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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-2945" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-98b67e8e-c2da-4570-b8f4-3bf45d51be23" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HSEARCH-2945" style="color: #3b73af; text-decoration: none">HSEARCH-2945</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-2945" style="color: #3b73af; text-decoration: none">Pass the number of entities to index to the monitor right from the start</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-98b67e8e-c2da-4570-b8f4-3bf45d51be23" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom"> Improvement </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"> massindexer </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"> 03/Nov/2017 09:38 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"> 5.9 </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">Priority:</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-static-major-ff0dda07-a4f0-42f0-9e16-3906d29f2fd4" 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 currently pass the number of entities to index to the monitor in several steps: each time we start processing another entity type, we perform another call to <tt>MassIndexerProgressMonitor#addToTotalCount</tt>, and we expect users to update the total.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">The problem is, depending on the settings and the work load, we could theoretically end up updating the total a few hours after the indexing started. In such a situation, any attempt to use the total to give an idea of progress is doomed. Think about it: progress would dive from 90% to 50% as soon as we would start processing the next entity type.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">And yes, the problem actually affected at least one person: <a href="https://stackoverflow.com/questions/46936481/how-to-get-the-statistics-of-hibernate-lucene-index-creation-in-gui/46953465#comment81088171_46953465" class="external-link" rel="nofollow" style="color: #3b73af; text-decoration: none">https://stackoverflow.com/questions/46936481/how-to-get-the-statistics-of-hibernate-lucene-index-creation-in-gui/46953465#comment81088171_46953465</a></p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">I think that, at the very least, we should make sure to compute the total numbers when we start processing, regardless of how many types we were instructed to index in parallel.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Sure, we would run into consistency issues, because we would necessarily compute the total in a different transaction than the one in which we would retrieve the entities (so the final number of entities indexed could differ from the initially advertised number), but I think this would still be better than the current situation. Users can deal with a progress bar at 97% when we call <tt>MassIndexerProgressMonitor#indexingCompleted</tt>, or with progress going over 100%, especially if the errors are small. But the progress going from 90% to 50% is really an issue.</p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0">Maybe we could add an option to let the user choose between two strategies? Or even better: we could somehow amend the total during indexing, calling for example <tt>monitor.addToTotalCount( -1 )</tt> if, after we open the "indexing" transaction, we realize we will index one less entity than expected.</p> </td>
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