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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-10905" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-fb5b08e6-88d9-4055-a7e5-b00107b6547f" height="16" width="16" border="0" align="absmiddle" alt="Improvement" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-10905" style="color: #3b73af; text-decoration: none">HHH-10905</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-10905" style="color: #3b73af; text-decoration: none">NullPointerException when StatelessSession.get(Class, Serializable, LockMode) called with null LockMode, instead of defaulting to LockMode.NONE</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="gabor.varga" id="email_gabor.varga" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?name=gabor.varga" style="color:#6c797f;; color: #3b73af; text-decoration: none">Gábor Varga</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">When calling {{StatelessSession.get(Class, Serializable, LockMode)}} with a {{null}} {{LockMode}} argument, a {{NullPointerException}} is thrown from the following code path:<br>{code}<br>java.lang.NullPointerException<br> at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:4004)<br> at org.hibernate.persister.entity.AbstractEntityPersister.load(AbstractEntityPersister.java:3989)<br> at org.hibernate.internal.StatelessSessionImpl.get(StatelessSessionImpl.java:182)<br> at org.hibernate.internal.StatelessSessionImpl.get(StatelessSessionImpl.java:170)<br>{code}<br><br>A self-contained demo is available in [^HHH-10905.zip], it's runnable with {{mvn clean test}}.<br><br>When the counterpart {{Session.get(Class<T>, Serializable, LockMode)}} is called with a {{null}} {{LockMode}}, it doesn't throw an exception (and works just fine).<br><br>It seems like the {{LockOptions}} instance in {{AbstractEntityPersister.getAppropriateLoader(LockOptions, SharedSessionContractImplementor)}} has different values for its {{lockMode}} field</span> <span class="diffaddedchars" style="background-color:#ddfade;">:</span> <span class="diffcontext"> {{LockMode.NONE}} in case of a stateful {{Session}}, and {{null}} in case of a {{StatelessSession}}. So {{getLoaders().get(null)}} returns a {{null}} {{UniqueEntityLoader}}, and attempting to call {{UniqueEntityLoader.load(Serializable, Object, SharedSessionContractImplementor, LockOptions)}} will throw the {{NullPointerException}}.<br><br>In case of a stateful {{Session}}, the {{LoadEvent(Serializable, String, Object, LockOptions, boolean, EventSource)}} constructor has the following code:<br>{code:java}<br>if ( lockOptions.getLockMode() == null ) {<br> lockOptions.setLockMode(DEFAULT_LOCK_MODE);<br>}<br>{code}<br>There is no similar default value check for the {{StatelessSession}} code path.<br><br>Maybe the {{StatelessSession}} should set the default {{LockMode.NONE}} lock mode when a {{null}} argument is passed? It would be more in line with the stateful {{Session}}, and would not throw {{NullPointerException}}.</span> </td>
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