
</li>
<li>
<p>NIO workers - base networking.</p>
</li>
</ul>
</div>
<div class="paragraph">
<p>Ignite has an internal mechanism for verifying that critical workers are operational.
Each worker is regularly checked to confirm that it is alive and updating its heartbeat timestamp.
If a worker is not alive and updating, the worker is regarded as blocked and Ignite will print a message to the log file.
You can set the period of inactivity via the <code>IgniteConfiguration.systemWorkerBlockedTimeout</code> property.</p>
</div>
<div class="paragraph">
<p>Even though Ignite considers an unresponsive system worker to be a critical error, it doesn&#8217;t handle this situation automatically,
other than printing out a message to the log file.
If you want to enable a particular failure handler for unresponsive system workers of all the types, clear the
<code>ignoredFailureTypes</code> property of the handler as shown below:</p>
</div>
<code-tabs><code-tab data-tab='XML'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="xml"><span class="nt">&lt;bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.configuration.IgniteConfiguration"</span><span class="nt">&gt;</span>
<span class="nt">&lt;property</span> <span class="na">name=</span><span class="s">"systemWorkerBlockedTimeout"</span> <span class="na">value=</span><span class="s">"#{60 * 60 * 1000}"</span><span class="nt">/&gt;</span>
<span class="nt">&lt;property</span> <span class="na">name=</span><span class="s">"failureHandler"</span><span class="nt">&gt;</span>
<span class="nt">&lt;bean</span> <span class="na">class=</span><span class="s">"org.apache.ignite.failure.StopNodeFailureHandler"</span><span class="nt">&gt;</span>
<span class="c">&lt;!-- Enable this handler to react to unresponsive critical workers occasions. --&gt;</span>
<span class="nt">&lt;property</span> <span class="na">name=</span><span class="s">"ignoredFailureTypes"</span><span class="nt">&gt;</span>
<span class="nt">&lt;list&gt;</span>
<span class="nt">&lt;/list&gt;</span>
<span class="nt">&lt;/property&gt;</span>
<span class="nt">&lt;/bean&gt;</span>
<span class="nt">&lt;/property&gt;</span>
<span class="nt">&lt;/bean&gt;</span></code></pre>
</div>
</div></code-tab><code-tab data-tab='Java'><div class="listingblock">
<div class="content">
<pre class="rouge highlight"><code data-lang="java"><span class="nc">StopNodeFailureHandler</span> <span class="n">failureHandler</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">StopNodeFailureHandler</span><span class="o">();</span>
<span class="n">failureHandler</span><span class="o">.</span><span class="na">setIgnoredFailureTypes</span><span class="o">(</span><span class="nc">Collections</span><span class="o">.</span><span class="na">EMPTY_SET</span><span class="o">);</span>
<span class="nc">IgniteConfiguration</span> <span class="n">cfg</span> <span class="o">=</span> <span class="k">new</span> <span class="nc">IgniteConfiguration</span><span class="o">().</span><span class="na">setFailureHandler</span><span class="o">(</span><span class="n">failureHandler</span><span class="o">);</span>
<span class="nc">Ignite</span> <span class="n">ignite</span> <span class="o">=</span> <span class="nc">Ignition</span><span class="o">.</span><span class="na">start</span><span class="o">(</span><span class="n">cfg</span><span class="o">);</span></code></pre>
</div>
</div></code-tab></code-tabs>
</div>
</div>
</div>
<div class="copyright">
© 2021 The Apache Software Foundation.<br/>
Apache, Apache Ignite, the Apache feather and the Apache Ignite logo are either registered trademarks or trademarks of The Apache Software Foundation.
</div>
</article>
<nav class="right-nav" data-swiftype-index='false'>
<div class="toc-wrapper">
<ul class="sectlevel1">
<li><a href="#handling-ignite-exceptions">Handling Ignite Exceptions</a></li>
<li><a href="#critical-failures-handling">Critical Failures Handling</a>
<ul class="sectlevel2">
<li><a href="#critical-failures">Critical Failures</a></li>
<li><a href="#failures-handling">Failures Handling</a></li>
<li><a href="#critical-workers-health-check">Critical Workers Health Check</a></li>
</ul>
</li>
</ul>
</div>
<nav class="promo-nav">
<!--#include virtual="/includes/docs_rightnav_promotion.html" -->
<a href="#" data-trigger-bugyard-feedback="true" id="doc-feedback-btn">Docs Feedback</a>
</nav>
</nav>
</section>
<script type='module' src='/assets/js/code-copy-to-clipboard.js' async crossorigin></script>
<script>
// inits deep anchors -- needs to be done here because of https://www.bryanbraun.com/anchorjs/#dont-run-it-too-late
anchors.add('.page-docs h1, .page-docs h2, .page-docs h3:not(.discrete), .page-docs h4, .page-docs h5');
anchors.options = {
placement: 'right',
visible: 'always'
};
</script>
<script src="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.js"></script>
<script>
docsearch({
// Your apiKey and indexName will be given to you once
// we create your config
apiKey: '3eee686c0ebe39eff3baeb18c56fa5f8',
indexName: 'apache_ignite',
// Replace inputSelector with a CSS selector
// matching your search input
inputSelector: '#search-input',
// algoliaOptions: { 'facetFilters': ["version:$VERSION"] },
// Set debug to true to inspect the dropdown
debug: false,
});
</script>
<script type='module' src='/assets/js/index.js?1639580146' async crossorigin></script>
<script type='module' src='/assets/js/versioning.js?1639580146' async crossorigin></script>
<link rel="stylesheet" href="/assets/css/styles.css?1639580146" media="print" onload="this.media='all'">
<noscript><link media="all" rel="stylesheet" href="/assets/css/styles.css?1639580146"></noscript>
<link rel="stylesheet" href="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.css" media="print" onload="this.media='all'">
<noscript><link media="all" rel="stylesheet" href="https://cdn.jsdelivr.net/npm/docsearch.js@2/dist/cdn/docsearch.min.css"></noscript>
</body>
</html>