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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?atlOrigin=eyJpIjoiYmNkMDhiMDQ1Mjg2NDEzOTg2OTkzNTliMTM3MTk5ZTkiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">Hibernate ORM</a> / <a href="https://hibernate.atlassian.net/browse/HHH-14138?atlOrigin=eyJpIjoiYmNkMDhiMDQ1Mjg2NDEzOTg2OTkzNTliMTM3MTk5ZTkiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none"><img src="cid:jira-generated-image-avatar-8fa40c97-25c3-4e84-b95e-f7abbe313aa3" height="16" width="16" border="0" align="absmiddle" alt="Bug" style="vertical-align: text-bottom"></a> <a href="https://hibernate.atlassian.net/browse/HHH-14138?atlOrigin=eyJpIjoiYmNkMDhiMDQ1Mjg2NDEzOTg2OTkzNTliMTM3MTk5ZTkiLCJwIjoiaiJ9" style="color: #3b73af; text-decoration: none">HHH-14138</a> </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="frostfreek" style="color:#6c797f;; color: #3b73af; text-decoration: none" id="email_frostfreek" href="https://hibernate.atlassian.net/secure/ViewProfile.jspa?accountId=5f29960d5227f50014d306b2"> Jamie Strachan </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">Using a second query while scrolling causes the ScrollableResults to be closed.<br><br>Minimal example:<br><br>{code:java}</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br></span> <span class="diffcontext"> public static void main(String[] args) <br> {<br> EntityManager em = getEntityManager();<br> // Query to be used while scrolling. Can be Native or not, <br> // it doesn't seem to matter what the query is. ( I just wanted to keep it simple)<br> Query qExtra = em.createNativeQuery("SELECT 1");<br> <br> Query q = em.createQuery("SELECT row FROM User row");<br> q.setMaxResults(10);<br> <br> @SuppressWarnings("rawtypes")<br> org.hibernate.query.Query hibernateQuery = q.unwrap(org.hibernate.query.Query.class);<br> <br> ScrollableResults sr = hibernateQuery.scroll();<br> <br> while(sr.next())<br> {<br> // Comment this query out and function finishes normally<br> qExtra.getSingleResult();<br> }<br> <br> em.close();<br> }</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br></span> <span class="diffcontext">{code}<br><br>Perhaps I am not supposed to unwrap the JPA2 query like that?<br>WIth Hibernate 5.1.0 and the following code to obtain a ScrollableResults, the example code works as expected:<br><br>{code:java}</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br></span> <span class="diffcontext"> org.hibernate.Query query = ((org.hibernate.jpa.internal.QueryImpl)q).getHibernateQuery();<br> ScrollableResults sr = query.scroll(ScrollMode.FORWARD_ONLY);</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br></span> <span class="diffcontext">{code}<br><br>However, running 5.4.18, it does not appear to matter what query I issue inside the loop, it will close the result set.<br><br>The resulting exception from 5.4.18:<br></span> <span class="diffaddedchars" style="background-color:#ddfade;"><br></span> <span class="diffcontext">{noformat}</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br></span> <span class="diffcontext">Exception in thread "main" org.hibernate.exception.GenericJDBCException: could not advance using next()<br> at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47)<br> at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113)<br> at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:99)<br> at org.hibernate.internal.ScrollableResultsImpl.convert(ScrollableResultsImpl.java:70)<br> at org.hibernate.internal.ScrollableResultsImpl.next(ScrollableResultsImpl.java:105)<br> at Test.main(Test.java:???)<br>Caused by: java.sql.SQLException: You can't operate on a closed ResultSet!!!<br> at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118)<br> at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:77)<br> at com.mchange.v2.c3p0.impl.NewProxyResultSet.next(NewProxyResultSet.java:691)<br> at org.hibernate.internal.ScrollableResultsImpl.next(ScrollableResultsImpl.java:100)<br> ... 1 more<br>Caused by: java.lang.NullPointerException<br> at com.mchange.v2.c3p0.impl.NewProxyResultSet.next(NewProxyResultSet.java:685)<br> ... 2 more</span> <span class="diffremovedchars" style="background-color: #ffe7e7; text-decoration:line-through;"><br></span> <span class="diffcontext">{noformat}<br><br>Thanks for any help</span> <span class="diffaddedchars" style="background-color:#ddfade;">\</span> <span class="diffcontext">!</span> <span class="diffaddedchars" style="background-color:#ddfade;"><br><br>Addendum:<br>I have tested the following code using the JPA2 getResultStream(), and it also produces the same exception:<br><br>\{code:java}<br><br>{noformat}public static void main(String[] args) <br>{<br> EntityManager em = EntityManagerSingleton.getEntityManager();<br> Query qExtra = em.createNativeQuery("SELECT 1");<br> Query q = em.createQuery("SELECT row FROM User row");<br><br> q.getResultStream().forEach(row -> { qExtra.getSingleResult(); });<br> em.close();<br>}{noformat}<br><br>\{code}<br><br>The exception from using getResultStream():<br><br>\{noformat}<br><br>Exception in thread "main" org.hibernate.exception.GenericJDBCException: could not advance using next()<br><br> at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47)<br><br> at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:113)<br><br> at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:99)<br><br> at org.hibernate.internal.ScrollableResultsImpl.convert(ScrollableResultsImpl.java:70)<br><br> at org.hibernate.internal.ScrollableResultsImpl.next(ScrollableResultsImpl.java:105)<br><br> at org.hibernate.query.internal.ScrollableResultsIterator.hasNext(ScrollableResultsIterator.java:33)<br><br> at java.util.Iterator.forEachRemaining(Iterator.java:115)<br><br> at java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1801)<br><br> at java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:580)<br><br> at org.hibernate.query.spi.StreamDecorator.forEach(StreamDecorator.java:155)<br><br> at Tester.main(Tester.java)<br><br>Caused by: java.sql.SQLException: You can't operate on a closed ResultSet\!\!\!<br><br> at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:118)<br><br> at com.mchange.v2.sql.SqlUtils.toSQLException(SqlUtils.java:77)<br><br> at com.mchange.v2.c3p0.impl.NewProxyResultSet.next(NewProxyResultSet.java:691)<br><br> at org.hibernate.internal.ScrollableResultsImpl.next(ScrollableResultsImpl.java:100)<br><br> ... 6 more<br><br>Caused by: java.lang.NullPointerException<br><br> at com.mchange.v2.c3p0.impl.NewProxyResultSet.next(NewProxyResultSet.java:685)<br><br> ... 7 more<br><br>\{noformat}</span> </td>
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