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<td class="page-title-pattern-first-line " style="padding: 0; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HSEARCH" style="color: #3b73af; text-decoration: none">Hibernate Search</a> / <a href="https://hibernate.atlassian.net/browse/HSEARCH-2640" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-0630c5de-9008-44a6-8c9a-11229c217bf0" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HSEARCH-2640" style="color: #3b73af; text-decoration: none">HSEARCH-2640</a> </td>
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<td style="vertical-align: top;; padding: 0; border-collapse: collapse; padding-right: 5px; font-size: 20px; line-height: 30px; mso-line-height-rule: exactly" class="page-title-pattern-header-container"> <span class="page-title-pattern-header" style="font-family: Arial, sans-serif; padding: 0; font-size: 20px; line-height: 30px; mso-text-raise: 2px; mso-line-height-rule: exactly; vertical-align: middle"> <a href="https://hibernate.atlassian.net/browse/HSEARCH-2640" style="color: #3b73af; text-decoration: none">Improve resilience of cleanup methods (close, etc.)</a> </span> </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Issue Type:</th>
<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-avatar-0630c5de-9008-44a6-8c9a-11229c217bf0" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom"> Improvement </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Affects Versions:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 5.6.1.Final, 5.8, 5.7.1.Final </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Unassigned </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Components:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> engine </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Created:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 20/Mar/2017 08:17 AM </td>
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<th style="color: #707070; font: normal 14px/20px Arial, sans-serif; text-align: left; vertical-align: top; padding: 2px 0">Fix Versions:</th>
<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 6 </td>
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<td class="has-icon" style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <img src="cid:jira-generated-image-static-major-3b06097b-ac81-4da9-925e-19c1d24cf224" height="16" width="16" border="0" align="absmiddle" alt="Major" style="vertical-align: text-bottom"> Major </td>
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<td style="padding: 0; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="yrodiere" id="email_yrodiere" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=yrodiere" style="color:#6c797f;; color: #3b73af; text-decoration: none">Yoann Rodière</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0; border-collapse: collapse; padding: 0 0 10px"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0; margin-top: 0">We have a lot of cleanup methods that do not account for the possibility of failure.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">For instance, in <tt>IndexManagerHolder.stop()</tt>:</p>
<div class="code panel" style="border-width: 1px;; border: 1px solid #cccccc; background: #f5f5f5; font-size: 12px; line-height: 1.333; font-family: monospace; border: 1px solid #cccccc; -moz-border-radius: 3px; border-radius: 3px; margin: 9px 0">
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<pre class="code-java" style="margin: 10px 0 0; margin-top: 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">public</span> <span class="code-keyword" style="color: #000091">synchronized</span> void stop() {
<span class="code-keyword" style="color: #000091">for</span> ( IndexManager indexManager : getIndexManagers() ) {
indexManager.destroy();
}
<span class="code-comment" style="color: #808080">// ... more code ...
</span> }
</pre>
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">If the first index manager fails to stop, then none of the following index manager will be stopped. But theoretically, they could be completely different implementations, and thus the second index manager may stop perfectly well even if the first one failed.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">There are many places making a similar mistake, most notably:</p>
<ul>
<li>IndexManagerHolder.stop</li>
<li>Most implementations of Stoppable.stop</li>
<li>Most implementations of IndexManager.destroy</li>
<li>ImmutableSearchFactory.close</li>
<li>SearchIntegratorBuilder.cleanupFactoryState (soon to be merged as part of <span class="jira-issue-macro" data-jira-key="HSEARCH-2277">
<!-- replace the span with an AUI template --> <a href="https://hibernate.atlassian.net/browse/HSEARCH-2277" class="jira-issue-macro-key issue-link" title="Some resources may not be cleaned on bootstrap failure" style="color: #3b73af; text-decoration: none"> <img class="icon" src="https://hibernate.atlassian.net/secure/viewavatar?size=xsmall&avatarId=12143&avatarType=issuetype"> HSEARCH-2277 </a> <span class="aui-lozenge aui-lozenge-subtle aui-lozenge-current jira-macro-single-issue-export-pdf" style="background: #cccccc; border: 1px solid #cccccc; border-radius: 3px; color: #333333; display: inline-block; font-size: 11px; font-weight: bold; line-height: 99%; margin: 0; padding: 2px 5px; text-align: center; text-decoration: none; text-transform: uppercase; background-color: #ffffff; border-color: #cccccc; color: #333333" bgcolor="#ffffff">In Progress</span> </span> )</li>
</ul> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">We may want to implement "composite cleanups" in a more reliable way, for instance with a utility object similar to Guava's <tt>Closer</tt> (see <a href="https://github.com/google/guava/wiki/ClosingResourcesExplained#closer)" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">here</a>). Note this class is very simple, we don't need Guava, we can just re-implement it ourselves.</p> </td>
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