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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: 10px 0 0; margin-top: 0">I have encountered the same issue using java 8, hibernate 5.4.15 and EhCache 3.8.1 as a second level cache.</p> <p style="margin: 10px 0 0">I've tracked it down by activating the <tt>sun.io.serialization.extendedDebugInfo</tt> property, which gives the <span class="nobr"><a href="https://hibernate.atlassian.net/secure/attachment/49683/49683_SerializationTrace.txt" title="SerializationTrace.txt attached to HHH-13503" data-attachment-type="file" data-attachment-name="SerializationTrace.txt" data-media-services-type="file" data-media-services-id="65fa156a-f681-4855-bb76-0d4502718e8e" rel="noreferrer" style="color: #3b73af; text-decoration: none">SerializationTrace.txt<sup><img class="rendericon" src="cid:jira-generated-image-static-link_attachment_7-e632a0da-9f24-42e1-9288-792472b82afe" height="7" width="7" align="absmiddle" alt="" border="0"></sup></a></span> attached</p> <p style="margin: 10px 0 0">In short, here's what I found:</p>
<ul>
<li>The result query cache doesn't work with queries using named parameters on fields which are typed using a <tt>javax.persistence.Convert</tt> converter</li>
<li>This is because the the resolved type which is stored inside <tt>org.hibernate.cache.spi.QueryKey</tt> is an instance of <tt>org.hibernate.type.descriptor.converter.AttributeConverterSqlTypeDescriptorAdapter</tt> which is not serializable.</li>
<li>When the key is then stored inside EhCache, it throws the NotSerializableException</li>
</ul> <p style="margin: 10px 0 0">I'm reasonably certain that this is not a regression, but something that surfaced when moving to EhCache 3 (never had any issues with EhCache 2)</p> <p style="margin: 10px 0 0">What I do for now is to disable the result cache for these queries, but I have no real solutions. Any ideas?</p> </td>
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