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<td class="page-title-pattern-first-line " style="padding: 0px; border-collapse: collapse; font-family: Arial, sans-serif; font-size: 14px; padding-top: 10px"> <a href="https://hibernate.atlassian.net/browse/HHH" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-10858" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-261d4b6f-f55a-4d95-8918-2a543bc52c48" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-10858" style="color: #3b73af; text-decoration: none">HHH-10858</a> </td>
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<td style="vertical-align: top;; padding: 0px; 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/HHH-10858" style="color: #3b73af; text-decoration: none">Could not find matching type descriptor for requested Java class [...]; using fallback</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: 0px; 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-261d4b6f-f55a-4d95-8918-2a543bc52c48" 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: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 4.3.11 </td>
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<td style="padding: 0px; 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">Created:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> 15/Jun/2016 11:09 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">Environment:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> Spring Boot 1.3.3, MariaDB 10.1.11 </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: 0px; 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-trivial-37ece63e-a69c-44c8-bf24-ec97992b9bf6" height="16" width="16" border="0" align="absmiddle" alt="Trivial" style="vertical-align: text-bottom"> Trivial </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">Reporter:</th>
<td style="padding: 0px; border-collapse: collapse; font: normal 14px/20px Arial, sans-serif; padding: 2px 0 2px 5px; vertical-align: top"> <a class="user-hover" rel="reliefpfeiler" id="email_reliefpfeiler" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=reliefpfeiler" style="color:#6c797f;; color: #3b73af; text-decoration: none">Andreas Ahlenstorf</a> </td>
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<td class="text-paragraph-pattern-container mobile-resize-text " style="padding: 0px; border-collapse: collapse; padding: 0 0 10px 0"> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0; margin-top: 0">Types that are persisted using JPA Attribute Converters (@Convert(converter = SomeClassConverter.class)) that do not implement Serializable cause warnings during the application startup:</p>
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2016-06-15 19:16:45.227 WARN 1198 --- [ost-startStop-1] o.h.t.d.java.JavaTypeDescriptorRegistry : Could not find matching type descriptor <span class="code-keyword" style="color: #000091">for</span> requested Java class [com.example.SomeClass]; using fallback
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</div> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">The application is working fine nonetheless and the warning goes away if I make the type implement Serializable. </p> <p style="margin-top:0;margin-bottom:10px;; margin: 10px 0 0 0">I've looked through the documentation, the issue database and the source code and I'm not sure whether this warning is a reason for concern. If it is, I would appreciate if the warning could be more helpful, e.g. by telling me what to do about it. Otherwise the warning should be demoted to a less alarming log level.</p> </td>
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