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<a class="user-hover" rel="maschmid" id="email_maschmid" href="https://issues.jboss.org/secure/ViewProfile.jspa?name=maschmid" style="color:#003366;">Marek Schmidt</a>
created <img src="https://issues.jboss.org/images/icons/bug.gif" height="16" width="16" border="0" align="absmiddle" alt="Bug"> <a style='color:#003366;text-decoration:none;' href='https://issues.jboss.org/browse/WELD-1164'>WELD-1164</a>
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<a style='color:#003366;text-decoration:none;' href='https://issues.jboss.org/browse/WELD-1164'><strong>CLONE - Weld - Deadlock between SFSB Synchronization lock and Weld AbstractContext session context lock</strong></a>
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<strong style="font-weight:normal;color:#505050;">Issue Type:</strong>
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<img src="https://issues.jboss.org/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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1.1.8.Final, 2.0.0.Alpha2 </td>
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<strong style="font-weight:normal;color:#505050;">Assignee:</strong>
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<a class="user-hover" rel="luksa" id="email_luksa" href="https://issues.jboss.org/secure/ViewProfile.jspa?name=luksa" style="color:#003366;">Marko Lukša</a>
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<strong style="font-weight:normal;color:#505050;">Attachments:</strong>
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helloworld.tar.gz, jboss-as-helloworld.war, jstack.txt </td>
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<strong style="font-weight:normal;color:#505050;">Components:</strong>
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Scopes & Contexts </td>
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<strong style="font-weight:normal;color:#505050;">Created:</strong>
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10/Jul/12 10:07 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;'>There is a deadlock between SFSB Synchronization lock and the Weld AbstractContext session context lock, which causes the SFSB and the session context to be locked until the SFSB lock timeouts with javax.ejb.ConcurrentAccessTimeoutException.</p>
<p style='margin-top:0;margin-bottom:10px;'>The situation can be caused by a producer inside a SFSB, such as:</p>
<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-java">@Stateful
@SessionScoped
<span class="code-keyword">public</span> class StatefulProducer
{
@Inject
<span class="code-keyword">private</span> Instance<OnDemandBean> onDemandBean;
@Produces
@SessionScoped
<span class="code-keyword">public</span> Thing getThing() {
<span class="code-keyword">return</span> <span class="code-keyword">new</span> Thing();
}
<span class="code-keyword">public</span> void demand() {
<span class="code-object">Thread</span>.sleep(2000);
onDemandBean.get().foo();
}
}</pre>
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<div class="code panel" style="border-width: 1px;"><div class="codeContent panelContent">
<pre class="code-java">@SessionScoped
<span class="code-keyword">public</span> class OnDemandBean <span class="code-keyword">implements</span> Serializable {
<span class="code-keyword">public</span> void foo() {}
}</pre>
</div></div>
<p style='margin-top:0;margin-bottom:10px;'>The problem occurs when there are two requests in the same session, with the first one calling StatefulProducer.demand and the other request injecting the Thing. The first request locks the SFSB synchronization lock first and then the Weld AbstractContext lock during the "onDemandBean.get()" call. The second request locks the Weld AbstractContext lock first and the SFSB synchronization lock next (during the producer getThing() call)</p>
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<strong style="font-weight:normal;color:#505050;">Environment:</strong>
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JBoss AS 7.1.2.Final
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<strong style="font-weight:normal;color:#505050;">Project:</strong>
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<a style="color:#003366;" href="https://issues.jboss.org/browse/WELD">Weld</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://issues.jboss.org/images/icons/priority_major.gif" height="16" width="16" border="0" align="absmiddle" alt="Major"> Major
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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="maschmid" id="email_maschmid" href="https://issues.jboss.org/secure/ViewProfile.jspa?name=maschmid" style="color:#003366;">Marek Schmidt</a>
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