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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/HHH" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-11169" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-e97de343-ae77-4458-9edc-0800af23cbfe" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-11169" style="color: #3b73af; text-decoration: none">HHH-11169</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/HHH-11169" style="color: #3b73af; text-decoration: none">NullPointerException for @Immutable entities when hibernate.cache.use_reference_entries=true</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">Change By:</th>
<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="Shoot3R" id="email_Shoot3R" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=Shoot3R" style="color:#6c797f;; color: #3b73af; text-decoration: none">Igor Dmitriev</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"> <span class="diffcontext">I am using 2nd level cache and I have not a cacheable City entity,<br>this entity is mapped on a view and I've marked it as @Immutable:<br><br>@Entity(name="city_view")<br>@Immutable<br>class City{<br> @Id<br> private Long id;<br> private String name;<br>}<br><br>entityManager.createQuery("select c from City c", City.class).getResultList();<br><br>java.lang.NullPointerException<br> at org.hibernate.engine.internal.CacheHelper.fromSharedCache(CacheHelper.java:55)<br> at org.hibernate.engine.internal.CacheHelper.fromSharedCache(CacheHelper.java:67)<br> at org.hibernate.loader.Loader.instanceNotYetLoaded(Loader.java:1597)<br> at org.hibernate.loader.Loader.getRow(Loader.java:1515)<br> at org.hibernate.loader.Loader.getRowFromResultSet(Loader.java:726)<br> at org.hibernate.loader.Loader.processResultSet(Loader.java:953)<br> at org.hibernate.loader.Loader.doQuery(Loader.java:921)<br> at org.hibernate.loader.Loader.doQueryAndInitializeNonLazyCollections(Loader.java:355)<br> at org.hibernate.loader.Loader.doList(Loader.java:2554)<br> at org.hibernate.loader.Loader.doList(Loader.java:2540)<br> at org.hibernate.loader.Loader.listIgnoreQueryCache(Loader.java:2370)<br> at org.hibernate.loader.Loader.list(Loader.java:2365)<br> at org.hibernate.loader.hql.QueryLoader.list(QueryLoader.java:497)<br> at org.hibernate.hql.internal.ast.QueryTranslatorImpl.list(QueryTranslatorImpl.java:387)<br> at org.hibernate.engine.query.spi.HQLQueryPlan.performList(HQLQueryPlan.java:236)<br> at org.hibernate.internal.SessionImpl.list(SessionImpl.java:1300)<br> at org.hibernate.internal.QueryImpl.list(QueryImpl.java:103)<br> at org.hibernate.jpa.internal.QueryImpl.list(QueryImpl.java:573)<br> at org.hibernate.jpa.internal.QueryImpl.getResultList(QueryImpl.java:449)<br><br>It can be reproduced just for query, for findOne it's ok.<br><br>Exception is occurred due to cacheAccessStrategy is null in CacheHelper:<br>public static Serializable fromSharedCache(<br> SharedSessionContractImplementor session,<br> Object cacheKey,<br> RegionAccessStrategy cacheAccessStrategy) {<br> final SessionEventListenerManager eventListenerManager = session.getEventListenerManager();<br> Serializable cachedValue = null;<br> eventListenerManager.cacheGetStart();<br> try {<br> cachedValue = (Serializable)</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"> *</span> <span class="diffcontext">cacheAccessStrategy</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;">*</span> <span class="diffcontext">.get( session, cacheKey, session.getTimestamp() );<br> }<br> finally {<br> eventListenerManager.cacheGetEnd( cachedValue != null );<br> }<br> return cachedValue;<br> }<br><br>I've found the place why this piece of code is invoked.<br>class Loader, method instanceNotYetLoaded:<br>// see if the entity defines reference caching, and if so use the cached reference (if one).<br> if ( *session.getCacheMode().isGetEnabled() && persister.canUseReferenceCacheEntries()* ) {<br> final Object cachedEntry = CacheHelper.fromSharedCache(<br> session,<br> session.generateCacheKey(<br> key.getIdentifier(),<br> persister.getEntityMetamodel().getEntityType(),<br> key.getEntityName()<br> ),<br> persister.getCacheAccessStrategy()<br> );<br> if ( cachedEntry != null ) {<br> CacheEntry entry = (CacheEntry) persister.getCacheEntryStructure().destructure( cachedEntry, factory );<br> return ( (ReferenceCacheEntryImpl) entry ).getReference();<br> }<br> }<br><br>If I disable hibernate.cache.use_reference_entries=false everything is fine.<br></span> </td>
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