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<a class="user-hover" rel="micw" id="email_micw" href="https://hibernate.onjira.com/secure/ViewProfile.jspa?name=micw" style="color:#6c797f;">Michael Wyraz</a>
created <img src="https://hibernate.onjira.com/images/icons/bug.gif" height="16" width="16" border="0" align="absmiddle" alt="Bug"> <a style='color:#6c797f;text-decoration:none;' href='https://hibernate.onjira.com/browse/HHH-7688'>HHH-7688</a>
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<a style='color:#6c797f;text-decoration:none;' href='https://hibernate.onjira.com/browse/HHH-7688'><strong>Bug in NonBatchingBatch makes session ununsable after failed transaction</strong></a>
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<strong style="font-weight:normal;color:#505050;">Issue Type:</strong>
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<img src="https://hibernate.onjira.com/images/icons/bug.gif" height="16" width="16" border="0" align="absmiddle" alt="Bug"> Bug
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<strong style="font-weight:normal;color:#505050;">Affects Versions:</strong>
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4.1.7 </td>
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<strong style="font-weight:normal;color:#505050;">Assignee:</strong>
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Unassigned </td>
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<strong style="font-weight:normal;color:#505050;">Attachments:</strong>
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test-hibernate-bug.zip </td>
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<strong style="font-weight:normal;color:#505050;">Components:</strong>
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core </td>
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<strong style="font-weight:normal;color:#505050;">Created:</strong>
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11/Oct/12 10:16 AM
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<strong style="font-weight:normal;color:#505050;">Description:</strong>
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<p style='margin-top:0;margin-bottom:10px;'>In NonBatchingBatch.addToBatch() are some bugs (missing try...finally) that leaves the class in an undefined condition if the statement there fails. In addition, statements are not closed on error.</p>
<p style='margin-top:0;margin-bottom:10px;'>I have attached a project that shows the bug and contains a fix.</p>
<p style='margin-top:0;margin-bottom:10px;'>Here's my complete description (which you will also find in ShowBug.java):</p>
<p style='margin-top:0;margin-bottom:10px;'> /**</p>
<ul>
<li>Description of the problem:</li>
<li></li>
<li>- we have a pre-bound session (as in OpenSessionInViewFilter) - there</li>
<li>are multiple transactions - one transaction fails - the transaction</li>
<li>manager disconnects the session (this is also true if the transaction</li>
<li>succeeds - so it should not be a problem) - according the docs</li>
<li>reconnecting should be done by transaction management - all following</li>
<li>transactions fail</li>
<li></li>
<li>In AbstractBatchImpl: try { doExecuteBatch(); } finally {
* releaseStatements(); }</li>
<li></li>
<li>Statements are released within the same Transaction (ensured via</li>
<li>try...finally)</li>
<li></li>
<li>In NonBatchingBatch: try { [...] final int rowCount =
* statement.executeUpdate(); [...] } catch ( SQLException e ) {
* LOG.debug( "SQLException escaped proxy", e ); throw
* sqlExceptionHelper().convert( e, "could not execute batch statement",
* entry.getKey() ); } getStatements().clear();</li>
<li></li>
<li>Problems with this implementation: - Statements are not released here</li>
<li>- Statements are not closed if the query fails (resource leak!) -</li>
<li>statement.clearBatch() is never called (not sure if this matters. at</li>
<li>least in AbstractBatchImpl it is called) - Statements are not removed</li>
<li>from the list</li>
<li></li>
<li>In the next transaction (which succeeds), releaseStatements() is</li>
<li>called which fails because the proxy is not valid anymore.</li>
<li></li>
<li>Solution:</li>
<li>Fix the method NonBatchingBatch.addToBatch() as in attached NonBatchingBatch_fixed.java</li>
<li></li>
<li>Details:</li>
<li>- move all the close/release stuff outside of the loop</li>
<li>- put the loop in a "try" block</li>
<li>- in the "finally" block call super.releaseStatements()</li>
<li>- in AbstractBatchImpl make releaseStatements() protected instead of private</li>
<li>(this should really be done to avoid dupplicate code)</li>
<li></li>
<li>
<p style='margin-top:0;margin-bottom:10px;'> */</p></li>
</ul>
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<strong style="font-weight:normal;color:#505050;">Project:</strong>
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<a style="color:#6c797f;" href="https://hibernate.onjira.com/browse/HHH">Hibernate ORM</a>
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<strong style="font-weight:normal;color:#505050;">Priority:</strong>
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<td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
<img src="https://hibernate.onjira.com/images/icons/priority_blocker.gif" height="16" width="16" border="0" align="absmiddle" alt="Blocker"> Blocker
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<strong style="font-weight:normal;color:#505050;">Reporter:</strong>
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<td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
<a class="user-hover" rel="micw" id="email_micw" href="https://hibernate.onjira.com/secure/ViewProfile.jspa?name=micw" style="color:#6c797f;">Michael Wyraz</a>
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<strong style="font-weight:normal;color:#505050;">Original Estimate:</strong>
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2h
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<strong style="font-weight:normal;color:#505050;">Remaining Estimate:</strong>
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<td style="color:#000000;font-family:Arial,FreeSans,Helvetica,sans-serif;font-size:12px;padding:0 0 10px 0;width:100%;">
2h
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