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<a href="https://community.jboss.org/index.jspa" style="text-decoration: none; color: #E1E1E1">JBoss Community</a></h1>
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Re: JBoss 6.1.0.Final SFSB concurrency issue
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created by <a href="https://community.jboss.org/people/PopOctavian">Octavian Pop</a> in <i>EJB3</i> - <a href="https://community.jboss.org/message/830287#830287">View the full discussion</a>
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<div class="jive-rendered-content"><p>No one experienced this?</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p>Below I posted the ContainerManagedConcurrencyInterceptor implementation which is invoked when a method from statefull beans is invoked.</p><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><pre class="jive-pre"><code class="jive-code jive-java"><font color="navy"><b>public</b></font> Object invoke(Invocation invocation) <font color="navy"><b>throws</b></font> Throwable
    <font color="navy">{</font>
        Lock lock = getLock(invocation);
        <font color="navy"><b>long</b></font> time = DEFAULT_MAX_TIMEOUT_VALUE;
        TimeUnit unit = DEFAULT_MAX_TIMEOUT_UNIT;
        AccessTimeoutEffigy timeout = getAccessTimeout((MethodInvocation) invocation);
 
 
        <font color="navy"><b>if</b></font> (timeout != <font color="navy"><b>null</b></font>)
        <font color="navy">{</font>
            <font color="navy"><b>if</b></font> (timeout.getTimeout() < 0)
            <font color="navy">{</font>
                <font color="darkgreen">// for any negative value of timeout, we just default to max timeout val and max timeout unit.</font>
                <font color="darkgreen">// violation of spec! But we don't want to wait indefinitely.</font>
                logger.debug(<font color="red">"Ignoring a negative @AccessTimeout value: "</font> + timeout.getTimeout() + <font color="red">" and timeout unit: "</font>
                        + timeout.getUnit().name() + <font color="red">". Will default to timeout value: "</font> + DEFAULT_MAX_TIMEOUT_VALUE
                        + <font color="red">" and timeout unit: "</font> + DEFAULT_MAX_TIMEOUT_UNIT.name());
            <font color="navy">}</font>
            <font color="navy"><b>else</b></font>
            <font color="navy">{</font>
                time = timeout.getTimeout();
                unit = timeout.getUnit();
            <font color="navy">}</font>
        <font color="navy">}</font>
        <font color="navy"><b>boolean</b></font> success = lock.tryLock(time, unit);
        <font color="navy"><b>if</b></font> (!success)
        <font color="navy">{</font>
            <font color="navy"><b>throw</b></font> <font color="navy"><b>new</b></font> ConcurrentAccessTimeoutException(<font color="red">"EJB 3.1 PFD2 4.8.5.5.1 concurrent access timeout on "</font> + invocation
                    + <font color="red">" - could not obtain lock within "</font> + time + unit.name());
        <font color="navy">}</font>
        <font color="navy"><b>try</b></font>
        <font color="navy">{</font>
            <font color="navy"><b>return</b></font> invocation.invokeNext();
        <font color="navy">}</font>
        <font color="navy"><b>finally</b></font>
        <font color="navy">{</font>
            lock.unlock();
        <font color="navy">}</font>
    <font color="navy">}</font>
</code></pre><p style="min-height: 8pt; height: 8pt; padding: 0px;"> </p><p style="text-align: left;">The invocations on <code class="jive-code jive-java">incrementNumber</code> from <code class="jive-code jive-java">GenericSFB</code> are serialized at <span style="font-family: 'Lucida Grande', Arial, Helvetica, sans-serif; background-color: #ffffff;">boolean success = lock.tryLock(time, unit);</span></p><p style="text-align: left;"><span style="font-family: 'Lucida Grande', Arial, Helvetica, sans-serif; background-color: #ffffff;">It does not make sens to have mutual exclusion for statefull beans invocatins, as it looks to be implemented.</span></p><p style="text-align: left;"><span style="font-family: 'Lucida Grande', Arial, Helvetica, sans-serif; background-color: #ffffff;"><br/></span></p></div>
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<p style="margin: 0;">Reply to this message by <a href="https://community.jboss.org/message/830287#830287">going to Community</a></p>
<p style="margin: 0;">Start a new discussion in EJB3 at <a href="https://community.jboss.org/choose-container!input.jspa?contentType=1&containerType=14&container=2029">Community</a></p>
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