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<p style="margin: 10px 0 0 0">After several hours we were able to create a test case.<br /> Here all data that you need. </p>
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<b>ehcache.xml</b>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<ehcache updateCheck=<span class="code-quote" style="color: #009100">"<span class="code-keyword" style="color: #000091; color: #009100">false</span>"</span>
monitoring=<span class="code-quote" style="color: #009100">"on"</span>
dynamicConfig=<span class="code-quote" style="color: #009100">"<span class="code-keyword" style="color: #000091; color: #009100">false</span>"</span>
name=<span class="code-quote" style="color: #009100">"TestCache"</span>>
<defaultCache maxEntriesLocalHeap=<span class="code-quote" style="color: #009100">"2"</span>/>
</ehcache>
</pre>
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<b>hibernate.xml</b>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<property name=<span class="code-quote" style="color: #009100">"hibernate.cache.use_second_level_cache"</span>><span class="code-keyword" style="color: #000091">true</span></property>
<property name=<span class="code-quote" style="color: #009100">"net.sf.ehcache.configurationResourceName"</span>>ehcache.xml</property>
<property name=<span class="code-quote" style="color: #009100">"hibernate.default_batch_fetch_size"</span>>0</property>
<property name=<span class="code-quote" style="color: #009100">"hibernate.cache.provider_class"</span>>org.hibernate.cache.ehcache.EhCacheProvider</property>
<property name=<span class="code-quote" style="color: #009100">"hibernate.cache.use_structured_entries"</span>><span class="code-keyword" style="color: #000091">true</span></property>
<property name=<span class="code-quote" style="color: #009100">"hibernate.cache.use_query_cache"</span>><span class="code-keyword" style="color: #000091">true</span></property>
<property name=<span class="code-quote" style="color: #009100">"hibernate.cache.use_minimal_puts"</span>><span class="code-keyword" style="color: #000091">true</span></property>
<property name=<span class="code-quote" style="color: #009100">"hibernate.max_fetch_depth"</span>>1</property>
<property name=<span class="code-quote" style="color: #009100">"hibernate.cache.region.factory_class"</span>>org.hibernate.cache.ehcache.EhCacheRegionFactory</property>
</pre>
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<b>create.sql</b>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
drop table <span class="code-keyword" style="color: #000091">if</span> exists EhCacheDeadLockTest;
create table EhCacheDeadLockTest (`id` <span class="code-object" style="color: #910091">int</span> not <span class="code-keyword" style="color: #000091">null</span>,`value` varchar(255) not <span class="code-keyword" style="color: #000091">null</span>, primary key (`id`) ) engine=InnoDB;
insert into EhCacheDeadLockTest values (1,'1');
insert into EhCacheDeadLockTest values (2,'2');
insert into EhCacheDeadLockTest values (10010003,'3');
insert into EhCacheDeadLockTest values (10010004,'4');
</pre>
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<b>EhCacheDeadLockEntity.java</b>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">import</span> org.hibernate.annotations.Cache;
<span class="code-keyword" style="color: #000091">import</span> org.hibernate.annotations.CacheConcurrencyStrategy;
<span class="code-keyword" style="color: #000091">import</span> javax.persistence.Column;
<span class="code-keyword" style="color: #000091">import</span> javax.persistence.Entity;
<span class="code-keyword" style="color: #000091">import</span> javax.persistence.Id;
<span class="code-keyword" style="color: #000091">import</span> javax.persistence.Table;
@Entity
@Table( name = <span class="code-quote" style="color: #009100">"EhCacheDeadLockTest"</span> )
@Cache( usage = CacheConcurrencyStrategy.READ_WRITE )
<span class="code-keyword" style="color: #000091">public</span> class EhCacheDeadLockEntity
{
        @Id
        @Column( name = <span class="code-quote" style="color: #009100">"id"</span> )
        <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">int</span> id;
        @Column( name = <span class="code-quote" style="color: #009100">"value"</span> )
        <span class="code-keyword" style="color: #000091">private</span> <span class="code-object" style="color: #910091">String</span> value;
        <span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">int</span> getId()
        {
                <span class="code-keyword" style="color: #000091">return</span> id;
        }
        <span class="code-keyword" style="color: #000091">public</span> void setId( <span class="code-object" style="color: #910091">int</span> id )
        {
                <span class="code-keyword" style="color: #000091">this</span>.id = id;
        }
        <span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">String</span> getValue()
        {
                <span class="code-keyword" style="color: #000091">return</span> value;
        }
        <span class="code-keyword" style="color: #000091">public</span> void setValue( <span class="code-object" style="color: #910091">String</span> value )
        {
                <span class="code-keyword" style="color: #000091">this</span>.value = value;
        }
        @Override
        <span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">String</span> toString()
        {
                <span class="code-keyword" style="color: #000091">return</span> <span class="code-quote" style="color: #009100">"EhCacheDeadLockEntity{"</span> +
                                <span class="code-quote" style="color: #009100">"id="</span> + id +
                                <span class="code-quote" style="color: #009100">", value='"</span> + value + '\'' +
                                '}';
        }
        @Override
        <span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">boolean</span> equals( <span class="code-object" style="color: #910091">Object</span> o )
        {
                <span class="code-keyword" style="color: #000091">if</span> ( <span class="code-keyword" style="color: #000091">this</span> == o ) <span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">true</span>;
                <span class="code-keyword" style="color: #000091">if</span> ( !( o <span class="code-keyword" style="color: #000091">instanceof</span> EhCacheDeadLockEntity ) ) <span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">false</span>;
                EhCacheDeadLockEntity that = (EhCacheDeadLockEntity) o;
                <span class="code-keyword" style="color: #000091">if</span> ( id != that.id ) <span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">false</span>;
                <span class="code-keyword" style="color: #000091">return</span> <span class="code-keyword" style="color: #000091">true</span>;
        }
        @Override
        <span class="code-keyword" style="color: #000091">public</span> <span class="code-object" style="color: #910091">int</span> hashCode()
        {
                <span class="code-keyword" style="color: #000091">return</span> id;
        }
}
</pre>
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<b>EhCacheDeadLockTest.java</b>
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<pre class="code-java" style="margin: 10px 0 0 0; max-height: 30em; overflow: auto; white-space: pre-wrap; word-wrap: normal">
<span class="code-keyword" style="color: #000091">private</span> <span class="code-keyword" style="color: #000091">static</span> <span class="code-keyword" style="color: #000091">final</span> <span class="code-object" style="color: #910091">int</span>[] ID_LIST = <span class="code-keyword" style="color: #000091">new</span> <span class="code-object" style="color: #910091">int</span>[]{ 1, 2, 10010003, 10010004 };
<span class="code-keyword" style="color: #000091">static</span> <span class="code-keyword" style="color: #000091">volatile</span> <span class="code-object" style="color: #910091">boolean</span> finish = <span class="code-keyword" style="color: #000091">false</span>;
<span class="code-keyword" style="color: #000091">static</span> AtomicInteger counter = <span class="code-keyword" style="color: #000091">new</span> AtomicInteger();
class Worker <span class="code-keyword" style="color: #000091">implements</span> <span class="code-object" style="color: #910091">Runnable</span>
        {
                Random rnd = <span class="code-keyword" style="color: #000091">new</span> Random();
                @Override
                <span class="code-keyword" style="color: #000091">public</span> void run()
                {
                        <span class="code-keyword" style="color: #000091">while</span> ( !finish )
                        {
                                <span class="code-keyword" style="color: #000091">try</span>
                                {
                                        <span class="code-keyword" style="color: #000091">final</span> Session session = HibernateFactory.getCurrentSession();
                                        Transaction tx = session.beginTransaction();
                                        <span class="code-keyword" style="color: #000091">try</span>
                                        {
                                                session.clear();
                                                <span class="code-object" style="color: #910091">int</span> id = ID_LIST[rnd.nextInt( ID_LIST.length )];
                                                EhCacheDeadLockEntity entity = (EhCacheDeadLockEntity) session.get( EhCacheDeadLockEntity.class, id );
                                                entity.setValue( <span class="code-object" style="color: #910091">String</span>.valueOf( rnd.nextInt() ) );
                                                session.save( entity );
                                        }
                                        <span class="code-keyword" style="color: #000091">finally</span>
                                        {
                                                tx.commit();
                                                counter.incrementAndGet();
                                        }
                                }
                                <span class="code-keyword" style="color: #000091">catch</span> ( Throwable e )
                                {
                                        <span class="code-object" style="color: #910091">System</span>.out.println( e );
                                }
                        }
                }
        }
        @Test
        <span class="code-keyword" style="color: #000091">public</span> void testDeadLock() <span class="code-keyword" style="color: #000091">throws</span> Exception
        {
                <span class="code-keyword" style="color: #000091">final</span> <span class="code-object" style="color: #910091">int</span> THREAD_COUNT = 32;
                Worker[] workers = <span class="code-keyword" style="color: #000091">new</span> Worker[THREAD_COUNT];
                <span class="code-object" style="color: #910091">Thread</span>[] threads = <span class="code-keyword" style="color: #000091">new</span> <span class="code-object" style="color: #910091">Thread</span>[THREAD_COUNT];
                <span class="code-keyword" style="color: #000091">for</span> ( <span class="code-object" style="color: #910091">int</span> i = 0; i < workers.length; i++ ) workers[i] = <span class="code-keyword" style="color: #000091">new</span> Worker();
                <span class="code-keyword" style="color: #000091">for</span> ( <span class="code-object" style="color: #910091">int</span> i = 0; i < workers.length; i++ ) threads[i] = <span class="code-keyword" style="color: #000091">new</span> <span class="code-object" style="color: #910091">Thread</span>( workers[i] );
                <span class="code-keyword" style="color: #000091">for</span> ( <span class="code-object" style="color: #910091">int</span> i = 0; i < workers.length; i++ ) threads[i].start();
                <span class="code-object" style="color: #910091">Thread</span>.sleep( 5000 );
                <span class="code-object" style="color: #910091">System</span>.out.println( <span class="code-quote" style="color: #009100">"counter="</span> + counter.get() );
                finish = <span class="code-keyword" style="color: #000091">true</span>;
                <span class="code-keyword" style="color: #000091">for</span> ( <span class="code-object" style="color: #910091">int</span> i = 0; i < workers.length; i++ ) threads[i].join();
}
</pre>
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